TM 11-6625-486-14&P
Control Settings
Test Procedure
Performance Standard
Test Equipment
Equipment under test
AN/USM-26(*):
FUNCTION SW: OPER.
a. Allow AN/USM-26(*) to
a. None.
POWER: ON.
RANGE SW: B.
Warm up for 15 minutes
FUNCTION: FREQUENCY.
DIAL: 5,000 kHz (5 MHz).
before proceeding.
STD FREQ: 10 MC.
CORRECTOR: midrange.
b. Adjust CORRECTOR
b. None.
STD GATE TIME: 1.
Control to indicate 5,000
MIXING FREQ, MCS: 0.
kHz on AN/USM-26(*).
CONVERTER GAIN:
c. Rotate CORRECTOR control
c. CORRECTOR control should
Advance control for a sat-
over its full range and
cause a frequency change of
isfactory counter readout.
observe frequency on
500 Hz from 5,000 kHz.
AN/USM-26(*).
6-36. Frequency Resetability
FR-149(*)/USM-159 from its case and place the
equipment as shown in figure 6-19. Do not connect the
a. Test Equipment and Material.
AN/USM-26(*) until instructed to do so.
(1) Frequency Meter AN/USM-26(*)
with
Frequency Meter Subassembly MX-1637A/U.
(2) Headset H-216/U.
b. Test Connections and Conditions. Remove the
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