AR 10009284, Operating And Service Manual

Page: 22 / 62

Model 40T26G40A
8 Rev A
3.2.2 Mounting
The TWTA may be operated as a stand-alone bench-top unit, or it can be installed in a 19-in. rack.
If rack mounting is desired, first remove the amplifier from the cabinet, then install the amplifier in the rack.
Optional slide rails for rack mounting are available.
NOTE: Due to the weight of the unit, the removal of the amplifier from the cabinet or rack is a two-person
operation.
Before removal disconnect the unit’s power, RF, and any other interface connectors. On the rear of the unit,
remove any screws used to connect the mounting brackets to the amplifier. On the front of the unit, remove
the four screws holding the front panel to the cabinet. Carefully slide the amplifier out of the front of the
cabinet.
CAUTION:
Never rack-mount the TWTA using the front panel alone. The chassis is
likely to be damaged unless its weight is supported. Bottom support rails
must be provided in a rack-mount configuration.
See Figure 3-1 for the locations of threaded holes that may be used for supplementary support of the rear of
the TWTA.If bottom supports are used for rack-mount installation of multiple units, the amplifiers should be
separated vertically by at least 1-3/4 inches. This will allow room for the necessary support rails and will
facilitate installation and removal of the units.
REMOVE 8-32 FH SCREWS TO ATTACH
1 kVA
RF OUTPUT
120-240
50-60 HZ
AC IN
GROUND
SAFETY
15 DBM MAX
TYPE K
RF IN
A2J1
-42 DB (NOM)
A2J2
TYPE K
FWD SAMPLE
INTERLOCK
EXTERNAL
J2
IEEE-488
INTERFACE
REMOTE
6-32 UNC THRU
(4 PLCS)
3.500
(BOTH SIDES)
REAR SUPPORT BRACKETS HERE
23.875
0.865
3.301
2.625
1.951
7.545
5.935 3.187
Figure 3-1. Location of Supplementary Threaded Holes for Rear Panel Support