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Lectrosonics DBSM - Digital Transcorder (A1B1 Band / 470 - 608 MHz)

 
  • Dale #:

    LECT-DBSMA1B1
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Description

The DBSM and DBSMD digital transcorders were developed specifically for the needs of the film industry and offer time code jam sync capability. They offer hands free setup and adjustment using audible tones and can be put to sleep to conserve battery power during setup while buried inside costumi... Read More

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Description

The DBSM and DBSMD digital transcorders were developed specifically for the needs of the film industry and offer time code jam sync capability. They offer hands free setup and adjustment using audible tones and can be put to sleep to conserve battery power during setup while buried inside costuming, then awakened for normal operation when the production begins. Other features include input gain adjustment in 1 dB increments over a 44 dB range and adjustable low frequency audio roll-off for 3 dB down points at 20, 35, 50, 70, 100, 120 or 150 Hz to control subsonic and very low frequency audio content. The transmitters also offer selectable output power of 10, 25 and 50 mW. A special high-density (HDM) transmit mode at 2 mW allows for ultra-tight channel spacing without concern for frequency coordination.

The input section features the unique Lectrosonics servo bias input circuitry with a standard TA5M type jack for use with electret lavaliere mics, dynamic mics, or line level signals. A DSP-controlled analog audio limiter is employed ahead of the first mic preamp to protect the entire audio chain from overload. The limiter has a range of more than 30 dB for excellent overload protection, and a dual release envelope that makes the limiter acoustically transparent while maintaining low distortion of brief transients and longer duration peaks.

A water resistant control panel with OLED, membrane switches and multi-color LEDs make input gain adjustments, frequency and compatibility mode selection quick and accurate. The battery compartment accepts industry-accepted AA batteries (lithium recommended).

The DBSM and DBSMD use the same accessories as the SMWB and SMDWB transmitters, specifically belt clips, pouches, and battery eliminators.

Features:

  • RF Power selections at 10, 25 and 50 mW
  • Ultra-lightweight, corrosion resistant housing
  • OLED interface with lockout option
  • Servo Bias input circuitry
  • 2-way IR (infrared) port for fast setup
  • Alternate use as recorder on internal microSDHC memory card at 48 kHz, 24 bits
  • Timecode jam-sync capability with
  • High density mode for ultra-tight channel spacing

Included Accessories:

  • 1 - AA battery
  • 1 - AMM-19 antenna
  • 1 - AMM-22 antenna
  • 1 - SMWBBCUPSL belt clip
  • 1 - PSMWB pouch with swivel clip
  • 1 - SMKITTA5 Connector kit with boot
  • 1 - 55010 - 16 GB microSD card

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Product Specs

Operating frequencies DBSM(D)-A1B1: Band A1-B1: 470.100 - 607.950
DBSMD(D)/E01-A1B1: Band A1-B1: 470.100 - 614.375
Channel Spacing 25 kHz
RF Power output DBSM: 2 (HDM only), 10, 25 or 50 mW
DBSMD 2 (HDM only), 10, 25 or 50 mW
Compatibility Modes DBSM/DBSMD: D2 digital with encryption, and HDM high density digital with encryption
Modulation Type 8 PSK
Frequency stability ± 0.002%
Spurious radiation Compliant with ETSI EN 300 422-1
Equivalent input noise –125 dBV, A-weighted
Input level If set for dynamic mic: 0.5 mV to 50 mV before limiting
Greater than 1 V with limiting
If set for electret lavaliere mic: 1.7 uA to 170 uA before limiting
Greater than 5000 uA (5 mA) with limiting
Line level input: 17 mV to 1.7 V before limiting
Greater than 50 V with limiting
Input impedance Dynamic mic: 300 Ohms
Electret lavaliere: Input is virtual ground with servo adjusted constant current bias
Line level: 2.7 k ohms
Input limiter Soft limiter, 30 dB range
Bias voltages Fixed 5 V at up to 5 mA
Selectable 2 V or 4 V servo bias for any electret lavaliere
Gain control range 7 to 44 dB; panel mounted membrane switches
Modulation indicators Dual bicolor LEDs indicate modulation
–20, -10, 0, +10 dB referenced to full modulation
Controls Control panel w/ LCD and 4 membrane switches
Low frequency roll-off Adjustable from 20 to 150 Hz
Input
Type Analog mic/line level compatible; servo bias preamp for 2V and 4V lavaliere microphones
Input level • Dynamic mic: 0.5 mV to 50 mV
• Electret mic: Nominal 2 mV to 300 mV
• Line level: 17 mV to 1.7 V
Input connector TA5M 5-pin male
Audio Performance
Frequency response 20Hz to 20kHz, +/- 1dB: D2 Mode
20Hz to 16KHz, +/- 3dB: High Density (HDM) Mode
Dynamic range 112 dB (A)
Distortion < 0.035%
Antenna Flexible, unbreakable steel cable
Battery AA (+1.5 VDC), disposable, Lithium recommended
Weight w/ battery(s) DBSM-A1B1: 3.2 oz. (90.719 grams)
DBSMD-A1B1: 4.8 oz. (136.078 grams)
Overall Dimensions DBSM-A1B1: 2.366 x 1.954 x 0.642 inches;
(without microphone) 60.096 x 49.632 x 16.307 mm
DBSMD-A1B1: 2.366 x 2.475 x 0.642 inches;
60.096 x 62.865 x 16.307 mm
Emission Designator DBSM-A1B1/DBSMD-A1B1: 170KG1E
Recorder
Storage media microSDHC memory card
File format .wav files (BWF)
A/D converter 24-bit
Sampling rate 48 kHz
Recording modes/Bit rate HD mono mode: 24 bit - 144 kbytes/s
Audio Performance
Frequency response 20Hz to 20kHz, +/- 1dB
Dynamic range 112 dB (A)
Distortion < 0.035%
Operating temperature range Celsius: -20 to 50
Fahrenheit: -5 to 122

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