3. Tune Fault. A beep sound (tune tone) indicating
that a tuning fault exists.
4-14. Operator and organizational troubleshooting is
4. Battery Low. A clicking sound indicating battery
limited to isolating a fault to a replaceable unit or
voltage is low.
Fault isolation at this level may
accomplished using operational indications and distinct
audible tones produced within the radio set. This section
4-16. PERFORMANCE TEST. Performance tests are
corers the use of the audible tones, as heard in the
provided for the operator's and organizational level. The
handset, for fault indication and isolation by
meaning of the various audible tones available to the
operator. It also contains the radio set performance
radio set operator for fault indication and isolation is
test for complete fault isolation to the faulty! unit at the
described in table 4-3.
4-17. An operator's radio set performance test flowchart
4-15. USE OF AUDIBLE TONES. Audible tones are
using only audible tones, without test equipment, is
provided to indicate that the following basic operational
contained in figure 4-1.
4-18. Organizational level radio set performance test
1. Normal Condition. Receiver noise in handset at
turn-on, low volume sidetone when transmitting into an
setup and test flowchart are contained in figures 4-2 and
antenna or 50 ohm load.
4-3. Air Force organizational maintenance uses the
audible tones performance test in figure 4-1.
2. Tuning. A brief (1.5to 12-second) tone (tune-up
tone) while the antenna tuner performs a tune cycle.