Lectrosonics DSR4 User manual

DSR4
Four Channel Digital Slot Receiver
DSR4-A1B1, DSR4-B1C1, DSR4-941, DSR4-961
INSTRUCTION MANUAL
Rio Rancho, NM, USA
www.lectrosonics.com
Fill in for your records:
Serial Number:
Purchase Date:
• Four independent channels, compact
design
• Two diversity options for maximum
exibility
• 24 bit/48 kHz digital for awless audio
• AES 256-bit, CTR mode encryption, with
4 dierent key policies available
• High IP3 performance of +15 dBm for
tough RF environments
•Analog and AES3 digital audio outputs
• External DC powering options and USB
input for rmware updates and data
transfer
scan for informational
product video

DSR4
LECTROSONICS, INC.
2
FCC Notice
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, may 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 o 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 dierent from that
to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Changes or modications to this equipment not expressly approved by
Lectrosonics, Inc. could void the user’s authority to operate it.
Installation & Operating Instructions
The following checklist includes the minimum required settings to start using the receiver:
• Install either a battery sled, camera slot adapter or other power source via EXT BOTTOM PLATE.
• Connect power to the receiver.
• Set the COMPAT (compatibility) mode for the transmitters to be used.
• Find clear operating frequencies for one or both receivers using SmartTune or manual scanning.
• Set transmitters on the matching frequencies, manually or by using 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.

Four Channel Digital Receiver
Rio Rancho, NM 3
Antenna Mounting and Orientation ..........................14
Firmware Update Instructions...................................16
Wireless Designer and Drivers..................................16
Antenna/Block Reference Table................................17
Diagnostics .................................................................18
Multi-channel System Checkout ...........................18
Supplied Parts and Accessories ...............................19
Optional Parts and Accessories................................19
Aligning Specialty Adapters ................................20
IR Reector: Purpose and Installation .....................22
Specications and Features......................................23
Troubleshooting..........................................................24
Service and Repair .....................................................25
Returning Units for Repair .....................................25
Table of Contents
DSR4 Block Diagram....................................................4
General Technical Description ....................................5
Installation & Operating Instructions..........................6
Front Panel Controls and Functions...........................6
MENU/SELECT Button...............................................6
PWR/BACK Button.....................................................6
Up/Down Arrow Buttons............................................6
Antenna Port...............................................................6
TA5M Connector and Pins.........................................6
Antenna Port (2)..........................................................6
IR (infared) Port ..........................................................6
USB Port.....................................................................6
Main Window Display...................................................7
Navigating the Menus ..................................................7
Menu Item Descriptions...............................................7
RF Setup Menu ..........................................................7
Smart Tune .................................................................7
DSR4 LCD Menu Map ..................................................8
Smart Tune (continued)............................................10
Frequency.................................................................10
Tuning Groups ..........................................................10
Named Group Entries (Party Dialing) ......................10
Scan..........................................................................10
Group Edit ...............................................................11
Vector Pairs .............................................................11
Pilot Bypass..............................................................11
TXInfo........................................................................11
Audio Setup Menu ......................................................11
Audio Level..............................................................11
Test Tone..................................................................12
Output Type .............................................................12
SmartNR ..................................................................12
Talkback...................................................................12
Polarity.....................................................................12
Compat Modes Menu.................................................12
IR & Keys Menu ..........................................................12
Send Frequency ......................................................12
Send All....................................................................12
Get Frequency.........................................................12
Get All ......................................................................12
Group Sync..............................................................12
Encryption Key Management .................................12
Encryption Keys ......................................................13
Send Key .................................................................13
Settings Menu.............................................................13
Lock/Unlock ...........................................................13
Backlight.................................................................13
RX On/Off ...............................................................13
TX Batt Type ...........................................................13
TX Batt Timer..........................................................13
TX Batt Icon............................................................13
AutoOn....................................................................13
Locale .....................................................................13
Default ....................................................................14
About ......................................................................14
IMPORTANT WARNING
The DSR4 is a high current receiver
that should not be used in a slot-mount
camera without double checking
available current from the camera.Many,
if not most, slot mount cameras are
designed for lower current receivers and
are current limited/fuse protected.The
DSR4 draws nearly 700mA at 7VDC. DO
NOT drop it in the camera to “see what
happens.” Consult with your camera
manufacturer FIRST before attempting
to use this receiver in-slot. 
The DSR4 is intended for use in slot
devices which can supply enough current
safely and without damage to fuses or
poly-fused circuits.
Lectrosonics will not be responsible
for damages that may result from
using this receiver in a slot mount
that cannot supply adequate current.

DSR4
LECTROSONICS, INC.
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DSR4 Block Diagram

