interacoustics_ad229e_service_manual_complete.pdf

8/17/2019 Interacoustics_AD229e_Service_manual_complete.pdf

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Service Manual

Diagnostic Audiometer AD229e

Part Num ber 80672108

Valid from s erial no. 867761


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AD229e Service Manual page 1

Contents

Contents ...................................................................................................................................................................... 1

General Technical Specifications ............................................................................................................................. 2 Specification of input/output connections .......................................................................................................... 4

Calibration properties ......................................................................................................................................... 5 Survey of reference values for pure tone audiometer calibration ...................................................................... 7

Survey of speech reference values ................................................................................................................... 7

Disassembly ............................................................................................................................................................... 9 Electrical Assembling Instrument....................................................................................................................... 9

Accessories and Parts ............................................................................................................................................. 10 Consumables and Parts .................................................................................................................................. 11

Schematics ............................................................................................................................................................... 12 Block Diagram .................................................................................................................................................. 12

Main board Diagram ........................................................................................................................................ 14 Component Index Top ........................................................................................................................... 21

Main board Index Bottom ...................................................................................................................... 22

Main board Component Part list ............................................................................................................ 23

LED Board Diagram ......................................................................................................................................... 28 Component Index and Values ............................................................................................................... 29

Component Index and Values ............................................................................................................... 29 Connection Board A Diagram .......................................................................................................................... 30

Components Index and Partlist ............................................................................................................. 31 Connection Board B Diagram .......................................................................................................................... 32

Component Index and Partlist ............................................................................................................... 33

Fuse PCB ......................................................................................................................................................... 34

Calibration Procedure .............................................................................................................................................. 35 Service, adjustment and repair ........................................................................................................................ 35

Equipment for adjustment ...................................................................................................................... 35

Hardware Calibration ....................................................................................................................................... 35

Calibration of Attenuator in channel 1 ................................................................................................... 35 Calibration of Attenuator in channel 2 ................................................................................................... 36

LCD angle adjustment ........................................................................................................................... 36

Speech Input Amplifier Adjustment . ..................................................................................................... 36

Talk Forward Sensitivity ........................................................................................................................ 38 Software Calibration ........................................................................................................................................ 38

General Description ............................................................................................................................... 38

What to do ............................................................................................................................................. 38

Tone Calibration .................................................................................................................................... 38 Narrow Band Calibration ....................................................................................................................... 38

White Noise Calibration ......................................................................................................................... 39

Speech Calibration ................................................................................................................................ 39

Speech Noise Calibration ...................................................................................................................... 39

Appendix A Descript ion of the RS232 Interface version 2.00 ............................................................................... 1 General Specification ......................................................................................................................................... 1

Control Wires ..................................................................................................................................................... 2

Communication .................................................................................................................................................. 3 Audiological Information .................................................................................................................................... 4

Test Results ....................................................................................................................................................... 5

Controlling the AD229 ........................................................................................................................................ 6

AD229 Status ..................................................................................................................................................... 7 Interacoustics RS232 Utility Program ...................................................................................................... 9

AD229 OnLine ................................................................................................................................................. 10

Examples of Transmission .................................................................................................................... 10

Window Routines in C++ ................................................................................................................................. 11 Transmit Data from PC to Instrument .................................................................................................... 11

Receive Data from Instrument ............................................................................................................... 12

Appendix B Sett ing of Set-up items in AD229 Extended ....................................................................................... 1 Introduction ........................................................................................................................................................ 1

Setup Items ........................................................................................................................................................ 1

Appendix U Update News ......................................................................................................................................... 1


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General Technical Specifications

Medical CE-mark: The CE-mark indicates that Interacoustics A/S meets the requirements of Annex VI of theMedical Device Directive 93/42/EEC.Approval of the quality system is made by TÜV – identification no. 0123.

Standards: Safety: IEC 60601-1, Class I, Type B(using UPS400 external power supply)

EMC: IEC 60601-1-2

Aud iometer: IEC 60645-1/ANSI S3.6 , Type 2 Tone audiometerIEC 60645-2/ANSI S3.6, Type B or B-E Speech audiometer

Power: UPS400 External power supply.Rating 100-240 VAC, 50-60Hz, 60VAFuses: 2xT1A + 1xT2A located on PCBOperation environment: Temperature: 15 – 35 °C

Rel. Humidity: 30 – 90%Transport temperature: -20-50 °CStorage temperature: 0-50 °C

Warm up time: 3 minutes at room temperature (20 °C).

Functions Signal sources: Tone: 11 pure tone and warble test frequencies in the range of 125 – 8000Hz

Masking: Narrow band noise, in 11 bands.White noise.Speech Noise.

Inputs : Tape 1/2

Mic.

Talk Back

Pat. Response

Remote

Power UPS400

Connection for CD or tape player.Connection for external microphone for live speech.Connection for patients talk back microphone. Level adjustment on theoperation panel.Connection for patient response switch. Response lamp will light whenactivated.Connection for remote controlled Tone presentation switch.

Connection for external power supply.Outputs: Earphone Right /Left:

Can be selected to be either standard earphones or insert phones bypressing shift Right/Left. Speech output can be selected as electricallylinear (Type B) or free field equivalent (Type B-E) using TDH39.

Bone conductor: Masking in Right or Left earphone can be selected.If selected, the handheld paediatric loudspeaker (PLS) can be connectedinstead of the bone conductor.

Insert maskingphone

For use of CIR22.

Free Field 1 and 2: Electrical outputs for external 2 channel power amplifier. Mode 1 is forAP12 while mode 2 is for AP70.

Monitor: Monitor earphone disconnects the internal monitor loudspeaker wheninserted. Operator can monitor the signals presented to the patient as well

as the talk back signal from the patient’s microphone.MTP10: Use of MTP10 as printer devicePrinter: Laser printer with HP GL2 language

Ink jet or matrix printer using IBM mode (optional)Desk jet printers using HP PCL L3 language (optional)

RS232 Input/output for computer communication. See separate section in ServiceManual for programming details

PatientCommunication:

Talk Forward: Operator to patient communication. 10 – 110 dB continuously adjustableon the operation panel

Attenuator: -10 to 120 dB in 1 or 5 dB steps for tone and speech. The upper 20 dB is accessed by pressing the+20 dB button.0 – 110 dB in 1 or 5 dB steps for masking noise.

Tone Switch: Silent touch switch for soft presentation of signals. Tone lamp will light when activated.Tone presentation: Manual: Tone is presented by activation of Tone Switch.

Reverse: Tone is interrupted by activation of Tone Switch.Pulse: Single pulse or automatic pulsing with selectable on/off times of 250 –

5000ms.


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Auto Threshold: Patient controlled Hughson-Westlake test according to ISO 8253-1 with automatic storing of thethreshold values in the internal memory.Patient response is open for 2 seconds after signal presentation.2 out of 3 or 3 out of 5 correct responses can be selected.

Békésy: Pure tone or narrow band stimulation. Fixed frequency. Continuous and pulsed tone.Buzzer: If selected, it will indicate end of automatic test.Special test types: SISI: With automatic score calculation (5 dB included for familiarisation).

Stenger: Binaural pure tone or speech stimulation. ABLB: Automatic loudness balance test (Fowler).Langenbeck Tone in noise.Master hearing aid: Simulation of a 2 channel hearing aid with selectable high pass filters

having slopes of 6 dB, 12 dB, 18 dB per octave and a high frequencyemphasis filter.

Store When activated, the disp layed values for AC L/R, BC L/R or FF1 and 2 are stored in theinternal memory.

Stored values can be printed out on a prin ter if connected.

Synchronous Masking: Locks Channel 2 attenuator to Channel 1 attenuator.Channel 2 options: Output of Channel 2 can be set up to be either Narrow Band or White noise. Furthermore one of the

audiometric frequencies can be used as Reference tone.Speech level indicator: A signal level of 0 dB on the VU meter indicates that the output to the selected transducer is

calibrated.


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Frequencies and maximum intensities

Frequency Air conduction Boneconduction

InsertMasking

Free Field

TDH39 EAR-Tone3A

B71 NB/WN Mode 1 Mode 2

Hz dB HL dB HL dB HL dB HL dB HL dB HL125 90 90 -- 80 70 80250 110 105 45 100 80 90

500 120 110 65 110 90 100750 120 115 70 110 90 1001000 120 120 70 110 90 1001500 120 120 70 110 90 1002000 120 120 75 110 90 1003000 120 120 80 110 90 1004000 120 115 80 110 90 1006000 120 100 55 110 85 958000 110 95 50 90 80 90

IEC60645-2

100 90 50 - 70 80

Type B ANSI 100 100 50 - 70 80

Speech STAF 95 90 50 - 90 100IEC

60645-2110 90 50 - 90 100

Type B-E

ANSI 90 100 50 - 70 80

STAF 110 90 50 - 90 100IEC

60645-2100 90 - 90 70 80

Type B ANSI 100 100 - 100 70 80Speech STAF 95 90 - 90 90 100Noise IEC

60645-2110 90 - 90 90 100

Type B-

E

ANSI 90 100 - 100 70 80

STAF 110 90 - 90 90 100

Specification of input/output connections

Inputs Connector type Electrical properties

Power UPS400 DIN, 5 pole Pin 1 and 2:Pin 3:Pin 4:Pin 5:

0V+5V-12V+12V

Patient response Jack, 6.3mm stereo Handheld switch: Switches 5V to the logic input.

(The switch current is 40mA)Remote control Jack, 6.3mm stereo Handheld switch Switches 5V to the input (The input is forced tognd. through 10kΩ).

