DR600 Service Manual
5. Click “ok” to save.
4FSK EER test
1. Enter computer modulation mode.
2. Modulate PC software value to make repeater transmit
O.153.
3. Check 4FSK EER
≤
5%.
4. Modulate frequenciesone by one.
5. Observe FSK EER value on the integrated tester.
6. Check 4FSK EER
≤
5%.
FSK EER
≤
5%
Maximum audio
frequency
deviation test.
1. Connect the audio input wire to repeater.
2. Output audio signal 1KHz RMS 120mV to repeater and
make it transmit.
3. The audio frequency deviation should be: N: 2000
±
100Hz, W:4000
±
100Hz.
4. Test frequencies one by one.
N: 2000
±
200Hz
W: 4000
±
400Hz
QT/DQT
frequency
deviation and
wave form test.
1. Observe frequency deviation of QT.
2. Observe frequency deviation and wave form of DQT.
N: 350
±
150Hz
W: 750
±
250Hz
Modulationdisto
rtion
Observe distortion form value.
<
3%
Tx SNR
Observe SNR form value
W:
>
45dB
N:
>
40dB
Analog&digital
ACP
Observe ACP display value.
W:
<
-70dB
N:
<
-60dB
Spurious
emission
Observe spectrum analyzer display value.
<
1GHz:
<
-36dBm
>
1GHz:
<
-30dBm
6.2.3 Rx Adjustment
Modulation
Subject
Modulation Procedure
Standard
Rx Sensitivity
1. Enter computer modulation mode.
2. Enter modulation mode ”Receiver BPF”, and click the six
frequencies one by one.
3. Make SINA
>
12dB.
-
42
Содержание DR600
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Страница 37: ...DR600 Service Manual 33 ...
Страница 109: ...DR600 Service Manual Appendix 2 PCB View and Schematic Diagram Figure 1 Rx Module Top Board PCB View 105 ...
Страница 110: ...DR600 Service Manual Figure 2 Rx Module Bottom Board PCB View 106 ...
Страница 111: ...DR600 Service Manual Figure 3 Tx Module Top Board PCB View 107 ...
Страница 113: ...DR600 Service Manual Figure 6 Baseband Mainboard Top Board PCB View 109 ...
Страница 114: ...DR600 Service Manual Figure 7 Baseband Mainboard Bottom Board PCB View 110 ...
Страница 115: ...DR600 Service Manual Figure 8 Front Panel Top Board PCB View Figure 9 Front Panel Bottom Board PCB View 111 ...
Страница 116: ...DR600 Service Manual Figure 10 Power Board Top Board PCB View 112 ...
Страница 117: ...DR600 Service Manual Figure 11 Accessory Board Top Board PCB View Figure 12 Accessory Board Bottom Board PCB View 113 ...
Страница 118: ...DR600 Service Manual Figure 13 Enternet Board Top Board PCB View 114 ...
Страница 119: ...DR600 Service Manual Figure 14 Enternet Board Bop Board PCB View 115 ...
Страница 150: ...DR600 Service Manual Figure 21 Baseband Mainboard Schematic Diagram 146 ...