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Service Instructions
Item 2: RSSI Calibration
Purpose:
Calibration of the RSSI (received signal strength indicator)
Test method:
Radio test set in RX mode
Input signal:
Apply 935.0125MHz RF signal modulated with a 1kHz tone at 5.7kHz deviation at
a level of -115dBm to the antenna connector
Measurement point:
None
Limit:
-115dBm
-107dBm
-87dBm
Procedure:
1. Apply 935.0125MHz RF signal modulated with a 1kHz tone at 5.7kHz deviation
2. Turn the transmitter on (TP-2:2)
3. Disable the AFC (TP-15:0)
4. Enter RF sensitivity test (TP-9)
5. Press M + S
6. Press M + # to move to next adjustment
7. Set the signal generator to -107dBm
8. Press M + S to store the value
9. Press M + # to move to next adjustment
10.Set the signal generator to -87dBm
11.Press M + S to store the value
12
20 < value < 150
30 < value < 218
50 < value < 279
at a level of -115dBm to the antenna connector
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