The Lectrosonics DBSMD digital transcorder was 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 DBSMD uses the same accessories as the SMDWB transmitter, specifically belt clips, pouches, and battery eliminators.
Specifications
|
Operating frequencies:
|
DBSM(D)-A1B1: Band A1-B1: 470.100 - 607.950
DBSMD(D)/E01-A1B1: Band A1-B1: 470.100 - 614.375
NOTE: It’s the user’s responsibility to select the approved
frequencies for the region where the transmitter is operating
|
|
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
|
|
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:
(without microphone)
|
DBSM-A1B1: 2.366 x 1.954 x 0.642 inches;
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
|
|
|
|
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 50 |
Fahrenheit:
|
-5 to 122 |
