Output LEVEL
Control
For cameras or mixers with manual level control
Attach a receiver output cable (see below) between the UCR100 and the
camera or mixer. Leave the camera or mixer audio level control in the same
position as set in Step 7. While speaking into the transmitter microphone at
the same level that will be used in the program, adjust the UCR100 output
LEVEL control for the correct input level for the camera or mixer.
If a correct input level to the camera or mixer cannot be achieved using the
UCR100 output LEVEL control, set the UCR100 output level as close as
possible to the correct level, and then adjust the input control slightly on the
camera or mixer. A peak in the audio signal should cause the -20 LED on the
UH400A or LM transmitters to blink red and occasionally light the “0” LED on the
UCR100 receiver. It should also show a “0 VU” indication on the camera or mixer.
For cameras with AGC (automatic gain control) only
It is always better to set the audio record level manually if possible; however, if manual control is not offered
on your camera, the wireless system can still be used, but the audio output of the UCR100 must be set by
listening rather than using the LEDs. This will reduce the “breathing” effect on the audio caused by the AGC
(automatic gain control).
Have the talker pause for 5 or 6 seconds after speaking, and listen for a buildup of background noise during
the pause. When the talker begins speaking again, the background noise will be buried by the talker’s voice
until the next pause in speech occurs. The noise buildup is caused by the AGC circuit in the camera trying to
adjust for a constant level. It is not the fault of the wireless system. Manually adjust the UCR100 output level
control to minimize the “breathing” effect (generally a lower setting).
Receiver Output Cables
581 Laser Road NE • Rio Rancho, NM 87124 USA • www.lectrosonics.com
(505) 892-4501 • (800) 821-1121 • fax (505) 892-6243 • [email protected]
MC100RCA
-
3.5mm male
TRS (stereo) plug
to two male RCA
plugs
MC100XLR
-
3.5mm
mono plug to male
XLR unbal; pin 2 (+)
with pins 1 and 3
jumpered; 100 ohm
resistor
MC100TRS
-
3.5mm TRS
(stereo) straight
plug to 3.5mm
TRS (stereo) right
angle plug
MC55
-
3.5mm mono
mini plug to XLR male;
15” long; converts
unbalanced line level
to balanced mic level;
45dB attenuator;
built-in caps bypass
phantom power
May 8, 2007
Always conduct a walk test before each use, since it is impossible to predict all potential sources of wireless
problems. Turn on the camera, the wireless and any other electronics that will be used. Have the talker (with
transmitter) walk through the areas while speaking where the wireless system will actually be used. Listen to
the audio quality while the talker makes this walk test. If the facility (worship center, conference room, hotel,
etc.) will also be using a wireless system while your system is operating, make sure that system is also turned
on and operating during your walk test.
Step 8:
Adjust UCR100 Output for Proper Record Level
Step 9:
Walk Test / Voice Test
