 |
|||
|
|
|||
| ||||||||||
|
|  MIL-T-48621A (AR)
Repeat steps i. through k. for Channel 1 of the
t.
microwave power source (item 18, Table 111).
u.
Repeat steps p. through t. for Channels 2 through 12 of
the microwave power source (Item 18, Table III).
v*
Set up equipment as shown in Figure 2, with microwave
amplifier [item 32, Table XIX) power switch OFF, and the
power meter (items 6 and 8, Table III) connected to the
W/G-to-Type N adapter (item 14, Table III) via cable
W201 and the 20 DB coaxial attenuator (item 34, Table
S11 ) . Set the power meter scale to +5 DBM. Ensure that
the microwave power source (item 18, Table III) is OFF,
by shutting down the +28 Vdc power supply (Item 1, Table
11X) . Set the variable waveguide attenuator (Item 16,
Table III) to maximum attenuation (60 DB).
CAUTION :
Never apply power to the microwave amplifier input .
-
unless Its output is terminated into a SO-ohm load.
Damage to the traveling wave tube (TWT) could
result.
w.
Set the microwave amplifier (item 32, Table III) power
switch to allow thirty (30) minutes warm-up the before
continuing test.
...
x.
Set the microwave power source (item 18, Table 111)
channel selector to Channel 1. Turn the +28 Vdc power
supply (item 1, Table 111) to ON.
Adjust the GAIN control on the microwave amplifier (item
Y*
32, Table XII) so that the CATHODE CURRENT meter reads
in the RATED POWER region.
Adjust the variable waveguide attenuator (item 16, Table
20
III) so that the power meter (items 6 and 8, Table 111)
reads +3 DBM. Place the microwave amplifier (item 32,
Table III) in the STANDBY mode.
aa.
Disconnect the power meter (items 6 and 8, Table III)
and 20 DB coaxial attenuator (item 34, Table 111) and
connect the W/G-to-Type N adapter (item 14, Table 111)
to the RF IN port of the noise tester through cable
W201 Set RF LEVEL control fully clockwise.
bb .
Place the microwave amplifier (item 32, Table III) In
the OPERATE mode. AlloW one minute soak. Place the
amplifier in the STANDBY mode.
cc.
Repeat steps x. through aa. for all twelve channels of
the microwave power source (item 18, Table 111).
DiSConnect the noise tester from the test setup.
dd .
33
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals