Lectrosonics UH400a User Manual download pdf (Page 10)

UH400A/UH400TM

TO AT TACH

Pull on mic to ensure it is locked.

Press firmly, listen for click.

Depress collar fully.

Click!

Operating Instructions

Attaching the Microphone

1. Set the correct phantom power voltage for the mic.

If the mic does not require phantom voltage, set the

Phantom Voltage Select switch to 5 VDC to reduce

the possibility of damage to the mic when the trans-

mitter is powered up.

2. Insert the UH400A into the XLR connector on the

bottom of the selected microphone. Listen for the

“click” that indicates the transmitter assembly has

locked on to the microphone. Gently pull on the mic

to ensure proper locking has occurred.

3. Set the LEVEL control to minimum (fully counter-

clockwise).

PHANTOM

VOLTAGE

SELECTOR

PHTM

NO PHTM

PWR OFF

LEVEL

15V

INPUT POWER SWITCH

GAIN CONTROL

4. Turn on the transmitter by setting the Power Switch

to PHTM if the mic requires phantom power, or

to NO PHTM if the mic does not require phantom

power. (Refer to the speciﬁcations for the mic you

are using to determine if phantom power is re-

quired.)

5. Position the mic as it will be used and speak into it

at the same voice level that will actually be used

during the program or production.

5. Start with the Input Gain Control control at maxi-

mum counterclockwise, then observe the Modula-

tion LEDs next to the input coupler as you turn the

gain control up. Turn the gain up until the -20 LED

glows red and the -10 dB glows green with occa-

sional red ﬂicker. This indicates full modulation.

TO REMOVE

Hold the

transmitter

case with the

microphone

pointed

upward.

Rotate the

collar in the

direction

shown.

The Input Gain Control on the transmitter should

not be used to control the volume of your sound

system or recording level. The control is used only

to achieve optimal modulation with the voice level

and mic position.

If the audio level is too high — both red LEDs will

glow solid red. This condition may reduce the

dynamic range of the audio signal with compression

being audible in severe cases.

If the audio level is too low — neither LED will glow,

or only the –20 LED will glow green. This condition

may cause hiss and noise in the audio.

6. Once the gain has been adjusted, leave the gain

control where it is and adjust the receiver output

level to match the recorder or sound system.

Different voices will usually require different settings of

the gain 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, It is generally best to

adjust it for the loudest voice.

Selecting the Compatibility Mode

This unit is capable of working with Lectrosonics 400

series digital hybrid receivers, 200 Series, 100 Series

and IFB analog receivers. It is also capable of working

with analog wireless receivers from other manufacturers

(contact the factory for details). Select the compatibility

mode for the matching receiver.

Note: The UH400A is supplied from the factory in

the Digital Hybrid (400 series mode).

1. If the Power LED lights up when the Power Switch

is set to PHTM or NO PHTM, the battery is good

and correctly installed.

2. Turn off the transmitter.

3. With a small screwdriver (included with your unit),

set the frequency change switches to CC. (for

Change, Change). To gain access to these switch-

es, slide the access door open with a ﬁngernail.

LECTROSONICS, INC.

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Lectrosonics UH400a User Manual Page 10

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