Four Channel Digital Receiver
Rio Rancho, NM 5
Technical Description
The DSR4 digital 4-channel receiver is a much-requested,
versatile slot receiver, equally appropriate for bag use, as
well as reality TV and run and gun applications.
Extremely high Third Order Intercept (IP3) performance of
+15 dBm, 24-bit/48 kHz audio performance, and AES-
256 CTR mode encryption ensure that professionals in
all audio disciplines have the tools needed to get the job
done, even in extremely tough environments.
Compatibility Modes
The DSR4 receiver was designed to operate with Lec-
trosonics digital transmitters from the D2, DCH and M2
series. The receiver is also backward compatible with
Digital Hybrid Wireless® transmitters including those
with NA Hybrid, NU Hybrid, JA HYBRID and EU Hybrid
modes.
Encryption
The DSR4 receiver features AES 256-bit, CTR mode en-
cryption, with 4 dierent key policies available.
Diversity Options
An ideal diversity system constructively combines all the
energy available at both antennas. The DSR4 oers two
diversity options: for 4-channel operation, each channel
combines signals from both antennas in or out of phase,
depending on eld strength at each antenna and which
combination yields the best results. For 2-channel opera-
tion, receivers can be paired for Vector Diversity opera-
tion. The Vector subsystem smoothly and continuously
combines RF signals from both channels, with diering
phase angles in order to obtain maximum energy. The
four receivers in the DSR4 can be use separately or com-
bined in pairs.
RF Frequency Tracking Front-End
In addition to the extremely high IP3 capability of the
receiver, to signicantly reduce unwanted interference
and intermodulation problems, the DSR4 has a frequency
selective front-end section that tracks and tunes to the
desired signal frequency and rejects unwanted interfer-
ing signals. The low noise, high current RF amplier
was designed with feedback regulation for stability and
precise gain in order to handle stronger RF signals with-
out output overload. This produces a robust front-end
that is as selective as xed single frequency designs and
is suitable for use in close proximity to other receivers
and transmitters commonly used in eld production bag
systems.
Smart Noise Reduction (SmartNR
™
)
The DSR4 has been meticulously designed using the
best available low noise components and techniques.
Nonetheless, the wide dynamic range of digital and
Hybrid transmission technology, combined with at
response to 20 kHz, makes it possible to hear the -120
dBV noise oor 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 4k 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 reduce this noise
and thus increase the eective dynamic range of the
system, the DSR4 is equipped with a selectable Smart
Noise Reduction algorithm, which removes hiss without
sacricing high frequency response.
The Smart Noise Reduction algorithm works by attenuat-
ing only those portions of the audio signal that t a statis-
tical prole for randomness or “electronic hiss.” Desired
high frequency signals having some coherence such as
speech sibilance and tones are not aected.
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
default setting for Hybrid modes) enough noise reduc-
tion is applied to remove most of the hiss from the mic
preamp and some of the hiss from lavaliere microphones.
The noise reduction benet is dramatic in this position,
yet the degree of transparency maintained is exceptional.
When switched to FULL, enough noise reduction is ap-
plied 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 reduc-
tion comes at the cost of some transparency for low-
level room noise, yet the algorithm remains undetectable
under most circumstances.
Audio Output Level
A setup screen is provided for adjusting the audio output
level in 1 dB increments from -50 to +7 dBu using the
front panel MENU/SEL, UP, and DOWN buttons.
Test Tone
To assist in matching the audio levels of equipment con-
nected to the DSR4, a 1 kHz audio test tone, adjustable
from -50 to +7 dBu in 1 dB increments, is available at the
outputs. If using AES3 outputs, the level is xed and can-
not be adjusted.
Power Supply
The DSR4 is operated from an external DC power source
(DCR15/4AU recommended).The receiver has a built-in
Poly-Fuse for protection. This fuse automatically resets if
the power supply is disconnected for about 15 sec. The
power section also has protection circuits that prevent
damage to the receiver if a positive ground power source
is applied.

DSR4
LECTROSONICS, INC.
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Color LCD Display
The display has one primary “home” window. PWR/
BACK goes to receiver detail screens. UP/DOWN arrows
select channel.
After Power is turned o and back on again, the unit
defaults to the Main window and to the most recent
frequencies, audio levels, transmitter battery conditions,
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.
Power O
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 briey before the receiver switches o.
MENU/SEL Button
The MENU button accesses the available menus and
selects the desired setting.
PWR/BACK Button
The PWR/BACK button is used to turn the receiver on
and o. When browsing menus and making changes to
settings, press PWR/BACK to return to previous menu.
Up/Down Arrow Buttons
The UP/DOWN buttons are used to scroll or input the
various options within each menu selection.
Antenna Port (2)
TA5M Connector
Routes analog audio Channels 3 and 4 or AES3 audio
channels 1-4 to the top of the unit.
IR (infrared) Port
(just under the front panel)
Settings can be transferred between transmitter and
receiver or receiver and receiver.
USB Port
(just under the front panel)
The microB USB port can be used to connect the DSR4
to the Lectrosonics Wireless Designer software and to
perform rmware updates.
DSR4 Front Panel Controls and Functions
Audio Outputs
Audio outputs and the power inlet are located on the rear panel, accessed by a variety of dierent bottom-plate adapt-
ers. Depending on the slot receptacle or camera, either analog or digital outputs may be used by changing settings
in the receiver menu. In slots where two analog channels are accepted, audio channels 1 & 2 can be sent from the
receiver through the slot connector. In such cases, use the top connector to access audio channels 3 & 4. In slots that
accept 4 channels of audio via two balanced AES pairs, set the receiver outputs to AES3. Keep in mind that the top
panel TA5 connector will always be a duplicate of what is sent to outputs “3&4” in the audio output menu.
The front panel 5-pin connector (TA5 type) provides two balanced pairs with the following analog and AES3 pinouts:
Pin 1 Pin 2 Pin 3 Pin 4 Pin 5
Ground Audio 3 + Audio 3 - Audio 4 + Audio 4 –
DOWN Button
MENU/SELECT
Button
POWER/BACK
Button
UP Button
Receiver CH 1 Receiver CH 3
TA5
Input Receiver CH 2 Receiver CH 4
1
2
3
45
Pin 1 Pin 2 Pin 3 Pin 4 Pin 5
Ground AES 1/2+ AES 1/2- AES 3/4+ AES 3/4-

Four Channel Digital Receiver
Rio Rancho, NM 7
Main Window Display
The Main Window displays information concerning the
RF levels at each antenna per channel, audio modula-
tion levels, the condition of the Pilot Tone (Hybrid) or Link
(digital), and power conditions for both the receiver and
the associated transmitters. It is also the access portal to
menu selections for setting up the receiver and search-
ing for clear frequency channels.(See Menu Selections
from Main window and Frequency Scan Mode). The
PWR/BACK button will cycle between the Home screen,
showing all four channels and the channel detail screens.
Use the UP and DOWN arrows to go between individual
channels in the Channel Detail view.
• Receiver Power icon changes to a plug icon
when external power is supplied.
• Antenna Icons: Status of the vector diversity
system.
• RF Signal Strength Strip Charts: RF signal
strength indicators.
• Channel Status Indicator: Pilot tone, link and
encryption system status.
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 pages 8-9.
Menu Item Descriptions
RF Setup
Smart Tune
Smart Tune is the easiest and fastest way to scan the
local RF spectrum and nd clear operating frequencies.
The receiver will scan through the selected tuning band-
width and automatically nd “empty” areas within the
tuning range that have little or no RF energy. The receiver
will then be set to a frequency within an empty area and
prompt you to continue or use the IR function to sync to
a transmitter.
Note: Pressing BACK during an active scan will
restore the operating frequency to what it was
set at pre-scan.
Transmit frequency range is compatibility mode depen-
dent (see Compat Mode for further details). Rx 1-4 is
the rst screen you will see when you enter SmartTune.
After selecting Rx1-4, using the UP/DOWN buttons,
press MENU/SEL to open the TX Range page, then use
the UP/DOWN buttons to select the frequency range of
the transmitter.
After choosing the band, the unit will scan the available
frequency and choose the frequency with the lowest
interference and will display it as shown (the previous
frequency used and the new frequency identied).
Use the UP/DOWN arrows to toggle between them, then
MENU/SEL to choose.
Face the transmitter’s IR port within a few inches of the
receiver’s IR port and press the DOWN button to begin
the sync. In digital compat modes, if the sync is success-
ful, the message “IR Sync OK” will appear on screen. If
unsuccessful, the message will show “IR Sync Failed”.
For Hybrid compat modes, “Sync!” at the lower right will
blink, but the sync status will only show on the transmit-
ter’s display.
Channel
Audio Level RF Signal
Strip Chart
Antenna
Status
Compat
Mode
Block/
Hex Code
Channel
Channel
Status
Indicator
Frequency