Tape 1/2 Phono Sensitivity:Impedance:Freq. Response:

3 mV at max volume and 0 Vu

47.5kΩ

75 – 12000 Hz ±3 dBMicrophone Jack, 6.3mm stereo Type:

Sensitivity:Impedance:Freq. Response:Electret bias:

Electret or 200Ω dynamic microphone

100µV at max volume for 0 Vu reading

47.5 KΩ

90-12000Hz ±3 dB

6.2V through 4.75 KΩ (1.3 mA)

Talk backmicrophone Jack, 6.3mm stereo As for Microphone

Outputs:

Phones, Left/ Right Jack, 6.3mm mono Voltage: Up to 5.5V rms. by 10Ω load


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Min. load impedance: 5Ω Bone conductor Jack, 6.3mm mono As for Phones,

Left/RightInsert maskingphone

Jack, 6.3mm mono Voltage:Min. load impedance:

Up to 5.5V rms. by 100Ω load

100Ω Free Field 1, 2 Jack, 6.3mm mono Voltage:

Min. load impedance:Up to 8V rms. by 100Ω load

100Ω Monitor Jack, 6.3mm mono Voltage:

Min. load impedance:

Max. 2V rms. by 8 Ω load

0Ω

Data I/O:

RS232C 9 pole Cannon RS232 serial port forcommunication

See appendix A in service manual for detailedinformation

MTP10 9 pole Cannon Serial port For use of MTP10 as printing device.Printer 25 pole Cannon Parallel port Standard connection for laser printer, using

HPGL2 language.By addition of a built-in adapter (IPA26), therange of printers are increased to:Desk jet printer, using HP PCL L3 language.Matrix and Inc Jet printers using IBM mode.IPA26 adapter is not longer available.

Other electrical specifications: VU meter True r.m.s measurement with a response time of 360ms.Warble 5 Hz sine, ±5% modulation

Calibration properties

Calibrated Transducers: Earphones: Telephonics TDH39 with a static force of 4.5N ±0.5NBone conductor: Radioear B71 with a static force of 5.4N ±0.5NInsert phones: EAR Tone 3A (Option)Insert masking phone: CIR22 (Option)

Accuracies: Generally the instrument is made and calibrated to be within and better than thetolerances required in the specified audiometer standards:Frequency: ±1%Pure tone levels: ±3 dB for 125 – 4000Hz

±5 dB for 6000 – 8000HzSpeech frequencyresponse: -0/-10 dB at 125 – 249 Hz

±3 dB at 250 – 4000 Hz

±5 dB at 4001 – 6300 Hz

Tone calibration standards and spectral properties: Earphones Pure tone: ISO 389-1 / ANSI S3.6 for TDH39.

Narrow band noise:− Spectral properties:

ISO 389-1 / ANSI S3.6 + ISO 389-4 valuesIEC 60645-1, Narrow band noise

White noise:

− Spectral properties:

SPLIEC 60645-1, White noise

Bone conductor Pure tone: ISO 389-3 / ANSI S3.6. Valid for placement on thehuman mastoid

Insert phones Pure tone: ISO 389-2Narrow band noise:− Spectral properties:

ISO 389-2+ ISO 389-4 valuesIEC 60645-1, Narrow band noise, electrically measured.

White noise:− Spectral properties:

SPLIEC 60645-1, White noise, electrically measured.

Insert masking phone Narrow band noise:


ISO 389-2 + ISO 389-4 valuesIEC 60645-1, Narrow-band noise, electrically measured.


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SPLIEC 60645-1, White noise, electrically measured.

Free field output(calibrated on location)

Pure tone: ISO 389-7 Free field

Narrow band noise:Spectral properties:

ISO 389-7 Diffuse fieldIEC 60645-1, Narrow band noise


SPLIEC 60645-1, White noise

Speech calibration standards and spectral properties:

Earphones Speech signal1 IEC 60645-2/ANSI S3.6, type B,B-E, or STAFF:Speech weightedmasking:− Spectral properties:

IEC 60645-2/ANSI S3.6, type B,B-E, or STAFFIEC 60645-2, type B or B-E masking sound

Bone conductor Speech signal:− Spectral properties:

IEC 60645-2IEC 60645-2, electrically measured.

Insert phones Speech signal: IEC 60645-2, type BSpeech weightedmasking:


IEC 60645-2, type BIEC 60645-2. Masking sound, uncorrected, electricallymeasured.

Insert masking phone Speech weighted

masking:− Spectral properties:

IEC 60645-2, type B

IEC 60645-2.Masking sound, uncorrected, electricallymeasured.

Free field output Speech signal: IEC 60645-2, ANSI S3.6 or STAFFSpeech weightedmasking:− Spectral properties:

IEC 60645-2, ANSI S3.6 or STAFFIEC 60645-2 Masking sound

1 The speech calibration signal recommended by IEC 60645-2, type B-E-calibration, can be track 32 from Westra CD no. 1.By calibration of ANSI and IEC 60645-2, type B a 1000Hz sine tone is used.


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Survey of reference values for pure tone audiometer calibration

Freq. ISO 389-1

(TDH39)

ANSI S3.6

(TDH39)

ISO 389-4(ISO 8798)

(NBmasking)

ISO 389-3(ISO 7566)

(BC)

ANSI S3.6

(BC)

ISO 389-2

(Insert)

ISO 389-7Free field

(FF)

ISO 389-7Diffuse-field

(FF)

[Hz] [dB re. 20

µPa]

[dB re. 20

µPa]

[dB re. 20

µPa]

[dB re. 1µN] [dB re. 1µN] [dB re. 20

µPa]

[dB re. 20

µPa]

[dB re. 20

µPa]

125 45,0 45 4 26 22,0 22,0

250 25,5 25,5 4 67 67 14 11,0 11,0500 11,5 11,5 4 58 58 5,5 4,0 3,5

750 7,5 8 5 48,5 48,5 2 2,0 1,0

1000 7 7 6 42,5 42,5 0 2,0 0,5

1500 6,5 6,5 6 36,5 36,5 2 0,5 -1,0

2000 9 9 6 31 31 3 -1,5 -1,5

3000 10 10 6 30 30 3,5 -6,0 -4,0

4000 9,5 9,5 5 35,5 35,5 5,5 -6,5 -5,0

6000 15,5 15,5 5 40 2 2,5 -0,5

8000 13 13 5 40 0 11,5 5,5

Survey of speech reference values

IEC 60645-2 ANSI S3.6 STAF 1996TypeA/B

Type A/B-E Type A/B/C Type A/B/C-E

Type A/B Type A/B-E

[dB] [dB] [dB] [dB] [dB] [dB]

Earphones Calibration signal 20 0 or 3,8* 19,5 19,5 22 NS(0)

(IEC 303 coupler) Speech weightedmasking

20 0 or 3,8* 19,5 19,5 27 NS(0)

Bone conductor Calibration signal 55 NS(55) 55 NS(55) NS(55) NS(55)


55 NS(55) 55 NS(55) NS(55) NS(55)

Loudspeaker Calibration signal 20 0 14,5 14,5 0 NS(0)

Speech weightedmasking

20 0 14,5 14,5 0 NS(0)

Insert phones Calibration signal 20 NS(20) 12,5 NS(12,5) 21 NS(21)


20 NS(20) 12,5 NS(12,5) NS(26) NS(26)

Insert maskingphone


20 NS(20) 12,5 NS(12,5) NS(26) NS(26)

NS = Not Standardised. Values in brackets are used by factory calibration.* = Values for Germany

Coupler types used by calibration

− TDH39 is calibrated using a 6cc acoustic coupler made in accordance to IEC 303

− Insert phones are calibrated using a 2cc acoustic coupler made in accordance to IEC 126− Bone Conductor is calibrated using a mechanical coupler made in accordance to IEC 373


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General properties for earphones

Sound attenuation values for earphones Difference between free field and couplersensiti vity levels. Used by Free Field equivalent

earphone output (Type A-E or B-E)

Frequency Attenuation Frequency Correction valuesTDH39 with

MX41/AR or PN 51cushion

EAR-Tone 3A TDH39 with MX41/AR or PN51 cushion using IEC 303

coupler[Hz] [dB] [dB] [Hz] [dB]

125 3 32.5 125 -17.5

160 4 - 160 -14.5

200 5 - 200 -12

250 5 36 250 -9.5

315 5 - 315 -6.5

400 6 - 400 -3.5

500 7 37.5 500 -0.5

630 9 - 630 0

750 - - 750 -

800 11 - 800 -0.5

1000 15 36.5 1000 -0.5

1250 18 - 1250 -1

1500 - - 1500 -

1600 21 - 1600 -4

2000 26 33 2000 -6

2500 28 - 2500 -7

3000 - - 3000 -

3150 31 - 3150 -10.5

4000 32 39.5 4000 -10.5

5000 29 - 5000 -11

6000 - - 6000 -

6300 26 - 6300 -10.5

8000 24 42.5 8000 1.5

General about Specifications

Interacoustics continuously strive to improve the products and their performance. Therefore the specifications can be subject tochange without notice.The performance and specifications of the instrument can only be guarantied if it is subject to a technical maintenance at least oncea year. This should be made by a workshop, authorised by Interacoustics.Questions about representatives and products may be sent to:

Interacoustics A/S Phone: +45 63713555

Drejervaenget 8 Fax: +45 63713522

DK 5610 Assens email: [email protected]

Denmark http: www.interacoustics.com


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Disassembly

Electrical Assembling Instrument


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Accessories and Parts

Item # IA Item Number Descript ion

80003602 TDH39 Audiometric headset

80020004 IEC-M21 symmetric mono

Earphone cable

80003401 HBA Audiometric head band

76401301 TDH-39P 10 Ohm

Earphone Telephonics

80044801 DD51 Cushion

80000701 B71 Bone Conductor

30° plug

80220202 IEC-B11 Conductor cable

80220501 B71 Bone Conductor

80220701 P3333 Headband for B71

80201402 APS3 Patient response switch


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Consumables and Parts

Consumables


81401401 Pen set

81410002 Audiogram chart AF12

Parts


500001xx Power supply UPS400

373003xx Cable for UPS400

36300101 Button rotary Ø36xØ6

Dark grey

36300201 Cap curved Ø32.5xØ28.3x5

Dark grey

36302001 Digitast bottom part

55000101 Goose neck 072/073

36200101 PSC filter 063/072


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Schematics

Block Diagram

Document Number

Sheet of

Title

Rev

Organization

Interacoustics a/s

xd bl 0011 00000

AD229e Blockdiagram

MBA1 2

CD/Tape 2

IC18B

CD/Tape 1

IC42

Talk Forward/Mic.

