Lectronics DCR822 User manual

DCR822
Compact Dual Channel Digital Receiver
DCR822-A1B1, DCR822-B1C1, DCR822-941
INSTRUCTION MANUAL
Rio Rancho, NM, USA
www.lectrosonics.com
Fill in for your records:
Serial Number:
Purchase Date:
Quick Start Summary
The following checklist includes the minimum required
settings to start using the receiver.
• Connect power to the receiver or install batteries
• Set the COMPAT (compatibility) mode for the trans-
mitters to be used
• Choose clean frequencies for your receiver chan-
nels using SmartTune or RF scan
• Set transmitters on the matching frequencies (see
transmitter manual) or use IR sync
• Verify transmitters are set to the same compatibility
mode as the receiver (see transmitter manual).
• Adjust transmitter input gain to match voice level
and mic position (see transmitter manual).
• Adjust receiver output level as needed for the
camera or mixer input level desired
• Turn on transmitter RF signals (see transmitter
manual)

DCR822
LECTROSONICS, INC.
2

Dual Channel Digital Receiver
Rio Rancho, NM 3
Table of Contents
General Technical Description ..............................................5
Compatibility with microSDHC memory cards ....................7
Front Panel Controls and Functions.....................................8
MENU/SELECT Button.........................................................8
Power/Back Button................................................................8
Up/Down Arrow Buttons........................................................8
IR (infared) Port.....................................................................8
microSDHC Memory Card Port.............................................8
Antenna Port (2)....................................................................8
Rear Panel Features ...............................................................8
XLR Audio Output Jacks .......................................................8
Power Input Jack...................................................................8
USB Port ...............................................................................8
Battery Compartment............................................................8
LCD Main Window...................................................................9
Navigating the Menus ...........................................................9
DCR822 LCD Menu Map....................................................10
Menu Item Descriptions ......................................................13
Recovering an Interrupted Recording .................................16
Antenna Mounting and Orientation ....................................17
Antenna/Block Reference Table ..........................................19
Installation and Operating Instructions..............................20
Finding Clear Frequencies..................................................20
Locking and Unlocking the Front Panel Controls ................20
Firmware Update ..................................................................21
Diagnostics ...........................................................................22
Multi-channel System Checkout..........................................22
Pilot Tone Bypass................................................................22
Replacement Parts and Accessories..................................23
Troubleshooting....................................................................24
Specifications and Features................................................26
Service and Repair ...............................................................27
Returning Units for Repair ..................................................27

