Lectrosonics Inc SMWBC1 Manual De Usuario

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SMWB Series
LECTROSONICS, INC.
20
Compatible Wiring for Both Servo Bias Inputs and Earlier Transmitters:
Simple Wiring for Servo Bias Inputs ONLY:
Input Jack Wiring for Different Sources
In addition to the microphone and line level wiring illus-
trated below, Lectrosonics makes a number of cables 
and adapters for other situations such as connecting 
musical instruments (guitars, bass guitars, etc.) to the 
transmitter. Visit 
www.lectrosonics.com and click on 
Accessories, or download the master catalog.
A lot of information regarding microphone wiring is also 
available in the FAQ section of the web site at:
www.lectrosonics.com > SUPPORT > FAQs
Follow the instructions to search by model number or 
other search options.
4 VOLT POSITIVE BIAS 2-WIRE ELECTRET
Most common type of wiring for lavaliere mics. 
Fully compatible with 5-pin inputs on Lectrosonics 
transmitters such as the LM and UM Series.
Fig. 2
SHIELD 
TIP 
PIN 
SLEEVE 
LINE LEVEL 
RCA or 1/4” PLUG 
A UDI O 
T A5 F 
PLUG 
UNBALANCED LINE LEVEL SIGNALS
For signal levels up to 3V (+12 dBu) before limiting. Fully 
compatible with 5-pin inputs on other Lectrosonics transmitters 
such as the LM and UM Series.  A 20k ohm resistor can be 
inserted in series with Pin 5 for an additional 20 dB of 
attenuation to handle up to 30V (+32 dBu).
Fig. 8
1
2
3
4
5
PIN
SHIELD
AUDIO
T A5 F 
PLUG 
2.7 k
2 VOLT NEGATIVE BIAS 2-WIRE ELECTRET
Compatible wiring for microphones 
such as negative bias TRAM models.
NOTE:  The resistor value can range from 2k to 4k ohms.
Fig. 4
DRAIN (BIAS)
SOURCE (AUDIO)
SHIELD
4 VOLT POSITIVE BIAS 3-WIRE ELECTRET 
WITH EXTERNAL RESISTOR
This wiring is fully compatible with 5-pin inputs on Lectrosonics 
transmitters such as the LM and UM Series. This is the wiring 
for the Lectrosonics M152 lavaliere microphone.
Used for 3-wire lavaliere 
microphones that require an 
external resistor such as the 
Sanken COS-11.
Fig. 5
Fig. 3
DPA MICROPHONES (Danish Pro Audio miniature models)
This wiring is for DPA lavalier 
and headset microphones.
NOTE:  The resistor value can range from 3k to 4k ohms.
Fig. 10
2 VOLT NEGATIVE BIAS 2-WIRE ELECTRET
Simplified wiring for microphones such as negative bias TRAM.
NOTE:  This Servo Bias wiring is not compatible with earlier 
versions of Lectrosonics transmitters. Check with the factory 
to confirm which models can use this wiring.
Fig. 6
LO-Z MICROPHONE LEVEL SIGNALS
For low impedance dynamic mics or electret 
mics with internal battery or power supply.
XLR JACK
Insert 1k resistor in series with pin 3 if attenuation is needed
4 VOLT POSITIVE BIAS 3-WIRE ELECTRET
NOTE:  This Servo Bias wiring is not compatible with earlier 
versions of Lectrosonics transmitters. Check with the factory 
to confirm which models can use this wiring.
Fig. 11



PIN 
SHIELD 
A UDI O 
T A5 F 
PLUG 
3.3 k
1.5 k 
2 VOLT POSITIVE BIAS 2-WIRE ELECTRET 
Compatible wiring for microphones such as 
Countryman E6 headworn and B6 lavaliere.
Fig. 1
2 VOLT POSITIVE BIAS 2-WIRE ELECTRET
Simplified wiring for microphones 
such as Countryman B6 Lavalier 
and E6 Earset models and others.
NOTE:  This Servo Bias wiring is not compatible with earlier 
versions of Lectrosonics transmitters. Check with the factory 
to confirm which models can use this wiring.
Fig. 9
SHIELD 
TIP 
PIN 
SLEEVE 
LINE LEVEL 
RCA or 1/4” PLUG 
A UDI O 
T A5 F 
PLUG 
UNBALANCED LINE LEVEL SIGNALS
For signal levels up to 3V (+12 dBu) before limiting. Fully 
compatible with 5-pin inputs on other Lectrosonics transmitters 
such as the LM and UM Series.  A 20k ohm resistor can be 
inserted in series with Pin 5 for an additional 20 dB of 
attenuation to handle up to 30V (+32 dBu).
Fig. 8
See Line Level 
Signals on next page