12
UCR301
Professional Audio Products Since 1971
INSTALLATION AND OPERATING INSTRUCTIONS
1.
Install a fresh battery or connect an external
power source to the UCR301.
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 UCR301’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 UCR301 audio output is designed
to drive any audio input device from microphone
level to +9 dBu line level.
Pilot
BAT
-40 -20 0 dB
1000
100
10
1
uV
Pilot Tone Indicator
Scan
B8
1000
100
10
1
uV
Vertical marker moves left to right
RF activity
Strength of RF activity is
indicated in microvolts with
markings on the front panel
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
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.)
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 display from
left to right. RF activity will be indicated by dark
areas in the display.
5.
RF signal strength is indicated by markings in
microvolts on the front panel to the left of the
OFF
ON
MENU
ANT 1
ANT 2
S
ELECT
Pilot
Div
RF
A
u
d Rx Tx
BAT
-40 -20 0 dB
1000
100
10
1
u
V
Press all three buttons at the same time
and the receiver will start scanning.
UCR201 Simplified Audio Output Circuit
50
50
2K
2K
XLR
OUT
AUDIO
AMP
Output
Level
Adjust
Squelch
2 (HI)
1 (COMMON)
3 (LO)
25V
Non-Polar
Caps