DSR4
LECTROSONICS, INC.
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Main Menu Tree
Frequency
to pause scan
Select Freq or Grp with arrow buttons
to toggle.
Frequency 1
607.900
Grp u
Scan to select
channel. to zoom view.
When zoomed, press MENU/SEL +
UP or DOWN for fine tuning
Scanning... 1
607.000
Clear Scan
Data
Scan
data
CLEARED
Pilot Bypass
Select option with arrow buttons
to select.
Pilot Bypass
OFF
ON
* Pilot Tone Bypass
is only available in
Hybrid Compat
Modes
PWR
BACK
Select option with arrow buttons
to select.
Talkback Talkback 1
ON
PWR
BACK
Select option with arrow buttons
to toggle.
Select option with arrow buttons
to toggle.
After scan clears it automatically
reverts to back the main menu tree.
Select Rx1-4 with arrow buttons
to toggle
between Rx
and mode options .
Compat
Mode
CompatMode 1
D2
Select option with arrow buttons
to select.
Audio
Setup
Select option with arrow buttons
to select.
Output Type
Output Type
AES3 ANLG
Select option with arrow buttons
to toggle.
Polarity
PWR
BACK
Select option with arrow buttons.
Values are Off, Norm and Full.
to select.
Smart NR PWR
BACK
to get key.
to send key.
IR &
Keys
Select option with arrow buttons
to select.
Send Freq
Send All
Get Freq
Get All
IR
SYNC
OK
IR
SYNC
OK
IR
SYNC
OK
IR
SYNC
OK
RF Setup
Group Edit Group Edit u
(empty)
MENU + å to ADD
MENU + ãto DEL
Use arrows
to toggle
and add freq
range and
groups. Use
Down Arrow
to save.
* After adding a group,
navigate to SD Card,
then Save Group,
then Save to Card to
share groups with other
units.
Group Edit u
(empty)
Vector Pairs
Vector Pairs
1&2: Paired
3&4: Not Paired
TxInfo Rx 1
Block: A1B1
Step: 25
TxInfo
Test Tone Test Tone
Level: -48dB
Freq: 1000 Hz
Select option with arrow buttons
to select.
Lock/Unlock
RX On/Off
Backlight
Backlight
Auto On Auto On?
Always on
30 Seconds
5 Seconds
Select option with arrow buttons
to select.
Enabled
Disabled
Select option with arrow buttons
to select.
TXBat Icon
Select option with arrow buttons
to select.
Select option with arrow buttons
to select.
TXBat Timer
TX Bat Timer Select option with arrow buttons
to toggle.
Time: 1:33
No Alert
Settings
TXBat Type
Select option with arrow buttons
to select.
Locked
Unlocked
Select option with arrow buttons
to select.
Lock/Unlock
MENU+å to reset
PWR
BACK
PWR
BACK
PWR
BACK
PWR
BACK
PWR
BACK
Locale Locale
About
About DSR4
Select option with arrow buttons
to select.
Band A1B1
V1.05
/1.01
Default Restore
defaults?
No
Yes
Select option with arrow buttons
to toggle.
NA
EU
AU
to go back.
PWR
BACK
Audio Level
Audio Level
1 3
2 4
+7 +00
+7 +00
1&2 3&4
Smart NR
1 3
2 4
ON OFF
OFF OFF
Polarity
1 3
2 4
POS POS
POS POS
Sync --->
Send Freq Rx1
Sync --->
Send All Rx1
Sync --->
Get Freq Rx1
Sync --->
Get All Rx1
to get key.
Group Sync
IR
SYNC
OK
to get key.
Key Type
IR
SYNC
OK
Send
Group Sync
u
Group
Universal
Key Type
RX On/Off
1 3
2 4
ON OFF
OFF OFF
TXBat Type
1 3
2 4
LB50 AAalk
9VLth LB-50
Rx1
TXBat Icon
1 TI 3
2 4
VOLT TIME
BAR BAR
Smart Tune
Smart Tune
Rx 1
Rx 2
RX 3
to select.
Tx1 Range?
A1B1
A1
Use arrow buttons to toggle
through range options
to
select.
Searching...
470.600
Tuned Rx 1
525.100
Sync!
Selects an open frequency.
Choose Down Arrow to Sync.
to repeat and tune RX 2
Select option with arrow buttons
DSR4 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.
The menu headers are now in color, with symbols indicative of the menu section. Paging
through the tree, the heading bar of each individual submenu choice corresponds to the color
of the category it resides in. For example, RF Setup is green, and the heading bar of
Frequency, Scan, etc., are also green, indicating that these are submenu items of RF Setup.
Named Groups (Party Dialing)
Entry Editing
(from Group Edit submenu)
MENU/SEL shows Detail Page for Group
Entry, MHz eld is highlighted. UP/DOWN
changes numbers. MENU/SEL moves to
kHz.
MENU/SEL highlights Name eld. UP/
DOWN allows choice of letters/
numbers; 8 character limit. PWR/BACK
saves Name.
MENU/SEL moves cursor to Compat
Mode eld. Good practice to check, even
if no changes.
Press MENU/SEL and GO! will appear in
right corner. DOWN to save entries.

