Revision C • 1/04
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2-48
2 Installation
digital
STUDIO MODULE — EXTERNAL AUDIO & LOGIC, WITH SETUP DIP SWITCH 7 ON
The 16-pin EXTERNAL connector has the
external site’s talkback logic inputs and com-
mand outputs as well as the External site’s talk-
back audio in and out.
Both audio in and out are ba4 dBu
analog connections. A mic preamp is required
for the External site’s talkback microphone.
One of the Mic Preamp module’s ten mic
preamps could be used for this function.
A Talk to External Tally (that pulls low) is
available to command a lamp or LED indica-
tor that talk to external is being received.
Pins 4 and 5 change their functions depend-
ing upon whether SETUP DIP switch 7 is set
On or Off. When DIP switch 7 is on (as shown
on this page), pins 4 and 5 are the command
outputs Mute External and Dim External.
These are used to control the monitor speak-
ers at the external location.
When DIP switch 7 is off (the default set-
ting as shown on pages 2-48 and 2-49), pins 4
and 5 are the logic inputs Talk to Studio 1 and
Talk to Studio 1 Host.
Studio Module, EXTERNAL (DIP switch 7 On) — Simplified Logic Diagram
EXTERNAL Connector, with DIP Switch 7 set ON
Logic 5 VDC
Logic 5 VDC
Talk to External Tally
Dim External Command
Mute External Command
Talkback Audio Out (-)
Talkback Audio In Shield
Talkback Audio In (-)
Logic Ground
Activate Logic Inputs (+)
Talk to Control Room (-)
Talk to Studio 2 Host (-)
Talk to Studio 2 (-)
Talkback Audio Out (+)
Talkback Audio Out Shield
Talkback Audio In (+)
8
7
6
5
4
3
2
1
16
15
14
13
12
11
10
9
(wire insertion end view)
Talkback Audio Pins
Audio Out (pins 3,10,11)
Audio In (pins 1, 2, 9)
Notes:
Opto-Isolated inputs are current limited and work
with +5 to +40 VDC logic.
Opto-Isolated outputs can sink up to 60 volts or
350 mA max. current flow.
15
13
12
Inter
nal Logic
Talk to Studio 2 (-)
Talk to Studio 2 Host (-)
Activate Logic Inputs (+)
Logic Ground
16
Logic 5VDC
Logic 5VDC
6 Talk To External Tally
7
8
14
Talk to Control Room (-)
5 External Dim Command
4 External Mute Command
