CTI Products TSAM Transmitter Steering & Audio Matrix - Manual (Page 43)

TSAM Installation and Maintenance Rev. 2.10 Chapter 4
CTI Products, Inc. Installation
35
4.15 Secondary Channel Checks
To verify proper secondary channel operation, complete the following test on the secondary control
wiring:
TX cable connections
•
Console 2 PTT
• Console 2 TX audio input
RX cable connections
•
1 of N Secondary Site Outputs from the console and
6 Binary Secondary Site Select inputs from the diode matrix (SS1-SS32)
• 8 Disable outputs to system comparator
• X Secondary Frequency Select outputs from the console and
4 Binary Secondary Frequency Select lines from the diode matrix into the TSAM
• 1 Reset All input from console
• 1 Console 2 RX Audio output pair to console
• 8 RX audio input pair connections to TELCO lines and bridged across system comparator.
This series of tests verifies wiring and operation of secondary dispatch functions. Systems that do not use
secondary dispatch can skip these tests.
Secondary Site Select and Site Disable Wiring
Activate a secondary site from the console. Upon activation the following sequence of steps is set into
motion.
The receiver for the selected site is disabled. The RX disable LED for that site should be visible on the
system comparator and at the console.
A tone control sequence is sent to the base at the selected site. This is monitored by connecting a line
monitor amp on the TX wireline of the selected site.
If you need to check a Function Tone frequency, you can lengthen the Function Tone Time to about 5
seconds. You can then use a use a frequency counter to measure the tone. Alternately, you can use a
stable audio generator and an oscilloscope in X-Y mode to give a stable 1:1 Lissajous pattern to check the
tones in real-time.
Repeating this step for all sites in the system will complete the secondary site select wiring tests.
Secondary Frequency Select
After completing the previous test, leave the line monitor amp connected to the last site selected. While
the secondary site is still selected, switch the site to another frequency using the console frequency select
control. A frequency change tone control sequence should be heard on the line monitor amplifier. Select
another frequency until all have been tested. Each frequency should have its own unique tone sequence.
Reset All
To test this input, turn off secondary operation. Next, connect the line monitor amp to any base station
wireline. Activate the reset all function at the console. The F1 frequency change tone control sequence
should be heard. This is the same tone control sequence sent to all system base stations, when the TSAM
is reset.