Telex MCE325 manual Front Panel Features, Connections, Inputs and Outputs, Volume Controls

Front Panel Features

Channel Selector and Operation Buttons

These buttons have two modes of operation: standard operating mode and program, or setup, mode. The printing on the face of each button indicates its function in standard operating mode; printing under each button indicates its setup mode function. (See Section 3 for operation and programming instructions.) An LED located above each button provides status information.

The MCE325 is factory pre-programmed for two-channel operation, with each channel having one talk and one listen button. However, the MCE325 may also be programmed so that each channel selector button controls both talk and listen for a single channel, permitting operation of up to four intercom channels. Additionally, users may wish to customize the identification of channels. With this in mind, a button kit has been supplied with the MCE325 to allow you to customize the button labeling to suit your particular application. Figure 1.11 shows the available button caps as well as some typical button configurations.

NOTE The standard buttons are opaque. As a result, the front panel LED’s may not be visible when viewing the MCE325 from a low angle (such as when it is mounted high in an equipment rack). As a remedy for this problem, clear buttons are available that allow the LED light to pass through. (Order RTS™ part no. 9000-2698-800)

Volume Controls

CH1 (VOL 1): This control adjusts the volume of channels 1 and/or 3 to the left headphone when stereo headphones are used. It adjusts the mono mix level of these channels when monaural headphones or an external speaker is used.

CH2 (VOL 2): This control adjusts the volume of channels 2 and/or 4 to the right headphone when stereo headphones are used. It adjusts the mono mix level of these channels when monaural headphones or an external speaker is used.

PGM VOL: This control adjusts the mono mix of program A and program B (input at the rear panel and assigned via internal programming) to the headphones and external speaker.

Sidetone Nulling Trimmers

These trimmers are adjusted to prevent acoustic feedback when using a panel microphone along with an external speaker.

Connections, Inputs and Outputs

Front Panel

DYNamic MIC HEADSET: This connector accepts a stereo-earphone, dynamic-microphone headset (with or without a mic on/off switch).

CARBon MIC HEADSET: This connector accepts a standard 3-conductor, ¼-inch phone plug. The necessary phantom power is provided to power a carbon microphone or its electronic equivalent.

Panel Microphone Jack

The MCE325 may be optionally fitted with a gooseneck panel microphone by removing the blanking plug located in the upper-right corner of the front panel. The panel microphone jack accepts specially made gooseneck microphones (MCP-90 series), which are available from RTS.

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