TM 11-5821-333-30
2-23. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 16. HOMING CHECKS
a.
Connect test cable W5 between J4 on uut
and J4 on test adapter.
a. No response.
b. No response.
c. No response.
Connect test cable W6 between J5 on uut
and J5 on test adapter.
b.
Set uut switches:
MODE
HOM
PRESET
4
c.
Set test adapter switches:
S1
10
TEST EQUIPMENT
SELECTOR
DMM
d. No response.
Disconnect rf probe from DMM.
e. No response.
f. No response.
e.
f.
Connect double banana to BNC adapter to
DMM .
Set DMM to read dc volts.
g, No response.
h, No response.
Connect coaxial cable between DMM and
J13 on test adapter.
i.
Set rf signal generator:
Frequency
55 MHz
Modulation
OFF
Output level
-69 dBm
i.
No response.
j.
DMM reading is greater than or equal to
26 V dc. If not, interface module (A4) is
bad.
Turn off rf signal generator and read DMM.
k.
1.
m
Turn on rf signal generator and read DMM.
k. DMM reading is less than or equal to 2 V
dc. If not, go to chart 27.
Set S1 on test adapter to 11.
1.
No response.
Set rf signal generator output level to -80
dBm and read DMM.
m. DMM reads -25 to +25 mV dc. If not in-
terface module (A4) is bad.
Set rf signal generator output level to -4
dBm and read DMM.
n. DMM reads 120 to 220 mV dc. If not, go
to chart 28.
n.
2-31
