CTI Products TSAM Transmitter Steering & Audio Matrix - Manual (Page 16)

TSAM Installation and Maintenance Rev. 2.10 Chapter 2
CTI Products, Inc. Main Channel Operation
8
2.3 Initial Transmitter Selection Options
If you have made it this far in the manual, you're probably saying, "Okay, I understand how the Instant
Update and End of Receive Update Modes work, but what happens after the system has been quiet for a
while? Which transmitter is used?" (At least I thought I heard you say that.)
The Initial Transmitter Selection Update Options determine which transmitter is selected on an initial
transmission:
1. Home Transmitter selects a customer-programmed Home transmitter after a period of inactivity.
This is usually selected as the central transmitter or the transmitter with the best coverage.
2. Dynamic Update Mode is a combination of Instant Update/First Receive Mode and End of
Receive/Smart-Steer™ mode. It works well for repeater systems in which the mobiles units will be
talking primarily with units in the same area.
3. Dynamic Multicast Mode is a combination of Multicast Mode and End of Receive/Smart-Steer™
mode. This is only available with TSAM units that have Secondary capability. It can be used in very
wide-area systems, especially in repeater systems in which the mobiles will be talking with widely
dispersed mobiles. The first transmission (from the console or a mobile) is transmitted over many (or
all) transmitters. Normal steering will be done on subsequent transmissions.
4. Force Selection: Although this is not a programmed mode in the TSAM, the dispatcher can always
manually force select a transmitter from the console. See section 4.6, TX Select Console Wiring --
Diode Matrix Plug / Schematic for console connections.
2.3.1 Home Transmitter / Transmit Revert Timer
(TSAM Version 1.20 and up)
Using this mode, the first transmission (from a mobile or console) will be made over a customer-
programmed default "Home" transmitter. Subsequent transmissions are steered normally.
After a customer-programmed period of inactivity has passed, the system will again revert to the Home
transmitter. A period of inactivity is any period when there are no Voted signals, Forced Site Selections,
or Console/Repeater PTTs.
The Revert Timer starts to run at the end of the last detected activity. If any new activity occurs, the timer
is reset and held until the activity ceases. When the timer expires, the TSAM then steers the to the HOME
A transmitter. If secondary operation is used and the HOME A transmitter is being used in the secondary
mode, the TSAM reverts to the HOME B transmitter. After the end of activity, the revert timer starts
running again. On the next expiration of the revert timer, the TSAM checks for the availability of the
HOME A transmitter. If HOME A is available, the TSAM the reverts from HOME B to HOME A. If
HOME A is unavailable, the TSAM remains on HOME B. This cycle continues until HOME A becomes
available.
Transmit Revert Timer Programming
The revert timer is accessed through the TSAMs steering options menu. See section 4, Setting
Programmable Options of the TSAM Maintenance and Installation Manual, for information on accessing
the programming menus.
The Revert Timer can be programmed from 5 seconds to 32,767 seconds (9 hours 6 minutes and 7
seconds). Additionally, the timer can be programmed to revert off. With revert off, the TSAM remains on
the last steered site indefinitely. The TSAM is shipped with the revert timer set to 15 seconds. To
program the timer to off, enter any number between 32768 and 65535 into the timer. Any number in this