Lectrosonics UCR511 - Manual (Page 7)

UHF Wireless Digital Hybrid TM Receiver
algorithm remains undetectable under most
circumstances.
RF-CONTROLLED DIGITAL NOISE FILTER
In addition to SmartNR TM , the UCR511 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 1 dB steps from -50 to +5 dBu
using the SEL Up and Down buttons on the front panel.
TEST TONE
To assist in matching the audio levels of equipment
connected to the UCR511, a 1 kHz audio test tone,
adjustable from -50 to +5 dBu in 1 dB increments, is
available at the XLR connector. This tone is available
through the TONE display window.
BATTERIES
The UCR511 operates on two 9 V 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 recommended.
POWER SUPPLY
The UCR511 may be operated from an external (Nega­
tive Ground) 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 primary windows: Main, Setup,
Battery Level, Frequency. 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 other
user settings. These settings are retained even if the
batteries are removed. After five minutes of no key
activity, the LCD backlight goes off and the display
reverts back to the Main Window.
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) UCR511
BLK xx (xx is the frequency block number)
2) VERSION
R.R/A.A (R.R is the RF board firmware
version, A.A is the audio board firmware
version)
3) COMPAT mode (mode is one of the following:
500 - native 500 Series mode
100 - Lectrosonics 100 Series compatibility
300 - Lectrosonics 300 Series compatibility
MODE 3 - compatible with certain non­
Lectrosonics transmitters)
IFB - compatible with all Lectrosonics IFB
transmitters.
4) TUNING mode (mode is one of the following:
NORMAL - tune in single channel increments
GRP x - tune in precoordinated intermod-free
frequencies (x is A, B, C or D))
The Main Window will appears after these introductory
messages are displayed.
The UCR511 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.
POWER OFF
When the Front Panel Power ON/OFF 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 7