DCR822
LECTROSONICS, INC.
4
General Technical Description
DCR822 Block Diagram

Dual Channel Digital Receiver
Rio Rancho, NM 5
The DCR822 digital 2-channel receiver is the true
successor to the venerable UCR411a - a dual-channel
package in the same size - and represents state-of-the-
art RF performance with Vector Diversity (an advanced
type of true diversity) and extremely robust front-end
architecture, bringing the highest level of RF and audio
performance to field and location production.
Extremely high Third Order Intercept (IP3) performance
of +15 dBm, 24-bit/48 kHz audio performance, and
AES-256 CTR mode encryption ensure that profession-
als in all audio disciplines have the tools needed to get
the job done, even in extremely tough environments.
On-board recording in .WAV (BWF) format via microS-
DHC card give this receiver unique possibilities for
different workflows.
Compatibility Modes
The DCR822 receiver was designed to operate with
Lectrosonics digital transmitters from the D2, DCH
and M2 series. The receiver is also backward compat-
ible with Digital Hybrid Wireless transmitters® includ-
ing those with NA Hybrid, NU Hybrid and EU Hybrid
modes.
Encryption
The DCR822 receiver features AES 256-bit, CTR mode
encryption, with 4 different key policies available.
Vector Diversity Reception
The DCR822 technology with Lectrosonics Vector Di-
versity (an advanced version of true diversity) minimizes
dropouts in situations where multi-path reflections can
cause serious problems. Traditional true diversity or
ratio diversity methods work well for FM and Hybrid sys-
tems but fall short of the ideal for today’s digital receiv-
ers. The DCR822’s Vector Diversity subsystem delivers
clean, artifact-free performance by combining the two
receiver signals via a unique phase-matching system
for maximum RF signal to noise.
RF Frequency Tracking Front-End and Mixer
In addition to the extremely high IP3 capability of the
receiver, to significantly reduce unwanted interfer-
ence and intermodulation problems, the DCR822 has
a frequency selective front-end section that tracks
and tunes to the desired signal frequency and rejects
unwanted interfering signals. The low noise high current
RF amplifier was designed with feedback regulation for
stability and precise gain in order to handle stronger RF
signals without output overload. This produces a robust
front-end that is as selective as fixed single frequency
designs and is suitable for use in close proximity to
other receivers and transmitters commonly used in field
production bag systems.
Smart Noise Reduction (SmartNR™)
The DCR822 has been meticulously designed using
the best available low noise components and tech-
niques. Nonetheless, the wide dynamic range of digital
and Hybrid transmission technology, combined with
flat response to 20 kHz, makes it possible to hear the
-120 dBV noise floor in the transmitter’s mic preamp,
or the (usually) greater noise from the lav microphone
itself. (To put this in perspective, the noise generated
by the recommended 4 k bias resistor of many electret
lavaliere mics is –119 dBV and the noise level of the
microphone’s electronics is much higher.) In order to re-
duce this noise and thus increase the effective dynamic
range of the system, the DCR822 is equipped with a
selectable Smart Noise Reduction algorithm, which re-
moves hiss without sacrificing high frequency response.
The Smart Noise Reduction algorithm works by at-
tenuating only those portions of the audio signal that fit
a statistical profile for randomness or “electronic hiss”.
Desired high frequency signals having some coherence
such as speech sibilance and tones are not affected.
The Smart Noise Reduction algorithm has three modes
- OFF/NORMAL/FULL - selectable from a user setup
screen. When switched OFF (the default setting for
digital compat modes) no noise reduction is performed
and complete transparency is preserved. All signals
presented to the transmitter’s front end, including any
faint microphone hiss, will be faithfully reproduced at the
receiver. When switched to NORMAL, (the factory de-
fault setting for Hybrid modes) enough noise reduction
is applied to remove most of the hiss from the mic pre-
amp and some of the hiss from lavaliere microphones.
The noise reduction benefit is dramatic in this position,
yet the degree of transparency maintained is excep-
tional. When switched to FULL, enough noise reduction
is applied to remove most of the hiss from nearly any
signal source of reasonable quality, assuming levels
are set properly at the transmitter. This additional noise
reduction comes at the cost of some transparency for
low-level room noise, yet the algorithm remains unde-
tectable under most circumstances.
Audio Output Level
A setup screen is provided for adjusting the audio out-
put level in 1 dB increments from -50 to +7 dBu using
the front panel SEL Up and Down buttons.
Test Tone
To assist in matching the audio levels of equipment con-
nected to the DCR822, a 1 kHz audio test tone, adjust-
able from -50 to +7 dBu in 1 dB increments, is available
at the outputs.
Batteries
The DCR822 operates on four disposable, 1.5VDC
AA Lithium batteries (recommended). Alkaline is not
advised.
Power Supply
The DCR822 may be operated from an external DC
power source (see Specifications & Features section for
allowed voltages.) The receiver has a built-in Poly-Fuse
to protect the unit. This fuse automatically 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.