Four Channel Digital Receiver
Rio Rancho, NM 9
DSR4 LCD Menu Map
Main Menu Tree
Frequency
to pause scan
Select Freq or Grp with arrow buttons
to toggle.
Frequency 1
607.900
Grp u
Scan
to select
channel. to zoom view.
When zoomed, press MENU/SEL +
UP or DOWN for fine tuning
Scanning... 1
607.000
Clear Scan
Data
Scan
data
CLEARED
Pilot Bypass
Select option with arrow buttons
to select.
Pilot Bypass
OFF
ON
* Pilot Tone Bypass
is only available in
Hybrid Compat
Modes
PWR
BACK
Select option with arrow buttons
to select.
Talkback Talkback 1
ON
PWR
BACK
Select option with arrow buttons
to toggle.
Select option with arrow buttons
to toggle.
After scan clears it automatically
reverts to back the main menu tree.
Select Rx1-4 with arrow buttons
to toggle
between Rx
and mode options .
Compat
Mode
CompatMode 1
D2
Select option with arrow buttons
to select.
Audio
Setup
Select option with arrow buttons
to select.
Output Type
Output Type
AES3 ANLG
Select option with arrow buttons
to toggle.
Polarity
PWR
BACK
Select option with arrow buttons.
Values are Off, Norm and Full.
to select.
Smart NR
PWR
BACK
to get key.
to send key.
IR &
Keys
Select option with arrow buttons
to select.
Send Freq
Send All
Get Freq
Get All
IR
SYNC
OK
IR
SYNC
OK
IR
SYNC
OK
IR
SYNC
OK
RF Setup
Group Edit Group Edit u
(empty)
MENU + å to ADD
MENU + ãto DEL
Use arrows
to toggle
and add freq
range and
groups. Use
Down Arrow
to save.
* After adding a group,
navigate to SD Card,
then Save Group,
then Save to Card to
share groups with other
units.
Group Edit u
(empty)
Vector Pairs
Vector Pairs
1&2: Paired
3&4: Not Paired
TxInfo Rx 1
Block: A1B1
Step: 25
TxInfo
Test Tone Test Tone
Level: -48dB
Freq: 1000 Hz
Select option with arrow buttons
to select.
Lock/Unlock
RX On/Off
Backlight
Backlight
Auto On Auto On?
Always on
30 Seconds
5 Seconds
Select option with arrow buttons
to select.
Enabled
Disabled
Select option with arrow buttons
to select.
TXBat Icon
Select option with arrow buttons
to select.
Select option with arrow buttons
to select.
TXBat Timer
TX Bat Timer
Select option with arrow buttons
to toggle.
Time: 1:33
No Alert
Settings
TXBat Type
Select option with arrow buttons
to select.
Locked
Unlocked
Select option with arrow buttons
to select.
Lock/Unlock
MENU+å to reset
PWR
BACK
PWR
BACK
PWR
BACK
PWR
BACK
PWR
BACK
Locale Locale
About
About DSR4
Select option with arrow buttons
to select.
Band A1B1
V1.05
/1.01
Default Restore
defaults?
No
Yes
Select option with arrow buttons
to toggle.
NA
EU
AU
to go back.
PWR
BACK
Audio Level
Audio Level
1 3
2 4
+7 +00
+7 +00
1&2 3&4
Smart NR
1 3
2 4
ON OFF
OFF OFF
Polarity
1 3
2 4
POS POS
POS POS
Sync --->
Send Freq
Rx1
Sync --->
Send All
Rx1
Sync --->
Get Freq
Rx1
Sync --->
Get All
Rx1
to get key.
Group Sync
IR
SYNC
OK
to get key.
Key Type
IR
SYNC
OK
Send
Group Sync
u
Group
Universal
Key Type
RX On/Off
1 3
2 4
ON OFF
OFF OFF
TXBat Type
1 3
2 4
LB50 AAalk
9VLth LB-50
Rx1
TXBat Icon
1 TI 3
2 4
VOLT TIME
BAR BAR
Smart Tune
Smart Tune
Rx 1
Rx 2
RX 3
to select. Tx1 Range?
A1B1
A1
Use arrow buttons to toggle
through range options
to
select.
Searching...
470.600
Tuned Rx 1
525.100
Sync!
Selects an open frequency.
Choose Down Arrow to Sync.
to repeat and tune RX 2
Select option with arrow buttons

