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Page Title:
Alignment Chart, Receiving Set, Radio AN/PRR9 |
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 TM 11-6625-937-12
Alignment Chart, Receiving Set, Radio AN/PRR9
Control settings of ID-1189/PR
Setting
RECVR
FREQUENCY
TEST
RECVR
of
Adjustmentsa
Adjust
Step
TEST
MC
PROBE
OUTPUT
AN/PRR-9
(figs. 3-6 and 3-8)
for
No.
FUNCTION
SIG.
3,.4
plug
control
1
---------------
-------
------
------
-------
Holes B, C, D
Per fig. 3-7
2
OSC---------
-------
------
TP1
-------
cw
Hole A -------
Max meter indi-
cation.
3
COARSE
Max cw
Approx.
TP 2
-------
cw
FREQUENCY
Preset FRE-
RF
new
MC.
QUENCY MC
operat-
to approximate
ing fre
new operating
quency
frequency, and
then make fine
adjustment for
maximum
meter indica-
tion.
Do not change the setting of the FREQUENCY MC control after step No. 3
4
COARSE
Max cw
------
TP2
-----
cw
Holes B, C, D
Max meter indi-
RF.
cation. Reduce
RCVR TEST
SIG. ccf to keep
meter pointer
on-scale.
5
OSC -------
-------
-------
TP 1
------
cw
Hole A ------
Max meter indi-
cation.
6
FINE RF---
Max ccw
------
Remove
Headset
cw
Hole D ------
Min meter indi-
from
jack
cation.
TP 1.
7
SQUELCH -
----
----
-------
Headset
cw
Hole E max
Max meter indi-
jack
ccw.
cation.
8
SQUELCH--
------
------
-------
Headset
cw
Hole E cw --
Zero meter indi-
jack
cation, and then
plus 1/8 turn
cw.
9
Back and
-----
------
-----
Headset
cw
Hole E ------
Meter pointer
forth from
jack
should swing to
ANT to
midscale and
SQUELCH
back to zero.
Remove AN/PRR-9 from ID-1189/PR, assemble and attach to helmet. Place on head 3 to 4 feet from ID-
1189/PR. Plug ID-1189/PR antenna into RECVR ANT jack.
10
ANT.
Position where some
--------
-------
Max cw,
AN/PRR-9
Minimum noise.
noise is heard in
and
AN/PRR-9.
then
loading coil.
back to
listen-
ing
level.
CW Indicate clockwise. CCW indicate counterclockwise
Change 3
3-9
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