User`s guide

179
Since the Tx PL frequency serves as the transmission PL, it should
never be set identical to any of the VRS-EP's receive PLs. With Mode
Steering operation disabled, there's only one such receive PL to
consider. This is the Access PL Frequency/Code. With Mode Steering
selected however, multiple receive PL's may come into play. In this
case, the PLs to consider are the PL Frequencies/Codes on the MODE
STEERING screen ( F7 of the current screen), other than those set to
“None”. An attempt to exit from the current screen will result in a
notice being popped up if any PL clash has been overlooked.
VRS-EP Tx PL Forwarding Use the UP/DOWN arrow keys to enable/disable Transmit (Tx) PL
Forwarding. When the Vehicular Repeater System—Expanded
Protocol (VRS-EP) Tx PL Forwarding feature is enabled, the VRS-EP will
communicate received PL frequencies to the mobile radio. When this
feature is disabled, the PL frequency received from a portable radio will
not be transmitted as part of received signals.
Mode Steering Use the UP/DOWN arrow keys to select the Mode Steering behavior
desired during Vehicular Repeater System—Expanded Protocol (VRS-
EP) operation. The Mode Steering option gives the portable radios
communicating with the VRS-EP the ability to select a number of
mobile radio (Zone/Channel) modes. In other words, by assigning
unique PL codes to a set of mobile radio modes referred to as
Destinations, the portable radio user can direct the mobile radio to
specific modes. This automatic steering occurs when the portable radio
is keyed up on the portable radio channel with the appropriate PL
assignment.
This option may also be used to allow portable radios to initiate a
given set of mobile radio functions. This feature variation is obtained
by programming the appropriate function as a Destination, instead of
assigning a Zone/Channel to the selected Mode Steering PL frequency.
The choices are:
Note: Depending on the RSS version in use, some of these choices may
not be available.
Disabled Mode Steering operation turned off.
Tx Only
Steering
Transmit Only Steering. The VRS-EP will only temporarily
steer the mobile radio to the appropriate mode
destination. The mobile is kept transmitting the incoming
portable radio signal on that mode for as long as the signal
continues. The previously selected mobile Mode is
restored as soon as the portable radio stops transmitting.
Tx Steer/Rx
Latch
Transmit Steering and Receive Latching. The VRS-EP
controls the mobile radio in a manner similar to Tx Only
Steering (above) but with one difference. At this setting,
the mobile radio remains on the mode to which it has
been steered even after transmission from the portable
radio ceases.
Tx/Rx
Steerin
g
Transmit and Receive Steering. This setting results in a
Mode Steering operation similar to both preceding
operations. In this case, however, the mobile radio keeps
operating on the mode to which it has been steered (as
long as a six-second communication pause does not occur
between the portable and base station).