IC41

Ext. Mic. amp.

0

IC38

IC45

IC44

IC37

IC36

IC35

IC34

IC18A

7

6

5

4

3

2

1

RMS

IC74A

IC74B

VCA

VCA

IC46

IC79

IC80

3

P7

Mic.

P8

Tape 1

P9

P10

IC48IC47

6

2

Tape 2

P15

Talk Forward

sensitivity

7

1

4

3

5

0

6

2

7

1

4

3

5

0

6

2

7

1

4

5

0

GND

GND

MP9 MP10

MP18MP19

VU

CI BI AI

CI AIBI

CI AIBI

AIBICI

0

0

AIBICI

Input code

0

00

0

0

0

0

1

1

1

1

1

1

1

0

Input Channel 2Input Channel 1

111

Tape1

VU meter

Tape2

Tape2 Tape1

Ext. Mic.Ext. Mic.

Built-in Mic.Built-in Mic.

Talk Forward Talk Forward Talk Forward

Tape2Tape2

Tape2

Off

Off

Off

Off

Off

Off

Off

Of f Of f

Off

1 1

00

To CODEC (IC19)

To CODEC (IC19)


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Document Number

Title

Organization

Interacoustics a/s

xd bl 0011 00000

AD229e Blockdiagram

2

3

4

0

1

2

3

5

4

0

1

5

Ch2

Ch1

TBTalk Back

Front Panel

MP12

VCA

IC52

IC51

Talk BackP11

IC53

Mon. Ch2 Talk B.

Mon. Ch1

VCA

IC56

Front PanelP12Monitor

DSP

BOOT

EPROM

DSP

2186

IC15

IC16

12KHz

LPF

IC27 and IC49

IC22 and IC43

STEREO

CODEC

PCM3001

IC19

IC28

IC23

12KHz

LPF

0 - 20dB

0 - 20dB

0 - 120dB

0 - 120dB

IC29

IC25IC24

ATT.

ATT. FIX ATT.

FIXATT.

IC30IC31

IC26

MP4

MP5 MP15

MP14

+20dB

+20dB

IC59

IC59

CH2

CH1

+20dB_2

+20dB_1

AA3_2

AA0_1

AA1_1 AA2_1

AA3_1

AA0_2

AA1_2 AA2_2

OUTPUT

SWITCH

CH2

OUTPUT

SWITCH

CH1

DUAL DAC

AD7249

IC21

IC60

IC61

OS1AOS1B

OS1C

OS2COS2B

OS2A

IC65

IC64

IC67

IC66

IC63

IC62

FF2

FF1

Right

Left

Bone

Reset

Insert

Masking

I C7 4A I C 74 B

VDD

GND

VDD

VDD

AA_XX=CHAN NEL No.

3 2 1 0

0 0 0 0 -20dB

0 0 0 1 - 0dB

0 0 1 0 - 5dB

0 1 0 0 -10dB

1 0 0 0 -15dB

MP13

IC32IC57

Monitor

KEYBOARD

5450

IC7

RAM

IC6/IC77

TONE SWITCH

IC68

LCD

Angel Adjust

CPU

RS232

IC17

Reset

GreenZ180

DUAL PORT

IC12

IC69

BUZZER

P2

IC3

IC11

IC1

PARALLEL

PRINTER

P1Remote

KEYBOARD

IC13

RC3

Brightness

Control

Front

Panel

Orange

Tone On

MP1

MTP10

PRINTER

EEPROMEPROM

Reset

LIGHT

Pat. Response

0 S X X=CHANNEL N0.

C B A

0 0 0 Lef t

0 0 1 Right

0 1 0 Bone

0 1 1 Insert Masking

1 0 0 FF 1

1 0 1 FF 2

1 1 0

1 1 1


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16/65


17/65

RMS

RMS CONVERTER TO VU IN

TALK BACK MIC. AMP.

MONITOR CH1/CH2 AMP.

TALK B.

TALK B.P.

Referring Potentiometers:

C - Type Antilog.

A - Type Linear

Digital

Supply

VDD = +5V

DGND = 0V

VDD1 = +12V

VEE1 = -12V

AGND = 0V

VDDA = +5V

VEEA = -5V

Supply

Analog

Vu

TONEPage1,2

MON.CH1Page1

MON.CH2Page1

MON.TBPage1

CH2MONPage6

CH1MONPage6

Vu inputPage4

Vu outPage2

VDD1

VDD1

VDD1

VDD1

VEEA

VEE1VEE1

VEE1

VEE1

VEE1

VEE1

VEE1

VEE1GND

GND

GND

GNDGND

GND

GND

GND

GND

GNDGND

GNDGND

GND

VDDA

VEEAVDD1

VDD1

VDD1

VDD1

VDD

GND

GND

GND

GND

VDD

VDD1

VDD-Vu

GND

GND

GND

GND

GND

GNDVEE1

VDD1

GND

GND

GND

GND

GND

GND

GND

GND

GND

VEE1VEE1 VDD1

GND

VDD1

VEE1

GND

GNDGND

C187 100n 10 %

+ C17415u20%

R149

0

C130100n

C1 80 10 0p 5%

R17121K5

R168

165K

MX6

123

P10

10K

C181100n

R17221K5

R169

165K

IC52OP27

3

2

7

4

C112100n

C182100n

R157 20K

IC47

AD736

VIN2

CC1

VDD7

GND8

VEE4

OUT 6

CF 3

CAV 5

C183

100n

R170 20K

R213 165K

C111100n

C128100n

P16NP

+

-

IC48OP27

3

26

7

4

C127

100n

C185100n

P124K7

A

R167NP

C188

100n

R16047K5

R47243K

C189100n

C178100p5%

C253 220n20%

C125 2 2p 5%

+

-

IC51

OP27

3

26

7

4

R29 18K2

C179

220n20%

R30

C254 220n20%

C121100n

R176NP

MP11

IC39OP27

3

26

7

4

R129 NP

C133 22

R16318K2

IC40

THAT2181S

2 5

8

6

7 3

4

1

C129100n

IC53

4053

X012 X113

Y02 Y11

Z05 Z13

INH6 A

11 B10

C9

X 14

Y 15

Z 4

VDD 16

VSS 8

VEE 7

IC50OP27

3

26

7

4

C2521u10%

C113100n

R 15 1 0

R15047K5

IC54B

TL072

5

67

R1532K

MP12

R158

4K75

IC54ATL072

3

21

8

4

R154 14K3

R60243K

R159

2K49

C126100n

P17NP

C172

220n20%

P114K7

C

R161

1K

R1643K92

IC14C74HC04

5 6

IC33THAT2181S

2 5

8

6

7 3

4

1

C186 100 n 10 %

C122100n

+C17322u20%

D48

6V2

R162 30K1

R1733K92

C176 100n 10%

+ C17510u20%

+C177

47u

20%

R156

165K


18/65


19/65


20/65


21/65


22/65


Component Index Top


23/65


Main board Index Bottom


24/65


Main board Component Part list

Complete assembled board PCA 51000204

Qty. Part reference Part No. Descript ion Descript ion 2

1 69000201 Mainboard 072/073 PCB 4L 1.6mm 35my 1pr.Sheet

4 D49 D50 D51 D52 61700601 3.3V 0.5W Minimelf/SOD80C Zener diode Vishay

1 D1. 61700101 3.9V 0.5W Minimelf /SOD80C Zener diode NXP

3 D24 D25 D48 61700501 6.2V 0.5W Minimelf/SOD80C Zener diode NXP2 D18 D19 61700301 SL23 30V 2.0A DO214AA Schottky diode Vishay2 L1 L2 60204702 0R 1% 0.25W 1206 Resistor1 L3. 63800101 NFW31SP206X1E4L Filter Chip

20Hz/200mA/25V1 IC13. 62000301 HEF4070BT SO14 IC Exclusive OR Gate1 IC53. 62001901 CD4053BCM SO16 IC Multiplex/Demul.

Fairchild1 IC71. 62002301 MC14490DWG SOW16 IC Hex Cont Bounce

Eliminator

2 IC2,75 62000901 MM74HC4040M SO16 IC Binary Ripple counterFairc

22 IC26 IC31 IC39 IC41 IC42 IC45IC48 IC50 IC51 IC52 IC55 IC57IC58 IC62 IC63 IC64 IC65 IC66IC67 IC72 IC73 IC80

62031601 OP27GS SO8 IC Op-Amp. "Reel" AD

1 IC74. 62002401 LM6142BIM SO8 IC Dual OP-Amp. National10 IC18 IC20 IC22 IC23 IC27 IC28

IC38 IC43 IC44 IC4962000701 OP275GS SO8 IC Op-Amp. Dual Analog

Dev.

