User's Manual

In-Car Monitor
The "In-Car Monitor" (ICM) feature is for use in a two-man operation where one user
(user 1) is out of the vehicle while the other (user 2) remains in the vehicle. This allows
user 2 limited access to both mobile and portable communications when the VRS is on,
even when the repeater is the priority unit. ICM operation is set to BOTH.
ICM Transmissions
VRS BASE:
Press the mobile's PTT to transmit on the frequency corresponding to the mode shown on
the control head’s display. If this mobile’s VRS is the priority unit (in delay state zero),
the VRS unit will then become non-priority upon the mobile PTT. If you press the
mobile's PTT during portable-to-base VRS activity, a talk-prohibit tone sounds and the
mic audio is disabled.
VRS BOTH:
Press the mobile's PTT to transmit simultaneously on the frequency corresponding to the
mode shown on the control head's display, and the portable frequency. Use the ASTRO
CPS to enable the VRS TX PL generator option to transmit with the proper PL frequency.
If you press the mobile's PTT during portable-to-base VRS activity, a momentary talk-
prohibit tone sounds and the microphone audio is disabled.
When using VRS BASE or VRS BOTH mode, all mobile transmissions are on the mode
that is shown on the control head's display. If the VRS is currently steering to another
mode, that steered mode will be displayed on the control head. Any mobile transmissions
will be on that new mode until the portable steers the VRS back or the mode rocker
switch is used to change modes. If the mode rocker switch is used to change modes, the
portable user will not be made aware of this mode change. With Ack Tones are enabled,
the portable user will hear a "bad" tone if the mode is changed during the transmission.
VRS Reception
The VRS option has no effect on mobile radio squelch control or normal mobile radio
reception. The VRS portable unit's squelch setting is not user adjustable. Portable audio is
heard from the mobile speaker of the priority VRS unit as shown in the following table:
Mobile Microphone Portable Audio Heard from Mobile Speaker
On HUB PL*
Off HUB CSQ
* = any valid repeater access PL
Repeated portable transmissions will always be heard from the mobile speakers.
Portable transmissions without proper PL will only be heard from the mobile speaker if
the microphone is off HUB.
Mobile Audio Repeat
The VRS transmits to the portable when audio unmutes the mobile speaker. This allows
the user to set the monitor button "on" to defeat the coded squelch requirements of the
mobile radio on a base-to-portable transmission or "off" to prevent the VRS from