Wheatstone D-8000, Technical Manual

Page: 26 / 169

page 2 – 6
D-8000 / Jan 2003
D I G I T A L / A N A L O G I N P U T
Pin 20 – TB To CR B
Pin 21 – On Tally B
Pin 22 – Remote On B
Pin 23 – Remote Common B
Pin 24 – Start B
Pin 25 – +5V Digital
To Turn the Module ON & OFF from a Remote Location
In the case of stereo line input modules, “remote location” can also
refer to a remote source machine that is feeding its audio to the module in
question. A 5VDC signal, as indicated below, will activate the module’s
channel ON and OFF switches.
REMOTE ON — Activates the module’s channel ON switch. Provide
a momentary 5VDC signal between Pins 16 (Remote On A) and 17
(Remote Common A) or Pins 22 (Remote On B) and 23 (Remote Common
B). This will latch the module ON.
REMOTE OFF — Activates the module’s channel OFF switch.
Provide a momentary 5VDC signal between Pins 3 (Remote Off A) and 17
(Remote Common A) or Pins 9 (Remote Off B) and 23 (Remote Common
B). This will latch the module OFF.
COUGH — Temporarily Mutes the module. Provide a momentary
5VDC signal between Pins 1 (Cough A) and Pin 17 (Remote Common A)
or Pins 7 (Cough B) and 23 (Remote Common B). This will turn the
module OFF. Note this is a non-latching mode; the module will turn ON
again as soon as the signal stops. (User-supplied momentary contact
switch required.)
Note that these are opto-isolated inputs and require a signal of the
correct polarity. The Remote Common A and Remote Common B Pins
will always be positive relative to the Pins for the other signals (Remote
On A and B, Remote Off A and B, and Cough A and B).
Talkback to Control Room
If a module is being used for a studio microphone, these ports allow
talkback from that studio to the console operator in the control room.
Provide a momentary 5V signal between Pins 14 (TB to CR A) and 17
(Remote Common A) or Pins 20 (TB to CR B) and 23 (Remote Common
B), with positive end of the signal going to the Remote Common A or B
pin. 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 signal is removed. (Requires user-supplied momentary
action talkback switch at the control room microphone location.)
Typical DB-25
connector