Owner`s manual

M O N O M I C I N P U T
page 2 – 4
RD-12 / March 99
Tallies
Turning the module ON can activate a remote tally indicator. There are
three tally control lines: on-air, tally 2 and tally 3. The first three positions
of dipswitch SW6 (to the left of the fader) program these functions:
SW6 position 1 activates the on-air tally control line*
SW6 position 2 activates tally 2
SW6 position 3 activates tally 3
Utility Bus Pre-Fader
Dipswitch SW6 position 4, when activated, will cause the module
signal assigned to the console’s UTL output to be tapped before the fader
and the channel ON/OFF switches.
Talkback
Typically, one of the console’s RD-12 input modules will be used for
the control room (CR) console operator’s microphone. The fourth position
of dipswitch SW1 allows that microphone to also function as a talkback
mic. It places the signal (post-insert, pre-fader, pre-on/off) onto the
console’s talkback bus. When the console operator presses a TB switch on
the console’s SCD-5 Studio Control 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 MMD-5
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
between the module’s lower DB-25 connector “TB to CR A” or “TB to CR
B” control pins and Digital Ground (see page 2-6 for wiring details). As
long as this closure is maintained (i.e., as long as talent holds down the
studio TB button) the module’s (post-insert, pre-fader, pre-on/off) signal
will be placed on the console’s Cue bus. Simultaneously, the module’s
regular output will be muted (i.e., Cough will be activated) so the talkback
signal doesn’t go out over the air.
It is also desirable to mute the studio monitor speakers during talkback
operations, not only to reduce ambient noise (i.e., the regular studio
monitor signal) but also to prevent potential feedback if both the operator
and the studio talent press their respective TB buttons at the same time.
Dipswitch SW 5 programs the appropriate muting:
Dipswitch position 1 mutes studio one when microphone A is live
Dipswitch position 2 mutes studio two when microphone A is live
Dipswitch position 3 mutes studio one when microphone B is live
Dipswitch position 4 mutes studio two when microphone B is live
Remote tallies are
hooked-up to the console
at the Control Room mod-
ule (CRD-5)
*factory default setting