DCR822
LECTROSONICS, INC.
6
OLED Display
The display has four primary windows. Pressing the
Front Panel MENU button steps through each of these
windows.
After power is turned off and back on again, the unit
defaults to the Main window and to the most recent fre-
quencies, audio level, transmitter battery condition, and
other user settings. These settings are retained even if
the batteries are removed. The display illumination can
be set to time out in 5 seconds, 30 seconds, or never.
Recorder Function
The DCR822 has a built in recording function for use
in situations where the absolute minimum equipment is
necessary, or as a backup to the main recorder system.
The recorder samples at 48kHz rate with a 24 bit
sample depth. The micro SDHC card also offers easy
firmware update capabilities without the need for a USB
cable or driver issues.
Clock Function
The DCR822 has a built-in calendar and clock that are
saved with power down. If the batteries are removed from
the unit, the DCR822 “remembers” where it left off and
resumes time and date counts from that point.
Power Off
When the Front Panel Power/Back button is pressed
for several seconds, the audio output is instantly muted
(squelched) and the message “POWERING OFF...” is
displayed briefly before the receiver switches off.

Dual Channel Digital Receiver
Rio Rancho, NM 7
Compatibility with
microSDHC memory cards
Please note that the DCR822 is designed for use with
microSDHC memory cards. There are several types of
SD card standards (as of this writing) based on capacity
(storage in GB).
SDSC: standard capacity, up to and including 2 GB –
DO NOT USE!
SDHC: high capacity, more than 2 GB and up to and
including 32 GB – USE THIS TYPE.
SDXC: extended capacity, more than 32 GB and up to
and including 2 TB – DO NOT USE!
SDUC: extended capacity, more than 2TB and up to
and including 128 TB – DO NOT USE!
The larger XC and UC cards use a different formatting
method and bus structure and are NOT compatible with
the recorder. These are typically used with later genera-
tion video systems and cameras for image applications
(video and high resolution, high speed photography).
ONLY microSDHC memory cards should be used. They
are available in capacities from 4GB to 32GB. Look for
the Speed Class 10 cards (as indicated by a C wrapped
around the number 10), or the UHS Speed Class I
cards (as indicated by the numeral 1 inside a U sym-
bol). Also note the microSDHC Logo.
If you are switching to a new brand or source of card,
we always suggest testing first before using the card on
a critical application.
The following markings will appear on compatible
memory cards. One or all of the markings will appear on
the card housing and the packaging.
UHS Speed Class I Stand-alone
Speed Class 10
UHS Speed Class 1
UHS Speed Class I
Accompanying
microSDHC logo
microSDHC Logo is a trademark of SD-3C, LLC

DCR822
LECTROSONICS, INC.
8
Front Panel Controls and Functions
MENU/SEL Button
The MENU button accesses the available menus and
selects the desired setting.
Power/Back Button
The Power ON/OFF button is used to turn the receiver
on and off. When browsing menus and making changes
to settings, press back to return to previous menu.
Up/Down Arrow Buttons
The Up/Down arrow buttons are used to scroll the vari-
ous options within each menu selection.
IR (infrared) Port
Settings can be transferred between transmitter and
receiver or receiver and receiver.
microSDHC Memory Card Port
Antenna Port (2)
XLR Audio Output Jacks
This is a standard XLR configuration with pin 2 “posi-
tive” with reference to hand-held and plug-on transmit-
ters. With lavaliere microphones and belt-pack trans-
mitters, however, phase will vary with different types of
microphones (2-wire vs. 3-wire for example). The audio
output is balanced but not floating, so an unbalanced
signal is available using pin 1 as ground and pin 2 as
signal, leaving pin 3 open.
Power Input Jack
The power input jack can accept 9-17 VDC - the center
pin is positive and sleeve is ground. The input is diode
protected to prevent damage if the power is applied
with reversed polarity, but the unit will not work until the
reversed polarity condition is fixed. The unit is sent with
a locking plug.
USB Port
The USB port can be used to connect the DCR822 to
the Lectrosonics Wireless Designer software (pending).
Battery Compartment
Four AA batteries are installed as marked on the side
panel of the receiver. The battery door is hinged and
remains attached to the housing.
Rear Panel Features
microSDHC memory
card port
IR (infrared) port
USB Port

