Motorola VRS750, Service Manual

Page: 37 / 104

25
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.)
Zone/Chan
The VRS will command the ASTRO mobile to change to the mode
programmed by the CPS. Once the mobile has steered, it will follow
the conventions of the type of steering selected (for example,
Transmitter Steering/Receiver Latching).
Select Mode
The VRS will command the ASTRO mobile to return to the last mode
selected by the rocker switch on the control head. If the portable user
has steered to another mode, and the selected mode is changed in the
car, the steering will be canceled until the VRS receives another mode
steering PL.
Emergency Alarm
The VRS will initiate an Emergency Alarm through the ASTRO mobile,
if the mobile is programmed for this type of Emergency, in the same
manner as if the Emergency button on the control head were pressed.
The type of Emergency (trunked or conventional) depends on the
currently selected mobile mode, (trunked or conventional,
respectively).
The VRS will only generate an Emergency, not perform a portable-to-
base audio repeat, while the portable is transmitting on an
“Emergency request” channel. This feature is typically implemented
in the portable, using a one-touch button that has been programmed
for Emergency-revert to a channel with the proper PL.
Although the portable generates MDC tones, the VRS cannot decode
MDC. Instead it responds to the PL of the portable mode on which the
Emergency MDC tones are transmitted. All of this is transparent to the
user.
Message
The VRS will command the ASTRO mobile to send out a CPS-
programmed message on the mode currently displayed on the control
head, in the same manner as if the request to send a message had been
generated using the control head. The VRS will send out only one
message per received portable signal. No mode steering will occur; the
currently steered/latched mode and the selected mobile mode will
remain as they were before the request to send a message was received.
If the message selected is valid, the VRS will transmit to the portable
the mobile tones indicating whether or not the valid message was
acknowledged. If the message selected is invalid, (either incorrectly
programmed in CPS or not a valid message for the currently displayed
mode), the VRS will send a low-pitched alarm tone to the portable.
To generate a message request, the portable user would:
• select the channel on the portable programmed for the message
request,