DSR4
LECTROSONICS, INC.
10
First, select receiver 1-4. Move the cursor again to the
group setting. Use the UP or DOWN buttons to select
among the four groups u, v, w, or x. Press MENU/SEL
again to move the cursor to the Name selector. Use
the UP or DOWN buttons to scroll among the available
names in the group, in alphabetical order, and the as-
sociated group frequency will change to match. Press
MENU/SEL to move the cursor to the Freq selector. Use
the UP or DOWN arrows to scroll the available frequen-
cies in the group in numerical order.
NOTE: If the frequency is blinking, it means
that the currently tuned frequency is not in
the selected group. If it is steady, it means
that the currently tuned frequency is in the
selected group. Choose No Group to exit the
group tuning mode and thus have access to
any frequencies within the tuning range of the
receiver.
To add or remove entries from a tuning group, see Group
Edit.
Named Group Entries (Party Dialing)
Entries created in Group Edit can now contain informa-
tion including the frequency, compatibility mode, and an
alpha-numeric combination, or name, up to 8 charac-
ters. These programmed entries can be shared between
devices that support this feature (DSR4, DCR822, DSR).
This feature, especially combined with the frequency
page shortcut (press UP and DOWN buttons together for
1 second from any menu location) can save time an eort
when managing large channel counts on location.
Scan
RF spectrum scan for the local area, shown in a graphical
representation. All receivers scan simultaneously, each
covering 25% of the total tuning range of the unit. Press
MENU/SEL to begin. When the scan has made at least
one complete round, Pause by pressing MENU/SEL
again. To resume scanning, press PWR/BACK, “scan”
should be highlighted in the menu, and press MENU/
SEL again.
Scan Zoom:
With the scan paused, press the UP+DOWN buttons to
zoom in and see a smaller (about 20 MHz) section of the
scan results. Pressing UP+DOWN again zooms out to
the full scan view.
To ne tune in Zoomed
scan: Press MENU/SEL,
then UP or DOWN arrow
buttons to tune the
selected receiver in 100
kHz steps.
Tuning the Receivers:
Either in the full scan view or zoomed in, press MENU/
SEL to choose which receiver to tune. A colored vertical
line within the scan will indicate which receiver is being
tuned. Now, use the UP or DOWN buttons to move the
receiver frequency. When zoomed out to the full scan
After the sync of Channel 1, choose MENU/SEL and the
screen will ask Do RX 2 Next? Use the UP/DOWN but-
tons to toggle between Yes and No; use MENU/SEL to
conrm. The screen will ask if you have Transmitter 1 on.
This ensures that the transmitters are tuned in a way that
they don’t interfere with each other.
Frequency
Allows manual selection or group tuning of the operat-
ing frequency for each of the four receiver channels. The
frequency setup screen has dierent elds depending on
the compat mode selected (see Compat Modes on p.12
for details). In digital modes, this page has four editable
elds: receiver (channel) number, group selector, group
entry name (if populated), MHz, kHz. The selected com-
pat mode for this channel, or this group entry if selected,
is at the bottom of the page. In Hybrid modes, this page
has ve editable elds: receiver (channel) number, group
selector, group entry name (if populated), MHz, kHz,
block, and legacy hex code. The selected compat mode
for this channel, or this group entry if selected, is at the
bottom of the page. The block selector can be used for
block disambiguation for any frequencies that overlap
between blocks 470 and 19, or between blocks 23-24
and 606.
Digital Mode Hybrid Mode
To manually tune: start by selecting Channel 1 - 4 in
the upper right corner by using the UP/DOWN buttons.
Then, press MENU/SEL to select the desired eld to
edit, using the UP or DOWN buttons. MHz value can be
changed in increments of 1 MHz by pressing the UP or
DOWN buttons. The kHz value can be changed in incre-
ments of 25 kHz by pressing the UP or DOWN buttons.
Pressing MENU/SEL and UP or DOWN at the same time
tunes in larger steps. In the MHz eld, in 10 MHz steps; in
the kHz eld, in 100 kHz steps.
NOTE: A convenient shortcut from any other
menu or page in the DSR4 directly to the
Frequency page is to press the UP and Down
buttons simultaneously and hold for about 1
second.
Tuning Groups
Tuning groups are an important feature within the RF Set-
up menu that allow the user to create, store, share, recall,
and use lists of frequencies with associated names and
compat modes, quickly and easily. Four tuning groups
are available, each containing 32 frequencies. See Group
Edit for how to set up and edit these tuning groups.
When a tuning group is assigned on the Frequency page,
the tunable frequencies are limited to those contained in
the group. Press MENU/SEL to move the cursor among
the available options, and UP and DOWN buttons to
change values.

Four Channel Digital Receiver
Rio Rancho, NM 11
Vector Pairs
In this mode, two receiver channels can be “paired” as
one receiver. Either Channels 1 and 2 or channels 3 and
4 can be combined into a pair. One receiver in a pair is
xed on Antenna A and the other receiver in a pair is
xed on Antenna B. The DSR4 automatically and opti-
mally combines the intermediate frequency signals.
Pilot Bypass
Allows the user to bypass the pilot tone on each channel
while in a Hybrid compat mode and defeats the pilot tone
squelch when on (no pilot tone is required). “O” means
that pilot tone must be present to allow audio output.
This setting is compatibility mode dependent. If this op-
tion is not available for the mode you have chosen, the
screen will show N/A.
WARNING: Without a carrier present (a
transmitter on), the audio will be unsquelched
noise.
TxInfo
Shows the Block and Step of each of the transmitters
associated with each channel (RX 1-4).
Depending on the compat
mode selected for the
channel, the tuning range
of the receiver (for Smart-
Tune functions) can be
restricted. First choose the
receiver channel using the
up & down arrows, then choose the desired band to
match the TX tuning range, then select the kHz tuning
step size.
Audio Setup
Audio Level:
Allows user to set Audio Output Level per channel and
allows user to enable audio tone for level setting. This
setting is Output Type dependent. If AES is chosen, there
are no adjustments available.
Test Tone:
A 100Hz-20kHz audio test tone, adjustable from -48 to
+0 dBu in 6 dB increments assists in matching the audio
levels of equipment connected to the DSR4. The tone
that is set is sent to all 4 channels.
view, the cursor will move in 1.6 MHz increments. Press-
ing and holding the UP or DOWN buttons will scroll at a
high rate. When zoomed in, pressing UP or DOWN will
move the cursor in 800 kHz increments. To tune in 100
kHz steps while zoomed, press and hold the MENU/SEL
button then press the UP or DOWN buttons.
Clear Scan:
Clears scan results. Highlight CLEAR SCAN in the menu,
then press MENU/SEL. The screen will quickly show
Scan Data Cleared.
Group Edit:
Allows the user to add, edit, or delete entries within the
available tuning groups. Use the UP or DOWN arrow but-
tons to highlight which group to edit, then press MENU/
SEL. If the selected group is empty, “New Entry…” will
be highlighted. Press MENU/SEL to create a new entry.
Use MENU/SEL to move the cursor among the editable
elds. For MHz and kHz, use the UP or DOWN buttons
to select the desired numerical values.
With the Name eld highlighted, use the UP or DOWN
buttons to choose the desired letters or numbers, and
the MENU/SEL button to move the cursor to the next
slot in the name eld. Up to 8 characters are available.
When the name is complete, press the BACK button.
Then, press MENU/SEL to move the cursor to the Com-
pat Mode selection. Use the UP or DOWN buttons to
select the desired compat mode for this entry.
Press MENU/SEL and “GO!” will appear at the lower
right corner of the display. Press the DOWN button to
save the entry.
NOTE: For any frequencies in a block overlap
area (blocks 470/19, 23/606/24) and a Hybrid
mode is selected, it is important to also define
which block is desired for proper operation,
otherwise there may be a pilot tone conflict.
Editing Existing Entries:
Editing group entries is done the same way they were
created, with the exception of the “Del” (delete) box. To
delete an entry, press MENU/SEL to navigate to the de-
lete box, then use the UP or DOWN buttons to select or
unselect, press MENU/SEL and “GO!” will appear at the
bottom right. Press the DOWN button to complete.
NOTE: If the Compat mode shows “no change,”
this means that when this group entry is pulled
up in the Frequency page, whatever Compat
mode was previously set for that receiver
channel (including from a previous Group Entry),
it will remain unchanged. If you’re using all of the
same type of transmitter (all DBSMs, etc.), this
setting will work well. However, for frequency
groups of mixed transmitter types (such as
SMWBs and DBSMs), it is recommended to
enter the Compat Mode for every group entry, to
avoid issues later.