1 IC32. 62001501 SSM2211S SO8 IC Audio Power AmplifierAD

1 IC3. 62001401 TL7705ACD1/A SO8 IC Suplly Voltage

Supervisor1 IC21. 62001001 AD7249ARZ SOW16 IC D/A Converter AD1 IC19. 62000801 PCM3001E SSOP28 IC CODEC Burr Brown2 IC25 IC30 62001201 SSM2404S SOW20 IC Audio Switch AD1 IC47. 62001801 AD736JR SO8 IC RMS-to-DC Converter1 IC59. 62002101 SSM2402S SOW16 IC Audio Switch AD1 IC8. 62002501 K6X0808C1D-BF55 SOP28-

8.4IC SRAM 32Kx8Bit 55nSSamsung

2 IC6 IC77 62002901 93LC66B SO8 IC EEPROM MICROCHIP4 IC9 IC10 IC11 IC70 62002601 Z84C2006VEG PLCC44 IC Z80 PIO ZILOG1 IC1. 62000101 Z8018010VSG PLCC68 IC Z80 Microprocessor

ZILOG

1 IC15. 62000501 ADSP-2184BST-160TQFP100

IC DSP Microcomputer AD

1 IC12. 62000201 MM5450YV PLCC44 IC Display Driver Micrel2 IC68 IC69 62002201 MAX202ECSE SO16 IC RS-232 Transceiver

MAXIM

1 T16. 62002701 MDC3105LT1 SOT23 IC Inductive Load DriverON

2 C118 C119 61400601 3n3 1% 50V 1206 Capacitor ceramic NP01 C174. 61000101 15u 20% 35V Ø6.3x5.2 Capacitor lyt Standard

85ºC1 C173. 61000601 22u 20% 35V Ø6.3x5.2 Capacitor lyt Standard

85ºC3 C3 C73 C93 61000301 68u 20% 10V Ø6.3x5.5 Capacitor lyt Standard105ºC

2 X1 X3 63201401 12.288MHz NX1255GB11.8x5.5mm

Crystal NDK


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1 X2. 63201501 16.670MHz NX1255GB11.8x5.5mm

Crystal NDK

1 P13. 63400101 2K 3314J-1-202E SingleTurn Trim potentiometerBOURNS

3 P4 P6 P14 63400301 1K 3314J-1-102E Single Turn Trim potentiometerBOURNS

2 P3 P5 63400201 5K 3314J-1-502E Single Turn Trim potentiometer

BOURNS4 RL1 RL2 RL3 RL4 64500101 SMD11A05 / PRMA1A05 5V Relay SRC1 V3. 64300301 MC78L05ACD +5V SO8 Voltage regulator ON-Semi2 V1 V4 64300101 MC79L05ACDR -5V SO8 Voltage reg. 100mA

TEXAS1 V2. 64300201 LP2957IS +5V TO263 Voltage ref. Low-Dropout

NS2 T2 T17 64600402 BC847B NPN SOT23 Transistor3 T10 T12 T14 64600201 MJD122G Darlington NPN

TO252Transistor MOTOROLA-ONsemi

3 T11 T13 T15 64600301 MJD127G Darlington PNPTO252

Transistor MOTOROLA-ONsemi

1 T1. 64600102 BC857B PNP SOT23-3 Transistor2 R94 R116 60404001 10K5 1% 0.1W 0603 Resistor2 R93 R115 60403901 13K3 1% 0.1W 0603 Resistor6 R42 R43 R47 R60 R61 R62 60402701 243K 1% 0.1W 0603 Resistor4 R79 R80 R197 R198 60403101 5K36 1% 0.1W 0603 Resistor8 R88 R110 R145 R164 R173

R217 R251 R25760403501 3K92 1% 0.1W 0603 Resistor

2 R196 R261 60402301 12K4 1% 0.1W 0603 Resistor4 R101 R102 R201 R209 60400301 21K 1% 0.1W 0603 Resistor3 R154 R180 R182 60400801 14K3 1% 0.1W 0603 Resistor2 R82 R104 60403301 44K2 1% 0.1W 0603 Resistor

2 R90 R112 60403701 1K10 1% 0.1W 0603 Resistor4 R17 R153 R195 R199 60400901 2K 1% 0.1W 0603 Resistor2 R227 R228 60401801 200R 1% 0.1W 0603 Resistor11 R29 R30 R86 R89 R108 R111

R144 R146 R163 R252 R25860402401 18K2 1% 0.1W 0603 Resistor

7 C71 C91 C202 C202 C222 C284C286;

61400201 100p 1% 50V 0603 Capacitor ceramic NP0

2 C42 R162 61401301 68n 10% 16V 0603 Capacitor ceramic X7R25 C58 R72 R74 R92 R94 R168

R192 R233 R234 R235 R236R237 R238 R240 R241 R242R243 R244 R252 R255 R256

R261 R276 R279 R280

61401601 1u 10% 16V 0805 Capacitor ceramic X7R

6 IC24 R29 R33 R40 R46 R56 62001101 THAT2181BS SO8 reel IC Voltage ControlledAmp.

2 R2 R48 60401401 301R 1% 0.1W 0603 Resistor1 IC17. 62000601 IDT7130SA20J PLCC52 IC Static RAM 1Kx8Bit IDT13 R13 R14 R15 R64 R71 R72 R136

R149 R151 R225 R240 R243R244

60400102 0R 0.1W 0603 Resistor

2 C60 C108 60400102 0R 0.1W 0603 Resistor1 J1. 60400102 0R 0.1W 0603 Resistor3 R186 R189 R194 60425801 3R01 1% 0.1W 0603 Resistor3 R185 R188 R193 60401201 100R 1% 0.1W 0603 Resistor 100ppm

27 R9 R10 R11 R52 R53 R54 R55R56 R57 R58 R59 R68 R96 R118R134 R142 R161 R177 R178R179 R218 R229 R230 R234R235 R256 R259

60403601 1K 1% 0.1W 0603 Resistor


26/65



3 R181 R183 R214 60401601 1K30 1% 0.1W 0603 Resistor4 R152 R155 R232 R233 60401901 1K50 1% 0.1W 0603 Resistor2 R91 R113 60403801 2K21 1% 0.1W 0603 Resistor3 R66 R132 R159 60402901 2K49 1% 0.1W 0603 Resistor19 R18 R19 R20 R21 R22 R23 R24

R25 R26 R65 R92 R114 R131R158 R190 R191 R210 R211

R226

60401101 4K75 1% 0.1W 0603 Resistor

4 R77 R78 R99 R100 60403001 4K99 1% 0.1W 0603 Resistor30 R1 R3 R4 R5 R6 R7 R8 R16 R31

R32 R39 R40 R41 R49 R50 R51R75 R76 R97 R98 R137 R204R205 R206 R207 R215 R219R223 R238 R255

60400201 10K 1% 0.1W 0603 Resistor

3 R157 R170 R239 60402001 20K 1% 0.1W 0603 Resistor6 R81 R130 R135 R139 R162

R20060403201 30K1 1% 0.1W 0603 Resistor

14 R33 R34 R35 R67 R133 R150R160 R212 R216 R236 R237R241 R242 R254

60402501 47K5 1% 0.1W 0603 Resistor

3 R220 R221 R222 60401701 100K 1% 0.1W 0603 Resistor2 R138 R247 60400501 1M 1% 0.1W 0603 Resistor16 C43 C44 C45 C46 C85 C105

C163 C164 C178 C180 C191C216 C219 C229 C257 C258


2 C53 C55 61401501 470p 5% 50V 0603 Capacitor ceramic C0G149 C4-21 C25 C28-30 C32 C35-39

C52 C57 C62-64 C66 C68 C69C76-81 C83 C84 C86-89 C96-100 C103 C104 C106 C107C109-113 C116 C117 C121-124C126-132 C134 C156-160 C165C166 C170 C171 C176 C181-190C194 C195 C198-201 C207 C208C214 C215 C217 C218 C220C221 C227 C228 C230-232 C239C245-248 C250 C260 C264 C267C268 C270 C271 C278 C282C289 C290-308

61401102 100n 10% 16V 0603 Capacitor ceramic X7R

6 C101 C125 C133 C137 C169C281


1 C265. 61400901 1n5 10% 50V 0603 Capacitor ceramic X7R4 C70 C114 C283 C287 61401701 10n 1% 25V 1206 Capacitor ceramic NP01 C22. 61400801 10p 2% 50V 1206 Capacitor ceramic NP0

11 C1 C2 C23 C24 C33 C34 C47C48 C203 C210 C223


14 C26 C31 C59 C65 C67 C82 C102C175 C249 C251 C259 C262C266 C269

61000201 10u 20% 35V Ø5.3x5.2 Capacitor lyt Standard105ºC

7 C54 C56 C75 C95 C196 C197C263

61000501 4u7 20% 50V Ø5x5.8 Capacitor lyt Standard105ºC

4 D15 D16 D17 D28 61700201 LL4148 75VMinimelf/SOD80C

Diode Vishay/NXP

6 IC34 IC35 IC36 IC37 IC60 IC61 62001601 HEF4051BT SO16 IC Multip. / Demultip. NXP2 IC14 IC76 62000401 74HC04D SO14 IC Hex inverter NXP2 IC4 IC5 62001701 74HC138D SO16 IC Line

Decoder/Demultiplexer2 P7 P10 63402001 10K 3314J-1-103E Single

TurnTrim potentiometerBOURNS

7 R83 R105 R143 R184 R187 60400701 3K01 1% 0.1W 0603 Resistor


27/65



R192 R2532 R103 R231 60400401 82K5 1% 0.1W 0603 Resistor2 R37 R38 60402601 10M 1% 0.1W 0603 Resistor18 C40 C49 C50 C51 C61 C172

