8 Description & Specifications
MCE-325 Programmable User Station
Bosch Security Systems, Inc.
Technical Manual
F.01U.193.228
Rev. 13
Front Panel Features
Channel Selector and Operation Buttons
These buttons have two (2) modes of operation: standard operating mode and 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. (For
operation and programming instructions, see “Operation” on page 33.) An LED located above each button provides status
information.
The MCE-325 is factory pre-programmed for 2-channel operation, with each channel having one (1) talk and one (1) listen
button. However, the MCE-325 may also be programmed so each channel selector button controls both talk and listen for a
single channel, permitting operation of up to four (4) intercom channels. Additionally, users may wish to customize the
identification of channels. With this in mind, a button kit has been supplied with the MCE-325 to allow you to customize the
button labeling to suit your particular application. Figure 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 LEDs may not be visible when viewing the MCE-
325 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 to allow the LED light to pass through. For order information, contact “Customer
Support” on page 2.
Volume Controls
CH1 (VOL 1)
:
This control adjusts the volume of CH 1 and/or CH 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 CH 2 and/or CH 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.