DSR4
LECTROSONICS, INC.
12
Output Type
Allows user to choose output for each channel, analog or
AES3.
Smart NR:
Allows user to enable Smart Noise Reduction on one
or all receiver channels. Settings are: O, Normal and
Full. The default setting for digital compatibility modes is
“O.” The default setting for hybrid modes is “Normal.”
Talkback:
Allows user to enable the Talkback (TB) function to deter-
mine where the TB outputs are routed, and to select how
the TB signals interact with the normal program audio on
those outputs. If “O” is selected for a receiver chan-
nel, then no Talkback function will occur on that chan-
nel, even if the transmitter’s programmable switch is set
to “TB” and activated. “Override” indicates that if a TB
command comes from the transmitter, then the TB audio
goes to the specied receiver output, and the normal
audio from that channel is muted. “Mix” indicates that the
TB audio and the standard audio routed to that receiver
output will be mixed to that output. “TB Only” indicates
that the normal audio routed to that output is muted, and
only the TB audio will be present, and, only when the TB
command is activated on the transmitter.
Polarity:
Allows user to set audio polarity of each channel as either
positive or negative.
Compat Modes
Allows user to set compatibility mode per receiver chan-
nel. Available modes are: mono digital modes D2 and
HDM (High Density Mode); stereo digital modes Duet
channels 1-2, and DCHX (encrypted) channels 1-2; and
mono Hybrid modes: NA Hybrid, NU Hybrid, EU Hybrid,
and JA Hybrid. EU and JA modes are not available for
Block 941.
IR & Keys Menu
The operations below depend on the compatibility mode
selected and the transmitter used. The DSR4 has two-
way IR for use with digital products (DBu, DBSM, etc.)
and one-way IR for use with older IR-capable units such
as LT and HMa. One-way protocol can only “Send Fre-
quency.”
NOTE: You must position the transmitter’s IR
port directly in front of the DSR4 IR port, as
closely as possible, to guarantee a successful
sync. Also see page 22 for information on front
panel sync, for bag and other close set-ups.
Send Frequency
Sends operating frequency to the transmitter, each chan-
nel separately. Press the UP button to send the Channel
1 frequency, and the DOWN button to send the Chan-
nel 2 frequency. Success for digital compat modes is
indicated on the receiver as “IR Sync OK.” For digital
modes, failure will be indicated on the receiver as “IR
SYNC FAILED.” For Hybrid compat modes, success will
be indicated on the transmitter as “IR SYNC.” Failure
will be indicated on the transmitter as “CP Err” or “Block
Mismatch” depending on the transmitter model and the
source of the error.
Send All
(available only for digital compat modes)
Sends frequency, channel name/s, and Talkback state to
the transmitter. Press the UP button to send the informa-
tion from Channel 1, and the DOWN button to send the
information from Channel 2. Since two-way IR Sync is
only available for digital transmitters, “N/A” will be next
to any channels that are in a Hybrid compatibility mode.
Get Frequency
(available only for digital compat modes)
Send or retrieve (get) frequency from the transmitter.
Choose encryption type by pressing the UP and DOWN
buttons. Select MENU/SEL to get frequency.
Get All
(available only for digital compat modes)
Retrieve (get) transmitter’s frequency, Talkback state, and
channel name. Press the UP button to get all and use for
Channel 1. Press the DOWN button to get all and use for
Channel 2. Since two-way IR Sync is only available for
digital transmitters, “N/A” will be next to any channels
that are in a Hybrid compatibility mode.
Group Sync
These functions allows you to send or get Tuning groups
via IR sync to/from transmitters and receivers capable
of using Groups (DSR4 , DCHR, DBSM, DBSMD, DPR,
DCR822, DPR-A). Use MENU/SEL button to choose the
send/get mode. Then, press MENU/SEL again and “Go”
will appear in the lower right corner. Press the DOWN
button to complete the sync operation.
Encryption Key Management
The DSR4 has four options for encryption keys:
• Universal: This is the most convenient and basic
option available, and the default setting on all
Lectrosonics D2 digital units. All encryption-
capable Lectrosonics transmitters and receiv-
ers contain the Universal key. The key does not
have to be generated in the DSR4. Simply set the
Lectrosonics encryption-capable transmitters and

