Channel frequencies are pre-programmed in the WatchDog programmer and then are
available for selection in the pager’s display menu.
WatchDog Special Applications to Extend the
On / Off Duty Function
The On / Off Duty function is available to be programmed as a function on any position
of the three position function switch. The Off Duty function can be assigned to any
switch position and to any channel of operation. Check the “Off Duty” box in the
programmer for those tones/addresses that you want to DISABLE when the function
switch is in the “Off Duty” position.
This function can also be extended in multi-frequency models by programming channels
to the same operating frequency. For example, you can program CH2 to be the same
operating frequency as CH1. Then you can assign tones and addresses in CH1 and CH2
as you require for the On / Off Duty function. When on duty, you select a three position
switch position that is programmed for F1 and when off duty you select a three position
switch position that is programmed for F2 operation.
Using this method combined with the On / Off Duty set on the function switch can
expand the alerting address capabilities of the pager. This concept can be repeated using
CH3, CH4 and CH5. Depending upon your alerting requirements, you can use any
combination of channels to provide unique alerting features to accommodate many
applications.
You might require more than one primary channel, both having an On / Off Duty
function. This can be done using 4 channels, each programmed with specific sets of
address tones.
Revert or Auto Reset with N Time Delay and Voice Memory Operation
There are two normal operating modes commonly used in public safety communications
systems with reference to transmissions of tones and voice messaging. The first method
is to transmit tones with voice messaging immediately following the tones, and no
disruption in the continuous transmission of the carrier. If your system uses this mode of
operation, then the N time delay should not be used.
The second system mode allows the carrier to drop following the transmission of tones
for about one second, then up again to process voice messaging. If your system utilizes
this mode and your WatchDog is equipped with voice memory, selection of “revert with
N time delay” is recommended. Why?
Message recording in most voice pagers use the end of the alerting cycle to signal the
voice memory device to begin recording and use the carrier squelch function to control
when to stop recording. The end of a pager’s alerting cycle is normally controlled by the
end of the second tone in a two tone sequential transmission, or the end of the long tone
in a single tone transmission. In systems that drop the carrier after tone transmissions,
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