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|  MIL-T-48621A {AR)
i.
Adjust BAL Adj control for center meter reading, I.e.,
within the limits defined by the black band.
Set OPER/TEST switch to PHASE SHIFT position.
3"
k.
Adjust PHASE ADJ control for center meter reading, i.e.,
within the limits defined by the black band . Repeat
steps h. through k.
Repeat entire test for Channels 6, 7 and 12 on the microwave power
source (item 18, Table III). Disconnect W201 from RF IN port.
4*7.3.7
system gain self test
>
switch to INTL test.
Set
a.
MODE
b.
Set GAIN ADJ control to fully clockwise position.
c.
Set OPER/TEST switch to BAND l/Test.
Press OSC TEST pushbutton and while depressed, adjust
d.
REE LEVEL control so that the meter shows center
tidication.
Release the Osc TEST
e.
The meter reading
pushbutton
q
shall remain within
blue band region, as indication
of correct gain for the band tested (Band 1).
f.
Repeat entire test for the BAND 2 end
3 positions
BAND
of the OPER/TEST switch.
4.7.3.8
Intgrated noise measurements. All tests detailed
herein depend on the integrity of the bandpass filter bandwidths
which are tested and verified per their respective drawings (see
3.2.1 for drawing list).
a. Connect equipment as shown in Figure 3, with the
exception of the O MOD INPUT port of the 10556651 (item
18, Table III) which should have its 50 ohm termination
cap still in place. Set the 10556651 channel selector
to Channel 1.
b.
Using Table V as a guide, adjust the variable waveguide
attenuator (iten 16, Table III) for +10 DBM Input signal
to the RF IN port of the noise tester, using the power
meter (item 6, Table III) as an indicator.
set the noise tester controls as follows:
c.
(1) MODE switch to INTL TEST.
(2) Set the OPER/TEST switch to BAND 3
OPERATE.
37
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