TM 11-5821-284-34
Step
Test equipment
no.
control settings
Test procedure
Performance standard
MV ADJUST: fully CCw.
multiply result by 100 to
NOTE
MANUAL TUNE: OFF.
determine percent of reflected
RT-828/ARC-181: Ad-
power. Use the following formula:
If indication is abnormal
Just for 8-0-MHz
Reflected
in any of the steps,
output, maximum
power
in any of the steps
power,
___________X100=reflected
replace the coupler
Power Supply: Adjust
power
for +27.5 Vdc
Forward
power
2
Same as step 1, except
Measure forward and reflected
Antenna tunes to 35 MHz and
set RT-823/ARC-31
power at 85 MHz.
reflected power in less than 25%
for 85-MHz output.
of forward power.
3
Same as step 1, except
Measure forward and reflected
Antenna tunes to 40 MHz and reflected
set RT-828/ARC-181
power at 40 MHz.
power is less than 26% of forward
for 40-MHz output.
power.
4
Same as step 1, except
Measure forward and reflected
Antenna tunes to 46 MHz and
set RT-828/ARC-181
power at 45 MHz.
reflected power Is less than 25%
for 45-MHz output.
of forward power.
5
Same as step 1, except
Measure forward and reflected
Antenna tunes to 60 MHz and
set RT-828/ARC-181
power at 50 MHz,
reflected power is less than 25r/,
for 50-MHz output.
of forward power.
6
Same as step 1, except
Measure forward and reflected
Antenna tunes to 55 .MHz and
Met RT-828/ARC-1S1
power at 65 MHz.
reflected power Is less than 265%
to 655-MHz output.
of forward power.
7
Same as step 1, except
Measure forward and reflected
Antenna tunes to 60 MHz and
set RT-828/ARC-181
power at 60 MHz.
reflected power is less than 265%
to S0-MHz output.
forward power.
8
Same as step 1, except
Measure forward and reflected
Antenna tunes to 65 MHz and
set RT828/ARC-1l1
power at 65 MHz.
reflected power Is less than 26%
to 65-MHz output.
forward power.
9
Same as step 1, except
Measure forward and reflected
Antenna tunes to 70 MHz and
reflected power Is less than 25To
set RT-823/ARC-181
power at 70 MHz.
to 70-MHz output.
forward power.
10
Same as step 1, except set
Measure forward and reflected
Antenna tunes to 75.95 MHz and
RT-828/ARC-181 to
power at 75.95 MHz.
reflected power is less than 26%/c
75.95 MHz output.
forward power.
Remove radome from coupler as described in paragraph
3-13.
Manual Cycle and Run Signal Test
a. Test Equipment and Material.
without ground plane. Do not apply power to the
(1) Test Set, Antenna AN/ARM-115.
equipment.
(2) Oscilloscope AN/USM-281.
c. Procedure.
(3) Power
Supply
PP-1104/G
or
equivalent.
b. Test Connections
and
Conditions.
Step
Test equipment
no.
control settings
Test point
Test procedure
Performance standard
1
N/A
N/A
Manually cycle
Variable capacitor C1
variable capacitor l01
travels smoothly over
from one limit to other.
entire range of move-
ment and does not drag
or have any tight spots.
Capacitor travels full
range before tripping
limit switches SI and S2.
2
Power Supply: ON.
TP17
a. Ground pin 10 of cir-
a. Waveform is same as
controls to observe
cuit board A1. Con-
that shown In figure 6-
AN/USM-281 : Set
nect AN/USM-281 to
4V. T2 is 25 15 ms.
3-4
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