GTR 8000 Base Radio
9.13.1 How To Replace a Duplexer (VHF)
Procedure Steps
1
Wear an electrostatic discharge (ESD) wrist strap and connect its cable to a verified good ground. This strap
must be worn throughout this procedure to prevent ESD damage to any components.
2
Disable the base radio with the duplexer module being replaced.
a. Connect to the device modules Ethernet service port using Configuration/Service Software (CSS). See
Connecting Through an Ethernet Port Link, page 4-11
b. Select
Service → Test Measurement Screen
from the menu.
c. Click
Change to Service Mode
.
Step result:
The base radio is disabled.
3
Set the rocker switch on the front of the power supply to the OFF (0) position.
4
Remove the duplexer from the base radio, as follows:
a. Label and disconnect the Rx output, Tx input, antenna output, and ground cables from the duplexer.
b. Remove the four screws which secure the duplexer to the rack using T20 bit.
5
Install the duplexer to the rack, as follows:
a. Secure the duplexer to the rack using the four screws which were previously removed.
b. Reconnect the Rx output, Tx input, antenna output, and ground cables from the duplexer.
6
Set the rocker switch on the front of the power supply to the ON (1) position.
7
Enable the base radio as follows:
a. Select
Service → Test Measurement Screen
from the menu.
b. Click
Change to Normal Mode
.
Step result:
The base radio is enabled.
9.14 Replacing an Antenna Relay
Shock hazard. The GTR 8000 Base Radio contains dangerous voltages which can cause electrical
shock or damage to equipment. Set the power supply switches for the affected equipment to the
Off (0) position when servicing this component in the base radio.
9-40
6871022P86-A - November 2012
Summary of Contents for GTR 8000
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