
page 2 – 6
A-5000 / Nov 98
M O N O M I C I N P U T
To Turn the Module ON & OFF from a Remote Location
REMOTE ON — Activates the module’s channel ON switch. Provide
a momentary closure between Pin 16 (Remote On A) or Pin 22 (Remote
On B) and Digital Ground (Pins 4, 10, 17 or 23). This will latch the module
ON. (User-supplied momentary contact switch required.)
REMOTE OFF — Activates the module’s channel OFF switch.
Provide a momentary closure between Pin 3 (Remote Off A) or Pin 9
(Remote Off B) and Digital Ground (Pins 4, 10, 17 or 23). This will latch
the module OFF. (User-supplied momentary contact switch required.)
COUGH — Temporarily Mutes the module. Provide a closure be-
tween Pin 1 (Cough A) or Pin 7 (Cough B) and Digital Ground (Pins 4, 10,
17 or 23). This will turn the module OFF. Note this is a non-latching mode;
the module will turn ON again as soon as the closure stops. (User-supplied
momentary contact switch required.)
Talkback to Control Room
If an MM-5000 module is being used for a studio microphone, these
ports allow talkback from that studio to the console operator. Provide a
closure between Pin 14 (TB MIC A to CR ) or Pin 20 (TB MIC B to CR)
and Digital Ground (Pins 4, 10, 17 or 23). This will cause two things to
happen: (1) the module’s pre fader signal is sent to the console’s Cue bus,
where it may be heard by the console operator, and (2) the module’s Cough
function is activated, muting the module’s post fader signal and preventing
the TB signal from going out over other assigned busses (i.e., “live”). This
non-latching condition continues until the closure is released. (Requires
user-supplied momentary action TALKBACK switch at the studio micro-
phone location.)
On Tally
Lets the module’s channel ON switch control an on-air light or other
“microphone on” indicator at a remote location. This control function
provides a continuous closure between Pin 15 (On Tally A) or Pin 21 (On
Tally B) and Digital Ground (Pins 4, 10, 17 or 23) whenever the module’s
channel ON switch is activated.
This closure can be used to control an externally powered tally light
that requires a continuous closure to function. Or an external tally light
(i.e., LED) can be powered from the input module by connecting the
external LED to +5V Digital (Pins 5 or 11) and the A or B On Tally ports.
In either case, current should not exceed 30 milliamps.
Off Tally
Identical to “On Tally” (preceding) only this function keys off the
module’s channel OFF switch. Off Tally A is Pin 2; Off Tally B is Pin 8.
Typical DB-25
connector
See also “Talkback” sec-
tion earlier in this chapter,
(page 2-4).
We recommend a series
resistor between the LED
and +5V digital when you
are powering the external
tally from the console; a
value of 220
Ω
(1/4W 5%)
is suggested.