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5.6 TALKBACK/INTERCOM MODULE
The optional Talkback/Intercom module (PR&E #99-371, #99-371-1 with TALK OVER MUTE)
enables Talkback communication between the Control Room and up to two external locations without
a Two-Studio Monitor module. This module, while lacking the full monitor control facilities of the
Two-Studio Monitor module, provides two-way Talkback audio and logic functions.
Section 7.15 has the Talkback/Intercom module schematic. Installation, audio connection, remote
control connection, internal options and its circuitry are described below.
INSTALLATION
The Talkback/Intercom module is installed in the mainframe position reserved for the Two-Studio
Monitor module (see Figure 2.3, page 10) and uses the STUDIO-1 and STUDIO-2 rear panel Molex
connectors for audio and logic connection.
AUDIO CONNECTION
When a Slate/Talkback/Test Oscillator module is installed in the console mainframe, the console
electret microphone will be the Talk To Studio Output source. When there is no Slate/Talkback/Test
Oscillator module present, a Microphone Input module assigned to the Control Room (see Section
2.9.1) is the Talk To Studio Output source. A customer-supplied remote control panel must be installed
to control the microphone Talkback logic (refer to Section 2.8.1, page 31).
A Studio-assigned microphone connected to a Microphone Input module (Section 2.9.1, page 40) will
be the Studio Talkback source. In the event that there is no Studio-assigned Microphone Input module,
a Talk From Studio Input is provided at the Studio connector for the connection of a high level
microphone source. However, when this input is used, the signal is assigned to the Control Room bus
only, and no Talkback communication between the two Studios is possible. Pin assignment for each
Studio is identical. Audio pin assignment for the STUDIO-1 connector is defined below.
STUDIO-1
MAIN
1
2
3
4
5
6
H/P+SELECT
1
2
3
4
5
6
7
8
9
10 11 12
FIXED+TALK
1
2
3
4
5
6
7
8
9
10 11 12
LOGIC
1
2
3
4
5
6
7
8
9
PACIFIC RESEARCH & ENGINEERING
AUDIO PIN ASSIGNMENT
Signal
- No Connection -
- No Connection -
- No Connection -
- No Connection -
- No Connection -
- No Connection -
Talk From Studio-1 Input
- No Connection -
- No Connection -
Talk From Studio-1 Output
NOTE: The Talk From Studio Input and Talk To Studio Output
are calibrated for a 0 dBu operating level.
94
BMX SERIES III CONSOLE
Pin Number
Low
Connector
Shield
MAIN
1
"
4
H/P+SELECT
1
"
4
"
7
"
10
FIXED+TALK
1
4
"
7
"
"
10
High
2
3
5
6
2
3
5
6
8
9
11
12
2
3
5
6
8
9
11
12
REVISION C
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