Apollo VP200, Руководство пользователя

Страница: 17 / 30

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.
Non-priority Scan
If the non-priority scan mode, the VP200 alternately listens on F1
and F2 for any transmission. A transmission on either channel
causes the VP200 to stop on that channel until the signal
disappears. In non-priority scan, the VP200 decodes tones on
either F1 or F2 provided the VP200 has listened to the appropriate
channel at the correct time. However, it should be noted that if
the VP200 is listening to traffic on F2 and an alert is transmitted
on F1, the VP200 will not hear that signal until the transmission
on F2 is finished. Therefore, an emergency alert could be missed
if the VP200 is listening to traffic on one channel with tones being
sent out on the other channel.
X
S
A
N
O
PE
T
O
N
C
RA
I
15