Motorola MINITOR III User Manual page 9

If the alert monitor detects a transmission on
F2, it stops on F2 then listens for transmis-
sions on F1. Scanback time is programmable
and can be set to 0.5, 1, or 2-second incre-
ments. If a transmission is detected on F1, the
alert monitor switches to F1 cutting off any
transmission on F2. When switching from F2
to F1, the alert monitor listens for any tones
and alerts if the proper tones are detected. It
should be noted that the detection of tones is
very dependent on the duration of the tone
sent over the air. To ensure reliable alerting, it
is recommended that this feature only be
used when the first tone duration transmitted
is one second or more.
During the scan mode, the amber LED blinks
fast to indicate transmission on F1 and at a
slower rate for transmission on F2.
Non-priority Scan
In the non-priority scan mode, the alert moni-
tor alternately listens on F1 and F2 for any
transmission. A transmission on either chan-
nel causes the alert monitor to stop on that
channel until the signal disappears. In non-
priority scan, the alert monitor decodes tones
on either F1 or F2 provided the alert monitor
has listened to the appropriate channel at the
correct time. However, it should be noted that
if the alert monitor is listening to traffic on F2
and an alert is transmitted on F1, the alert
monitor will not hear that signal until the trans-
mission on F2 is finished. Therefore, an emer-
gency alert could be missed if the alert
monitor is listening to traffic on one channel
with tones being sent out on the other chan-
nel.
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