Lectrosonics UCR511 - Manual (Page 15)

UHF Wireless Digital Hybrid TM 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
50
2 (HI)
2K
1 (COMMON)
AUDIO
AMP
Caps
2K
3 (LO)
50
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
10 BAT
1
uV
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
10
1
uV
OFF ON
MENU
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 15