C179 C204 C205 C206 C211C212 C213 C224 C225 C226C253 C254

61401201 220n 20% 25V 0603 Capacitor ceramic Y5V

3 C41 C161 C177 61000402 47u 20% 16V Ø6.3x5 Capacitor lyt Standard85ºC3 C27 C167 C277 61401001 10n 5% 25V 0603 Capacitor ceramic X7R1 IC54. 62002001 TL072CD SO8 IC Op-Amp. Dual TEXAS4 R156 R168 R169 R213 60401501 165K 1% 0.1W 0603 Resistor2 R44 R45 60402801 182R 1% 0.1W 0603 Resistor2 R171 R172 60401001 21K5 1% 0.1W 0603 Resistor2 R85 R107 60403401 3K40 1% 0.1W 0603 Resistor4 C90 C115 C285 C288 61401801 1n 1% 50V 0805 Capacitor ceramic NP01 C120. 61400701 10u 10/20% 6.3V 0805 Capacitor ceramic X5R1 R140. 60400601 9K09 1% 0.1W 0603 Resistor1 R249. 60402201 8K45 1% 0.1W 0603 Resistor1 R245. 60402101 29K4 1% 0.1W 0603 Resistor3 RC1 RC2 RC3 75801301 16Pol IC Socket PCB Conn. 0.3" Preci-Dip1 A3. 75800901 20Pol IC Socket PCB Conn. Preci-Dip2 A12 A24 75800801 32Pol IC Socket PCB Conn. 0.6" Preci-Dip1 MX10. 75801001 2Pol AMP Male PCB Conn. Straight whit lock

TYCO

2 MX6 MX9 75801201 3Pol AMP Male PCB Conn. Straight with lockTYCO

3 MX1 MX7 MX8 75800201 4Pol Picoflex Straight PCB Conn. 1.27mm MOLEX1 MX3. 75800601 6Pol Picoflex Straight PCB Conn. 1.27mm1 MX11. 75801101 8Pol Picoflex Straight PCB Conn. 1.27mm

1 MX2. 75800301 12Pol Picoflex Straight PCB Conn. 1.27mm1 MX4. 75800701 14Pol Picoflex Straight PCB Conn. 1.27mm1 IC16. 72000101 M27C1001-70F1 DIP32\600 IC EPROM 128Kx8 bit

70nS1 IC7. 72000201 W27E040-12Z DIP32\600 IC EPROM 512Kx8bit

120nS18 S1 S2 S3 S4 S5 S6 S7 S8 S9

S10 S11 S12 S13 S14 S15 S19S20 S21

36302001 Digitast Bottom Part EAO Switch 96-323.837 SERU

2 A18 A19 36309201 Cap button push without LED NCS S 1002-Y grey EAO1 S19 36309301 Cap button push without LED NCS S 0530-Y10R yellow

EAO

4 S4 S5 S6 S7 36307101 Cap button push 1 LEDprepared

NCS S 1002-Y grey EAO

7 S8 S10 S11 S12 S13 S14 S15 36307201 Cap button push 2 LEDprepared

NCS S 1002-Y grey EAO

1 S3 36307301 Cap button push 1 LEDprepared

NCS S 1050-Y40R orangeEAO


NCS S 3050-R80B blueEAO


NCS S 3060-R red EAO


NCS S 5040-B60G greenEAO

23 D2 D3 D4 D5 D6 D7 D8 D9 D10D11 D12 D13 D14 D29 D30 D31D32 D33 D34 D35 D36 D37 D56

71700101 TLHY4401 Yellow Ø3mm LED Vishay


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4 R141 R202 R203 R246 70121901 Temperature sensor PT1000 Resistor Class C IST1 R46. 70100201 0R Resistor VISHAY1 R36. 70100101 22K 5% 0.35W Resistor Vishay4 P1 P9 P12 P15 73400101 4K70 PP12 Lin. Single Potentiometer rotary

control2 P8 P11 73400301 4K70 PP12 Log. Single Potentiometer rotary

control

1 P2. 73400201 10K T10FH enclosedhorizontal Trim potentiometer ACP

1 LS1. 76300501 Micro buzzer W/OscillatorB26

Buzzer MEB-12C-53100Hz - 5V

1 S18. 51000301 PCA IA XA4 Board (Clickfree)

With screw and wire

1 IC78. 72701001 GAL18V10B Mark: LOKE 1 IC Programmed DIP204 A10 A11 A21 A27 35500201 Ø3.5xØ7x0.5 flat Washer etronit IIQ brown2 A28 A29 35400101 M3x2.4 hex nut Nut steel zinc plated19 MP0 MP00 MP000 MP1 MP2

MP3 MP4 MP5 MP9 MP10 MP11MP12 MP13 MP14 MP15 MP16

MP17 MP18 MP19

74000101 Testpin RTM 1.3mm PCB Testpin for pcb

2 N9 10 74000101 Testpin RTM 1.3mm PCB Testpin for pcb


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LED Board Diagram

Document Number

Title

Organization

Interacoustics a/s

xd di 0006 00001

AD229 Led Board

GNDVref-Vu

VDD-Vu

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

Vref-Vu

GND

VDD-Vu

GNDGND

MX1

12345678

GND

VDD-VuVDD

D15 R27 82R5

GND

R26 82R5D12

D14

D13

VDD

D16

D17

GREEN

Orange

Vu-Meter

GREEN

Tone CH1

Green

RED

Pat. Response

GREEN

RED

GREEN

RED

GREEN

GREEN

GREEN

VDD-Vu

GND

GND

VDD-Vu

GND

VDD-Vu

GND

VDD-Vu

GND

VDD-Vu

GND

GND

VDD VDD-Vu

VDD-Vu

GND

VDD-Vu

VDD-Vu

VDD-Vu

VDD-Vu

GND

GND

GND

GNDGND

IC2ATS914

3

21

4

1 1

IC2DTS914

12

1314

4

1 1

IC2CTS914

10

98

4

1 1

IC2BTS914

5

67

4

1 1

IC3CTS914

10

98

4

1 1

IC3BTS914

5

67

4

1 1

IC3ATS914

3

21

4

1 1

IC3DTS914

12

1314

4

1 1

IC1DTS914

12

1314

4

1 1

IC1ATS914

3

21

4

1 1

IC1B

TS9145

67

4

1 1

IC1CTS914

10

98

4

1 1

C2

100nC3

100n

R88K66

R49K76

R210K7

R20

20K

R1410k

R1230K1

D11LL4148

C1

100n

R1

178

R257K15

R2315K4

R219K09

R188K06

R1610K5

R1313K3

R107K5

R19

178

R15

178

R17

178

R11

178

R9

178

R3

178

R7

178

R22

178

R24

178

GND


30/65


Component Index and Values

Component Index and Values

D01004501

D01004601


31/65

GND_FF2

GND_Left

GND_Bone

FF2

FF1

INS

BONE

RIGHT

LEFT

GND_Left GND_Right GND_BoneRIGHT BONE

GND_FF1 GND_FF2 GND_INS INS

REMOTE

PAT_RES

PAT_RES

LEFT

FF1 FF2REMOTE

GND_FF1

GND_INS

GND_Right

+5V

+5V

+5V

Chassis

Chassis Chassis ChassisChassis

ChassisChassisChassisChassis

Left Right Bone Pat.Response

RemoteInsertMask.FF2FF1

Mainboard: MX1

Mainboard: MX2

J1

J21

J3

J9

J7

J8

Presskrue-3mm

C16100pC16100p

C4100pC4100p

J10Phonejack Stereo SWJ10Phonejack Stereo SW

C2100pC2100p

C14100pC14100p


C522nC522n

C1722nC1722n


C722nC722n

C1922nC1922n


C322nC322n

C1522nC1522n


CO4

4pol

CO4

4pol

1

2

3

4


N1N1

CO3

12pol

CO3

12pol

1

2

3

4

5

6

7

8

9

10

11

12

C122nC122n

C1322nC1322n


C6100pC6100p

C18100pC18100p

N2N2

C822nC822n


C2022nC2022n


32/65


Components Index and Partlist

Quantity Part Reference Part Number Value Tolerance

12 C1 C3 C5 C7 C8 C9 C11 C13 C15 C17 C19C20

60658 22n 10%

6 C2 C4 C6 C14 C16 C18 59751 100p 1%1 CO1 42255 6pol2 CO2 CO4 42455 4pol

1 CO3 42459 12pol1 CO5 42425 2pol11 J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 60120 Phone jack Stereo SW


33/65

Chassis

ChassisChassis Chassis

Chassis Chassis Chassis Chassis Chassis Chassis

Power UPS

RS232 MTP10PRINTER

CD2 CD1

3 5 2Mainboard:RC3

Mainboard: MX6

Mainboard: MX4+5

CO2

16pol

CO2

16pol

1 2 3 4 5 6 7 8 9 1 0

1 1

1 2

1 3

1 4

1 5

1 6

C30 1nC30 1n

C39 1nC39 1n

CO525polCO525pol

1 3

2 5

1 2

2 4

1 1

2 3

1 0

2 2

9 2 1

8 2 0

7 1 9

6 1 8

5 1 7

4 1 6

3 1 5

2 1 4

1

3 1

3 0

C4 22nC4 22n

J2Phono

J2Phono

C25 1nC25 1n

C46 1nC46 1n

CO4

14pol

CO4

14pol

1 2 3 4 5 6 7 8 9 1 0

1 1

1 2

1 3

1 4

R1

NP

R1

NP

C42 1nC42 1n

C37 1nC37 1n

N4N4N2N2

C24 1nC24 1n

C18 1nC18 1n

C23 1nC23 1n

C32 1nC32 1n

C41 1nC41 1n

C28 1nC28 1n

C1 1nC1 1n

C7 1nC7 1n

C10 1nC10 1n

C13 1nC13 1n

C16 1nC16 1n

C19 1nC19 1n

C26 1nC26 1n

C35 1nC35 1n

C44 1nC44 1n

C3 1nC3 1n

C21 1nC21 1n

C8 1nC8 1n

C11 1nC11 1n

C14 1nC14 1n

C17 1nC17 1n

C20 1nC20 1n

C29 1nC29 1n

C38 1nC38 1n

C5 1nC5 1n

C9 1nC9 1n

C12 1nC12 1n

C15 1nC15 1n

C45 1nC45 1n

C6 22nC6 22n

C40 1nC40 1n

CO1

4pol

CO1

4pol

1 2 3 4

C33 1nC33 1n

C31 1nC31 1n

R2

NP

R2

NP C2 22nC2 22n

J1Phono

J1Phono

C27 1nC27 1n

C22 1nC22 1n

N3N3

C36 1nC36 1n

CO69polCO69pol

1 2 3 4 5 6 7 8 9

1 0

1 1

C34 1nC34 1n

C43 1nC43 1n

CO79polCO79pol

1 2 3 4 5 6 7 8 9

1 0

1 1


34/65


Component Index and Partlist

Quantity Part Reference Part Number Value Tolerance

43 C1 C3 C5 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16

C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38C39 C40 C41 C42 C43 C44 C45 C46

66241 1n 10%

3 C2 C4 C6 60658 22n 10%1 CO1 42455 4pol1 CO2 42461 16pol1 CO3 42456 6pol1 CO4 42460 14pol1 CO5 65898 25pol2 CO6 CO7 62179 9pol2 J1 J2 66584 Phone Jack


35/65


Fuse PCB

Fuses:2x 1A 125V Slo-Blo part number 636008011x 2A 125V Slo- Blo part number 63601001


36/65


Calibration Procedure

Service, adjustment and repair

This instrument can be serviced, adjusted and repaired without losing the validity of the CE-marking provided themeasuring equipment used is fulfilling the demands below, the adjustment procedures are followed and the personnelis having the necessary qualifications approved by Interacoustics.

