Lectrosonics DBSM Digital Transcorder w/ Time Code, Single AA Battery

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The Lectrosonics DBSM-A1B1 and DBSMD-A1B1 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 lavalier 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 LCD, 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 housing is machined from solid aluminum blocks to provide an extremely lightweight and rugged package. A special non-corrosive finish resists salt water exposure and perspiration in extreme environments.

Frequency Tuning Range
RF-intense multichannel and mobile venues must have a broad selection of frequencies available to alleviate interference problems, especially with the emergence of DTV telecasts. Frequencies are selectable in 25 kHz steps across the broad tuning range of each frequency band.

Alternate Recording Function
Instead of transmitting, the transmitters may also be used as a stand alone recorder. The industry standard .wav (BWF) file format is compatible with essentially any audio or video editing software.

NOTE: The transmitting and recording functions cannot be used simultaneously. Users must choose to transmit or record.

Lectrosonics DBSM/DBSMD Digital Transcorder - Features:

• Selectable output power to maximize operating range or battery life
• Ultra-lightweight, corrosion resistant housing
• OLED interface with lockout option
• Servo Bias input circuitry
• IR (infrared) port for fast setup
• Alternate use as recorder on internal microSDHC memory card
• Time code jam-sync capability with TCXO for <1 ppm accuracy
• High density mode for ultra-tight channel spacing

• Operating Frequencies: Band A1-B1, 470.100 - 607.950
• Channel Spacing: 25 kHz
• RF Power Output: 2 (HDM only), 10, 25 or 50 mW
• Compatibility Modes: 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: .5 mV to 50 mV before limiting; >1 V with limiting
  • If set for electret lavaliere mic: 1.7 uA to 170 uA before limiting; >5000 uA (5 mA) with limiting
  • Line Level: 17 mV to 1.7 V before limiting; >50 V with limiting
• Input Impedance:
  • Dynamic Mic: 300 Ohms
  • Electret Lavalier: 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 lavalier
• Gain Control Range: -7 ti 44 dB; panel mounted membrane switches
• Modulation Indicators: Dual bi-color 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 lavalier 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:
    • 20 Hz to 20 kHz, ± 1 dB: Encrypted Digital Mode
    • 20Hz to 11.3 kHz, ± 3 dB: High Density (HD) Mode (CH)
  • Dynamic Range: 110 dB (A), before limiting
  • Distortion: < 0.035%
• Antenna: Flexible, unbreakable steel cable
• Battery: AA (+1.5 VDC), disposable, Lithium recommended
• Battery Life with AA:
  

  Model	Lithium	Alkaline	NiMH
  DBSM-A1B1 (1 AA):	2 mw - 8:55 10 mw - 7:25 25 mw - 9:35 50 mw - 4:45	2 mw - 2:15 10 mw - 2:00 25 mw - 1:25 50 mw - 1:10	2 mw - 5:25 10 mw - 4:55 25 mw - 4:25 50 mw - 4:20
  DBSMD-A1B1 (2 AA):	2 mw - 18:20 10 mw - 16:35 25 mw - 15:10 50 mw - 12:10	2 mw - 7:45 10 mw - 7:10 25 mw - 6:20 50 mw - 4:30	2 mw - 10:55 10 mw - 10:30 25 mw - 9:20 50 mw - 7:25

• 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
  • Input:
    • Type: Analog mic/line level compatible; servo bias preamp for 2V and 4V lavalier 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: 20 Hz to 20 kHz, ± 1 dB
    • Dynamic Range: 112 dB (A)
    • Distortion: < 0.035%
  • Available Recording Time: Using a microSDHC memory card, the approximate recording times are as follows. The actual time may vary slightly from the values listed in the tables.

    HD Mono Mode
    Size	Hrs:Min
    8GB	11:10
    16GB	23:00
    32GB	46:10

• Emission Designator: 170KG1E
• Operating Temperature Range: -5 to 122 °F | -20 to 50 °C
• Dimensions (w/o Microphone):
  • DBSM-A1B1: 2.366 x 1.954 x 0.642 in | 60 x 49.6 x 16.3 mm
  • DBSMD-A1B1: 2.366 x 2.475 x 0.642 in | 60 x 62.9 x 16.3 mm
• Weight w/ Battery(s):
  • DBSM-A1B1: 3.2 oz | 90.7 g
  • DBSMD-A1B1: 4.8 oz | 136 g