The GSGC24A has an inbuilt three channel mixer, each of the channels are mic/ line switchable and have +12v phantom power available. Each of these channels has a gain control, large on/off pushbuttons & an on indicating LED. The mixed output of these channels are fed through a compressor/ limiter and are sent to the Codec, this output is also on a rear panel phono socket. There is a 7 LED PPM for indication of the mixer output level.
One internal headphone amplifier is provided, with the output in parrallel on 2 front panel A or B guage jack sockets. Two front panel pots control the level to the headphone amplifier of the output of the mixer and the return cue from the Codec.
A record output (on a rear panel phono socket) is a mix of the output of the GSGC24As mixer and the return programme cue line.
A cue output (the return audio from the codec) is available on a rear panel phono socket.
For ISDN line dialling, answering and Codec set up functions a front panel keypad is provided. The G722/ G711 Codec has a large green LED to show when Codec lock is O.K. and also a large red LED to show when an ISDN line is open.
The GSGC24A can be powered from 2 cells (approximate battery life of 4 hours) or an external plug top psu. If it is being powered from the external supply and the supply fails the batteries will automatically take over. A front panel LED shows when the GSGC25 is switched on and flashes to indicate when battery level is low.