Instant update mode, 1 instant update mode – CTI Products TSAM Transmitter Steering & Audio Matrix User Manual
Page 14
TSAM Installation and Maintenance Rev. 2.10
Chapter 2
CTI Products, Inc.
Main Channel Operation
6
2.2.1
Instant Update Mode
Instant Update Mode updates the steered transmitter as soon as the Free-vote timer has expired at the
beginning of a portable/mobile transmission. It is used only with the First Receiver Vote option enabled.
This mode mode is cannot be used with the Smart-Steer™ voting algorithm.
If you have a repeater system and the units will be talking between sites, the Instant update mode has
limitations. In this case, the unit will transmit from the transmitter closest to himself, not necessarily from
the transmitter closest to the person to whom he is talking.
2.2.2
End of Receive (EOR) Update Mode / Ping-Pong Repeater
Operation
As described above, instant update of the steered site may be undesirable for repeater systems. When a
portable/mobile is repeated, it would ideally be transmitted on the site closest to the person to whom he is
talking. The End of Receive Update Mode allows this. In this mode, the TSAM switches to a unit's
closest transmitter at the end of his transmission. Thus, the response to him will come over his transmitter.
This will allow a "ping-pong" selection of transmitters with two mobiles in different areas as shown in
Figure 3.
CA-80437-100
Site A
Site B
Home Site
Car A
Car B
Transmission 1
Transmission 2
Transmission 3
Figure 3 Repeater Ping-Pong Operation with End of Receive Mode
In this example, the following happens:
1. Car A transmits and is received on Receiver A.
Car A is repeated over the Home Site (which has the best coverage).
(Home site Revert will be discussed in section 2.3, Initial Transmitter Selection Options.)
When Car A finishes his transmission, the TSAM unit steers to Transmitter A.
2. Car B answers through Receiver B and is repeated over Transmitter A.
When Car B finishes his transmission, the TSAM unit steers to Transmitter B.
3. Car A answers. It is received through Receiver A and repeated through Transmitter B.