AEQ BC-2500
Radio Broadcast Mixing Desk
26
5.7. BC-2578 MONITORING, CONTROL AND SIGNALING MODULE.
5.7.1. Functional description
The function of the Monitoring, Control and Signaling BC-2578 module is the monitoring of
the studio and control, management of the command and intercom sends, control of the oscillator,
input of time schedules and administration of the signal circuit. It also controls the VU-meters and
pre-listen loudspeakers situated at the front of the chassis.
This module has two external stereo inputs for the monitoring of external signals.
The module can be subdivided into the following blocks:
- Control Monitor, Meters and Pre-listen Block
- Studio Monitor Block
- Command, Intercom, Oscillator and Time-signal administration Block
- Signal, Studio and Control Monitor cut Administration Block
- Remote functions Block
5.7.1.1. Control Monitor, Meters and Pre-listen Block.
This unit administers the sends to the control monitor output, the sends to the VU-meter
panel particularly the signal selected by the monitor selector SELECT, and control of the
loudspeakers and reset of the pre-listen circuit.
The following signal can be monitored:
- Master 1, by selecting (3) MASTER 1
- Master 2, by selecting (4) MASTER 2
- Auxiliary 1, by selecting (5) AUX.1
- Auxiliary 2, by selecting (6) AUX.2
- External Input 1, by selecting (7) EXT.1
- External input 2, by selecting (8) EXT.2
- Pre-listen, by selecting (9) PFL
The level of the signal or signals selected for monitoring is adjusted by the potentiometer
(10) MONITOR LEVEL.
The output for the headphones (15) H/PHONES is situated at the lower part of the module,
the output level is adjusted with the potentiometer (12) H/PHONES.
The signal for headphone monitoring is selected by (11) H/PHONES SEL/PFL. When this
feature is not activated the signals selected by the selector are monitored and when activated, the
signals sent to the PFL bus from any of the input modules are monitored.
The volume of the pre-listen monitor loudspeakers is regulated with potentiometer (13)
SPK LEVEL.
Push-button (14) PFL RESET can de-activate, in one action, all the PFL push-button that
have been pushed.
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