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220 / March 2000
I N P U T M O D U L E
Input Module (IND-220)
Module Overview
The IND-220 is a dual input module with double wide faceplate,
and having one main PCB card. Depending on the type of input
signals the module will handle, it will also have any combination of
two piggyback cards for mono microphone (-50dBu nominal), stereo
line analog, or stereo line digital inputs. Each section of the dual
module accepts two sources, A and B, switched at the top of the
module.
IND-220 modules are for microphone input signals (-50dBu
nominal) and for stereo line input signals. Each module accepts two
mono/stereo sources: A and B, switched at the top of the module.
They are available in three different versions: mono microphone
inputs, analog stereo line inputs and digital stereo line inputs.
The mono version uses an MMADC-220 piggyback card at the
input stage of the module. Phantom power is available at both input
ports; it may be selectively activated by an internal jumper (the
factory default is OFF). Recessed front panel multi-turn trimpots
(range 38dB) adjust the level of the A and B inputs independently.
Example: with a microphone input of –60dBm @150
Ω
at the port,
gain trim can set levels from -22dBu to +16dBu (note maximum preamp
gain is +76dB).
An insert point (+4dBu balanced) is provided: it is post-trim and
may be internally bypassed, which is the factory default setting.
The ADC (analog-to-digital converter) version uses an SLADC-
220 piggyback card at the input stage of the module, and accepts
+4dBu balanced analog input signals. Recessed front panel multi-
turn trimpots adjust the left and right levels..
The SRC (sample rate converter) version uses an SRC-220
piggyback card at the input stage of the module, and accepts digital
(AES is factory default) input signals.
Output switches assign the selected source signal to any combi-
nation of the console’s four stereo outputs: PGM (program), AUD
(audition), AUX (auxiliary) and/or UTL (utility).
Level is set by a long-throw fader.
The channel ON and OFF switches are at the bottom of the
module. In addition to being controlled remotely, these can also be
programmed (via VDIP program) to perform a variety of console
control functions, including activating control room and studio
mutes, talkbacks, external tallies, and timer restart.
All audio and control input and output signals are made via a
multi-pin DB-25 connector mounted on the top of each individual
module and located underneath the hinged meterbridge.
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IND
IND
CUE
CUE
P
G
M
A
U
D
U
T
L
A
U
X
A
S
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N
A
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START
A
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B
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F
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O
F
F
MIC IN
LINE IN
DIG IN
MIC IN
LINE IN
DIG IN
I/O
I/O
MIC / LINE TRIM
M1 / LT
M2 / RT
MIC / LINE TRIM
M1 / LT
M2 / RT
W# 026000A
W# 026000A
MODULE TYPE
MODULE TYPE