annex 3: spectrum recordings 1 unwanted signals 3: spectrum recordings 1 unwanted signals 1.1 fm...

Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07

Annex 3: Spectrum recordings

1 Unwanted signals 1.1 FM Broadcast

FM Broadcast Spectrum

-40,0 dBµV

-20,0 dBµV

0,0 dBµV

20,0 dBµV

40,0 dBµV

60,0 dBµV

80,0 dBµV

100,0 dBµV

86,4 MHz 86,6 MHz 86,8 MHz 87,0 MHz 87,2 MHz 87,4 MHz 87,6 MHz

Level / 1 kHz

European FM mask

FCC mask for FM

Sensitivity

Fig. A3-1: High-dynamic spectrum recording of the lower sideband of the FM unwanted signal from the SU155 transmitter, modulated according to ITU-R BS.641.

FM Radio Spectrum

-30,0 dBµV

-10,0 dBµV

10,0 dBµV

30,0 dBµV

50,0 dBµV

70,0 dBµV

90,0 dBµV

110,0 dBµV

130,0 dBµV

150,0 dBµV

104,9MHz

105,0MHz

105,1MHz

105,2MHz

105,3MHz

105,4MHz

105,5MHz

105,6MHz

105,7MHz

105,8MHz

105,9MHz

Level / 1 kHz

ETSI Mask for FM

FCC mask for FM

Sensitivity

Fig. A3-2: High-dynamic spectrum recording of the lower sideband of the FM unwanted signal from the ITELCO transmitter, modulated according to ITU-R IS.1140.

Annex 3,


1.2 DRM120

DRM120 unfiltered OoB spectrum

-30,0 dBµV

-10,0 dBµV

10,0 dBµV

30,0 dBµV

50,0 dBµV

70,0 dBµV

90,0 dBµV

230,5MHz

230,6MHz

230,6MHz

230,7MHz

230,7MHz

230,8MHz

230,8MHz

230,9MHz

230,9MHz

231,0MHz

231,0MHz

Level/1kHz

DRM120 / 16QAM Mask

ETSI FM Mask

System noise

Fig. A3-3: High-dynamic spectrum recording of the upper sideband of the DRM120 unfiltered unwanted signal

DRM120 filtered OoB spectrum

-30,0 dBµV

-10,0 dBµV

10,0 dBµV

30,0 dBµV

50,0 dBµV

70,0 dBµV

90,0 dBµV

110,0 dBµV

87,6 MHz 87,8 MHz 88,0 MHz 88,2 MHz 88,4 MHz 88,6 MHz 88,8 MHz 89,0 MHz 89,2 MHz 89,4 MHz 89,6 MHz

Level/1kHz

DRM120 (16QAM) Mask

FM Mask

System noise

Fig. A3-4: High-dynamic spectrum recording of the upper sideband of the DRM120 filtered unwanted signal

Annex 3,


1.3 DRM+

DRM+ OoB spectrum

-40,0 dBµV

-20,0 dBµV

0,0 dBµV

20,0 dBµV

40,0 dBµV

60,0 dBµV

80,0 dBµV

100,0 dBµV

95,2MHz

95,3MHz

95,4MHz

95,5MHz

95,6MHz

95,7MHz

95,8MHz

95,9MHz

96,0MHz

96,1MHz

96,2MHz

Level/1kHz

DRM120 (16QAM) Mask

FM Mask

System noise

Fig. A3-5: High-dynamic spectrum recording of the upper sideband of the DRM+ unwanted signal

1.4 HD-Radio

FM/HD Radio Spectrum

-30,0 dBµV

-10,0 dBµV

10,0 dBµV

30,0 dBµV

50,0 dBµV

70,0 dBµV

90,0 dBµV

110,0 dBµV

96,1 MHz 96,2 MHz 96,3 MHz 96,4 MHz 96,5 MHz 96,6 MHz 96,7 MHz 96,8 MHz 96,9 MHz 97,0 MHz 97,1 MHz

Level / 1 kHz

European FM mask

ITU BS.1114 mask for DSB

FCC mask for FM

Sensitivity

Fig. A3-6: High-dynamic spectrum recording of the lower sideband of the HD-Radio unwanted signal

Annex 3,


FM/HD Radio Spectrum

-30,0 dBµV

-10,0 dBµV

10,0 dBµV

30,0 dBµV

50,0 dBµV

70,0 dBµV

90,0 dBµV

110,0 dBµV

97,1MHz

97,2MHz

97,3MHz

97,4MHz

97,5MHz

97,6MHz

97,7MHz

97,8MHz

97,9MHz

98,0MHz

98,1MHz

Level / 1 kHz

European FM mask

ITU BS.1114 mask for DSB

FCC mask for FM

Sensitivity

Fig. A3-7: High-dynamic spectrum recording of the upper sideband of the HD-Radio unwanted signal

