Figure 109: Transmit Filter (700/800 MHz)
WARNING: Shock hazard. The GTR 8000 Base Radio contains dangerous voltages which can
cause severe electrical shock to personnel or damage to equipment. Set the rocker switches on
the front of the associated power supplies to the off position before servicing this component in
the base radio.
IMPORTANT: When using this procedure to replace or remove the transmit filter, the preceding
WARNING applies and the site must be powered down before starting the replacement
procedure if the entire site is connected to the transmit filter being removed. Powering down the
site causes any affiliated subscribers to relocate to another channel at an adjacent site. Disable
the channels before powering down so that the system does not attribute the loss of channel to
a failure. Disable a channel using either the Unified Event Manager (UEM) or Configuration/
Service Software (CSS).
Procedure:
1 Wear an Electrostatic Discharge (ESD) wrist strap and connect its cable to a verified good
ground.
CAUTION: Wear the ESD strap throughout this procedure to prevent ESD damage to
any components.
2 At the site, place all base radios in Service Mode that are using the transmit filter module being
replaced.
a Connect to transceiver module Ethernet service port. See Connecting Through an Ethernet
Port Link on page 140.
b From the menu, select Service → Test and Measurement Screen.
c Click Change to Service Mode.
d At the confirmation screen, click OK.
The base radio halts activity in the current mode and switches operation to the requested
mode.
3 Set the rocker switches on the front of the power supplies to the OFF (O) 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.
MN003286A01-E
Chapter
9: GTR 8000 Base Radio FRU Procedures
252
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