Dual Channel Digital Receiver
Rio Rancho, NM 9
The Main Window displays information concerning the
RF levels at each antenna per channel, the condition
of the Pilot Tone (Hybrid) or Link (digital), and battery
conditions for both the receiver and the associated
transmitters. It is also the access portal to menu se-
lections for setting up the receiver and searching for
clear frequency channels.(See Menu Selections from
Main window and Frequency Scan Mode.). The PWR/
BACK button will cycle the display through four different
configurations. The configurations will contain various
combinations of transmitter names, RF signal strength
meters and audio meters, depending on user prefer-
ence.
• Battery icon changes to a plug icon when external
power is supplied
• SD Card Status: No card, card error, data card,
stopped (ready to record), recording
• Antenna Icons: Status of the vector diversity sys-
tem
• Receiver Battery Status Icons: Appear when the
receiver’s battery status is known and can take on
different appearances, depending on user settings.
• RF Signal Strength Strip Charts: Shows which
antenna is associated with the indicator.
• Channel Status Indicator: Pilot tone, link and en-
cryption system status.
• Keypad Shortcut: Can start or stop recording from
the Main Window: MENU+UP to begin recording
and MENU+DOWN to stop recording.
• Tuning Group Indicator: When tuning groups are
used, a tuning group indicator appears next to the
frequency. If it is blinking, it means that the currently
tuned frequency is not in the currently selected
group. If it is steady, it means that the currently
tuned frequency is in the selected group.
Navigating the Menus
From the Main Window, press MENU/SEL to enter the
menu, then navigate with the UP and DOWN arrows to
highlight the desired setup item. Press MENU/SEL to
enter the setup screen for that item. Refer to the menu
map on the following pages.
Replacing the Batteries
Lift the battery door to unlatch, push slightly forward
and open it.
Observe the battery contacts inside the compartment.
The larger contact is the neg. (-) terminal and the
smaller contact is the pos. (+) terminal.
Insert the contact end of the battery first, making sure
the large terminals are aligned with the large contacts
in the compartment.
Depress the batteries slightly to allow the door to close,
Main Window (LCD)
SD Card Slot
PWR/BACK
button
IR Port
MENU/SEL
button
UP/DOWN Arrow
buttons
then push slightly forward to latch shut. The battery con-
tacts are spring loaded to maintain constant pressure.
The door with snap into place when it is fully closed.
CAUTION: Lithium batteries will expand and
swell if allowed to go into a deep discharge.
Be sure to remove lithium batteries as soon
as possible after they are depleted. If lithium
batteries are allowed to fully discharge while
still inside the battery compartment, they will
be very difficult to remove.
Stuck lithium batteries can be avoided by
removing the label wrapping around the
battery before use. This will allow the battery
to swell but will still leave enough room in
the compartment for the battery to fall out
normally.
Battery Icon
RF Signal
Strip Charts
SD Card
Status
Antenna
Status
Channel
Status

DCR822
LECTROSONICS, INC.
10
DCR822 LCD Menu Map
The menus presented on the LCD are arranged in a straightforward manner, with those that are likely to be used
more often located at the top of the tree.

