AR 10037990, Operating And Service Manual, Page: 28 / 54

Model 250T6G18
8 Rev A
3.2 INSTALLATION
3.2.1 Unpacking
Upon receiving the TWTA, unpack the unit and inspect it for obvious signs of external damage. If damage is
observed, notify the carrier and contact an authorized service representative.
Save and store the shipping container in case the unit needs to be returned in the future for calibration or repair.
CAUTION:
The RF amplifier should not be operated if there is physical damage,
missing hardware or missing panels.
3.2.2 Mounting
NOTE: Due to the weight of the unit, the removal of the amplifier from the cabinet or rack is a two-person
operation.
Disconnect power and any other cables. Remove any screws connecting the HPA to a rack or cabinet. Carefully
remove the HPA from the rack or cabinet. If slide rails are used, depress the buttons on each slide rail to remove
the unit from the rack.
CAUTION:
Never rack mount the TWTA using the front panel alone. The chassis is
likely to be damaged unless its weight is supported. Slide rails can be used
in a rack mount configuration.
See Figure 3-1 (below) for the locations of threaded holes which may be used for supplementary support of the
rear of the TWTA for transport. Screws installed in these threaded holes may be removed and replaced with
screws of appropriate length to thread 3/8 - 5/8 inch into the TWTA chassis.
Figure 3-1. Rear View Support Holes
For rack mount installation of multiple units, the units should be separated vertically by at least 1 3/4 inches. This
will allow room for necessary support rails and facilitate installation and removal of the units.