Equipment for adjustment

In order to assure correct calibration of the audiometric equipment, it is important that the necessary measuringequipment is used and that it is reliable and stable.

Minimum requirements for measuring equipment:

− Measuring amplifier with input for condenser microphone or a sound level meter, fulfilling the demandsof IEC 651 Type 1.

− Acoustical coupler, 6cc and 2cc fulfilling the demands of IEC 303 and IEC 126.− 1” pressure field condenser microphone for the above mentioned couplers, fulfilling the demands of

IEC 1094-1.

− Artificial mastoid fulfilling the demands of IEC 373.− Furthermore it is recommended to have an acoustic calibrator for the control of the complete measuring

chain.

− General purpose frequency counter.− General purpose digital multimeter.

In order to be able to trace and monitor the signals it will be convenient also to have an oscilloscope.

Hardware Calibration

The calibration of AD229 is separated in two parts, a hardware calibration and a software calibration (sound leveladjustment and modification register adjustment).

While keeping shift and Talk Forward buttons down, switch on power on the rear panel of the instrument. The AD229is now in software calibration menu. Wait 3 minutes, while the instrument stabilises.

All measuring points (MP) and potentiometers(P) are located on the main board, and measurements are made withreference to MP0 or MP000 (GND) See Main board index page 22

Calibration of Attenuator in channel 1

Select software calibration(see description above).Select shift - Ext Range and the AD229 will turn to attenuator calibration menu. The display will show:

1. Connect an AC voltmeter to MP4 and notice the output V1.

2. Connect the AC voltmeter to MP14.

3. Adjust P3 until the AC voltmeter shows exactly 20 dB more than V1. Notice the output V2.

4. Press Frequency Decr. and the display will show:

0 dB on channel 1* step(s)

-60 dB on channel 1* step(s)


37/65


5. Adjust P4 until the AC voltmeter shows exactly 60 dB less than V2.


Notice: Point 7 can only be done using an AC voltmeter with 1000 Hz band pass filter.

7. Press Intensities Decr. or Incr. in channel 1 until the AC voltmeter with 1000 Hz Filter shows exactly120 dB less than V2. ( * = number of steps, max ± 8 steps).

8. Press Store.

Calibration of Attenuator in channel 2

9. Press Intensities Decr. or Incr. in channel 2 and the display will show:

10. Connect an AC voltmeter to MP5 and notice the output V3.

11. Connect the AC voltmeter to MP15.

12. Adjust P5 until the AC voltmeter shows exactly 20 dB more than V3. Notice the output V4


14. Adjust P6 until the AC voltmeter shows exactly 60 dB less than V4.


Notice: Point 16 can only be done using an AC voltmeter with 1000 Hz band pass filter.

16. Press Intensities Decr. or Incr. in channel 1 until the AC voltmeter With 1000 Hz Filter shows exactly120 dB less than V4. ( * = number of step max ± 8 step).

17. Press Store.

To leave the hardware calibration and return to normal mode Activate shift Intensity Decr. in channel 2 ( off ) twice.

LCD angle adjustment

Adjust by means of P2 the LCD angel on the display to a suitable readability.

Speech Input Amplif ier Adjustment .



0 dB on channel 2* step(s)



38/65


1. Connect a sine wave generator pre-selected to 1000 Hz 100 mV to the Tape 2 socket on the rear-plate.

2. Select Tape 2 on the operation panel.

3. Connect a AC millivoltmeter to MP10.

4. Adjust Tape 2 level potentiometer on operation panel until the AC millivoltmeter shows 200 mV.

5. Adjust P10 until the Vu-meter shows 0 Vu.

6. Change the sine wave generator output level to 1000 Hz 10 mV.

7. Adjust Tape 2 level potentiometer on the operation panel to maximum.

8. Connect a AC millivoltmeter to MP10 and notice the output V1.


10. Connect a AC millivoltmeter to MP18 and adjust P13 until the AC millivoltmeter shows exactly V1.


12. Change the sine wave generator output level to 1000 Hz 3.0 Volt.

13. Adjust Tape 2 level potentiometer on operation panel until the Vu-meter shows 0 Vu.

14. Connect a AC millivoltmeter to MP10 and notice the output V2.


16. Connect a AC millivoltmeter to MP18 and adjust P14 until the AC millivoltmeter shows exactly V2.


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Talk Forward Sensitivi ty

1. Press Talk Forward.

2. Adjust P7 to the suitable level for 0 VU-meter.

Software Calibration

General Description

Before the calibration begins, the Set-up Items “Bone Type”, “Speech Standard” and “Speech Filter” in the Set-upmenu must be set to a correct value (see the set-up item numbers on page AD229e Appendix B1)To enter the Set-up menu hold down shift while activating the Pulse key.To get into Calibration menu, hold down shift while activating Talk Forward, when the instrument is powered up, untilthe display shows “ Welcome to the AD229 Calibration “. The AD229 will now be in calibration mode.Select the output that has to be calibrated.Connect the output to an artificial ear or mastoid (Air or Bone), or 2ccm coupler.To leave the Set-up menu or the Calibration Menu, hold down shift while turning Decr. on channel 2 (off ).

What to do

1. Select the output to be calibrated(Phone Right/Phone Left/Bone Right(PLS)/Bone Left(=Insert Masking)/Insert phone Right/ Insert PhoneLeft,FF1/FF2).To select Insert Phone hold down shift while activating Right or Left

2. Select input (Tone/Narrow Band/White Noise/Speech/Speech noise) by activating the channel 2Intensity Keys.

3. Follow the procedure as described below for the selected inputs.

Tone Calibration

See General Description above and select Tone by activating the Channel 2 Intensity Keys.

1. Select by means of Frequency Incr./ Decr. the frequency that is to be calibrated.

2. Activate Intensity Incr./Decr. channel 1 until the desired sound pressure level has been achieved.

3. Activate STORE.

4. Go to point 1 until all frequencies have been calibrated.

5. Select a new output(Phone Right/Phone Left/Bone Right (PLS) /Insert phone Right/ Insert Phone Left, FF1, FF2)and repeat point 1-2-3-4.

Narrow Band Calibration

See General Description above and select NB by activating the Channel 2 Intensity Keys.Follow the procedure from Tone Calibration point 1-2-3-4-5.NOTICE! When a new output is selected it is necessary to select NB again.


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White Noise Calibration

See General Description and select WN by activating the Channel 2 Intensity Keys .1. Activate Intensity Incr./Decr. channel 1 until the desired sound pressure level has been achieved.

2. Activate STORE.

3. Select a new output(Phone Right/Phone Left/Insert phone Right/ Insert Phone Left, Bone Left (=Insert masking), FF1, FF2).

4. Select WN and repeat 1 and 2.

Speech Calibration

See General Description and select Speech by activating the Channel 2 Intensity Keys.

1. Connect a sine wave generator or Tape/CD to Tape 1 socket on the rear panel.

2. Adjust Tape 1 volume on the operation panel until the VU meter indicates 0dB.


4. Activate STORE.

5. Select a new output(Phone Right/Phone Left/Insert phone Right/ Insert Phone Left, Bone Right, FF1, FF2).

6. Select Speech and repeat 3 and 4.

Speech Noise Calibration

See General Description and select Speech noise by activating the Channel 2 Intensity Keys .


2. Activate STORE.

3. Select a new output(Phone Right/Phone Left/Insert phone Right/ Insert Phone Left, Bone Left (=Insert masking) , FF1, FF2).

4. Select SN and repeat1 and 2.

Hold down shift while turning Intensity Decr. in channel 2 ( off ) to leave the software calibration


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AD229e Service Manual Appendix A page 1

Appendix A Description of the RS232 Interface version 2.00

General Specification

The RS232 interface is designed to transmit data from the audiometer to a computer, and to control the audiometerfrom a computer.

Pin Connection

The following pins on the RS232 socket are used:

Plug for computer (25 pins) Plug for audiometer (9 pins)Pin number: Pin number:

2 Received data (RXD) 33 Transmitted data (TXD) 25 Clear To Send (CTS) 86 Data Set Ready (DSR) 67 Signal Ground 5

20 Data Terminal Ready (DTR) 4

Logic Levels

Data:Mark: "1" = -12 volt

Space: "0" = 12 volt

Control:On: = 12 volt

Off: = -12 volt

Data Format

Data transmitted to the audiometer is and must be asynchronously and consist of:

1 start bit

8 data bits

1 parity bit

2 stop bit even parity is used

The baud rate can be selected internally ( by use of set-up ) between the following values:9600,19200,38400 B/S.