Four Channel Digital Receiver
Rio Rancho, NM 13
receivers to Universal key type, and the encryption
is in place. This allows for convenient encryption
amongst multiple transmitters and receivers, but is
not as secure as creating a unique key.
• Shared: This key policy is designed for sports cov-
erage and similar applications where a unique key
provides enhanced security, but multiple transmit-
ters and receivers can share the same key. Once
generated by the receiver, the key can be trans-
ferred via IR to transmitters or additional receivers.
• Standard: This key policy provides excellent se-
curity, second only to the Volatile key policy. Once
a unique key is created in the receiver, it can be
transferred via IR only to transmitters, but not to
other receivers. The receiver tracks the number of
times the key is transferred. Once a Standard key
has been transferred 256 times, an alert will indi-
cate that a new key must be created.
• Volatile This is the most robust key policy available.
After a unique key is created, it can be transferred
only to transmitters, not other receivers. If a trans-
mitter is powered o, it must have the key sent to
it again from the receiver. If the receiver is powered
o, a new key must be generated and sent to the
transmitters. In encryption terms, this is the “one
time use” key management policy.
Encryption Keys
The DSR4 generates high entropy encryption keys to
sync with encryption-capable transmitters. The user must
select a key type and create a key in the DSR4, and then
sync the key with the transmitter.
1. Begin by selecting a Key Type.
IR&Keys --> Key Type --> Universal, Shared, Stan-
dard or Volatile.
2. Next, if using the Shared, Standard or Volatile key
type, select MAKE KEY to generate a new key.
Select “Yes” to conrm Make Key. IR&Keys -->
Make Key.
NOTE: When Universal Key type is selected,
there is no prompt to create key, as it is not
necessary.
3. A message will indicate 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
Select SEND KEY to transfer the encryption key to any
compatible transmitters or, in Shared key policy, addi-
tional receivers. Success will be indicated by the mes-
sage “Encryption Key Sent” on the receiver display, and
“Encryption Key Received” on the transmitter display.
IR key transfer failure will be indicated by the message
“IR Sync Failed” on the receiver display.
Settings Menu
Lock/Unlock
The user can lock or unlock the receiver. In Locked con-
dition, the menus and settings can be browsed but not
changed. Attempting to change a setting or power o the
unit while in the locked condition causes the message
“Settings Locked” to appear on the screen. The Lock/
Unlock condition will persist through battery changes or
external power being removed.
Backlight
The user can set the backlight to be Always On or stay lit
for 5 seconds or 30 seconds after the last button press
on the interface. To set, use the UP/DOWN buttons to
select and save.
RX On/O
This function allows you to power o one or both receiver
channels when not in use, to save power in a portable
DC-powered system. Press the MENU/SEL button to
select Channel 1 or Channel 2. Use the UP and DOWN
buttons to turn on or o the selected receiver. The power
savings is roughly 180 mW per channel.
Tx Batt Type
Choose between Bar, Volt or Time. Use MENU/SEL to
select the channel and the UP and DOWN buttons to
change values.
Tx Batt Timer
Choose between Bar, Volt or Time. Use MENU/SEL to
select the channel and the UP and DOWN buttons to
change values.
Tx Batt Icon
Choose between Bar, Volt or Time. Use MENU/SEL to
select the channel and the UP and DOWN buttons to
change values.
AutoOn
Press the UP or DOWN buttons to enable or disable the
auto power on function. With this function enabled, the
unit will power up upon the application of external DC
power.
Locale
The locale should be chosen based on the region where
the receiver is being used. There are three options avail-
able:
- NA: (default setting) represents the North Ameri-
can locale and prevents operation in the
Astronomical Band (from 608 to 614 MHz).
- EU: represents the European locale, and has un-
restricted operation over the entire band of the de-
vice: 470.100 to 614.375 MHz for A1B1. For B1C1,
the range is 537.600 to 691.175 MHz.

DSR4
LECTROSONICS, INC.
14
- AU: represents the Australian locale, and has un-
restricted operation over the entire band of the de-
vice: 520.000 to 614.375 MHz for A1B1. For B1C1,
the range is 537.600 to 691.175 MHz.
Default
This setting restores the unit to factory settings.
About
Displays general information about the DSR4 , including
band, microcontroller and FPGA versions. The microcon-
troller version number is the rst number under the band,
followed by the FPGA version number after the forward
slash.
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 regardless
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 posi-
tion with the whips oriented vertically.
Fig. 3 depicts the receiver and antenna whips oriented
horizontally, which places the null of the receiver antenna
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 transmit-
ter so that the whip is vertical and not in direct contact
with the wearer’s body or metallic objects in clothing and
costuming.
Tx
STRONG
SIGNAL
WEAK
SIGNAL
Rx
Rx
Tx
WEAKEST
SIGNAL
Rx
Tx
Tx
STRONG
SIGNAL
Rx
Fig. 1
Fig. 2
Fig. 3
Fig. 4

Four Channel Digital Receiver
Rio Rancho, NM 15
SNA600A Omni Dipole 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 tunable
from 550 to 800 MHz; however, the roll-o above and be-
low this band is gradual. The SNA600a measures lower
than a 2:1 SWR (Standing Wave Ratio) from 465 MHz to
850 MHz when the antenna arms are fully extended.
Half-Power (-3 dB) Points
Antenna Scale
Center Frequency
A “bendable” mounting strap is included that allows
vertical orientation on a variety of surfaces. Several other
adapters are also available for temporary or xed instal-
lations.
This is one example of using two splitters to feed two
receivers.
Use Lectrosonics P/N 21770 BNC (F) to SMA (M) adapter;
Pomona P/N 4290
SNA600A
COAXIAL
CABLE
ZSC24
SPLITTER
AMJ Jointed Antenna
The AMJ 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 posi-
tion of the receiver.
The hinged joint pivots in both directions

DSR4
LECTROSONICS, INC.
16
Firmware Update
Instructions
Firmware updates are made through Wireless Desiger,
with a le downloaded from the web site and the DSR4
connected via USB. The USB port on the receiver re-
quires a micro-B male plug on the connecting cable. The
other end of the cable would normally be a USB A-Type
male connector to t the most common type of USB jack
used on computers.
Be aware of the following when preparing to connect
your DSR4 to Wireless Designer via USB:
The DSR4 must have the micro and FPGA rmware both
updated to v1.01 or higher. Wireless Designer version
must be at least 2.0.39 for macOS, or version 2.0.42 or
higher for Windows. These are available on our Support
website at: https://lectrosonics.com/support.html.
Refer to Help in Wireless Designer software for the up-
date procedure.
NOTE: If your Wireless Designer does not
“recognize” the DSR4 and you are using the
most updated version, your USB drivers may
need to be updated. This is not a procedure that
needs to be done often. You can find a folder
with the most updated drivers on the Wireless
Designer section of our Support page.

