TM 55-1510-220-10
(c)
OUT. Disables mode 4 operation.
(15)
MODE 4 code control. Selects preset mode 4
code.
(16)
M-C, M-3A, M-2, and M-1 switches. Select
test or reply mode of respective codes.
(17)
TEST. Activates self-test of selected code.
Transponder can also reply
(18)
ON. Activates normal operation.
(19)
OUT. Deactivates operation of selected code.
(20)
MODE 2 code selectors. Select desired reply
codes for Mode 2 operation. The cover over mode select
switches must be slid forward to display the selected mode 2
code.
(21)
POS IDENT pushbutton (control wheels, fig.
2-18). When pressed, activates transponder identification
reply.
c.
Transponder Normal Operation.
(1)
Turn-on procedure: MASTER switch STBY.
Depending on the type of receiver installed, the TEST/MON
NO GO indicator may illuminate. Disregard this signal.
(2)
Test procedure:
NOTE
Make no checks with the master switch in
EMER, or with M-3/A codes 7600 or 7700
without first obtaining authorization from
the interrogating station(s).
1.
Allow set two minutes to warm up.
2.
Select codes assigned for use in modes
1 and 3/A by depressing and releasing
the pushbutton for each switch until the
desired number appears in the proper
window.
3.
Lamp indicators Operate press-to-test
feature.
4.
M-1 switch Hold in TEST. Observe
that no indicator lights illuminate.
5.
M-1 switch Return to ON.
6.
Repeat steps 4 and 5 for the M-2, M3/A
and M-C mode switches.
7.
MASTER control NORM.
8.
MODE 4 code control A. S(et a '-,d-.
in the external computer.
9. MODE 4 AUDIO OUT switch -OUT.
(3)
Modes 1, 2, 3/A, and/or 4 operating
procedure:
NOTE
If the external security computer is not
installed, a NO GO light will illuminate
any time the Mode 4 switch is moved out of
the OFF position.
1.
MASTER control NORM.
2.
M-1, M-2, M-3/A, and/or MO)DE 4
ON-OUT switches ON. Actuate only
those switches corresponding to the
required
codes.
The
remaining
switches should be left in the OUT
position.
3.
MODE 1 code selectors Set (if
applicable).
4.
MODE 3/A code selectors Set (if
applicable).
5.
MODE 4 code control Set (if required).
6.
MODE 4 REPLY indicator Monitor to
determine when transponder set is
replying to a SIF interrogation.
7.
MODE 4 AUDIO OUT switch Set (as
required
to
monitor
Mode
4
interrogations and replies).
8.
MODE 4 audio and/or indicator Listen
and/or
observe
(for
Mode
4
interrogations and replies).
9.
IDENT-MIC-OUT
switch
Press
to
IDENT momentarily.
10.
MODE
4
TEST-ON-OUT
switch
TEST.
11.
Observe that the TEST GO indicator
light illuminates.
12.
MODE 4 TEST-ON-OUT switch ON.
13.
ANT switch BOT.
14.
Repeat steps 4, 5, and 6. Observe that
the TEST GO indicator illuminates.
3-82
