Ramsey Electronics COM3010 User Manual page 56

TYPICAL TEST PROCEDURES
STEP-3 INSERTION LOSS FINAL TEST
1. Leave the RF OUT cable connected to the duplexer antenna port. You can final test the
duplexer to make sure that it is operating correctly by an insertion loss test.
2. While the RECEIVE IN is connected to the transmitter side of the duplexer, switch the
generator to the repeater transmit frequency. Make sure the 50 Ohm load is connected
to the repeater receiver port.
3. You can now determine the insertion loss in db by adding the generator dbm value to
the RSSI value. Example Generator – 90 dbm and Receiver RSSI – 91.5 dbm = 1.5 db
insertion loss. It should be close to the manufacturer's specifications.
4. Likewise move the cable from the RECEIVE IN to the receiver side of the duplexer.
Switch the generator to the repeater receiver frequency. Make sure the 50 Ohm load is
connected to the repeater transmitter port.
5. You can now determine the receiver insertion loss in db by adding the generator dbm
value to the RSSI value. Example Generator – 90 dbm and Receiver RSSI – 91.5 dbm =
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1.5 db insertion loss. It should also be close to the manufacturer's specifications.
Your Notes:
Do not reproduce or distribute.
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