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LBN200 RFoG ONU

User Manual

LBN200 April 2013_rev1

I

LBN200 RFoG ONU

User Manual

Table of Contents

Section & Description Page

1.0 Product Description……………………………………………....….1

2.0 Safety Notes….……………………………………………………......2

3.0 Block Diagram………………………………………………………...3

4.0 Specifications...............................................................................4

5.0 RF Connector Installation.......................................................….5

6.0 Power Connector Installation......................................................5

7.0 AC Power Director........................................................................6

8.0 General Set Up………………………………………………………..6

9.0 Forward Path Set Up……………………….………………….…….7

10.0 Reverse Path Set Up………..……..………………………………..9


1.0 Product Description

1

The Lindsay Broadband Inc. LBN200 RFoG ONU is a

TOUGH outdoor hardened optical node offering one or

two outputs with high RF output levels, capable of up to

52dBmVwith 1 output and 48dBmV with 2 outputs at

1002MHz . Advanced GaAs-FET technology achieves

superior distortion performance to 1GHz at High output

levels with low power consumption.

Burst return lasers, one or two high level outputs, 40-

90VAC HFC or 100-240 VAC mains powered, all in a

15 P.S.I. pressure tested Die cast aluminum weather

sealed housing. Unique on board equalizer allows

slope/tilt setup by simple resistive attenuators greatly

reducing operational expenses.

The LBN200 offers flexibility in choice of wavelength,

laser types and band splits to meet all applications.

FEATURES

• High RF output level 52/48dBmV per Port for 1/2 Ports

• GaAsFET Technology superior Distortions and Low power consumption

• Downstream bandwidth: 54/85MHz to 1002MHz;

• Upstream bandwidth: 5Mhz to 42/65MHz

• Optical automatic gain control (AGC)

• Extended optical input level range (-8dBm to 0dBm) for maximum flexibility

• Burst return transmitter; 1310, 1610, or CWDM wavelengths, FP or DFB options

• Optical receiver input and transmitter output indicators and test points.

• Superior heat dissipation, die case aluminum housing

• Efficient switch mode power supply

• HFC powered 40-90VAC

LBN200 RFoG ONU

User Manual


NO SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

2.0 SAFETY NOTES

• The LBN200 employs an infrared laser device that emits invisible light,

which can permanently damage the retina of an eye.

• Avoid direct exposure to the laser light source.

• Never apply power to this product if the fiber is neither connected nor

terminated.

• Never stare directly into a fiber or at any mirror-like surface that could

reflect light emitted from an un-terminated fiber.

• Never view an active fiber through optical instruments.

2

LBN200 RFoG ONU

User Manual


3

3. Block Diagram

FIGURE 1.

LBN200 RFoG ONU

User Manual


4.0 SPECIFICATIONS

4

LBN200 RFoG ONU

User Manual


PARAMETER CONDITIONS MIN TYP MAX UNIT

Optical Wavelength Normal dual fiber nm

Optional WDM nm

Monitor Voltage 1 V/mW

Optical Input Power Optical AGC dBm

Frequency Range (optional) (Note1) 54 1002 MHz

Flatness of Frequency Response f=54 to 1000MHz ±0.75 dB

Output Return Loss 16 dB

Reference Output Level 1 Port / 2 Port dBmV

Slope 0- 18dB adjustable 12 dB

Optical Input Return Losses 45 dB

C/N 50 51 dB

CTB -65 dB

CSO -60 dB

Optical Wavelength nm

Optical Output Power Available in 1,2 or 3mW 1 2 3 mW

RF Input Level dBmV

Dynamic Input Range NPR ≥38 20 dB

Frequency Range (optional) 5 42 MHz

Flatness of Frequency Response f=5 to 42MHz ±1 dB

Input Return Loss f=5 to 42MHz 16 dB

Optical Output Return Loss 45 dB

Power at which LaserTurn ON (Note2) 10 dBmV

Power at which LaserTurn OFF (Note2) -4 dBmV

Total Power Consumption (AC)100-240VAC or

40-90VAC≤20 W

Operating TemperatureHumidity 5% to 95%, non

condensing-40 60 ℃

Width x Length x Depth in.

