GTR 8000 Base Radio
3
Set the rocker switches on the front of the power supplies to the OFF (0) position.
4
Remove the transmit filter tray from the rack, as follows:
a. Label and disconnect the Tx input, antenna output, and ground cables from the transmit filter.
b. Using a T30 bit, remove the two screws which secure the tray to the rack.
c. Slide the tray out the front of the rack.
5
Remove the transmit filter from the tray, by removing the T20 screws that attach it to the tray.
6
Install the new transmit filter in the tray, as follows:
a. Place the new transmit filter in the tray, in the same location and orientation as the module that you removed.
b. Secure the replacement transmit filter to the tray, using the T20 screws you previously removed.
7
Re-install the transmit filter tray in the rack, as follows:
a. Slide the tray in the front of the rack.
b. Using a T30 bit, secure the tray to the rack with the two screws you previously removed.
c. Reconnect the Tx input, Antenna output, and ground cables to the transmit filter.
8
Set the rocker switches on the front of the power supplies to the ON (1) position.
9
Enable each 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.
9.10 Replacing the Dual Circulator/Isolator Modules
For a GTR 8000 Base Radio, the following RFDS modules are assembled in a tray:
• External Dual Circulator/Isolator
• Circulator Load (a module that is connected directly to the External Dual Circulator module)
• Low Pass/Harmonic Filter
and
show these modules installed on a tray.
9-30
6871022P86-A - November 2012
Summary of Contents for GTR 8000
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