Dual Channel Digital Receiver
Rio Rancho, NM 11
DCR822 LCD Menu Map
Send All
Send All
Get All
Get Key
wipe key
press menu/sel
Sync 1 ---->
Sync 2 ---->
to get key.
get frequency
press menu/sel
Get Freq
Get Frequency
to send key.
Key Type
Key Type
Lock/Unlock
RX Power
Universal
Select option with arrow buttons
to select.
BACK
RX Power
Backlight
Edit Names
Backlight
Edit Names
Auto On
Auto On?
always on
30 seconds
5 seconds
Select option with arrow buttons
to select.
BACK
Enabled
Disabled
Select option with arrow buttons
to select.
BACK
RX Batt Type
TX Batt
Icon
TX Batt Display
bar graph
voltage
timer
Select option with arrow buttons
to select.
BACK
On
Off
Select option with arrow buttons
to select.
BACK
TX Batt
Timer
TX Batt Timer
Select option with arrow buttons
to toggle.
Hour: 3 Min: 1
Time: 0:04:25
Reset: menu+up
RX Batt Setup
Display Setup
Display Setup
LCD : normal
Select option with arrow buttons
to select.
BACK
RX Batt
Display
RX Batt Display
bar graph
voltage
timer
TX Batt
Alert
TX Batt Alert
Select option with arrow buttons
to toggle.
Status: disabled
Flash LCD: off
Select option with arrow buttons
to select.
BACK
RX Batt Type
Alk.
Lith.
Select option with arrow buttons
to select.
BACK
IR & Keys
Settings
Locale
Locale
About
About DCR822
Locale: NA
EU
Select option with arrow buttons
to select.
BACK
Band A1B1
V0.51/0.51
Default
Restore Defaults?
Date & Time
Date & Time
2000/01/28
00:32:16
TX Batt Type
TX Batt Type
Alk.
Lith.
Select option with arrow buttons
to select.
BACK
Select option with arrow buttons
to select.
Send Freq
Select option with arrow buttons
to select.
Send Frequency
send key
press menu/sel
Lock Settings?
Unlocked
Locked
1: TX1
2: TX2
Select option with arrow buttons
to toggle.
Ye s
No
Select option with arrow buttons
to toggle.
Select option with arrow buttons
to select.

DCR822
LECTROSONICS, INC.
12
Send All Send All
Get All Get Key
wipe key
press menu/sel
Sync 1 ---->
Sync 2 ---->
to get key.
get frequency
press menu/sel
Get Freq Get Frequency to send key.
Key Type
Key Type
Lock/Unlock
RX Power
Universal
Select option with arrow buttons
to select.
BACK
RX Power
Backlight
Edit Names
Backlight
Edit Names
Auto On Auto On?
always on
30 seconds
5 seconds
Select option with arrow buttons
to select.
BACK
Enabled
Disabled
Select option with arrow buttons
to select.
BACK
RX Batt Type
TX Batt
Icon
TX Batt Display
bar graph
voltage
timer
Select option with arrow buttons
to select.
BACK
On
Off
Select option with arrow buttons
to select.
BACK
TX Batt
Timer
TX Batt Timer Select option with arrow buttons
to toggle.
Hour: 3 Min: 1
Time: 0:04:25
Reset: menu+up
RX Batt Setup
Display Setup Display Setup
LCD : normal
Select option with arrow buttons
to select.
BACK
RX Batt
Display
RX Batt Display
bar graph
voltage
timer
TX Batt
Alert
TX Batt Alert Select option with arrow buttons
to toggle.
Status: disabled
Flash LCD: off
Select option with arrow buttons
to select.
BACK
RX Batt Type
Alk.
Lith.
Select option with arrow buttons
to select.
BACK
IR & Keys
Settings
Locale Locale
About About DCR822
Locale: NA
EU
Select option with arrow buttons
to select.
BACK
Band A1B1
V0.51/0.51
Default Restore Defaults?
Date & Time Date & Time
2000/01/28
00:32:16
TX Batt Type TX Batt Type
Alk.
Lith.
Select option with arrow buttons
to select.
BACK
Select option with arrow buttons
to select.
Send Freq Select option with arrow buttons
to select.
Send Frequency
send key
press menu/sel
Lock Settings?
Unlocked
Locked
1: TX1
2: TX2
Select option with arrow buttons
to toggle.
Ye s
No
Select option with arrow buttons
to toggle.
Select option with arrow buttons
to select.
DCR822 LCD Menu Map

