User's Manual

22 68P80801E35-B 5/1/2002
Troubleshooting EBTS System Manual - Vol 2
Generation 2 Single Channel BR Station Verification Procedures
13. As shown below respectively for 800 MHz Generation 2 Base Radios, the
following command returns the kit numbers of the receiver and all other
modules. At the prompt, type:
Receiver Verification: Measurement of the Generation 2 Base Radio (No RFDS)
The receiver verification procedure sends a known test signal into the Base Radio
to verify the receive path. The signal is fed DIRECTLY into the ANTENNA
PORTS in the back of the Base Radio. This excludes the RFDS and antenna cabling
from the measurement. This verification procedure is recommended after
replacing a Receiver, BRC, or Power Supply module.
NOTE
The following procedure requires the Base Radio to be
out of service. Unless the base radio is currently out of
service, Motorola recommends performing this
procedure during off-peak hours. This minimizes or
eliminates disruption of services to system users.
Equipment Setup
Set up the equipment for the receiver verification as follows:
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 STATUS port located on the
front panel of the BRC.
4. Disconnect the existing cables from the connectors labeled RX1, RX2, and
RX3 on the back of the Base Radio. If the radio is configured for 2 Branch
diversity, disconnect the RX1 and RX2 cables.
5. Connect test cables from each of the RX1, RX2, and RX3 connectors (Cables
A,B,C in Figure 8) to the input ports of the 3-way splitter. For 2 Branch
diversity tests, load the RX3 cable with an appropriate 50ohm load or
connect it to the RX3 antenna port on the radio.
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