Lectrosonics UDR200c - Manual (Page 7)

7
Wireless Diversity Receiver
Rio Rancho, NM – USA
UDR200C Front Panel
TRANSMITTER AUDIO LEVEL
The modulation (audio level) of the incoming signal is indicated
by a fast responding LED strip. The strip is calibrated in 6dB
steps over an expanded scale (54dB) which provides an
extremely accurate visual “picture” of the signal dynamics,
even at a distance away from the receiver. The LED strip is
fast enough to track even brief transients, easily exceeding the
response time of conventional VU meters.
RF LEVEL INDICATORS
Two separate LED strips are provided to indicate the level of
the incoming RF signals. The LED strips are calibrated to
provide accurate indications from 1uV to 1mV. The LEDs are
highly visible from a distance, making antenna set up more
accurate. The dual LED strips are especially useful in “trouble-
shooting” difficult antenna installations.
OPTI-BLEND LEDs
The UDR200C receiver operates with a method of audio ratio
blending of two audio outputs. RF level in each receiver is
compared and the audio signals from the two receivers are
mixed together in a ratio that favors the quieter receiver. As
this blending action occurs, the brightness of the two OPTI-
BLEND LEDs will vary. The brighter the LED, the more audio
is being mixed in from that receiver.
FULL INFORMATION DISPLAY
The UDR200C receiver includes a 16-segment LED character
strip that provides information about the selected frequency,
group, required transmitter setting, TV channel, assigned user
name, locked/unlocked status and pilot tone status.
FRONT PANEL CONTROLS AND FUNCTIONS
PILOT INDICATOR
The audio output muting (squelch) function of the UDR200C is
controlled by a 33kHz tone modulation of the RF carrier. The
audio output is muted until this tone is present. The muted
condition is indicated by a blinking TX switch setting in the
LED display.
The pilot tone function can be defeated by pressing a switch
on the rear panel. The PILOT indicator, however, operates the
same regardless of whether or not the defeat switch is
pressed. The PILOT indicator strictly indicates the presence of
the pilot tone carrier from the transmitter.
DIVERSITY MODE
This switch is set to the DIVERSITY position for normal opera-
tion. For troubleshooting or when the receiver is used with a
single antenna, the switch can be set to select a single an-
tenna only.
MONITOR
This is an audio output to drive a wide variety of different types
of headphones. It is also usable as a second high quality
audio output to drive recorders or external audio devices.
POWER
Pressing the upper half of the rocker switch applies power to
the receiver. At turn on, there are various relays and delays
built into the receiver to allow various stages to stabilize before
the audio output is activated. This will prevent an audio
“thump” when powering up the receiver and/or the transmitter.
The UDR200C has a universal switching power supply which
will operate on AC voltages from 95 to 240Volts, 50 or 60Hz.
A
500 250 100 50 25 10 5 1uV 2 1mV OPTI
BLEND
500 250 100 50 25 10 5 1uV 2 1mV
OPTI
BLEND
B
LIM 0 -6 -12 -18 -24 -30 -36 -42 -48
TX AUDIO LEVEL dB RF LEVEL
RF LEVEL
FREQ
SELECT
POWER
MONITOR MODE
A B
DIVERSITY
MENU
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