User's Manual

68P80801E35-B 5/1/2002 11

EBTS System Manual - Vol 2 Troubleshooting

Generation 2 Single Channel BR Station Verification Procedures

1. Remove power from the Base Radio by setting the Power Supply rocker

switch (located behind the front panel of the Power Supply) to the OFF (0)

position.

2. Connect one end of the RS-232 cable to the service computer.

3. Connect the other end of the RS-232 cable to the Service Access port located

on the front panel of the BRC.

4. Disconnect the existing cable from the connector labeled PA OUT. This

connector is located on the backplane of the Base Radio.

CAUTION

Make sure power to BR is OFF before disconnecting

transmitter RF connectors. Disconnecting transmitter

RF connectors while the BR is keyed may result in RF

burns from arcing.

5. Connect a test cable to the PA OUT connector.

6. Connect a 10 dB attenuator on the other end of the test cable.

7. From the attenuator, connect a cable to the RF IN/OUT connector on the

R2660 Communications Analyzer.

8. Remove power from the R2660 and connect the Rubidium Frequency

Standard 10MHZ OUTPUT to a 10 dB attenuator.

9. Connect the other end of the 10 dB attenuator to the 10MHZ REFERENCE

OSCILLATOR IN/OUT connector on the R2660.

NOTE

Refer to the equipment manual provided with the

R2660 for further information regarding mode

conﬁguration of the unit (Motorola Part

No. 68P80386B72).

10. Set the R2660 to the EXT REF mode.

11. Apply power to the R2660.

12. Set the R2660 to the SPECTRUM ANALYZER mode with the center

frequency set to the transmit frequency of the Base Radio under test.

13. Perform the appropriate transmitter veriﬁcation procedure below for the

particular Power Ampliﬁer used in the Base Radio.