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R-55 / Mar 2003
STEREO LINE INPUT
Internal Programming Options
All internal programming is made via PCB mounted dipswitch SW1
located on the top of the module (beneath the DB-25 connector). Note that
when a dipswitch position is thrown to the right it is ON.
Mutes
An SL-55 module can be programmed to mute speakers when the
channel is ON. The R-55 console has two mute control lines: control room
and studio. Each of these is activated by an A input source. The dipswitch
SW1 programs these muting functions:
SW1 position 4 mutes the studio when source A is ON
SW1 position 5 mutes the control room when source A is ON
Timer Restart
The console’s digital timer can be programmed to automatically reset
to zero and begin counting up when the module’s ON button is pressed.
SW1 position 6 activates timer restart
Local/Ready
The module’s channel OFF switch normally has its LED indicator
controlled by the switch itself (Local). This is the factory default setting.
However, should you wish to have the LED function as a Ready light for
an external source machine, dipswitch SW1 position 7, when thrown to the
left, passes control to the Ready input on the module’s DB-25 connector.
A closure between the Ready input (DB-25 pin 2) and Digital Ground
(DB-25 pin 19) will activate the OFF switch LED. As long as the closure
is maintained, the LED will be lit.
Talkback
Typically, one of the R-55 console’s input modules will be used for the
control room (CRS) console operator’s microphone. The third position of
the dipswitch SW1 allows that microphone to also function as a talkback
mic. It places the signal (pre-fader, pre-on/off) onto the console’s talkback
bus. When the console operator presses a TB switch on the console’s
CRS-55 Control Room/Studio module, the talkback bus (which is carrying
his microphone signal) will interrupt the regular monitor signal being fed
to the studio and talent will hear his voice through the studio monitor
speakers.
In order for the studio to reply to the console operator, the SL-55
module controlling the studio’s microphone signal must be routed to the
console’s cue bus, where it can interrupt the regular control room monitor
feed and be heard by the operator. This is accomplished by a user-supplied
TB switch in the studio. The switch provides a momentary closure
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