Annex 3,


2 Spectrum recordings at the point of beginning interference The following figure shows a spectrum recording of a situation for DRM120 and FM broad-cast as interferers into FM broadcast reception with 200 kHz frequency separation where the S/N interference for Rx1 just begins. The wanted FM signal is to the left on 87.6 MHz, the unwanted signals (FM broadcast and DRM120) are to the right at 87.8 MHz:

***

RBVBSW

WWT

1 01

7.

kHzkHs

Marker 8 7 . 8

3 [T

0 0-0

3 75

00

].800

Bm Hz

20

dM

z

Mark

2m At t*Ref

- 40-28 dB 0 dB

er 8 7 . 5

er 8 7 . 8

2

1 [T

9 9-1

[T

0 0-0

1 84

801 95

00

].700].100

d BM

m Hz

70

M a r k

A1 - 50

*W IRM E

1V Bm

Hz 40

dM23

- 60

- 70*

W IRM E

3V

- 80

- 90

- 100

- 110

- 120

- 130

MH z HzCenter 87.7 71 kHz/ Spa

Fig. A3-8: FM stereo interfered by DRM120 (blue trace) and FM broadcast (green trace) at the point of beginning interference for Rx1.

n 710 k

Annex 3,


The following figure shows the situation for DRM120 filtered interfering with BOS receiver 1 at the beginning of the SINAD interference. To enable inband measurements the Frequency of the interfering DRM120 signal was set to 87.250 MHz. The frequency of the wanted signal is 200 kHz lower on 87.055. The protection ratio of -74 dB at this offset is already uncritical, this spacing is still less than the most critical real situation where the interferer is on 87.6 MHz (lowest broadcast channel) and the wanted signal on 87.255 MHz (channel 509, the highest BOS channel in the 4m band in Germany) and the frequency spacing would be 345 kHz.

Fig. A3-9: Narrowband FM / BOS interfered by DRM120 filtered at the point of beginning SINAD interference for Rx1.

Annex 3,


The following spectrum recording shows a situation with DRM120 filtered as the interferer against ILS localizer reception at the beginning of interference. The DRM120 signal is on 107.9 MHz, the VOR signal is on 108.0 MHz.

Fig. A3-10: Spectrum of wanted VOR and DRM120 filtered signals at the beginning of course interference.

The following spectrum recording shows a situation with DRM120 filtered as the interferer against ILS localizer reception at the beginning of interference. The DRM120 signal is on 107.9 MHz, the ILS signal is on 108.1 MHz.

Fig. A3-11: Spectrum of wanted ILS and DRM120 filtered signals at the beginning of course interference.

Annex 3,


The following picture shows a situation with HD-Radio as the interferer to ILS localizer recep-tion on F1 at the point of beginning interference due to intermodulation.

Fig. A3-12: ILS localizer in the presence of strong analogue broadcast and HD-Radio signals at the point of beginning interfer-ence, measured at point (1) in the block diagram in Fig. 42.

The frequencies in Fig. 46 are as follows:

F0: 108.1 MHz ILS frequency and frequency of intermodulation product

F1: 107.5 MHz HD-Radio

F2: 106.5 MHz unmodulated carrier

F3: 105.9 MHz unmodulated carrier

Annex 3,


3 Filter attenuation curves

rker 2 [

01

6

.03 Un i t

- 2 0 1 0

TG RF

Lvl Att

dBmdBmdBT1]

-27.8076

RBWVBWSWT

5

50500

kHkHms

zz

Ma 61

95

dBmMHz

RReeff --2255

LLvvllddBBmm

25 - 2

1

2 [T1] -27.69 dBm 106.038 07615 MHz1 [T1] -40.39 dBm

1

[T 107.000 00000 MHz1] 1.

-4955 9

5.311182

dBMH

z

A 30 -

35 -

40 -

1RM

45 -

50 -

55 -

60 -

65 -

70 -1

75 -C ent 1 0 6

3.J U L.2MHz S paner 500 kHz/ 5 MHz

52:3 4Date: 007 14:

Fig. A3-13: Output shaping filter for the DRM120 filtered signal (No. 42 in Annex 1)

Annex 3,


alt 1 [T

6

5

.13 Un i t

0 1 0

TG RF

Lvl Att

dBmdBmdBDe 1]

-0.0260

RBW

SWTVBW

3

28 03

kH

mskH

zz

95

42

dB kHz

RRee

00ff LLvvll dd BBmm

0 A

10 -

20 -

30 -

40 IE - 1V W 1SA

50 -

60 -

70 -

80 -

90 -1 1

00-1

10-1

20-1 C ent 1 0 8.1

4.J U L.2MHz S paner 100 kHz/ 1 MHz

28:0 8007 13:Date:

Fig. A3-14: Notch filter for the high-dynamic spectrum recordings of the unwanted DRM120 signals (No. 43 in Annex 1)

Annex 3,

annex 3: spectrum recordings 1 unwanted signals 3: spectrum recordings 1 unwanted signals 1.1 fm...

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