Width x Length x Depth mm

FORWARD RECEIVER

RETURN TRANSMITTER

GENERAL PARAMETERS

1270 ~ 1610

(-1dBm optical input,

3.5% OMI/ch, 79ch NTSC,

Digital ch above 550MHz

at -6dB offset)

20-40

1310, 1610 or CWDM

-8 to 0

48 / 52

241 x 203 x 117

1540 ~ 1565

Note 1: 42/54MHz; (Other options; 65/85MHz; 85/105MHz)

Note 2: Burst Mode parameters can be adjusted to customers request.

Physical Dimensions9.5 x 8.0 x 4.6

5

5.0 RF Connector Installation:

1. All RF connectors including the power port connector are standard KS-type connectors.

Refer to Figure 2.

2. Using a ½ inch (12mm ) wrench, remove port covers from RF ports and power port on the

housing base.

3. The center conductor seizure screws (Phillips screw) are located through the module.

Loosen, but do not remove the seizure screw.

4. Measure the stinger to verify that it is 1.0 inches (25mm). Refer to Figure 3.

5. If you are going to apply shrink tubing to weatherproof the finished connection, slip a section

of shrink tube over the end of the cable now.

6. Insert the KS connector and cable to the Housing base and tighten connector. KS connectors

should be tightened per manufacturer’s specifications.

7. Using a Philips screw driver tighten the seizure screw.

8. Position the shrink tubing over the connector and apply heat to shrink it in place.

1.0 in

(25mm)

1. The LBN200 can be powered either with 120VAC mains or HFC power supply with AC input

between 40 and 90 VAC. AC power is brought into the Node through the dedicated power port.

2. Follow “RF Connection Installation” section to install Power cable.

CAUTION! AC voltages in the range of 40 to 90 V AC. Shut down external AC power before

connecting or disconnecting power cables to the node.

6.0 Power Cable Installation:

Figure 2

Figure 3

LBN200 RFoG ONU

User Manual


6

7.0 AC Power Director:

1. AC HFC power can be sent to remote locations via the output ports by installing a plug in fuse bar.

Figure 4 has no Fuse bar, therefore does not pass power.

2. Check the system maps to determine which ports should pass power. Install each fuse bar as

required. Refer to Figure 5.

8.0 General Set-up:

1. Test the optical input power on the system downstream cable with an optical power meter to verify

that it is within the optical input range specification.

2. Clean the optical connector on the node and on the service cable and connect them together.

3. Verify that the total upstream RF signal level (from all ports) is within the node’s specified input range,

then connect the coaxial cable to the node’s RF In/Out port.

4. The LBN200 must be grounded, Use a split-bolt grounding stud or your system preferred ground

attachment to ground the Node housing to earth ground. Install the split-bolt grounding stud on the

base housing. Refer to Figure 6.

• For a strand-mounted node, install the grounding stud in the threaded hole on the base.

• For a pedestal or surface mounted node, remove one of the two strand mount brackets,

and install the grounding stud in the threaded hole.

Loosen the top nut and insert the grounding cable. (You may need to remove the nut to insert cable.

With the grounding cable installed, tighten the top nut to secure the cable.

5. Apply HFC power to the node through power port (40 – 90VAC). Verify that the “Power LED” and the

“Opt. RX” LEDs illuminate.

Figure 4

Figure 6

Figure 5

LBN200 RFoG ONU

User Manual


7

9.0 Forward Path Set-up : (Refer to Figure 7)

LBN200 RFoG ONU

User Manual

1. Using an optical power meter, measure the input optical power level at the fiber optic connector

coming into the node. The acceptable range is -8 to 0dBm.

2. Clean and install the incoming fiber connector to the forward bulkhead.

3. Using a DVM, measure and record the optical input power level at the electrical test point

(1V/mW). Verify optical input levels using Table 1.

4. Using a CATV Signal level Meter, verify the RF output levels at the -20dB test point on Output

1.

5. The Pad and Equalizer values are established by the use of JXP attenuators. The Equalizer

circuit is built on the board therefore choose a pad value to achieve your desired slope. (eg.

12dB attenuator in EQ2 will result in a 12dB output tilt between 54 and 1000MHz).

6. The LBN200 comes factory set with a 4dB pad in ATT1, 0dB pad in ATT2, and 12dB value in

EQ1 for optimum performance as per specifications. Verify and record your desired output level

and tilt. Attenuator values may be off ± 1db to slight tolerance difference between units. Use

Step 4 to verify output set up.

