Lectrosonics DSSM Miniature Water-Resistant Digital Transmitter
- IP57 water-resistant digital micro transmitter
- 10, 25, or 50 mW, plus a 4 mW high-density mode
- Rechargeable LB-50 battery with optional dock charging
From $2,449.00 USD
Lectrosonics DSSM Miniature Water-Resistant Digital Transmitter
Rated IP57, the Lectrosonics DSSM miniature water-resistant digital transmitter hides in costuming for theater, TV, film, and broadcast work.
It is the fully digital successor to the SSM. IP57 means it is protected against dust and survives immersion to 1 meter for more than 30 minutes, and its LB-50 battery still swaps out quickly.
Frequency Bands
Trew Audio carries three versions: A1B1 (470.100 to 607.950 MHz), B1C1 (537.600 to 607.950, 614.050 to 615.950, and 653.050 to 662.950 MHz), and 941 (941.600 to 959.750 MHz, in three segments). Frequencies step in 25 kHz increments, for more than 6000 in all, and the B1C1 version is limited to 20 mW in its two upper segments.
Power and Charging
RF power is 10, 25, or 50 mW in D2 mode, and the high-density (HDM) mode runs at 4 mW to fit the most channels into limited spectrum. The LB-50 runs it for 4.5 hours at 50 mW and up to 6.75 hours in HDM mode. The optional CHSDSSM dock charges four DSSMs or LB-50 batteries at a time, and docks chain together to charge 16.
Input and Controls
The locking subminiature 3-pin input, with a threaded collar, takes mic or line signals, and gain runs from -7 to +44 dB in 1 dB steps. The preamp’s limiter handles peaks more than 30 dB over full modulation. An OLED display and membrane switches reach every setting, and the IR port next to the antenna transfers frequency, mode, and encryption keys.
Build
The housing is machined aluminum alloy with a hard, conductive electroless nickel finish (ebENi), and a repositionable wire belt clip points the antenna up or down. It is slightly larger and heavier than the SSM, with more rounded corners, and a USB connector inside the battery compartment takes firmware updates.
Compatibility
Audio is encrypted with AES 256 in CTR mode, with four key policies, and the DSSM works with current Lectrosonics digital receivers, including the DSQD, DCR822, DSR, DSR4, M2Ra, and DCHR.
Features
- IP57 rated: dustproof and immersible to 1 meter
- Selectable 10, 25, or 50 mW in D2 mode
- High-density mode at 4 mW for more channels
- More than 6000 frequencies across a wide UHF range
- AES 256-CTR encryption
- Two-way IR port for setup
- Gain from -7 to +44 dB in 1 dB steps
- Firmware updates over USB with Wireless Designer
- Rechargeable LB-50 lithium-ion battery
- Dock charging with the optional CHSDSSM
Available Options
| Band | Model | Antennas Included |
|---|---|---|
| A1B1 (470 to 608 MHz) | DSSM-A1B1 | AMM19 and AMM22 |
| B1C1 (537 to 663 MHz) | DSSM-B1C1 | AMM22 and AMM25 |
| 941 (941 to 960 MHz) | DSSM/E07-941 | AMM944 |
What's Included
- Whip antennas with SMA connectors for the version (A1B1: AMM19 and AMM22; B1C1: AMM22 and AMM25; 941: AMM944)
- 35939 pouch
- LB-50 lithium-ion battery (40106-1)
- 27332-1 wire belt clip
Specifications
| Transmitter | |
|---|---|
| Operating Frequencies | A1B1: 470.100 to 607.950 MHz B1C1: 537.600 to 607.950, 614.050 to 615.950, and 653.050 to 662.950 MHz 941: 941.600 to 951.900, 953.100 to 956.150, and 956.550 to 959.750 MHz |
| Frequency Selection Steps | 25 kHz |
| RF Power Output | 10, 25, or 50 mW (D2 mode); 4 mW (HDM mode) 20 mW max for B1C1 from 614.050 to 615.950 and 653.050 to 662.950 MHz |
| Encryption | AES 256-CTR (FIPS 197 and FIPS 140-2) |
| Compatibility Modes | HDM or D2 |
| Frequency Stability | ±0.002% |
| Equivalent Input Noise | −120 dBV, A-weighted |
| Input Level | Nominal 2 mV to 300 mV before limiting Greater than 1 V with limiting |
| Input Impedance | Mic: 300 or 4.5 k ohms, selectable Line: 900 ohms Instrument: 1 M ohm |
| Input Limiter | DSP-controlled dual envelope soft limiter, greater than 30 dB range |
| Gain Control Range | −7 to +44 dB in 1 dB steps |
| Audio Input | Locking subminiature 3-pin |
| Antenna | SMA connector; coated flexible wire, length by band |
| Audio | |
| Frequency Response | 35 Hz to 20 kHz 35 Hz to 15 kHz (HDM mode) |
| Low-Frequency Roll-Off | Selectable, 35, 50, 70, 100, 120, or 150 Hz |
| THD | 0.2% typical |
| Power and Physical | |
| Battery | LB-50 lithium-ion, 3.6 V, 1000 mAh (included) |
| Battery Life | 50 mW: 4.5 h 25 mW: 5 h 10 mW: 6 h HDM (4 mW): 6.75 h |
| Weight | 100 g (3.5 oz) with battery |
| Dimensions (Housing) | 66 × 49 × 17 mm 2.59 × 1.9 × 0.70 in |
| Latest Specifications | Specifications are subject to change without prior notice. For current information, visit lectrosonics.com. |
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