Lectrosonics UCR411 User Manual

Page 5

UHF Wireless Digital Hybrid

Receiver

RF-CONTROLLED DIGITAL NOISE FILTER

In addition to SmartNR, the UCR411 contains an RF
sensitive variable frequency filter, which reduces high
frequency response under extremely weak RF condi
tions. This filter does nothing until the RF signal strength
drops below 3 uV at which point it begins to roll off high
frequencies. Usable audio remains unaffected, but
noise-ups or “hits” occurring near the fringe of reception
sound much less harsh.

OUTPUT LEVEL ADJUST

One of several setup screens is provided for adjusting
the audio output level in 1dB steps from -50 to +5dBu
using the UP and DOWN buttons on the front panel.

TEST TONE

The UCR411 provides a 1kHz audio test tone at the XLR
connector for level adjustment of connected equipment.
The level is adjustable from -50 to +5 dBu in 1 dB steps
to allow a precise match.

BATTERIES

The UCR411 operates on two 9V alkaline or lithium
batteries. Access to the battery compartment is gained
by lifting one end and turning the rear panel door. NOTE:
Do not use an alkaline

and

a lithium in the same unit.

Standard or “heavy duty” batteries are not recom
mended.

POWER SUPPLY

The UCR411 may be operated from an external DC
power source (see Specifications and Features section
for allowed voltages.) The receiver has a built-in Poly-
Fuse to protect the unit. This fuse resets if the power
supply is disconnected for about 15 seconds. The power
section also has protection circuits that prevent damage
to the receiver if a positive ground power source is
applied.

LCD DISPLAY

The display has four main windows. Pressing the MENU
button rotates through each of these windows.

If the battery gets low on either transmitter or receiver, a
message will interrupt the display every few seconds and
flash a low battery warning.

After power is turned off and back on again, the unit
defaults to the main window and to the most recent
frequency, audio level, transmitter battery type and
locked/unlocked status settings. These settings are
retained even if the batteries are removed.

POWER UP SEQUENCE

The power-up sequence consists of four messages that
appear automatically over a period of a few seconds
after the power is switched on.

1) LOCKED or UNLOCKED status
2) The name LECTROSONICS
3) The model number and firmware revision numbers
4) The frequency block of operation

After these introductory messages are displayed, the
main window will appear.

The UCR411 is fully operational during the power up
sequence and will immediately respond to button pushes
made before the automatic sequence is completed. If a
valid transmitter signal is already present when the
receiver is turned on, the audio output will typically be
engaged somewhere in the middle of the power-up
sequence, following a brief delay to allow the audio
circuits to stabilize.

(See LOCKING AND UNLOCKING THE UCR411.)

POWER OFF

When the power switch is moved to the OFF position the
audio output is instantly muted (squelched) and the
message “POWERING OFF...” is displayed briefly before
switching off.

Rio Rancho, NM – USA