Lectrosonics DCHR User manual
DCHR
Digital Camera Hop Receiver
INSTRUCTION MANUAL
Quick Start Steps
1) Install receiver batteries and turn power on (pg. 5).
2) Set compatibility mode to match the transmitter (pg.
10).
3) Set or sync frequency to match transmitter (see
page 10).
5) Set encryption key type and sync with transmitter
(see page 11).
6) Choose analog or digital (AES3) output (see page
10).
7) Verify RF and audio signals are present.
Fill in for your records:
Serial Number:
Purchase Date:
WARNING: Moisture, including talent’s sweat,
will damage the receiver. Wrap the DCHR in
a plastic baggie or other protection to avoid
damage.
Rio Rancho, NM, USA
www.lectrosonics.com
DCHR
Table of Contents
Quick Start Steps ................................................................ 1
DCHR Digital 2-Channel Receiver ...................................... 3
Smart Tuning (SmartTune
Encryption ........................................................................... 3
RF Front-End with Tracking Filter ........................................ 3
Panels and Features ............................................................. 4
Battery Status LED ............................................................. 5
RF Link LED ........................................................................ 5
IR (infrared) Port ................................................................. 5
USB Port ............................................................................. 5
Battery Compartment.......................................................... 5
Audio Jack and Pin Configuration ....................................... 5
Keypad and LCD Interface .................................................. 5
Installing Batteries ............................................................... 6
System Setup Procedure ..................................................... 6
DCHR LCD Menu Map .......................................................... 8
Menu Item Descriptions ..................................................... 10
RF Setup Menu ................................................................... 10
Audio Setup Menu .............................................................. 10
Sync/Encryption Menu ...................................................... 10
Tools/Settings ..................................................................... 11
Supplied Accessories ........................................................ 13
Optional Accessories ......................................................... 13
Specifications ..................................................................... 14
Service and Repair ............................................................. 14
Returning Units for Repair ................................................ 14
™
) ................................................ 3
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, my cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
2
LECTROSONICS, INC.
Digital Camera Hop Receiver
DCHR Digital Stereo/Mono Receiver
The DCHR Digital Receiver is engineered to work
alongside the DCHT transmitter to form the Digital
Camera Hop system. The receiver is also compatible
with the M2T unencrypted and M2T-X encrypted digital
stereo transmitters, and the D2 Series mono digital
transmitters, including the DBu, DHu, and DPR. Designed to be camera mountable and battery powered,
the receiver is ideal for location sound and televised
sports, along with many other applications. The DCHR
employs advanced antenna diversity switching during
digital packet headers for seamless audio. The receiver
tunes across a wide UHF frequency range.
The DCHR has a single audio output jack that can be
configured as 2 independent balanced line level outputs or as a single 2 channel AES3 digital output.
The headphone monitor output is fed from a highquality stereo amplifier with power available to drive
even inefficient headphones or earphones to sufficient
levels for noisy environments. An intuitive interface and
high resolution LCD on the unit provide users with a
quick read on the status of the system.
The DCHR also employs 2-way IR sync, so settings
from the receiver can be sent to a transmitter. This
way, frequency planning and coordination can be done
quickly and confidently with on-site RF information.
Smart Tuning (SmartTune™)
A major problem facing wireless users is finding clear
operating frequencies, especially in RF saturated
environments. SmartTune™ overcomes this problem
by automatically scanning all the frequencies available
in the unit, and tuning to the frequency with the lowest
RF interference, significantly reducing setup time.
RF Front-End with Tracking Filter
A wide tuning range is helpful in finding clear frequencies for operation, however, it also allows a greater
range of interfering signals to enter the receiver.
The UHF frequency band, where almost all wireless
microphone systems operate, is heavily populated by
high power TV transmissions. The TV signals are immensely more powerful than a wireless microphone or
portable transmitter signal and will enter the receiver
even when they are on significantly different frequencies than the wireless system. This powerful energy
appears as noise to the receiver, and has the same
effect as the noise that occurs with extreme operating
range of the wireless system (noise bursts and dropouts). To alleviate this interference, high-quality frontend filters are needed in the receiver to suppress RF
energy below and above the operating frequency.
The DCHR receiver employs a selective frequency,
tracking filter in the front-end section (the first circuit
stage following the antenna). As the operating frequency is changed, the filters re-tune into six different
“zones” depending on the selected carrier frequency.
BLOCK
470 MHz
BLOCK
BLOCK
In the front-end circuitry, a tuned filter is followed by
an amplifier and then another filter to provide the selectivity needed to suppress interference, yet provide a
wide tuning range and retain the sensitivity needed for
extended operating range.
BLOCK
BLOCK
BLOCK
614 MHz
Encryption
The DCHR provides AES 256-bit, CTR mode encryption. When transmitting audio, there are situations
where privacy is essential, such as during professional
sporting events. High entropy encryption keys are first
created by the DCHR. The key is then synced with an
encryption capable transmitter/receiver via the IR port.
The audio will be encrypted and can only be decoded
and heard if both the transmitter and the DCHR have
the matching key. Four key management policies are
available.
Rio Rancho, NM
3
DCHR
Panels and Features
RF Link
LED
Battery Status
LED
Audio Output
Jack
IR (Infrared)
Port
Belt Clip
Mounting
Sockets
USB
Port
Headphone Output
Jack
Battery Compartment
When on Main Screen, UP and DOWN buttons will
adjust headphone volume.
4
Door
LECTROSONICS, INC.
Digital Camera Hop Receiver
Battery Status LED
When the battery status LED on the keypad glows
green the batteries are good. The color changes to red
at a midpoint during the runtime. When the LED begins
to blink red, only a few minutes remain.
The exact point at which the LED turns red will vary
with battery brand and condition, temperature and
power consumption. The LED is intended to simply
catch your attention, not to be an exact indicator of
remaining time. The proper battery type setting in the
menu will increase accuracy.
A weak battery will sometimes cause the LED to glow
green immediately after the transmitter is turned on,
but it will soon discharge to the point where the LED
will turn red or the unit will turn off completely.
RF Link LED
When a valid RF signal from a transmitter is received,
this LED will light up blue.
IR (infrared) Port
Settings, including frequency, name, compatibility
mode, etc. can be transferred between receiver and
transmitter.
Outputs
Headphone Monitor
A recessed, high duty cycle 3.5 mm stereo jack is provided for standard headphones and earphones.
Audio Jack (TA5M mini XLR):
• AES3
• Analog Line Out
The 5-pin input jack accommodates two discrete
channels at microphone or line levels. The input
connections are configured as follows:
USB Port
Firmware updates via Wireless Designer software are
made easy with the USB port on the side panel.
Battery Compartment
Two AA batteries are installed as marked on the rear
panel of the receiver. The battery door is hinged and
remains attached to the housing.
Keypad and LCD Interface
MENU/SEL Button
Pressing this button enters the menu and selects
menu items to enter the setup screens.
BACK Button
Pressing this button returns to the previous menu or
screen.
POWER Button
Pressing this button turns the unit on or off.
Arrow Buttons
Used to navigate the menus. When on Main Screen,
UP Button will turn LEDs on and DOWN Button will
turn LEDs off.
ANALOG DIGITAL
Pin 1 CH 1 and CH 2 Shield/Gnd AES GND
Pin 2 CH 1 + AES CH 1
Pin 3 CH 1 - AES CH 2
Pin 4 CH 2 + --------------
Pin 5 CH 2 - --------------
TA5FLX connector
1
4
viewed from outside
5
3
2
Rio Rancho, NM
5
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