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.

Accessories

Features

• Encrypted with AES 256 bit CTR, offering four key policies
• 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
• Simultaneous record and transmit feature for models sold outside the USA.
• Selectable output power to maximize operating range or battery life
• IR (infrared) port for fast setup
• Integrated recorder on internal microSDHC memory card
• Timecode jam-sync capability with TCXO for <1 ppm accuracy

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.

Recording Function

The record and transmit function can be used simultaneously (only in regions outside the United States). For US models, when the unit is transmitting and recording is turned on, the audio in the RF transmission will stop, but the battery status will still be sent to the receiver. The transmitters can be jammed with timecode sync for eachaudio file alignment during post production and uses atemperature compensated crystal (TCXO) for <1 PPM accuracy. and transmitting simultaneously.

Specifications

• Band A1-B1: 470.100 - 607.950
• Band B1-C1: 537.600 - 691.175
• DBSM-A1B1 (1 AA): 10 mw - 7:25 10 mw - 2:00 10 mw - 4:55
• DBSMD-A1B1 (2 AA): 10 mw - 16:35 10 mw - 7:10 10 mw - 10:30
• Channel Spacing: 25 kHz Weight w/ battery(s):
• DBSM: 2 (HDM only), 10, 25 or 50 mW
• DBSM-A1B1: 3.2 oz. (90.719 grams)
• DBSMD: 2 (HDM only), 10, 25 or 50 mW
• DBSMD-A1B1: 4.8 oz. (136.078 grams)
• DBSM(D)/E01-A1B1: 2 (HDM only), 10, 25 or 50 mW
• DBSMD(D)/E01-B1C1: 2 (HDM only),10, 25 or 50mW (without microphone) 60.096 x 49.632 x 16.307 mm
• DBSM/E09-A1B1: 2 (HDM only), 10, 25 mW
• DBSMD/E09-A1B1: 2 (HDM only), 10, 25 mW 60.096 x 62.865 x 16.307 mm
• DBSM-A1B1/DBSMD-A1B1: 170KG1E (D2
• DBSM/DBSMD: D2 digital with encryption, mode)
• Modulation Type: 8 PSK mode)
• Encryption Type: AES-256 in CTR mode
• Frequency stability: ± 0.002% Recorder
• Spurious radiation: Compliant with ETSI EN 300 422-1
• Storage media: microSDHC memory card
• Equivalent input noise: –125 dBV, A-weighted
• File format: .wav files (BWF)
• A/D converter: 24-bit
• If set for dynamic mic: 0.5 mV to 50 mV before limiting
• Sampling rate: 48 kHz
• If set for electret lavaliere mic: 1.7 uA to 170 uA before limiting • HD mono mode: 24 bit - 144 kbytes/s
• Line level input: 17 mV to 1.7 V before limiting Input
• Type: Analog mic/line level compatible;
• Input impedance: servo bias preamp for 2V and 4V lavaliere
• Dynamic mic: 300 Ohms microphones
• Electret lavaliere: Input is virtual ground with servo adjusted
• Input level: • Dynamic mic: 0.5 mV to 50 mV
• Line level: 2.7 k ohms • Line level: 17 mV to 1.7 V
• Input limiter: Soft limiter, 30 dB range
• Input connector: TA5M 5-pin male
• Bias voltages: Fixed 5 V at up to 5 mA Audio Performance
• Frequency response: 20Hz to 20kHz, +/- 1dB:
• Gain control range: -7 to 44 dB; panel mounted membrane switches
• Dynamic range: 112 dB (A)
• Modulation indicators: Dual bicolor LEDs indicate modulation