Lectrosonics Inc UH400E Manuel D’Utilisation

11

4.  Set the Power Switch to NO PHTM briefly – just a 

couple of seconds for the front panel LED’s to light 

up, then turn the unit off.

5. Change the Frequency Select switches to one of the 

following settings:

MODE SWITCH SETTINGS 

100 Series 

1,1 

200 Series 

2,2 

Mode 3* 

3,3 

400 Series (Digital Hybrid)  4,4 

IFB Mode 

5,5 

Mode 6* 

6,6

6.  Turn the transmitter on, four about 1 sec. then back 

off.

7.  Change the switches to 0,0.
8.  Turn the transmitter on and verify the new compatibility 

mode.  The front panel -20 and -10 LEDs will blink:

   • Once for 100 Series mode 

 • Two times for 200 Series mode 

 • Three times for mode 3 (contact factory) 

  •  Four times for 400 Series mode                      

 

•

  Five times for IFB mode 

 • Six times for mode 6 (contact factory)

The Compatibility Mode will remain as set until changed 

with the above procedure.

Adjusting the Transmitter Frequency

The receiver is normally used to find and verify a 

clear frequency for operation. Some receiver models 

have built-in scanning capability to quickly find a clear 

frequency. In other cases you may need to use pre-

coordinated frequencies from the Lectrosonics tables 

or someone else. Set the left and right switches on the 

transmitter to match the receiver. The alpha-numeric 

settings are displayed as a pair, ie. A-6, 8-5, 4-B, etc., 

with the left character for the left hand switch and the 

right character for the right hand switch.

Battery Replacement

The transmitter is powered by a standard 9 volt battery.  

Alkaline, Li Polymer rechargeable and lithium types can 

be used. Standard zinc-carbon batteries marked “heavy 

duty” or “long-lasting” are not adequate.  They will 

provide only about five minutes of operation.  Similarly, 

ni-cad rechargeable batteries only give one hour of 

operation, and will also run down quite abruptly.  Alka-

line batteries provide about 4.5 hours of operation while 

lithium batteries will run the unit for about 12 hours.
To open the battery compartment, press upward on the 

cover door in the direction of the arrow as shown in the 

drawing.  Only slight, sliding pressure is needed to open 

and close the battery door.
Swing the door open and take note of the location of 

the positive (+) and negative (-) terminals.  Insert the 

new battery correctly and close the cover by reversing 

the opening procedure.  Note that the battery door will 

NOT close if the battery is inserted incorrectly, since the 

terminals will hit a protective polarity barrier.  Don’t force 

the battery door closed.  If it is difficult to close, the bat-

tery is in backwards.
The battery life will be affected by the amount of phan-

tom power supplied to any microphones that require 

it. A high drain 48 volt microphone can shorten battery 

life by 40% or more. A light drain 18 volt microphone 

will make little or no difference in battery life. The only 

way to be sure is to test the transmitter and microphone 

combination with a brand new battery.

CAUTION: Lithium batteries will expand and 

0 1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

0 1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

Battery Compartment Action