TM 11-6625-2398-15-3
Step
Test equipment
Equipment under
Test
Performance
No.
control settings
test control settings
procedure
standard
q. Repeat h and i of step 4 for plug
Meter reading of 100
contact pins 3, 8, 9, 11, 13, 18, 22
megohms or higher
and 23 (28 tests).
must be obtained on
each test.
8
Observe Warning in step 1 above.
Check insulation resistance of cable
W48 (fig. 6-18) as follows:
terminal to the outer terminal of
plug P2.
b. Connect the LINE terminal of the
ohmmeter to the center coaxial ter-
minal of A on plug P1.
c. Repeat c of step 1.
d. Repeat d of step 1.
Meter reading of 100
megohms or higher
must be obtained.
e. Repeat a, b and d for
Meter reading of 100
P3 to P1-C
megohms or higher
AT1(P4) to P1-E
must be obtained on
P5 to P1-F
each test.
P6 to P1-B
8-6. Hybrid Attenuator Insertion Loss Measurement
(7)
Fixed Attenuator AT1/AT2(2).
between RF IN/OUT and RF SUM Connectors
(8)
Termination AT3/AT4(1).
a. Test Equipment and Materials.
(9)
50-ohm Terminations (2), Microlab/FXR TA-
(1) Signal Generator SG-340/G.
6MN.
(2) Variable Attenuator, Alfred Electronics Model
(10) Cables W14/W15 (2).
E101.
(11) Adapter UG-606/U.
(3) Standing Wave Radio Indicator AN/UPM-
b. Test Connections and Conditions. Initially connect
108A.
the equipment as shown in solid lines, figure 8-3. Disconnect
(4) Crystal Detector HP-423A.
the hybrid attenuator and connect the variable attenuator
(connections shown in broken lines) as directed in the
(5) Adapter UG-201A/U.
procedure below.
(6) Adapters CP7/CP8 (2).
Step
Test equipment
Equipment under
Test
Performance
No.
control settings
test control settings
procedure
standard
1
a. SG-340/G
None
a. Set the MEGACYCLES dial to
POWER: ON
1090 with the frequency control
Function switch:
knob. Turn on the signal generator
CW
and allow a minimum of 20 minutes
MEGACYCLES:
warm-up period before proceeding.
1090
b. AN/UPM-108A
b. Turn on the standing wave ratio
Power: ON
indicator and allow a minimum of
METER SCALE:
10 minute warm-up period before
NORMAL
proceeding.
INPUT SELECTOR:
XTAL-200 K Ω
c. SG-340/G
8-10
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