TM 11-6625-2946-14/TM 08168A-14/1
Table S-S. RF Signal Generator
Output Frequency and Level Performance Tests -Continued
Control settings
Performance
Test
Test
Equipment
Step
standard
procedure
no.
equipment
under test
c. Disconnect test set from t-connector and using AN/USM-207, measure c. 30.047 MHz
SG-l144(v)1/U
min
Preset for a 30.05 MHz
frequency of rf signal at connector.
30.052 MHz max
40 mV output.
AN/USM-207
level of Test Set mixer output by disconnecting cable from W1P2J1 and
Controls set to measure
measuring center lead.
30.05 MHz.
a. None
u. Set test set FREQUENCY CODE switches to 3001. Readjust
2
Same as step I
Same as step 1
SG-1144(V)l/U for a 54.05-MHz, 40-mV output.
b. Repeat steps I b, c, and d.
b. 54.046 MHz
min
54.054 MHz max
20 mv min
a. None
Same as step 1
Same as step 1.
3
SG-1144(V)1/U for a 79.95 MHz 40 mv output.
loscope and adjust SG-1144(V)1 /U frequency control until a 1 cycle or
less/cm sinewave is obtained. Release SENS pushbutton.
c. Disconnect test set from t-connector and using AN/USM-207, measure c. 79.955 MHz
max
frequency of rf signal at connector.
79,945 MHz min
d. Press and hold test set SENS pushbutton. Using rf voltmeter, measure d. 20.0 mv min
level of test set mixer output by disconnecting cable from W1P2J1 and
measuring center lead.
(3) Power Supply PP-3940/G
5 - 1 2 . Receiver Sensitivity Measuring Cir-
(4) Distortion Analyzer TS-723D/U.
cuit Performance Tests
d. Test Connections and Conditions. Connect equip-
s. Test Equipment and Materials.
ment as shown in figure 5-7.
c. Procedure. Perform the procedures as described in
(2) Digital Voltmeter AN/USM+51
Table 5-6. Receiver Sensitivity Measuring Circuit Performance Test
Control settings
Performance
Test
Test
Equipment
Step
standard
procedure
no.
under test
equipment
a. IO div.
a. Adjust power supply COARSE ADJ and FINE ADJ controls for a
POWER: EXT
PP-3940/P
reading of + 24 vdc on its voltmeter, Observe test set meter reading.
FUNCTION:
COARSE ADJ: fully ccw
b. 5 *0.5 div.
RCV
b. Connect AN/URM-127 to test set AUDIO input and adjust AN/URM
ON/OFF switch: ON
127 OUTPUT CONTROL for a reading of 5 units on test set meter.
TS-723D/U
c. None
c. Using TS-723D/U, measure test set audio input signal in db. Adjust
Power switch: ON
AN/URM-127 OUTPUT CONTROL to reduce its output 15 db on the
Range selector
d. 5 div. or more
analyzer.
switch: 0 dB
d. Momentarily press test set SENS switch and observe reading on test
AN/URM-127
set meter.
POWER switch: ON
FREQ METER: ON
FREQ RANGE MULTI-
PLIER: X10
Vernier dial: 100
OUTPUT CONTROL:
ccw
shielded wire with BNC connector on one end.
5 - 1 3 . Field Strength Measurement Circuit
b. Test Connections and Conditions. As described in
Performance Test
the following procedure.
a. Test Equipment and Materials.
c. Procedure. Perform the procedures as described in
(1) RF Signal GeneratorSG-1144(V)1 /U
(2) Cable, locally fabricated, 2 ft. insulated, un-
5-14
