CTI Products TSAM Transmitter Steering & Audio Matrix - Manual (Page 25)

TSAM Installation and Maintenance Rev. 2.10 Chapter 3
CTI Products, Inc. Secondary Channel Operation
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3.2 Secondary Site Select "Off"
1. This function terminates secondary operation and returns the secondary base to the Main steered
channel.
2. Secondary Operation is terminated when all secondary select inputs return high (active low
inputs).
3. The TSAM mutes C2 RX Audio.
4. The TSAM sends the F1 frequency change tone sequence to the secondary base.
5. The TSAM re-enables the receiver by releasing the Disable line to the receive comparator. The
TSAM marks the reverted transmitter as being available for transmitter steering in internal
memory.
3.3 Alert Tone Generation
If an attempt is made to transmit on the secondary channel when no secondary site is selected, a warning
tone is sent to the console. The warning tone is generated by the secondary keying tone generator and
routed through the cross-point audio switch to the secondary console RX audio line driver circuit.
3.4 Secondary Channel PL Monitor Control
Unit Versions 1.70 and up / Secondary System Only
The TSAM can control PL Monitor on the Secondary system. One of two modes may be selected,
Momentary Mode or Sustained Mode.
Momentary PL Monitor is used to check for activity on a Secondary channel before transmitting. It
functions much like a PL monitor on a typical remote control unit. The operator presses a momentary PL
Monitor button, and the base station remains in monitor mode until the next transmission.
Sustained PL Monitor is used to operate a Secondary station in a pseudo carrier squelch mode. This
allows the operator to hear traffic from mobile units that do not transmit the proper PL tones. It requires a
latched console output. The TSAM will generate a PL Monitor tone sequence after each transmission as
long as the PL Monitor input is active.
The PL Monitor function is sent out as two tones:
HLGT + PL Monitor Tone.
Some stations will not decode a new tone command immediately after a transmission or another tone
command. The PL Monitor Delay time is a dead time that allows the station tone decoder to reset before
the PL Monitor tone is sent.
When an operator de-selects a secondary station, the TSAM sends the F1 keying tone or F1 Revert tone to
the station. The station should go back into normal (guarded) PL mode when it changes back to F1.
Program the PL Monitor Control parameters from the Secondary menu:
PL Monitor Tone Timing is shown in sections 7.2 and 7.3.