ATR833 / P/N 833-(1xx)-(1xx)
Operation and Installation
2.5.5 DUAL Watch
The ATR833 owns one receiver, therefore, DUAL-Watch (listen to two
frequencies) happens alternately between the active and the standby
frequency.
By pressing the
key DUAL Watch is activated, pressing
again
deactivates it.
The two frequencies, the receiver shall alternately listen to, should be
entered before activating DUAL Watch, since changes in the standby
frequency would deactivate this mode again.
Another important precondition is the setting of the Squelch value (SQ).
It must at least be set to
SQ: 02
(SQ-setting see 2.4.2). Only if a noise
suppression takes place, it can be evaluated whether nothing is received
on the active frequency.
SQ must be set to a value that is is at least 02, because
otherwise no noise reduction would happen, in this case it
would not be possible to determine if a reception takes place
or not.
When the DUAL Watch is activated, DUAL will be shown in the third line.
When there is no reception on the active frequency, the receiver
switches to the standby frequency. The active frequency has priority and
it is monitored every 2 seconds for a duration of 0.3 seconds. If reception
on the active frequency is recognized again, the monitoring of the
standby frequency is interrupted until no reception takes place on the
active frequency.
Which frequency is currently monitored will be shown behind RX: “
RX^“
” if the active frequency is monitored and “
RX_
“ ” if the Standby-
Frequency is monitored.
In DUAL Watch Mode it is possible to switch between the standby-
frequency and the active frequency. Transmission is always done on the
active frequency.
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Dokument-Nr.: 01.1402.010.71e / Revision: 1.01