TM 55-1510-215-MTF
K11. HF communications loud and clear at one power setting but
not at others.
a.
Defective amplifier-coupler.
b.
Defective HF control panel.
K12. HF transmitted or received signal or sidetone not clear (SV model)
a.
Incorrect fill register data.
b.
Defective voice security computer.
K13. No FM receiver noise.
a.
Defective FM liaison set.
b.
Interference from Carousel IV-E blower motor.
K14. FM SQUELCH switch does not squelch receiver noise.
Defective FM liaison set.
K15. Cannot establish FM two-way communication (single channel mode)
a.
Defective FM liaison set.
b.
Defective antenna or cabling.
c.
Defective voice security computer.
d.
Defective audio control panel.
e.
EMI from Carousel IV-E blower motor (AN/ARC-186 only).
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