Lectrosonics DSR4-A1B1 4-Channel Digital Slot Receiver, 470.100 - 607.950 MHz

The DSR4 digital receiver provides the highest level of RF and audio performance available with a versatile feature set in a compact design for field and location production. Settings can be made from the front panel with tactile buttons and color LCD interface, making the unit ideal for use in portable bag systems and on sound carts. An RF spectrum analyzer and SmartTune are built into the receiver to alleviate interference problems in an increasingly congested RF spectrum.

The mechanical design of the receiver fits into the Super-Slot ecosystem and combines field-proven features developed over many years of experience in motion picture and television production. To decrease weight, the DSR4 provides a four channel receiver in one unit powered by external DC. The receiver is also equipped with an IR port for data transfer between units. The machined aluminum housing and panels are surfaced with a hardanodized finish with laser etched markings to withstand the rigors of field production.

The RF gain stages in the front end use a newly developed design to provide low noise RF amplification, excellent sensitivity and extremely low susceptibility to intermodulation and de-sensitization.

5 Short “deep dive” videos on key features and functions in the DSR4 receiver
Features, capabilities, and how-tos in these videos include independent tuning ranges and compat modes, RF spectrum scanning, manual tuning, Smarttune auto frequency selection, and tuning groups with names and compat modes, known as “Party Dialing.”

Key Features

• Two diversity options for maximum flexibility
• 24 bit/48 kHz digital for flawless audio
• AES 256-bit, CTR mode encryption, with 4 different 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 firmware updates (Wireless Designer pending) and data transfer
• Full integration with Sound Devices 8-Series mixer/recorders with v1.09 firmware and 8-Series v9.30

Technical Specifications

Frequency Selection Steps
25 kHz
Frequency Stability
±0.001 %
Front end bandwidth
±5.5 MHz, @ -3 dB
Sensitivity
20 dB Sinad 0.9 uV(-108 dBm), A weighted
60 dB Quieting 1.12 uV (-105 dBm), A weighted
AM rejection
>60 dB, 2 uV to 1 Volt
Modulation acceptance
85 kHz
Spurious rejection
85 dB
Third order intercept
+15 dBm
Diversity method
Antenna phase switching (4 channel operation)
Vector diversity (2 channel operation)
Antenna inputs
50 Ohm; SMA female connectors
Audio output connectors
Interchangeable D connector adapters or camera slot interfaces
Dual TA5 male (mini XLR) balanced output adapter
Battery sled adapters with TA5 male outputs.
Front panel TA5 male for AES3 outputs or analog output channels 3 and 4.
Frequency Response
25 Hz to 20 kHz (+0/-3 dB)
THD
0.2% (typical)
Input Dynamic Range
125 dB (with full Tx limiting)
Overall Latency (time delay)
1.6 ms with digital source, <2.9 ms with Hybrid TX
Audio Test Tone
1 KHz, -50 to +7 dBu, <1%THD
Controls
Front Panel
Color LCD display
Menu/Sel, Pwr/Back, Up/Down Arrow

Buttons
USB Port
IR Port

Rear Panel
Proprietary connector for audio/power accessory panels.
External Power
Minimum 9 Volts to maximum 17 VDC
4.1 W; 240mA at 18 VDC.
Operating Temp. Range
-20 to 40°C; -5 to 104°F
Weight
408 grams (14.4 oz.) w/o audio adapter
Dimensions
3.23” wide x 1.23” high x 5.50” deep 82 wide x 31 high x 140 deep mm
Included Accessories
1 - Quickstart Guide
1 - PN 27372 - IR Reflector
1 - PN 27373 - Adhesive strip for attaching IR Reflector
2 - AMJ-19 jointed SMA antennas
2 - AMJ-22 jointed SMA antennas