Dual Channel Digital Receiver
Rio Rancho, NM 13
Menu Item Descriptions
IR Sync & Encryption Menu
Encryption Key Management
The DCR822 has four options for encryption keys:
• Standard: This is the most basic level of security. Each encryption key is unique to the DCR822 and there are
only 256 key instances available to be transferred to a transmitter. The receiver tracks the number of keys gener-
ated and the number of times each key is transferred. Once a Standard key has been transferred 256 times, you
will be alerted that a new key must be created.
• Shared: Once generated by the DCR822 and transferred to a transmitter, the encryption key is available to be
shared (synced) by the transmitter with other transmitters/receivers via the IR port.
• Universal: This is the most convenient encryption option available. All encryption-capable Lectrosonics trans-
mitters and receivers contain the Universal Key. The key does not have to be generated by the DCR822. Simply
set a Lectrosonics encryption-capable transmitter and the DCR822 to Universal, and the encryption is in place.
This allows for convenient encryption amongst multiple transmitters and receivers, but not as secure as creating a
unique key.
• Volatile: This is the most robust encryption option available. If the transmitter is powered off, it must be re-
sync’d. If the receiver is powered off, a new key must be generated and sent to the transmitter. In encryption
terms, this is the “one time use” key management policy.
Encryption Keys
The DCR822 generates high entropy encryption keys to sync with encryption-capable transmitters. The user must
select a key type and create a key in the DCR822, and then sync the key with the transmitter.
1. Begin by selecting a key type.
IR&Keys --> Key Type --> Standard, Shared, Universal, Volatile.
2. Next, select MAKE KEY to generate a new key. Select “Yes” to confirm Make Key.
IR&Keys --> Make Key
NOTE: When Universal Key type is selected, there is no prompt to create key.
3. A message will pop up on the screen stating that an Encryption Key has been created.
4. Sync new key with transmitter (see Send Key). The transmitted audio will then be encrypted with the new key.
Send Key
Send or retrieve (get) encryption keys. Select SEND KEY to send key with key type to any compatible transmitter.
Success will be indicated by IR SYNC SUCCESSFUL. Failure will be indicated by IR SYNC FAIL.
Sync Settings
Allows sending or retrieving setup data, including frequency, name and talkback settings, via the IR port. There are
two ways to initiate a sync.
Sync options: Choose to send frequency, send all settings, retrieve (get) frequency or retrieve (get) all settings from
a transmitter. Use the UP and DOWN arrows to select a function and MENU/SEL to initiate sync.
NOTE: You must position the transmitter’s IR port directly in front of the DCR822 IR port, as closely as possible, to
guarantee a successful sync.

DCR822
LECTROSONICS, INC.
14
RF Setup
Smart Tune:
Scans a selected transmitter trange and automatically selects a clear channel.
Frequency:
Allows manual selection of the operating frequency for each channel.
Scan:
Scans for an open frequency. Shows a graphic representaton of interference in the area, by frequency.
Clear Scan:
Clears scan results.
Group Edit:
Allows the user to set up tuning groups. The group selection appears in the upper right corner of the screen; choose
between U, V, X and W. MENU + UP adds a frequency; MENU + DOWN deletes a frequency.
Diversity:
Choices between: Vector or Frequency. Safeguards against loss of audio signal caused by RF interference.
Pilot Bypass:
Allows the user to bypass the pilot tone on each channel.
Audio Settings
Audio Level:
Allows user to set Audio Level per channel. Also allows user to enable 1kHz audio tone for level setting.
Compat Mode:
Allows user to set compatability mode per channel. Choose from: D2, JA Hybrid, NU Hybrid, EU Hybrid, NA Hybrid,
High Density Mode, DCHX on both channels, DCHX on channel 1 or 2, Duet on both channels, Duet on channel 1
or 2.
Output Type:
Allows user to choose output of each channel, analog or AES3
Routing:
Allows user to choose where to send RX1 and 2, to either output
channel or both.
Smart NR:
Allows user to enable Smart Noise Reduction on either channel or both
Talkback:
Allows user to enable Talkback function on either channel or both.
Polarity:
Allows user to set audio polarity of each channel as either positive or negative.

