Lectronics DCR822, Инструкция по эксплуатации

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DCR822
LECTROSONICS, INC.
20
Locking and Unlocking the
DCR822 Front Panel Controls
The front panel controls can be “LOCKED” to prevent
accidental changes being made during operation and
handling.
To LOCK or UNLOCK the DCR822, choose MENU/
SEL, then SETTINGS. Use the arrow buttons to toggle
front panel controls. LOCK/UNLOCK, then choose
MENU/SEL to save the setting.
Note: The unit cannot be powered off if LOCKED.
Unlock first to power off.
Installation and Operating Instructions
1. Install a fresh battery or connect an external power
source to the DCR822 and attach the antennas.
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 DCR822’s audio level icon to fluc-
tuate fully. This will result in the best possible signal
to noise ratio for the system.
Important:
• Adjust the transmitter gain
before
you adjust the
receiver output level.
• When the transmitter if fully modulated, its limiter
will prevent any further increases in level.
• The receiver output circuitry is set to run at full
output, and the level control is simply an attenuator.
There is no difference in signal to noise ratio across
the entire adjustment range of the receiver output
level. The transmitter input gain is the critical adjust-
ment that will affect the signal to noise ratio.
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, mixer/record-
ers, and PA equipment vary, which may require
that you adjust the AUDIO OUT to an intermedi-
ate 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 dynam-
ics of the audio signal. If the output is too low, you
may hear steady noise (hiss) along with the audio.
The DCR822 audio output is designed to drive any
audio input device from microphone level to +7dBu
line level.
Note: The test tone output is especially useful for
an exact level match. With the test tone running,
adjust for the maximum desired peak level using
the metering on the connected device.
Scan Function
The Scan function is initiated by pressing Menu, then
RF Setup, then selecting Scan.
This screen indicates no RF activity.
The RF activity will be indicated by a vertical marker in
the Scan Graph, as shown circled.
Scanning can be paused by pressing Menu. The prob-
lem interference can be found by pressing the UP or
DOWN arrows to move the marker to the interference.
The scan can be exited by pressing the BACK button
The scan can be cleared by highlighting CLEAR SCAN
and pressing MENU SELECT.