page 2 – 3
D-70 / Apr 2000
INPUT MODULE
Internal Programming Options
Internal programming for the mono mic module is made via printed
circuit board (PCB) mounted jumpers on the module’s MMADC-70 input
card.
For the purposes of this manual, we will assume you are holding the re-
moved module upright, component side towards you, with gold-plated card
fingers to the left and the module faceplate to the right. This will enable you to
read the control legends silkscreened next to each programming jumper.
Insert Bypass
Jumper J1(located at the center of the MMADC input card) will bypass
the module’s insert point in and out of the audio signal chain. Note again
that the factory default is “insert bypassed”. In other words, when shipped
from the factory J1 is installed.
Phantom Power
Jumpers J3 and J4 (located on the MMADC input card next to CT2
connector) turn phantom power on and off for the module’s two micro-
phone input ports.
J3 activates phantom power for microphone A
J4 activates phantom power for microphone B
Talkback
Typically, one of the D-70 console’s input modules will be used for the
control room (CR) console operator’s microphone. The jumper J2 (located
in the center of the MMADC input card) allows that microphone to also
function as a talkback mic. It places the signal (pre-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-70 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 IND-70
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 twelve-conductor connector “TB to CR” control pin
(Pin 2) and Digital Ground (Pin 12). As long as this closure is maintained
(i.e., as long as talent holds down the studio TB button) the module’s (pre-
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.
Note the factory default
setting for phantom power
is OFF.
To Next Page
Loading...