CTI Products TSAM Transmitter Steering & Audio Matrix - Manual (Page 42)

TSAM Installation and Maintenance Rev. 2.10 Chapter 4
CTI Products, Inc. Installation
34
4.14 Main Channel Checks
Proper connection of the TSAM Main channel controls is verified by performing the system checks that
follow.
Note:
The following test is intended as a quick verification of basic system functions. A comprehensive
system test must be performed after final installation and level setting is complete.
The following procedure tests these connections:
• TX Audio line outputs to base station wirelines
• Console 1 PTT
• Console 1 TX audio input
• TX Select I/O connections to console
• RX Voted inputs from system comparator
TX 1-8 Audio Line Outputs
Connect a line monitor amplifier on the TX 1 transmitter audio line, apply power to the TSAM. Verify
that the MSTR LED lights on the master TSAM. You should hear the RESET ALL tone sequence on the
monitor amplifier. This sequence is sent on all TX line outputs to return all base stations to F1.
Console 1 PTT
Check for proper PTT operation by keying the main channel PTT switch from the console. A keying tone
sequence will be generated on the TX audio line output to the currently steered transmitter. When the
TSAM is reset, the currently steered transmitter is set to the HOME A transmitter. HOME A is set to TX 1
at the factory.
Once PTT operation is verified, check for console transmit audio on the steered TX audio line.
TX Select I/O Wiring
Manually select another TX site by pressing the site FORCE VOTE / TX SELECT button on the console.
After the site is selected, the TX LED for the site will light. If this does not function, trace the FORCE
VOTE / TX SELECT line from its source on the console, through the diode matrix to the TSAM. . Repeat
this process for each site, and correct any wiring problems as they are discovered
While any site select button is pressed, the FORCESEL line and the associated TX SEL line should be
low. Be sure the FORCESEL line is not stuck low when no Site Select button is pressed. The TSAM
starts a force select action when the FORCESEL line goes from High to Low.
RX Voted Input Wiring
Eight RX Vote indicate lines from the comparator connect to the TSAM TX connector P101. These lines
indicate to the TSAM when a signal is received and which site is receiving the best signal. Based on this
information, the TSAM determines the steered transmitter.
To test this wiring, force vote a receiver on the system comparator. LED1 will light indicating that vote
activity has been detected. On consoles equipped with comparator display, a vote indication for the forced
receiver will activate.