Dual Channel Digital Receiver
Rio Rancho, NM 15
SD Card Settings
Files:
Allows user to access file list saved as .WAV format. Selecting a specific .WAV file will display date, time, and length of
recording.
Takes:
Lists files on the SD card in the Scenes and Takes format. Files are listed in the form of SXX TXXX. Selecting a file will
display date, time, and length of recording.
Record:
Starts the DCR822 in recording mode, using the specified format in Settings>SD Card>File Naming. Record will
change to Stop once recording has begun.
Scene & Take:
Allows user to set scene and take file naming starting point. Subsequent starts and stops of recordings will increment
the take number.
Format Card:
Prompts user for confirmation of erasing files and preparing card for recording of audio files.
File Naming:
Allows users to set the naming format of file between:
- Sequence
- Clock Time
- Scene&Take
Load Group and Save Group:
The tuning groups feature allows groups of frequencies to be created, stored and used to constrain tuning. When a
tuning group is assigned, the frequency control is limited to the frequencies contained in thetuning group. The groups
are created using Lectrosonics DCR822 receiver or via Wireless Designer, then the groups are shared with the via IR
sync or microSDHC Memory Card transmission.
Use UP and DOWN arrows to toggle and MENU/SEL to save group
Recovering an Interrupted Recording
Recordings can be reliably recovered even if the microSDHC memory card is accidentally removed or the battery dies
while a recording is in progress. If a recording is interrupted, all of the audio is present on the card and can be easily
recovered by the DCR822. The DCR822 keeps track of the length of the most recent recording so it can supply a good
suggestion for the length to recover. If the length is ever unknown or the DCR822’s suggestion seems incorrect, it is
always possible to override the suggested length. If in doubt, specify the maximum length possible, in which case the
entire remainder of the card is recovered. All of the interrupted recording will be present, followed by extra contents
which might be random noise or audio from previously deleted recordings.
NOTE: A good battery or external power supply is required to begin the recovery process. If recovery is attempted with a
weak battery, a message will appear saying that a fresh battery will be required.

DCR822
LECTROSONICS, INC.
16
Once a fresh battery has been installed, power on the DCR822 and insert the card with the interrupted recording. The
DCR822 will detect the interrupted recording and display:
And then:
If “No” is chosen, nothing is done to the card and the DCR822 will not use the card. If “Yes” is chosen”, a prompt ap-
pears asking for the length of the recording to recover, specified as a number of hours and minutes. The default sug-
gestion will be the approximate length of the most recent recording. It is always safe to recover a longer recording than
was made. To specify the recovery time, use the MENU/SEL button to navigate and specify the hours and minutes
fields.
Once set as desired, use MENU/SEL to navigate to the “GO” soft button and press the DOWN arrow button to begin
the recovery process. Recovery is nearly instantaneous. When completed, the display will show:
INTERRUPTED
RECORDING
FOUND
Recover?
for safe use
see manual
No
Yes
Length to
recover?
08:10
hh mm
RECOVERY
SUCCESSFUL

Dual Channel Digital Receiver
Rio Rancho, NM 17
Antenna Mounting and
Orientation
A variety of accessories are available to enable vari-
ous antenna mounting options. For maximum operating
range, the antennas should be vertical and above the
camera and other equipment. The AMJ Rev. A antenna
is jointed so the whips can be oriented vertically regard-
less of the orientation of the receiver.
Maximum sensitivity is perpendicular to the whip, so
an ideal setup is shown in Fig. 1 and Fig. 2 where the
receiver is mounted in either a vertical or horizontal
position with the whips oriented vertically.
Fig. 3 depicts the receiver and antenna whips oriented
horizontally, which places the null of the receiver an-
tenna pattern pointing toward the transmitter. The result,
of course, is a weak signal entering the receiver.
Fig. 4 depicts the worst setup where the nulls in both
receiver and transmitter patterns face one another.
The transmitter antenna whips can point upward as
shown in these diagrams, but they will work just as well
with the whip pointing downward. Mount the transmitter
so that the whip is vertical and not in direct contact with
the wearer’s body or metallic objects in clothing and
costuming.
AMJ Rev. A Jointed Antenna
The AMJ-944 Rev. A antenna is a general purpose
design with a hinged joint that pivots in both directions
for positioning the whip at any desired angle. The pivot
allows the whips to be oriented vertically regardless of
the mounting position of the receiver.
The hinged joint pivots in both directions
Tx
STRONG
SIGNAL
WEAK
SIGNAL
Rx
Rx
Tx
WEAKEST
SIGNAL
Rx
Tx
Tx
STRONG
SIGNAL
Rx
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Antenna Scale
Center Frequency
Half-Power Points
SNA600A Printed Circuit Antenna
The SNA600a antenna is a versatile tool for
use with wireless microphone receivers or
IFB transmitters. The center frequency of
its 100 MHz bandwidth is tunablefrom 550
to 800 MHz; however, the roll-off above and
below this band is gradual. The SNA600a
measures lower than a 2:1 SWR (Stand-
ing Wave Ratio) from 465 MHz to 850 MHz
when the antenna arms are fully extended.

