Lectrosonics UT400 User Manual download pdf (Page 15)

Synthesized UHF Hand-Held Transmitter

Operating Notes

The Audio Level control should not be used to control

the volume of the overall sound system or recorder

levels. This gain adjustment is used to match the trans-

mitter gain with the user’s voice level and microphone

position.

If the audio level is too high — both Modulation

LEDs glow red sporadically. This condition will

reduce the dynamic range of the audio signal.

If the audio level is too low — neither Modulation

LED will glow, or only the -20 LED will glow green.

This condition may cause hiss and noise in the

audio.

Different voices will usually require different settings

of the Audio Level control, so check the Audio Level

settings as each new person uses the UT. If several dif-

ferent people will be using the same UT 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 operating frequency, you may need to change

the operating frequency of your system. This is done

through two Frequency Switches located under the Bat-

tery Compartment Cover.

The left switch is for coarse frequency adjustment, and

it increments the operating frequency in 1.6 MHz steps.

The right switch is for ﬁne frequency adjustment and it

increments the operating frequency in 100 kHz steps.

Modulation LEDs

Frequency Switches

-20 -10

Coarse Fine

Audio Level

All 400 Series receivers (and a number of earlier receiv-

ers) offer front panel LCDs that indicate the correct

transmitter switch settings, and provide built-in scan-

ning functions to help locate clear channels. Use the

scanning functions on these receivers to ﬁnd a clear

channel, then switch both the receiver and transmitter

to the Frequency Select Switch settings indicated in the

receiver’s display.

The R400A model receivers have an autotune function

(SmartTune™) that automatically locates clear operat-

ing channels.

If your receiver does not have an autotune or built in

scanning function, manually tune the receiver across its

band and ﬁnd a frequency where little or no RF activity

is displayed, with the transmitter turned off .

After ﬁnding a clear channel, set the transmitter to this

new frequency, then turn it on and make sure the RF

signal is strongly indicated at the receiver. Be sure

the switch settings on the receiver and transmitter are

set exactly the same. If, for example, the 100K switch

is one click above or below the desired frequency, the

receiver will indicate RF, but no audio (or severely dis-

torted audio) will be produced.

Rio Rancho, NM

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Lectrosonics UT400 User Manual Page 15

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