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Control Wires

The DSR pin is always ON when the RS232 cable is connected.The pins DTR and CTS is used for handshake in the following way:

The Computer wants to transmit data to audiometer.1. If the CTS is OFF no data transmission is possible.2. If the CTS is ON 1 byte can be transmitted.3. The audiometer will send an Acknowledge pulse on the CTS (lowgoing) on app 0.5 mS when the byte is

received.

The audiometer wants to transmit data to the computer.1. If the DTR is OFF, no data transmission will take place.2. If the DTR is ON 1 byte will be transmitted.3. The audiometer will wait for an Acknowledge pulse on the DTR (lowgoing) which must be at least 0.5 mS.

Transmission. Figure 1.


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Communication

RS 232 Standard for Interacoustics A/S

Both the computer and the instrument can send out a request for information or send back requested information. Tomake it easier to understand how the philosophy behind the RS232 communication standard works for an instrumentand a PC the following terms will be used. The part that request information will be called a Master and the part whowill send back requested information will be called a Slave.

Master/slave communication. Figure 2

Data transmission between the Master and the Slave are using the following format.

Data packet from a Master device.

Recipient Sender Direction Header Data

Data packet from a Slave device.

Recipient Sender Header Data

“Recipient” and “sender” are revered for later use and can be ignored. Both the Recipient and the Sender areconsisting of two bytes each.

A data packet form a Master will always contain a Direction. This direction tells the slave if it has to store or to sendout the kind of data the header describes. The header is an indicator for the type of data and how the are transmitted.

Control Codes

All information’s in the transmission between a Master and a Slave are controlled by control codes (see table 1).

Code Hex Descript ion Code Hex Descript ion

STX 02 Start of TeXt GS 1D Group SeparatorEOT 04 End Of Transmission RS 1E Record Separator

SOH 01 Start Of Header SI 0F Shift InUS 1F Unit Separator SO 0E Shift Out

Control Codes. Table 1.

A datapacket from a Master will look like this with all it’s control codes :

STX Recipient US Sender US Direction SOH Header US Data EOT

Direction can either be SO or SI. If It is a SO (shift out) direction the Master wants to send data into the slave and if itis a SI (shift in) direction the Master wants to receive data.A datapacket from a Slave will look like this with all it’s control codes :

STX Recipient US Sender US SOH Header US Data EOTNote ! When a Master is using a SO direction the slave will send back nothing !

Each time data is transmitted a US control code is added. Ex. 10 US 125 US .... With this construction it is alwayspossible to see when all bytes in a single data transmission is completed.

Master Slave

RS232communication


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Header and Data Formats

A header consists of a control code (SOH) and 6 byte (header). Each header tells witch kind of data that follows andhow the data format is. The following table describes the different types of headers and their data format.

Audiological Informat ion

Speech Audiogram

Header Descript ion Format

GSF100 Free Field 1 dB US % US dB US .. GS M/N US RS dB US % US ......GSF200 Free Field 2 dB US % US dB US .. GS M/N US RS dB US % US ......GSFF00 Reference curve for Free Field dB US % US dB US % US...GSLB00 Left Bone dB US % US dB US .. GS M/N US RS dB US % US ......GSLP00 Left Phone dB US % US dB US .. GS M/N US RS dB US % US ......GSLP01 Left Phone UCL dB USGSLR00 Reference curve for phones dB US % US dB US % US...GSRB00 Right Bone dB US % US dB US .. GS M/N US RS dB US % US ......GSRP00 Right Phone dB US % US dB US .. GS M/N US RS dB US % US ......

GSRP01 Right Phone UCL dB USSpeech data. Table 2

Tone Audiogram

Free Field 1


GTF100 Hearing Level frequency US dB US frequency US ....GTF105 Masking frequency US masking US frequency US ....

Free Field 1. Table 3

Free Field 2


GTF200 Hearing Level frequency US dB US frequency US ....GTF205 Masking frequency US masking US frequency US ....

Free Field 2. Table 4

Insert Masking


GTIM00 Hearing Level frequency US dB US frequency US ....GTIM05 Masking frequency US masking US frequency US ....

Insert Masking. Table 5

Left Bone


GTLB00 Hearing Level frequency US dB US frequency US ....GTLB05 Masking frequency US masking US frequency US ....

Left Bone. Table 6


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Left Phone


GTLP00 Hearing Level Frequency US dB US frequency US ....GSLP01 Left Phone UCL Frequency US dB US frequency US ....GTLP05 Masking Frequency US masking US frequency US ....

Left phone. Table 7 Right Bone

Header Descript ion FormatGTRB00 Hearing Level Frequency US dB US frequency US ....GTRB05 Masking Frequency US masking US frequency US ....

Right phone. Table 8

Right Phone


GTRP00 Hearing Level Frequency US dB US frequency US ....GSRP01 Right Phone UCL Frequency US dB US frequency US ....GTRP05 Masking Frequency US masking US frequency US ....

Right phone. Table 9

Test Results

Hughson/Westlake Test

To get stored data from the Hughson/Westlake test it is necessary to use the headers for LEFT and RIGHT (GTLP00and GTRP00). This has to be so because the data from the Hughson/Westlake test is stored in the same place as thenormal data.

Bekesy Test


ATBL00 Bekesy test - left tone Tone Type* US L/H* US M/F* US Freq US dBUS... GS Tone Type* US L/H* US M/F* USFreq US dB... etc.

ATBR00 Bekesy test - right tone Tone Type* US L/H* US M/F* US Freq US dBUS... GS Tone Type* US L/H* US M/F* USFreq US dB...etc.

ATBL01 Bekesy test - left average tone L/H US Freq US dB US Freq US dB US…. GSL/H US Freq US dB...

ATBR01 Bekesy test - right average tone L/H US Freq US dB US Freq US dB US…. GSL/H US Freq US dB

ATBA00 Bekesy Average left phone continuos tone Stimuli* US Masking* US Freq US dB US FreqdB US …

ATBA01 Bekesy Average right phone continuos tone Stimuli* US Masking* US Freq US dB US FreqdB US …

ATBA02 Bekesy Average left phone pulse tone Stimuli* US Masking* US Freq US dB US FreqdB US …

ATBA03 Bekesy Average right phone pulse tone Stimuli* US Masking* US Freq US dB US FreqdB US …

ATBA04 Bekesy Average FF1 continuos tone Stimuli* US Masking* US Freq US dB US FreqdB US …

ATBA05 Bekesy Average FF2 continuos tone Stimuli* US Masking* US Freq US dB US FreqdB US …

ATBA06 Bekesy Average FF1 pulse tone Stimuli* US Masking* US Freq US dB US FreqdB US …

ATBA07 Bekesy Average FF2 pulse tone Stimuli* US Masking* US Freq US dB US FreqdB US …Bekesy test. Table 10

Stimuli can be Warble (1502), Tone (1501) or Narrow Band Noise (1503).Masking can be nothing (12), fixed (13) or synchronised (14).


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Bekesy Test Categorisation


ATBC00 Receive Bekesy Categorisation's old audio-gram

Age US MSLT* US Right Side* US Left Side*

ATBC01 Send Bekesy Categorisation’s result Right Low* GS Right High* RS Left Low* GSLeft High* US

Bekesy test. Table 11

ATBC00:

MSLT is Month since Last Test.

The sides have 6 fixed frequencies where dB values have to be filled in.

Right Side : 500 US dB US 1000 US dB US 2000 US dB US 3000 US dB US 4000 US dB US 6000Left Side : 500 US dB US 1000 US dB US 2000 US dB US 3000 US dB US 4000 US dB US 6000 US

ATBC01:

Values for Right Low, Right High, Left Low and Left High are 1,2,3/4 or 5. Depending on the test result 1 and/or 2and/or 3/4 can be send back for each of the 4 categorises mentioned above.

Information


GDID00 Identification of RS232 version data USGDID01 Brand name and version Brand name US Program Version USGDID02 DSP program version data USGDID04 Instrument name and version AD229e US Program Version US

Information. Table 12

Difference on GDID01 and GDID04 is that GDID01 returns with the brand name that can be changed by user andGDID04 always return with the same name.

Controlling the AD229

It is possible to remote the AD229 from the computer via the RS232 link with different commands. One of thecommands is SPKY00 - the set key command.

Set Key Command

Keys, special keys and menu’s has each a specific number that can be overruled by the RS232 link. In the following

all available codes are shown and the syntax for SPKY00 is shown below.


SPKY00 Remote command for the AD229 Code USSet key command. Table 13

Keys are grouped the following way :


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Key

Key name Code Key name Code Key Name Code

CD/Tape 0 Incorrect/Hz decr 26 SISI 67Microphone 1 Correct/Hz incr 27Tone/warble 2 dB decr Ch2 28 No Response 69Autotest 3 dB incr Ch2 29 Print 70Synch. 4 dB decr Ch1 30Extended Range 5 dB incr Ch1 31 UCL/HL 81Left 6Right 7 Langenbeck 45 Tape 1 and 2 97

Monitor/TB 9 Off 50Stenger/ABLB 10Free Field 11 Delete 541/5 dB 12Manual/Reverse 13 Familiarisation 56Single/MultiPulse

14

Bone 15 Headset Left 59Headset Right 60

Store 25Key codes. Table 14

Other Remote Commands

Beside the SPKY00 command there are other possibilities to control the AD229. With the following commands thefrequency, intensity and interrupter for both channel can be set .


