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Line Level Signals
Note: This section does not apply to the IM
transmitter when used as part of the IS400
Instrument System.
The normal hookup for line level signals provides 40 dB
of attenuation allowing signal levels up to 3 V to be
applied without limiting. The normal hookup configura-
tion can be modified for situations that require higher
levels of headroom, or lower levels of attenuation. (See
illustration below.)
Normal hookup configuration connects the Signal Hot
(Audio) to pin 5, Signal Gnd (Shield) to pin 1, and both
pins 3 and 4 jumped to pin 1.
If even more headroom is required, insert a 100 k
resistor in series with pin 5 (Audio). Put this resistor
inside the TA5F connector to minimize noise pickup.
For situations where lower than normal line levels (less
than 1 V) are expected, use the Lower Line Level Hook
Up: Signal Hot (Audio) to pin 5, Signal Gnd (Shield) to
pin 1, and pin 4 jumpered to pin 1. This configuration
provides 20 dB attenuati on to the input signal.
Wiring Hookups for Different Sources
3 WIRE ELECTRET MIC
POSITIVE BIAS
2 WIRE ELECTRET MIC
POSITIVE BIAS
3 WIRE ELECTRET MIC
NEGATIVE BIAS
Wiring Diagram for MI33A Instrument Cable
The MI33ARA and MI33AST instrument cable assem-
blies allow an optimum match between musical instru-
ment pickups and Lectrosonics transmitters with 5-pin
input connectors.
The active preamp and low noise wire cable provide a
"same as wire" experience in a wireless environment.
The 30 inch long cable offers enough cable to comfort-
ably link the instrument to the wireless transmitter
without being excessive.
Rio Rancho, NM
PIN
SHIELD
1
2
4
1
BIAS
5
3
2
3
AUDIO
4
TA5F
5
PLUG
PIN
SHIELD
1
2
4
1
5
AUDIO
3
2
3
4
TA5F
5
PLUG
PIN
SHIELD
1
2
4
1
BIAS
5
3
2
3
AUDIO
4
TA5F
5
PLUG
Frequency-Agile UHF Belt-Pack Transmitter
SHIELD (GND)
Normal Hookup
AUDIO
SHIELD (GND)
More Headroom
100k
AUDIO
SHIELD (GND)
Lower Line Level
Hookup
AUDIO
2 WIRE ELECTRET MIC
NEGATIVE BIAS
SLEEVE
TIP
LINE LEVEL
RCA or 1/4 " PLUG
PIN
1
2
1
3
2
3
DYNAMIC
Dynamic LO Z mic or electret with
manufacturer's power supply.
MIC LEVEL
SLEEVE
SHIELD
AUDIO
TIP
1/4 " PLUG
Note: This cable is prewired and cannot be field
modified. The cable is available in two
configurations, MI33ARA (right angle) and
MI33AST (straight).
PIN
1
2
4
1
5
3
2
3
4
TA5F
5
PLUG
PIN
1
2
4
1
5
3
2
3
4
TA5F
5
PLUG
PIN
1
2
4
1
5
3
2
3
4
TA5F
5
PLUG
PIN
SHIELD
1
2
4
5
AUDIO
3
2
3
4
TA5F
5
PLUG
PIN
SHIELD
1
2
4
AUDIO
5
3
2
3
4
TA5F
5
PLUG
PIN
SHIELD
1
2
4
5
3
2
3
4
TA5F
5
PLUG
PIN
SHIELD
1
Preamp
PWR
2
4
5
AUDIO
3
3
4
TA5F
3 k
5
PLUG
1
1
1
1
2
11
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