Lectrosonics UCR511 User Manual download pdf (Page 15)

UHF Wireless Digital Hybrid

Receiver

INSTALLATION AND OPERATING INSTRUCTIONS

1. Install a fresh battery or connect an external

power source to the UCR511 and attaach the

antennas.

2. Unless frequency settings have been

previously assigned, scan for an open

frequency and set both the receiver and

transmitter to that frequency. (See Finding

Clear Frequencies.)

3. Connect the audio cable to the Receiver Audio

Out XLR jack.

4. Set the Power ON/OFF switch to ON and

verify that the LCD panel activates.

5. Adjust the transmitter gain.

THIS IS

PERHAPS THE MOST IMPORTANT STEP IN

THE SET UP PROCEDURE.

Refer to your

transmitter manual’s Operating Instructions

section for details on how to adjust the

transmitter gain. In general, adjust the

transmitter gain so that the voice peaks will

cause the audio modulation indicators on the

receiver and transmitter to show full

modulation on the loudest peak audio levels.

Normal levels should cause the UCR511’s

audio level icon to fluctuate fully. This will

result in the best possible signal to noise ratio

for the system.

Note

A common mistake at this point is to use the transmitter audio gain

control to set the overall audio level of the entire audio system. The

transmitter gain control is not a volume control and must be set

independently of the overall system audio level. The transmitter

gain control is only used to set the proper modulation of the

transmitter. To explain it another way, it is used to match the

transmitter to the type of microphone and the sound levels that will

be present at that microphone. We encourage users to either

disconnect the rest of the sound system or turn the sound system

gain to minimum to prevent feedback or overload as the transmitter

gain is set. That way, feedback from the sound system or overload of

other equipment does not get in the way of setting the transmitter

gain properly. Only after the transmitter gain control is set should

the gain of the rest of the audio system be adjusted to achieve the

desired sound or signal levels.

6. Adjust the Audio Output according to the type

of input on your equipment. Use the LEVEL

menu and adjust the level with the SELECT

Up and Down buttons The input levels of

different cameras, VCRs, and PA equipment

vary, which may require that you adjust the

AUDIO OUT to an intermediate position. Try

different settings and listen to the results. If

the output of the receiver is too high, you may

hear distortion or a loss of the natural

dynamics of the audio signal. If the output is

too low, you may hear steady noise (hiss)

along with the audio. The UCR511 audio

output is designed to drive any audio input

Output

Level

25V

XLR

Adjust

Squelch

Non-Polar

OUT

2 (HI)

1 (COMMON)

AUDIO

AMP

Caps

3 (LO)

UCR411a Simplified Audio Output Circuit

device from microphone level to +10 dBu line

level.

Note

The test tone output is especially useful for an exact level match.

With the test tone running, adjust for the maximum desired peak

level using the metering on the connected device.

FINDING CLEAR FREQUENCIES

The folllowing procedure will help you identify RF signals

in the area and find clear channels for operating the

wireless system.

1. Ensure transmitter is turned off. Turn on the

receiver and wait a few seconds until the Main

Window appears on the LCD

Pilot Tone Indicator

Pilot

-40 -20 0 dB

1000

100

BAT

2. Ensure the receiver is not in PILOT TONE

BYPASS mode. (A “P” will be blinking in the

upper left corner of the Main Window.)

Pilot

Div

RF Aud Rx Tx

BAT

-40 -20 0 dB

1000

100

OFF

SEL

1 2

LECTRO

Press all three buttons at the same time and the

receiver will start scanning.

3. Simultaneously press the MENU and SELECT

Up and Down buttons to enter Scan Mode.

4. View the LCD while the receiver is scanning.

The vertical marker will move across the

Rio Rancho, NM – USA

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Lectrosonics UCR511 User Manual Page 15

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