Console Installation
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4. Check the audible alarm by pressing any non-programmed key. The alarm (two
beeps) is heard on the select speaker.
5. If the system is operating correctly up to this point, then make all necessary level
adjustments. These adjustments are described in the next section.
Level Adjustments
In order to provide optimum performance, the audio levels at every input and output of the
system must be adjusted. The maximum amount of gain in an audio path is usually never
required. This adjustment procedure will set the gains to the minimum for the required
audio level that will keep the noise level at the lowest possible. Adjustments are necessary
for each channel, as well as each microphone and external audio input to the console.
gives a summary of adjustments to be made and the location of the adjustment.
Adjustments should only be made once the configuration, wiring, and preliminary system
check have been completed. Also, levels are best adjusted when the system is connected to
the intended radio base stations.
Table 11: Level Adjustment Locations
Receive Audio Adjustment
The receive audio on the Dual Channel Card should be adjusted first. Each channel has the
adjustments labeled on the back of the console. While a 1000 Hz tone with audio level
-12dBm (.193 mV AC RMS) is being applied to the channel receive audio input (2W-RX
or 4W-RX depending on base-station), the level at the channel RXA (odd channel) or
RXB (even channel) test point on the card should be measured. Access to the test points
(P1) is gained from inside the unit (top cover open) at the upper portion of the card nearest
the front panel. A cable with flying leads and the appropriate connector (709-7330) is
Note
Unless otherwise requested, receive, transmit, and transmit
monitor audio levels have been factory adjusted to 0 dBm. Final
adjustments should be made on site during normal working
conditions.
Adjustment
Location
Channel Receive Level
Back of Console
Channel Transmit Level
Back of Console
Console Microphone Level(s)
Inside Console
Minimum speaker levels
Inside Console
