EFJohnson LTR 98xx, High Tier manual Call Guard Squelch, Priority Group Sampling

CONVENTIONAL FEATURES

Groups may also be programmed so that talk-around cannot be turned off. If the option switch is then pressed, neither “TA OFF” nor “TA ON” is displayed. If the menu mode is used in these cases, the current mode cannot be changed.

Call Guard Squelch

The Call Guard squelch feature eliminates distracting messages intended for others using the channel. This is done by using a subaudible tone or digital code to control the squelch. This tone or code is unique to a user or a group on that channel. It is transmitted with the voice signal but is not heard because it is in the subaudible range and attenuated by a filter. Call Guard squelch can be programmed on each conventional group. LTR operation uses ID codes to perform a similar function.

Priority Group Sampling

The priority group sampling feature ensures that messages on priority conventional groups are not missed while listening to a message on a non-priority conventional group. A fixed first and second priority group can be designated by programming or either priority group can be

the selected group. When a first priority group is selected, is

displayed, and when a second priority group is selected, is displayed (see following illustration). When scanning, this symbol is displayed only while a call is being received on the particular priority group.

When a message is detected on a first priority group while listening to a non-priority message, a tone sounds, “PRIORTY1” is flashed on the lower line of the display, and the transceiver changes to that system/group to receive the message. Likewise, if a message is received on a second priority group, “PRIORTY2” is displayed. When the priority message is

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