HEADQUARTERS OH-58A - Page 148

TM 55-1520-228-10
CONTROL/INDICATOR FUNCTION
6. MODE 4 Switch
ON...................................................................... Enables the set to reply to MODE 4 interrogations.
OUT.................................................................... Disables the reply to MODE 4 interrogations.
7. AUDIO-LIGHT Switch
AUDIO ...................................................................... Enables aural and REPLY light monitoring of valid
MODE 4 interrogations and replies.
LIGHT ............................................................... Enables REPLY light only monitoring of valid MODE
4 interrogations and replies.
OUT .................................................................. Disables aural and REPLY light monitoring of valid
MODE 4 interrogations and replies.
8. CODE Control ............................................................... Holds, zeroizes or changes MODE 4 code.
9. M-1 Swtich
ON...................................................................... Enables the set to reply to MODE 1 interrogations.
OUT.................................................................... Disables the reply to MODE 1 interrogations.
TEST.................................................................. Provides test of MODE 1 interrogations by
indication on TEST light.
10. REPLY Indicator .......................................................... Lights when valid MODE 4 replies are present, or
when pressed.
NOTE
Computer must be installed before set will reply to a MODE 4 interrogation.
11. M-2 Switch
ON...................................................................... Enables the set to reply to MODE 2 interrogations.
OUT.................................................................... Disables the reply to MODE 2 interrogations.
TEST.................................................................. Provides test of MODE 2 interrogation by indication
on TEST light.
12. TEST Indicator ............................................................ Lights when the set responds properly to a M-1,
M-2, M-3/A or M-C test, or when pressed.
13. M-3/A Switch
ON...................................................................... Enables the set to reply MODE 3/A interrogations.
OUT.................................................................... Disables the reply to MODE 3/A interrogations.
TEST.................................................................. Provides test of MODE 3/A interrogations by
indication on TEST light.
14. M-C Switch
ON...................................................................... Enables set to reply to MODE C interrogations.
OUT.................................................................... Disables reply to MODE C interrogations.
TEST.................................................................. Enables TS-1843/APX to locally interrogate set.
Figure 3-13. Transponder APX-72 Control Panel
A (Sheet 2 of 2)
3-26 Change 10