Four Channel Digital Receiver
Rio Rancho, NM 17
Antenna/Block Reference Table
The two AMJ whip antennas supplied with the receiver are factory cut to specic frequency blocks as shown in the
table below. A colored cap and label are used on blocks 20 through 26, 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 specically 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
dierent than those shown in this table, but since the bandwidth is typically wider than the specied block, the exact
length is not critical for useful performance in whip, dipole and coaxial designs.
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
Note: Not all Lectrosonics products are built on all of the blocks covered in this chart.
A1
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
B1
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
C1
24 614.400 - 639.900 Yellow w/Label 4.07” 103.4 mm
25 640.000 - 665.500 Green w/Label 3.87” 98.3 mm
26 665.600 - 691.100 Blue w/Label 3.68” 93.5 mm
941/961 941 941.525 - 959.825 Black w/Label 2.53” 64.3 mm
961 961.100 - 1014.900 Black w/Label 2.53” 64.3 mm
FREQUENCY
BLOCK RANGE CAP COLOR ANTENNA WHIP LENGTH

DSR4
LECTROSONICS, INC.
18
Diagnostics
Multi-channel System Checkout
Interference can result from a wide variety of sources
including TV station signals, other wireless equipment in
use nearby, or from intermodulation within a multi-chan-
nel wireless system itself. Regardless of how the fre-
quencies were coordinated, a nal checkout procedure
is always a good idea.
Scanning with the RF spectrum analyzer built into the
DSR4 system will identify external RF signals, but it does
not address the compatibility of the selected frequen-
cies.
The pre-coordinated frequencies address in-system
intermodulation, but obviously cannot take into account
RF signals from external sources that may be present in
the location where the system will be operating.
1. Set up the system for testing.
Place antennas in the position in which they will be
used and connect to the receivers. Place trans-
mitters about 3 to 5 feet apart, about 25 to 30
feet from the receiver antennas. If possible, have
all other equipment on the set, stage or location
turned on as well, especially any mixing or record-
ing equipment that will be used with the wireless
system.
2. Set all receivers on clear channels.
Turn on all receivers, but leave the transmitters
o. Observe at the RF signal strength indicator
for each receiver module. If a signal is present,
change the frequency to a clear channel where
no signal is indicated. If a completely clear chan-
nel cannot be found, select the frequency with the
lowest RF level indication. Once all receiver mod-
ules are on clear channels, go to step 3.
3. Turn each transmitter on one at a time.
Start with all transmitters turned o. As you turn
on each one, look at the matching receiver to
verify a strong RF signal is received. Then, look at
the other receivers and see if one of them is also
picking up the signal. Only the matching receiver
should indicate a signal. Change frequencies on
either system slightly until all channels pass this
test, then check again to see that all channels are
still clear as done in step 2.
4. Turn each transmitter o one at a time.
With all transmitters and receivers turned on, turn
each transmitter o one at a time, in turn, and look
at the RF level indicator on the matching receiver
module. The RF level should disappear or drop to
a very low level. If it does not, change frequency on
that receiver and transmitter and try it again. When
a clear frequency is found, turn the transmitter on
and move on to the next channel.
IMPORTANT: Any time a frequency is changed
on any of the systems in use, you must start at
the beginning and go through this procedure
again for all systems. With a little practice, you
will be able to do this quickly and save yourself
some “multi-channel grief.”

Four Channel Digital Receiver
Rio Rancho, NM 19
27372
IR Reector. Replacments can be ordered separately
using this part number.
27373
Adhesive Strip. Replacments can be ordered separately
using this part number.
AMJ19
Swivelling Whip Antenna with Standard SMA Connector,
Block 19. Ships with A1B1 units only.
AMJ22
Swivelling Whip Antenna with Standard SMA Connector,
Block 22. Ships with A1B1 and B1C1 units.
AMJ25
Antenna with swiveling SMA connector. Shipped with
B1C1 units only.
Supplied Parts and
Accessories
AMJ944
Antenna with swiveling SMA connector. Shipped with
941 units only.
AMJ961
Antenna with swiveling SMA connector. Shipped with
961 units only.
Optional Parts and
Accessories
21770
Male SMA to Female BNC Adapter.
21926
MicroB USB cable for rmware updates.
28979
Replacement screws (4) for 36016 DSR4 mounting bezel
kit.
ACOAXTX
Antenna, Coaxial, SMA Plug; Specify Block.
DCR15/4AU
Power Supply, 4ADC 100-240V In, 15VDC Regulated
Output.
Ships With
A1B1 (2) AMJ19; (2) AMJ22
B1C1 (2) AMJ22; (2) AMJ25
941 (2) AMJ944
961 (2) AMJ961

DSR4
LECTROSONICS, INC.
20
Aligning Specialty Adapters
Per customer suggestion, we have incorporated
alignment marks into our DSR4 adapters and
battery sleds. You can easily conrm that the units
are aligned correctly by the “bowtie” shape of the
engravings.
DSR4BATTSLEDTOP
A “battery sled” that positions the battery on top of
the receiver for mounting on the top of the camera
with the LCD and rear panel nomenclature oriented
correctly. Two TA5 audio connectors and one DC
coaxial connector.
DSR4BATTSLEDBOTTOM
A “battery sled” that positions the battery on
the bottom of the receiver for mounting on the
bottom of the camera with the LCD and rear panel
nomenclature oriented correctly. Two TA5 audio
connectors and one DC coaxial connector.
DSR4DB25
DSR4 Superslot adapter connector plate for Sound
Devices SL-2. This includes the adapter plate only
with the two mounting screws plus one extra screw.
DSR4EXT
Adapter kit for DSR4 receiver, two TA5 audio output
jacks, locking power connector, includes 6’ power
cord. Has spare mounting screws in dummy holes in
adapter.
DSR4EXTUSB Adapter
This kit includes an output and power panel with two
TA5 male balanced output pairs, and a locking Hirose-4
DC power jack. A USB-C jack allows for connection of
the DSR4 to Wireless Designer for monitoring, channel
setup, scanning, and frequency coordination. Firmware
updates must be done with the USB Micro B connector
on the top panel of the unit. Power cord not included;
order PS200A or use equivalent.
DSR4OCTOSPACER
DSR4 mounting bezel (bezel is P/N 36016) kit with 4
screws (P/N 28979) for Octopack and Quadpack, no
connector included. WARNING: Do not use Hirose
4 DC connector on the Octopack when mounting
DSR4 receivers.
DSR4SUPER
DB-25 bottom plate adapter for DSR4 receivers used in
SuperSlot docks. This includes: The end plate adapter,
black bezel (PN 27315-1), gasket and hardware set.
MCTA5TA3F2
Audio cable for portable digital receivers, TA5F to two
TA3F connectors, 18” cable. For two analog balanced
receiver outputs, or two AES digital pairs (four audio
channels), into mixer or recorder inputs.
MCTA5TPT2
Audio cable for portable digital receivers, TA5F to two
stripped and tinned wires, 18” cable. For two analog
balanced receiver outputs, or two AES digital pairs (four
audio channels).