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, Page 1
Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07
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, Page 2
Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07
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, Page 3
Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07
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, Page 4
Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07
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, Page 5
Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07
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, Page 6
Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07
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, Page 7
Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07
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, Page 8
Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07
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, Page 9
Federal Network Agency / Fachhochschule Kaiserslautern -Compatibility Measurements August 07
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, Page 10