E.F. Johnson Company 98xx LOW TIER, Руководство по эксплуатации

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MISCELLANEOUS
35
When a message is detected on a priority channel while listening to a
non-priority message, a tone sounds (unless tones have been disabled)
and the transceiver changes to that channel to receive the message. When
the priority message is complete, the transceiver returns to the previous
channel, and if a message is still present, it is received.
When a priority channel is sampled while listening to a message on
some other channel, a series of “ticks” may be heard. These ticks are brief
interruptions of the audio signal that occur when sampling takes place. If
an AUX option switch is programmed for this feature, priority sampling
can be turned on and off. When it is enabled by the switch, the decimal
point indicator for that switch is lighted. If this switch is not available,
priority sampling is either enabled or disabled on all conventional chan-
nels by programming.
NOTE: Priority sampling occurs only when scanning is enabled by the
SCAN switch and when listening to a message on a conventional non-
priority channel. It does not occur when listening to an LTR call or when
transmitting.
MISCELLANEOUS
Supervisory Tones
The following tones are heard at various times when operating this
transceiver. Some or all of these tones can be disabled by programming as
described in “Tone Select” on page 25.
Busy Tone - This tone is similar to the standard telephone busy tone, and
it indicates that the radio system is currently busy. It sounds with all LTR
calls, but not conventional calls. Repeated access attempts are made
while the PTT switch is pressed with this tone sounding. Therefore, it is
not necessary to release the PTT switch to access the system.
Intercept Tone - This is a siren-like tone (alternating high and low tones)
which indicates the following out-of-range and error conditions: