Lectrosonics DSR-A1B1
MPN #DSR-A1B1
2-channel digital slot receivers with analog and AES3 digital audio outputs and compatibility with the D-Squared and Duet digital transmitters
The DSR digital receivers provides the highest level of RF and audio performance available with a versatile feature set in a compact design for camera mounted applications. Settings can be made from the front panel, making the unit ideal for use in camera hop configurations, in bags and on sound carts. An RF spectrum analyzer and SmartTune are built into the receivers to alleviate interference problems in an increasingly congested RF spectrum.
The mechanical design of the receivers fits into the SuperSlot ecosystem and combines field-proven features developed over many years of experience in motion picture and television production. To decrease weight, the DSR/DSR5P provide a two channel receiver in one unit powered by external DC. The receivers are also equipped with an IR port for data transfer between units. The machined aluminum housing and panels are surfaced with a hard-anodized 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.
Vector Diversity
An ideal diversity system constructively combines all the energy available at both antennas. Traditional "true diversity" or "ratio diversity" methods use two complete receivers and blend the audio. This works well for FM and Digital Hybrid systems, but falls short of the ideal for today's all-digital modes. The DSR/DSR5P's Diversity subsystem smoothly and continuously combine RF signals from two receiver front ends per channel, with differing phase angles in order to obtain maximum energy. Not only does this method deliver clean, artifactfree performance in all modes, it is actually able to take two signals compromised by multi-path interference and reassemble them into a usable signal.
Compatibility
The DSR and DSR5P offer compatibility with the D-Squared and Duet digital transmitters, including the DBu, DHu, DPr, DBSM, DCHT, and M2T, and backward compatibility with any Digital Hybrid Wireless transmitters including the SM and SMWB series, WM, HM Series, MM400 Series, HH Series, LT, LMb, UM400 Series, and SSM.
SmartNR
With a noise floor at -120 dBV and a frequency response to 20 kHz, high frequency noise in the source audio is more apparent than in conventional wireless systems.
The SmartNR algorithm has three modes. When OFF, no noise reduction is performed. When NORMAL is selected, enough noise reduction is applied to remove most of the hiss from the mic preamp and some of the hiss from lavaliere microphones. When FULL is selected, enough noise reduction is applied to remove most of the hiss from nearly any signal source of reasonable quality, assuming levels are set correctly at the transmitter.
Features
Two independent channels, compact designVector diversity for superior performanceLatest generation of SR Series: Compatible with huge existing ecosystemCompatible with D2, HDM, Duet and DCHXDigital modes and all hybrid modes24 bit/48 kHz digital for flawless audioAES 256-bit, CTR mode encryption, with 4 different key policies availableAnalog and AES3 digital audio outputsExternal DC powering options and USB input for firmware updates and data transfer
Specifications
Operating Frequencies (MHz):
Model A1B1: 470.100 - 614.375
NOTE: It's the user's responsibility to select the approved frequencies for the region where the transmitter
is operating.
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: +11 dBm
Diversity method: Vector diversity
Antenna inputs: 50 Ohm; SMA female connectors
Audio output connectors:
Interchangeable D connector adapters or camera slot interfacesDual TA3 male (mini XLR) balanced output adapterBattery sled adapters with TA3 male outputs.Audio Performance (overall system):
Frequency Response: 25 Hz to 20 kHz (+0/-3 dB)
THD: 0.2% (typical)
SNR at receiver output (dB):
SmartNR No Limiting w/Limiting
OFF 103.5 108.0
NORMAL 107.0 111.5
FULL 108.5 113
Note: The dual envelope "soft" limiter provides exceptionally good handling of transients using variable attack and release time constants. Once activated, the limiter compresses 30+ dB of transmitter input range into 4.5 dB of receiver output range, thus reducing the measured figure for SNR without limiting by 4.5 dB.
Input Dynamic Range: 125 dB (with full Tx limiting)
Overall Latency (time delay): 1.4 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 displayMenu/Sel, Pwr/Back, Up/Down Arrow ButtonsUSB PortIR PortRear Panel:
Proprietary connector for audio/power accessory panels.
External Power: Minimum 9 Volts to maximum 17 VDC 2.7 W; 225 mA at 12 VDC
Weight:
DSR 164 grams (5.8 oz.) w/o audio adapter
DSR5P 195 grams (6.9 oz.)
Dimensions: 3.23" wide x 1.23" high x 5.50" deep
82 wide x 31 high x 140 deep mm
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