Installation And Operating Instructions; Finding Clear Frequencies - Lectronics UCR411A Instruction Manual

UCR411A

Installation and Operating Instructions

1. Install a fresh battery or connect an external power
source to the UCR411A and attach 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
UCR411A's audio level icon to fluctuate fully. This
will result in the best possible signal to noise ratio
for the system.
Important: 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 dif-
ferent settings and listen to the results. If the output
of the receiver is too high, you may hear distor-
tion 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 UCR411A
audio output is designed to drive any audio input
device from microphone level to +10dBu line level.
16
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 following procedure will help you identify RF sig-
nals in the area and find clear channels for operating
the wireless system.
1. Ensure transmitter is turned off. Turn on the receiv-
er and wait a few seconds until the Main Window
appears on the LCD
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 Tone Indicator
3. Simultaneously press the MENU and SELECT Up
and Down buttons to enter Scan Mode.
Press all three buttons at the same time and
the receiver will start scanning.
4. View the LCD while the receiver is scanning. The
vertical marker will move across the display from
left to right. RF activity will be indicated by dark
areas in the display.
Vertical marker moves left to right
RF activity
LECTROSONICS, INC.