7. Plug in the desired Feeder Maker for the number of outputs required. Feeder Maker 100 is for

one output, 204 is for 2 outputs. While monitoring the forward Out1 test point (-20dB), with a

4db pad in ATT1 and with a 0dB pad in ATT2 position, place the pad value corresponding to the

desired output tilt into EQ2. Continuing to monitor Out1 test point (-20dB), adjust pad value in

ATT2 position for the desired output level. Verify that the level is correct at both ends of the

bandwidth spectrum. Output 1 & 2 are now set up in the Forward Path.

Table 1


Optical Level (dBm)

1V/mW Test point (± 20%)

-8.0 0.16

-7.5 0.18

-7.0 0.20

-6.5 0.22

-6.0 0.25

-5.5 0.28

-5.0 0.31

-4.5 0.35

-4.0 0.40

-3.5 0.44

-3.0 0.50

-2.5 0.56

-2.0 0.63

-1.5 0.70

-1.0 0.78

-0.5 0.88

0.0 1.00

8

Optical Transmit

Indicator and

Test Point

ATT2; Fwd RF attenuator

EQ1; Fwd Equalizer

For Port 1&2; Tilt set

with attenuator

Optical Receive

Indicator and

Test Point

Figure 7

Power indicator

LBN200 RFoG ONU

User Manual

ATT1; Fwd RF attenuator Feeder Maker

for 1 or 2

Outputs


9

10.0 Reverse Path Set-up:

LBN200 RFoG ONU

User Manual

1. The LBN200 reverse input is designed to have a wide dynamic range to accommodate most

system design levels. Your design input should be matched to align with the optimum operating

point for the node, and it can be adjusted with the controls available in the reverse path.

2. The Total RF return level at the LBN200 NODE INPUT should be 20 to 40dBmV for NPR≥38dB.

See Figure 8. The default configuration of the node (ATT3/4=2dB, ATT5=10dB, EQ2=0dB, 2-

port). The node input level can be checked at the RETURN TEST1 or RETURN TEST2 test

points adjacent to ATT3/4. See Figure 10.

3. For ANY configuration of the node the optimum LASER INPUT should be 40-60dBmV. This

level can be checked at the RETURN TEST 3 test point following ATT5.

4. If operating with a total node input of 35-40dBmV (total laser input of 55-60dBmV) then the

ATT3/4 attenuators should be changed from 2dB to 7-10dB in order to keep the operating point

to the left of the NPR peak and well way from the down slope of the curve (Figure 9).

5. When the node is first powered switch the Laser Mode switch to “NORMAL”. This will set the

laser to continuous-on mode and will let you measure its output level at the laser output test

point. Measure and verify the power in mW (1Vdc=1mW) then switch back to “BURST” mode if

you are setting up an RFoG system. If the RFoG system is already in operation then skip this

step since NORMAL mode will cause laser collisions.

6. On a default configured node, and with no RF signal present at the RF inputs you can verify the

RF signal path within the node. Using a portable RF signal generator inject a +40dBmV CW

return carrier into one of the external forward RF test points. Then measure the level at the

RETURN TEST3 test point (laser input). It should be 20dBmV at the test point, indicating

40dBmV at the laser input. And the laser LED should be on.

7. When measuring levels at the test points please remember to allow for the test point loss of

20dB. When Return verification and set up is completed make sure the Laser Mode switch is

set to “BURST” for RFoG operation.

Hints:

- For optimum operation plan to apply a total RF input level that is 2 to 4dB to the left of the peak

on the NPR vs. Input Level curve (Fig 8). This is the “operating point”. Doing so will allow

variations in the composite input power while at the same time it positions the total level safely

below the clipping region and above the thermal noise.

- Take an account of all the upstream services going into both ports of the LBN200 so that the total

lands at the Operating Point. The following equation can be used for the calculation:

Operating Point (dBmV) = 10Log(10(S1/10) + 10(S2/10) + …. + 10(Sn/10) )

(Where: S1, S2, … Sn are the dBmV levels of each upstream service)

- To help with this calculation, or to set the levels based on an equal power per Hertz basis,

www.lindsaybroadbandinc.com Resources Tab for a spreadsheet calculator.


10

Figure 9

LBN200 RFoG ONU

User Manual


Figure 8

11

Return RF -20db TP

before laser

Transmit mode Switch ATT5; Return RF

attenuator

ATT3 and ATT4;

Return RF attenuator

for Port 1&2

Figure 10

LBN200 RFoG ONU

User Manual


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