Lectrosonics LMa User Manual download pdf (Page 12)

LMa

LECTROSONICS, INC.

BALANCED AND FLOATING LINE LEVEL SIGNALS

*NOTE: If the output is balanced but center

tapped to ground, such as on all Lectrosonics

receivers, do not connect Pin 3 of the XLR jack

to Pin 4 of the TA 5F connector.

TA5F

PLUG

XLR JACK

Fig. 7

Compatible Wiring for Both Servo Bias Inputs and Earlier Transmitters:

Simple Wiring - Can ONLY be used with

Servo Bias Inputs:

Wiring Hookups for Different Sources

In addition to the microphone and line level wiring hook-

ups illustrated below, Lectrosonics makes a number of

cables and adapters for other situations such as con-

necting 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:

http://www.lectrosonics.com/faq.htm

Follow the instructions to search by model number or

other search options.

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

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

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

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. 11

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.

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

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

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Lectrosonics LMa User Manual Page 12

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