SPF100 Set frequency for both channels freq1 US freq2 US freq3 US.....SPA100 Set attenuator for channel 1 dB1 US dB2 US dB3 US.....SPA200 Set attenuator for channel 2 dB1 US dB2 US dB3 US.....SPI100 Set interrupter for channel 1 “1” is on and “0” is off

SICP01 Delete all patient dataSICP02 Reset to power-up menuSPA101 An add-on calibration value for automatic

calibration.Calibration value US…

Other remote commands. Table 15

AD229 Status

The AD229 can transmit different status information


SGTS00 Total instrument status Struct Ch1 GS struct Ch2 GS Key US GS Pat.Resp Left US Pat. Resp Right US GSInterrupter Ch1 US Interrupter Ch2 US

SGSS00 Stored instrument status dB level Ch1 US dB level Ch2 US frequencyUS Speech % normal US Speech % storedUS Store Flag US Pat. Resp. Left US Pat.Resp. Right US Interrupter Ch1 US InterrupterCh2 US.

SGRS01 Reduced instrument status Ch1 intensity US -15(Ch2 off)/Ch2 intensityUS Ch1 Frequency US Ch1 input US Ch1output US discrimination US store flag US

SGGA00 Send all stored data Returns with all data stored. Look for headersin the return string and see in this manual for

format description.SGME00 Menu Status Active Menu US Submenu US

Status information’s. Table 16


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struct Ch1 and struct Ch2 Intensity dB level US frequency US input* US phase* US output* US Bone side* US FF side* US discrimination USextended range extern US extended range intern* US stored discrimination

Bone side is '0' if Bone Left is active, and '1' if Bone Right is active.FF side is '0' if FF2 is active, and '1' if FF1 is active.

Extended range internal is '1' if the +20 dB step is active in the audiometer but not displayed on the Extended rangeKey.

Key

Warble US Multifrequency US Multi pulse US Synch US Sim US Alt US Man Ch1 US HL US Single Pulse US Five dBUS Man Ch2 US Store Flag US Talk Back US Monitor Ch1 US Monitor Ch2 US.

The value for the key is ‘1’ if active and ‘0’ if not active.

In struct Ch1 and struct Ch2 three types of data occurs : Input, phase and output. Each one represents a part of theway the signal is gated in the AD229 and is represented by a code

Input

Input Channel 1 Code Input Channel 2 Code

Pure Tone 100 Pure Tone 120Warble 106 Warble 126CD1/Tape1 109 Speech Noise 122CD2/Tape2 110 Narrow Band Noise 123Mic 111 White Noise 124CD12/Tape12 112 Channel 2 Off 128

CD1/Tape1 129CD2/Tape2 130Mic 131

Input codes Table 17.

Output

Output Channel 1 Code Output Channel 2 Code

Phone Left 141 Phone Left 161Phone Right 140 Phone Right 160Insert Left 143 Insert Left 163Insert Right 142 Insert Right 162FF1 146 FF1 166FF2 147 FF2 167Bone Right 171

Bone Left 144 Insert Masking 165Output codes. Table 18


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List of menus and submenus.

Active Menu Code Submenu Code

Tone Menu 101 ABLB 116Speech Menu 102 Stenger 117Setup Menu 108 Langenbeck 118Bekesy Test 121Bekesy Trainer 122OSHA 126OSHA Trainer 127H.W. Test 103H.W. Trainer 104SISI 112Master Hearing Aid 128Show Data 109

Menu codes. Table 19

EEPROM control

It is possible to read and write the hole EEPROM using the command GDE100. If stored in a file the size will be about

4 Kbytes. Be aware that calibration values and set-up data are stored in the EEPROM. These data will be overwrittenwhen data is transmitted back into the AD229.


GDE100 EEPROM data Data1 US Data 2 US ......EEPROM control command. Table 20

Programming Tips

Interacoustics RS232 Utility Program

A test program running under WINDOWS from version 3.1, called “Coupler”, has been made for testing the RS232functions. Further more, with this program, the NAME of the instrument and some other "fixed" parameters can be set.


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AD229 OnLine

It is possible to control the AD229 Online. The following steps is an example of how it can be done.

1. Init the instrument using the SPKY00 Header.2. Use the SGRS01 to get running information about the status of the instrument.3. if the store flag in the SGRS01 shows “1”, send a SGGA00 header in order to get all stored data.4. repeat from point 2.

An example of this has been made in our PrintView program. This program runs under Window 3.11 or higher andcan view online data from one of our instruments and make a print out of a desired menu.

Examples of Transmission

All ASCII characters are separated form control codes with “ “ ! Ex. “00” means two byte each representing a zero.

Ex. 1 Transmit ting all EEPROM data from the AD229

Master STX “00” US “00” US SI SOH “GDE100” US EOT Ask for EEPROM data.

Slave : STX “00” US “00” US SOH “GDE100” US data............. EOT Send EEPROM data.

Ex. 2 Sending all EEPROM data from to AD229

Master STX “00” US “00” US SO SOH “GDE100” US data....... EOT Send EEPROM data

Slave : Nothing.

Ex. 3 Setting a key or menu in the AD229

Master STX “00” US “00” US SO SOH “SPKY00” US “101” US EOT Switch to Tone audiogram

Slave : Nothing

Ex. 4 Getting all relevant subject data from the AD229

Master STX “00” US “00” US SI SOH “SGGA00” US EOT Ask for all data

Slave : STX “00” US “00” US SOH “SGGA00” US data............. EOT Send relevant data.

Ex. 5 Getting data - left phone from the AD229

Master STX “00” US “00” US SI SOH “GTLP00” US EOT Ask for data

Slave : STX “00” US “00” US SOH “GTLP00” US data............. EOT Send relevant data.


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Window Rout ines in C++

In the following you will find C++ code for the PC that shows how we handle the RS232 transmission in the PC. Thefirst function is how we transmit data to the instrument. The code is compiled with a Visual C++ 4.2 compiler as a 16bit program.

Note this line “modem_status += 35;”. It gives the address of the modem status register for monitoring communicationsignals. Without this the communication will not work properly.

Transmit Data from PC to Instrument

IaRs232Transm(int idComDev,char FAR* source,DWORD num)

{unsigned int i;int RetVal;char FAR * modem_status;long millisec;

modem_status = (char FAR *) SetCommEventMask(idComDev,0);modem_status += 35; // this is the address of the modem_status register

SetCommEventMask(idComDev,EV_CTS);

for( i =0; i < num; i++,source++){

millisec = GetTickCount();while( GetTickCount() - millisec < 5000 ) // Wait max 5 sec on CTS{

if ( *modem_status & 0x10 ) // CTS is bit 4 in modem_status registerbreak;

}

if ( !(*modem_status & 0x10 )) // CTS was not on

return(FALSE);

GetCommEventMask(idComDev,EV_CTS); // Reset "CTS"

WriteComm(idComDev,source,1); // Transmit 1 char

RetVal = FALSE; // Wait til CTS will go Lowmillisec = GetTickCount();

while( GetTickCount() - millisec < 5000 ){

if ( GetCommEventMask(idComDev,EV_CTS) == EV_CTS ){

RetVal = TRUE;break;

}}

if ( RetVal == FALSE )return(FALSE);

}

return(TRUE);

}


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Receive Data from Instrument

In the following you will find our receiving routine.

IaRs232Receiv(int idComDev,char FAR* dest,unsigned int max)

{

unsigned int i,first = 0,NrOfByte;long millisec;COMSTAT comstat;

*dest = 0;NrOfByte = 0;

while(1){

millisec = GetTickCount();

while( GetTickCount() - millisec < 10000 ) // try in 3000 mSec{

GetCommError(idComDev,&comstat);if (comstat.cbInQue > 0 )break;

}

if (comstat.cbInQue == 0 )return(FALSE);

ReadComm(idComDev,dest,1);

if( NrOfByte == max )return(FALSE);

NrOfByte++;first = 1;

for( i=0;i < DTROFF;i++) // AcknowledgeEscapeCommFunction(idComDev,CLRDTR);

EscapeCommFunction(idComDev,SETDTR);

if ( !(*dest == EOT || *dest == CR))dest++;

else{

for( i=0;i


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AD229e Service Manual Appendix B page 1

Appendix B Setting of Set-up items in AD229 Extended

Introduction

To Enter the Set-up

Hold down "shift" while activating the Pulse Key

The LCD display will now show:

Activating the Intensity Increase/Decrease in channel 2 can change the Set-up item number. Activating the IntensityIncrease/Decrease in channel 1 can change the contents of the Set-up item. To set all items to their previous settingin one action hold down "shift" while activating the Synchr. Key when the AD229 is in calibration mode.

To Leave the Set-up

Hold down "shift "while turning the HL dB Increase / Decrease Key channel 2, or hold down "shift" while activating thePulse key.

Restoring one Set-up item

AD229 remembers the previous setting of a Set-up item. Hold down "shift" while activating the Synchr. Key when theAD229 is in the Set-up menu. This action will restore the Set-up item to what it was before it was changed.

Setup Items

In the following all set-up items will be shown with the factory set-up.

Set-up Item 1 Baudrate

Is used to select the Baudrate (RS232 transmission speed) from 9600-19200-38400.

Set-up Item 2 Handshake

Is used to turn Normal/Special the handshake control between a PC and the instrument. Handshake is used withRS232 communication in order to make the flow of data correct. In some cases the computers requires this option tobe “Special”.

Welcometo AD229 Set-up

Set-up Item 1Baudrate : 38400

Set-up Item 2Handshake : Normal


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AD229e Service Manual Appendix B page 2

Set-up item 3 CRC Check

Is used increase safety level when transmitting data via the RS232 link. Contact Interacoustics A/S for moreinformation about the CRC algorithm and use of the feature. Default setting is Normal.

Set-up Item 4 Frequency Deactivation in Auto Test

Is used to disable one or more of the following frequencies: 125 Hz, 250 Hz, 750 Hz, 1500 Hz, 8000 Hz. Thefrequencies can be selected by activating the frequency Keys.

Set-up Item 5 Frequency Deactivation in Manual Threshold

Is used to sele

interacoustics_ad229e_service_manual_complete.pdf

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