Lectrosonics Inc SSMB1 Manuel D’Utilisation

10

Input Jack Configuration

Looking into the 3 pin Lemo mic connector from the 

outside of the transmitter, the pin centered in the two 

guide slots is pin 1 and is ground. At 7 o’clock is pin 2 

with a 2k resistor to ground. That 2k is a source load 

for the Sanken COS-11 to save putting a resistor in the 

connector. At 4 o’clock is pin 3, the servo audio input. 
Pin 1 - ground
Pin 2 - 2k source load to ground
Pin 3 - servo input
Voltages, phase, impedance, and line level for all mics 

signal sources are selected by menus. Pin 3 is the only 

connection for all mics except for the aforementioned 

Sanken COS-11. Countryman, DPA, Sanken COS-11 

and standard two wire mics can be configured in the 

menus. The Sanken CUB-01 is not supported.

Locking the Controls

The keypad can be locked to prevent inadvertent 

changes to be made to the transmitter. Press and hold 

both the UP and DOWN arrow buttons for several 

seconds until a countdown is completed on the LCD. 

The display will show 

unloc 3...2...1 and then Loc will 

appear. Remove the battery to unlock the controls.

Remote Control

Remote control signals (“dweedle tones”) may be used 

to control the transmitter. The tones are played back into 

the microphone to avoid the need to reach and handle 

the transmitter when making changes to the following 

adjustments and settings:
•

Input Gain

•

Sleep/Unsleep

•

Lock/Unlock

•

Tx power output

•

Frequency

A smart phone app is available in the App Store and in 

Google Play to implement this control. Search for the 

title 

LectroRM.

Adjusting the Input Gain

The two bicolor Modulation LEDs on the control panel 

provide a visual indication of the audio signal level 

entering the transmitter. The LEDs will glow either red 

or green to indicate modulation levels as shown in the 

following table.

Less than -20 dB 

 Off 

 Off

-20 dB to -10 dB  

 Green 

 Off

-10 dB to +0 dB 

 Green  

 Green

+0 dB to +10 dB 

 Red 

 Green

Greater than +10 dB 

 Red 

 Red

NOTE:  Full modulation is achieved at 0 dB, when 

the “-20” LED first turns red. The limiter can cleanly 

handle peaks up to 30 dB above this point.

It is best to go through the following procedure with the 

transmitter in the standby mode so that no audio will en-

ter the sound system or recorder during adjustment.
1)  With a charged battery in the transmitter, power the 

unit on in the standby mode (see previous section 

Powering On in Standby Mode).

2)  Press and hold the AUDIO button with Aud and a 

numeral on the display (e.g. 

Aud 22). 

3)  Prepare the signal source. Position a microphone 

the way it will be used in actual operation and have 

the user speak or sing at the loudest level that oc-

cur during use, or set the output level of the instru-

ment or audio device to the maximum level that will 

be used.

4)  Use the   and   arrow buttons to adjust the gain 

until the 

–10 dB glows green and the –20 dB LED 

starts to flicker red during the loudest peaks in the 

audio.

5)  Once the audio gain has been set, the signal can 

be sent through the sound system for overall level 

adjustments, monitor settings, etc. 

6)  If the audio output level of the receiver is too high or 

low, use only the controls on the receiver to make 

adjustments. Unless the microphone or its position 

changes, or a different instrument is being used, 

leave the transmitter gain adjustment set accord-

ing to these instructions. Use the audio output level 

control on the receiver to make adjustments for 

the desired level being delivered to the connected 

mixer, recorder, etc.