TM 11-5820-801-30
Figure 3-8. Channel Gain-Bandwidth Test Setup.
b
RF Gain-Bandwidth Test Procedure.
oscilloscope face. Mark the trace with a grease pencil.
This is the upper reference level.
(1) After the test setup is made using Test
(5) Increase the attenuation 2 dB (CN-1367/U
Reference Connection (para 3-7a) (fig. 3-8) energize
set to 12 dB) and mark this trace also on the
test equipment (sweep generator and oscilloscope) and
oscilloscope face.
permit a 15- minute warmup period.
This is the lower reference level. The test equipment is
(2) Set the sweep generator to sweep the
now calibrated.
frequency band 7.20 to 7.80 GHz. Set frequency
(6) Remove the Test Reference Connection
markers at 7.25 and 7.75 GItz.
Check marker
and make the Test Connections. Connect CN- 1367/U
frequencies with FR-194/U.
to Port 3 of input Waveguide Switch 3A2 and connect
(3) Set CN-1367/U at 10 dB.
VG-1054/U to Port 3 of output Waveguide Switch 3A3.
(4) Set AN/USM-273 for maximum sensitivity
and obtain a convenient reference trace on the
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