Lectrosonics MUTE Specifications
MUTE
TECHNICAL DATA
Features
• In Line “no pop” audio muting
• Compatible with all Lectrosonics
5 pin transmitters
• Rugged machined aluminum construction
The Kit Includes:
• MUTE switch
• SMKITTA5 5 pin connector kit
with spare sleeve
• REFUMCABLE cable
The Mute switch is an active device that is powered by
any 5 pin Lectrosonics transmitter including the new
Servo Input transmitters such as the LMa, UM400a, and
SMv series. It works with any 2 wire lavaliere microphone
wired according to Fig. 1 and will also work with most 3
wire lavalieres if they are wired according to Fig. 2.
It uses an optically coupled switch to mute the audio
signal without any clicks and pops, even when in a strong
RF field. It does not affect the RF output of the connected
transmitter. The toggle switch is weather resistant and the
included cable has weather resistant vinyl boots at each
end. A wiring kit is included that provides a 5 pin connector, strain reliefs, and an additional water resistant vinyl
boot to protect the lavaliere mic connector from moisture.
Transmitter
Jack
Microphone
Jack
Reversible Belt Clip
The Mute switch can be used for sporting events outdoors
because of its convenient weather resistant package. The
housing and belt-clip are machined aluminum, powder
coated and laser engraved for ruggedness and legibility.
The toggle switch is conveniently sized and can easily be
controlled under garments. The reversible belt clip allows
it to be adjusted to the user’s preference.
NOTE: The Mute switch works only with
Lectrosonics transmitters with TA5M input jacks.
Easy to reach
ON/OFF switch
Rio Rancho, NM, USA
www.lectrosonics.com
Microphone Wiring
The wiring in Fig. 1 is for 2-wire microphones such as
Regulated 3 Volt
4 Volts from
Transmitter
1mA
Countryman E6/B6 models. This is the same wiring used
N/C
4 k
33uF
N/C
N/C
40k
LED/LDR
40k
33uF
4k
N/C
MUTE Simplified Equivalent Circuit
+5 VDC
m
Servo Bias
500 Oh
1k
+
200 Ohm
3.3uF
Pin 4 to Pin 1 = 0 V
Pin 4 Open = 2 V
Pin 4 to Pin 2 = 4 V
30uF
+
To Limiter Control
100 Ohm
1
2
3
4
5
GND
BIAS
MIC
BIAS SELECT
LINE IN
100 Ohm
2.7K
+
30uF
10k
for a simplified direct connection to transmitters with
Servo Bias inputs, such as the UM400a and SMa, SMV
Series models.
Fig. 1
To set the bias voltage at 4V, install a jumper between
Pins 2 and 4.
Fig. 2
4 VOLT POSITIVE BIAS 2-WIRE ELECTRET
Lectrosonics Transmitter
Equivalent Circuit
The MUTE switch is connected
between the transmitter and
microphone using the REFUMCABLE
interconnecting cable.
Most common type of wiring for lavaliere mics
such as the Lectrosonics M-152.
Install jumper between Pins 2 and 4 to set 4V
bias. With no jumper, bias will be 2V.
3-wire microphones such as the Sanken COS-11 that
require an external resistor and should be wired as shown
in Fig. 3. This is the same wiring that is compatible with
Servo Bias and earlier 5-pin transmitter inputs.
Fig. 3
4 VOLT POSITIVE BIAS 3-WIRE ELECTRET
WITH EXTERNAL RESISTOR
Used for 3-wire lavaliere
microphones that require an
external resistor such as the
Sanken COS-11.
SHIELD
DRAIN (BIAS)
SOURCE (AUDIO)
581 Laser Road NE • Rio Rancho, NM 87124 USA • www.lectrosonics.com
(505) 892-4501 • (800) 821-1121 • fax (505) 892-6243 • sales@lectrosonics.com
13 January 2011
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