Lectrosonics DBSMD-A1B1 DIGITAL TX W/RECORDER, TIME CODE, DUAL AA, 470-608 MHz

Lectrosonics DBSMD-A1B1 DIGITAL TX W/RECORDER, TIME CODE, DUAL AA, 470-608 MHz

The Lectrosonics DBSM and DBSMD digital transmitters are purpose-built for the demanding requirements of film and television production. They feature timecode jam synchronization, hands-free setup and adjustment through audible tones, and a sleep mode that helps conserve battery life while the transmitter is concealed in a costume during setup. The transmitter can then be awakened for normal operation once production begins. Audio input gain can be adjusted in 1 dB increments across a 44 dB range, while the selectable low-frequency roll-off provides 3 dB down points at 20, 35, 50, 70, 100, 120, and 150 Hz. This gives sound professionals precise control over subsonic and very low-frequency content. RF output power is selectable between 10, 25, and 50 mW, with a special 2 mW High-Density Mode (HDM) available for extremely tight channel spacing and simplified frequency coordination.

The audio input uses Lectrosonics' proprietary servo-bias circuitry with a standard TA5M connector, accommodating electret lavalier and dynamic microphones as well as line-level sources. A DSP-controlled analog limiter positioned ahead of the first microphone preamp provides more than 30 dB of overload protection, helping prevent distortion throughout the audio chain. Its dual-release design maintains natural-sounding audio while preserving both short transients and longer peaks with minimal distortion. A water-resistant control panel combines an OLED display, membrane switches, and multicolor LEDs for fast and precise adjustment of input gain, operating frequency, and compatibility modes. The transmitter is powered by standard AA batteries, with lithium batteries recommended for extended performance. The DBSM and DBSMD are also compatible with the same accessories used by the SMWB and SMDWB transmitters, including belt clips, pouches, and battery eliminators.

KEY 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 <1ppm accuracy
• High density mode for ultra-tight channel spacing
• Simultaneous record and transmit feature for models sold outside the USA.

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
DBSM(D)/E01-A1B1: 2 (HDM only), 10, 25 or 50 mW
DBSMD(D)/E01-B1C1: 2 (HDM only),10, 25 or 50mW
DBSM/E09-A1B1: 2 (HDM only), 10, 25 mW
DBSMD/E09-A1B1: 2 (HDM only), 10, 25 mW
Compatibility Modes: DBSM/DBSMD: D2 digital with encryption,
 and HDM high density digital with encryption
Modulation Type: 8 PSK
Encryption Type: AES-256 in CTR mode
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 (D2
mode)
DBSM-A1B1/DBSMD-A1B1: 110KG1E (HD
mode)
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 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:

Dynamic range: 112 dB (A)
Distortion: < 0.035%
Operating temperature range
Celsius: -20 to 40
Fahrenheit: -5 to 104