Kirisun TR850 - Page 49

TR850 Service Manual
4. Adjust to 12.8MHz±1Hz.
Rx
localoscilla
tor power
Rx board
test point
TP3005
1. Enter test mode “Receiver BPF”.
2. Set HP8921 to TX mode.
3. Connect the TP3005 test poit on the RX board
to HP8921RF high power input port.
4. Check the frequency: (Rx frequency
-51.65MHz)±100Hz; output power ＞10dBm.
Frequnency
tolerance≤±
200Hz
Output power＞
10dBm
Tx central
frequency
&power
Tx module
J200
1. Enter test mode “Low Freq.Mod Deviation”.
2. Set HP8921 to TX mode.
3. Connect Tx module RF output to HP8921 RF
high power input port.
4. 4. Adjust to :±100Hz, Check: output power＞
15dBm.
Frequency
tolerance≤±
200Hz
Output power＞
15dBm
Tx lock
voltage
testing
Tx board
TP100
1. Turn on the repeater.
2. Set HP8921 to TX mode.
3. Connect TX port to HP8921 RF high power input
port.
4. Enter computer modulation mode.
5. Click Tx low power test points to test lock voltage
0.5V≤CV voltage
≤4.5V
Rx lock
voltage
test
Rx board
TP100
1. Turn on the repeater.
2. Set HP8921 to TXmode.
3. Connect TX port to HP8921 RF high power input
port
4. Enter computer modulation mode.
5. Click Rx sensitivity test points to test lock voltage
0.5V≤CV voltage
≤4.5V
6.2.2. Tx Adjustment
Subject Modulation Procedure Standard
Tx high
power
1. Enter pc tuning mode.
2. Enter modulation mode”High Power”.
3. Adjust PC software value; observe power value on the
integrated tester.
4. Adjust to test power: 40±2W.
5. Modulate the frequency one by one.
40±5W
Tx low
power
1. Enter computer modulation mode.
2. Enter modulation mode “Low Power”.
3. Adjust PC software value; observe power value on the
20W±1.5db
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