Lectrosonics UH400 - Manual (Page 7)

Frequency Agile Plug-on UHF Transmitter
OPERATING TIPS
The MIC LEVEL control knob should not be used to control the
volume of your sound system or recorder levels. This gain
adjustment matches the transmitter gain with the user’s voice
level and microphone positioning.
If the audio level is too high — both red LEDs will light frequently
or stay lit. This condition may reduce the dynamic range of the
audio signal.
If the audio level is too low — neither LED will light, or only the
–20 LED will light green. This condition may cause hiss and
noise in the audio.
Different voices will usually require different settings of the MIC
LEVEL control, so check this adjustment as each new person
uses the system. If several different people will be using the
transmitter and there is not time to make the adjustment for each
individual, adjust it for the loudest voice.
ADJUSTING THE TRANSMITTER FREQUENCY
If you are experiencing interference from another signal on your
frequency, you may want to change the operating frequency of
your system. The left switch changes the operating frequency by
1.6 MHz per step and the right switch changes it 100 kHz per
step. If you are experiencing interference, change the operating
frequency in 100 kHz steps to find a clear channel. If it is not
possible to find a clear channel using the 100 kHz switch, return it
to its original position and change the 1.6 MHz switch by one click
then try the 100 kHz switch again.
To gain access to these switches, slide the access door open
with a fingernail.
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
Frequency select switches, default position (8,8)
SELECTING THE OPERATING MODE
This unit is capable of working with Lectrosonics 100 series
analog, 200 series analog, 400 series digital hybrid or some
other analog wireless receivers (contact the factory for details).
The transmitter must be set to the operating mode of the match­
ing receiver, which is easily done using only the supplied
screwdriver and a battery.
NOTE: the UH400 is supplied from the factory as a
400 series transmitter
1. Make certain a good battery is in the battery compartment. If
the PWR LED lights up, the battery is correctly loaded.
2. Turn off the transmitter.
3. With a small screwdriver (included with your unit), set the
frequency change switches to CC. (for Change, Change).
4. Power up the unit briefly – just a couple of seconds (just watch
for the LED’s to light up) then immediately turn it off.
5. Change the switches to one of the following settings:
MODE SWITCH SETTINGS
100 Series 1,1
200 Series 2,2
Mode 3* 3,3 (*Contact factory for details.)
400 Series Digital Hybrid 4,4
6. Turn the transmitter on, wait just a couple of seconds and turn
off again.
7. Change the switches to 0,0.
8. Power up the unit. You have now changed the operation mode
for the UH400.
At power up the UH400 will confirm the current operating mode
with the number of blinks of the power LED. The setting will
remain the same until you reset it with the procedure listed
above. You do not have to change it with every use.
Rio Rancho, NM – USA 7