Amplifier Research 200T4G18, Operating And Service Manual

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Model 20T4G18
USE 8-32 FH SCREWS, 3/8-1/2" THREAD IN CABINET
TO ATTACH REAR SUPPORT BRACKETS HERE
(BOTH SIDES)
100-255 VAC
SAFETY
GROUND
50/60 HZ.
500 VA
EXTERNAL
INTERLOCK
RF INPUT
0 DBM MAX
RF OUTPUT
TYPE TNC
RF SAMPLE OUT
AC POWER IN
IEEE-488
23.675
0.865
3.50
Figure 3-1. Rear View of HPA, Rack Mounting Configuration
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 necessary support rails and facilitate installation
and removal of the units.
3.2.3 Cooling Requirements
The TWTA is provided with a cooling fan. It is important that air movement around the rear of the unit be
unobstructed.
CAUTION:
For either bench or rack mounting, do not position the TWTA in such a
way that the air intake or outlet are blocked, or that the exhaust flow is
directed into the intake. See Paragraph 3.5 for location of air intake and
air outlet. If the unit is rack mounted, make sure that the intake air is
45°C or below. If necessary, fabricate a short duct to direct the hot
exhaust air out of the rack enclosure. Great care must be taken to
minimize any flow restrictions. Avoid mounting heat-producing
equipment in the same rack, especially below the TWTA. Failure to
provide adequate cooling can result in the unit's shutting down from
overtemperature conditions.
The TWTA dissipates approximately 500 watts when in the operate mode.
Rev B 9
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