Service Manual

VRS Mobile-TX

Acknowledgment

Tones

(Conventional Only)

When this option is enabled, the VRS transmits a 750 Hz feedback

tone after it has received a repeatable message on the portable

frequency. This signals the portable operator that the transmission was

received. If the repeated message was cut short due to the mobile TOT

being exceeded or the mobile channel being changed during the

repeat, a lower-pitched tone (304 Hz) sounds. If the portable user does

not hear a tone after completing a transmission, the portable is either

out of range of the repeater or there is no priority repeater in the area.

See “VRS Mobile Trunking Tones (Trunking Only)” on page 38 for a

description of trunking acknowledgment tones.

Flashing Display The Flashing Display feature causes the display on the control head to

alternate between the current mode and “VRS BOTH.” This feature is

used primarily when the VRS enable/disable button does not have an

indicator light or when VIP activation is used. This feature is normally

disabled in CPS. The length of time “VRS BOTH” is displayed every

6 seconds is determined by the “temporary message display timer”

value. This value (from 250 to 6250 ms [default = 1000 ms]) can

be programmed by the CPS. To conﬁgure, select Radio Conﬁguration

--> Display & Menu --> Advanced screen.

Repeater PPI The Repeater Portable Priority Interrupt (PPI), when enabled, causes a

base-to-portable transmission to be interrupted every 1 second in

trunked mode or 2 seconds in conventional mode so that the repeater

can search for a portable radio signal. (These times are programmable

and may be changed to 500 ms for trunked or 500 ms for conventional

modes). This interruption may be heard on the portable as a “clicking”

noise, but PPI is necessary to give the portable user priority over base-

to-portable transmissions, for the self-clearing function of the

automatic priority resolution feature, and to allow portable users in

trunked mode to break in during system hang time to prevent loss of

voice channel. This feature may be disabled through CPS.

Quick-Key This feature allows the portable user to determine the status of the

mobile trunking system. The feature is initiated by a short press of the

portable’s PTT that is long enough for the VRS to key the mobile and

access the trunking system, for less than 1 second in duration.