DCR822
LECTROSONICS, INC.
18
A “bendable” mounting strap is included that allows
vertical orientation on a variety of surfaces. Several
other adapters are also available for temporary or fixed
installations.
The antenna pattern provides about 3.7 dB of gain,
which makes it ideal for use with a passive splitter to
feed two receivers. This is one example of using two
splitters to feed two receivers for either ratio or antenna
switching diversity.
Use Lectrosonics P/N 21770 BNC (F) to SMA (M) adapter;
Pomona P/N 4290
PCA900
COAXIAL
CABLE
ZSC24
SPLITTER
Tx
WEAK
SIGNAL
STRONG
SIGNAL
Tx
Tx
WEAK
SIGNAL
ANTENNA ORIENTATION
The elements of both antennas
should be parallel to each other for
maximum signal strength. When they
are perpendicular or above one an-
other, the signal weakens significantly.

Dual Channel Digital Receiver
Rio Rancho, NM 19
Antenna/Block Reference Table
The two AMJ UHF whip antennas supplied with the receiver are factory cut to specific frequency blocks as shown in
the table below. A colored cap and label are used on blocks 20 through 23, and a black cap and label are used on the
other blocks to denote the frequency range of each model.
The chart is useful for fabricating an antenna from coaxial cable or other materials, or for identifying the frequency of
an antenna that is not marked. The lengths shown are specifically for the AMJ whip antenna with a SMA connector, as
determined by measurements with a network analyzer. The optimal length of the element in other designs will likely be
different than those shown in this table, but since the bandwidth is typically wider than the specified block, the exact
length is not critical for useful performance in whip, dipole and coaxial designs.
BLOCK FREQUENCY CAP ANTENNA
RANGE COLOR WHIP LENGTH
470 470.100 - 495.600 Black w/ Label 5.47” 141.2 mm
19 486.400 - 511.900 Black w/ Label 5.19” 133.9 mm
20 512.000 - 537.500 Black w/ Label 4.95” 126.2 mm
21 537.600 - 563.100 Brown 4.73” 119.6 mm
22 563.200 - 588.700 Red 4.47” 113.8 mm
23 588.800 - 614.300 Orange 4.23” 108.5 mm
944 941.525 - 959.825 Black w/Label 2.53” 64.3 mm
Note: Not all
Lectrosonics
products are
built on all of the
blocks covered
in this chart.
32
470
944
33
31
21
22
23 24
25 26 27
28 29
30
20
19
915
779
CUTTING TEMPLATE
Lay uncut antenna on this template and cut to length for the desired frequency block
Note: Check the scale of your printout. This line should be 6.00 inches long (152.4 mm).
Whip Length
Tr im the end of the color cap and slide the remaining sleeve over the whip - OR - Glue color cap onto the end
*Cut end of cap off
and slide over whip Frequency Blocks *Color cap
The hinged joint pivots in both directions

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.