User's Manual

VRS. The portable operator sets the channel or mode select switch to the position
corresponding to the desired mobile mode and keys up the portable. The VRS unit
decodes the PL tone and steers the mobile radio to the desired mode. There are two types
of steering supported: Transmitter Steering/Receiver Latching, and Transmitter
Steering/Receiver Steering.
NOTE: If mode steering is not selected during CPS programming, the programmer
will need to enter the repeater access PL, which corresponds to a single access PL with
select mode steering.
Steering Types
o <Transmitter Steering/Receiver Latching> - On portable-to-base repeating, the
mobile radio is steered to the proper mode as determined by the received PL from the
portable. When the portable dekeys, the condition to repeat ceases, and the mobile radio
remains on this mode. Thus, all future base-to-portable repeating is heard via the mobile
mode last steered by the portable.
The mobile control head will display the steered/latched mode. If, sometime after
this operation and while no repeat is occurring, the ICM user keys the mobile with the
micropnone's PTT button, the mobile will now transmit on the latched mode that is
displayed on the control head. If, however, the in-car-monitor (ICM) user changes the
selected mode using the mobile's mode rocker switch before pressing the mic PTT, the
mobile will now transmit on the new selected mode.
NOTE: For the above type of steering, the portable user will be able to steer back
to the selected user mode on the control head by programming one PL destination for
Sel-Mode. However, the selected mode can be changed by the rocker mode switch.
o <Transmitter Steering/Receiver Steering> - On portable-to-base repeating, the
mobile radio is steered to the proper mode as determined by the received PL from the
portable. When the portable dekeys, the condition to repeat ceases, and the mobile radio
remains on this mode for 6 seconds. During this 6 seconds, the VRS waits for a
repeatable base-to-portable transmission to be received.
• If a base-to-portable transmission is not received, the mobile will return to the last
mode selected by the control head's rocker switch (current user-selected mode).
• If a base-to-portable transmission is received during the 6-second timer, the timer
will be reset back to 6 seconds and start over at the end of the transmission.
• If the portable is keyed during the 6 seconds, the VRS will handle the destination
PL accordingly and reset the timer. If the 6-second timer has not expired, no
repeat is occurring, and the ICM user keys the mobile with a microphone PTT, the
mobile will transmit on the steered mode and the 6-second timer will start over at
the end of the transmission.
Steering Destination Types
There are five types of actions, or "steering destination types," that the VRS can be
programmed to perform as a result of receiving a portable transmission with the specified
PL:
NOTE: Each receive PL can only be used once and can only be programmed with
one type of steering destination (for example, a single PL cannot be programmed to both
change the mobile mode and send a message.)