TM 11-6625-847-45
Step
Control setting and operation of
No.
Operation of test procedure
equipment under test
Performance standard
4
NOTE Allow a 10-
Rotate the SERV SEL.
POWER indicator on common
minute, warmup period
switch on the test set to SSB/
module tray A1A2 illuminated.
for test set frequency
NSK. Set. the POWER switch
standard.
on common module tray
A1A2 to ON.
5
Connect the dc test leads
Voltage measures 33 2
of the ME-26(*)/U to
volts dc.
RCVR IF test points
Hl and LO on tray
A1A2.
6
Set the RCVR IF TEST SE-
Dc voltage varies from not
LECTOR switch on tray
more than 0.35 to not
less than 2.5 volts dc.
less than 2.5 volts dc.
Rotate the RCVR IF RF
GAIN control from fully
counterclockwise.
7
Check the dc voltage
Switch the REC XMIT
Dc voltage drops to 0 when
indication on the ME-
switch oil this test set
REC XMIT switch is set to
26(*)/U when the
from REC to XMIT,
XMIT.
REC XMIT switch on
then back to REC.
the test set is set to
XMIT.
8
ON tray A1A2, set the RCVR
Indication is + 20 1 volts dc
IF TEST SELECTOR switch
(BFO TONE control has
to position 3. Rotate the SERV
effect on the voltage).
SEL switch on the test set
to CW. Rotate the RCVR IF
BFO TONE control on tray
A1A2 from fully clockwise
clockwise to fully clockwise.
9
Connect the AN/USM-207 to
Set the AGC SYNC switch on
Measurement is 1.7515 mc
the TWO TONE OUT
tray A1A2 to ON. Set
100 cps.
connector on the test set;
the test set IF OSCILLATOR
refer to figure 5-1.
select switch to 1 +2.
10
Set the test set IF OSCILLATOR
Measurement is 1.7525 rnc
select switch to 1 +3.
100 cps.
11
Measure the dc voltage
Voltage measures + 20 1 volt
at XMTR IF AND
dc.
AUDIO test points
HI and LO on tray
A1A2.
12
Set the XMTR IF AND AUDIO
Dc voltage varies from a mini-
TEST SELECTOR switch on
mum of 0 volt dc to a maxi-
tray A1A2 to 3, find the test
mum of + 20 volts dc.
set KEY switch to ON. Rotate
the XMTR IF AND AUDIO
ALC APC PPC POWER
CONTROL on tray A1A2 from
fully clockwise to fully
counterclockwise.
18
Disconnect all test equip-
Reset all switches and controls to
POWER indicators on the test
ment.
the setting listed in paragraphs
set and tray A1A2 are ex-
5-6 and 5-10.
tinguished.
5-6
Previous Page
