Lectrosonics Inc SSMB1 Manuel D’Utilisation

13

Specifications

Operating Frequencies: 

  Band A1:  470.100 - 537.575 

  Band B1:  537.600 - 614.375 

  Band C1:  614.400 - 691.175 

  Band D1:  691.200 - 767.975 (export only)
Frequency Selection Steps: 

Selectable; 100 kHz or 25 kHz

RF Power output: 

Selectable; 25 or 50 mW

Pilot tone: 

25 to 32 kHz; 5 kHz deviation 

 

 

(Digital Hybrid mode)

Frequency Stability: 

± 0.002%

Deviation: 

± 75 kHz max. (Digital Hybrid mode)

Spurious radiation: 

60 dB below carrier

Equivalent input noise: 

–120 dBV (A-weighted)

Input level: 

Nominal 2 mV to 300 mV, before limiting 

 

 

Greater than 1V maximum, with limiting. 

Input impedance:

•  Mic: 300 or 4.5 k ohm; selectable 

•  Line: greater than 100 k ohm

Input limiter: 

DSP controlled, dual envelope “soft” limiter 

 

 

with greater than 30 dB range

Gain control range: 

44 dB; digital control

Modulation indicators: 

Dual bicolor LEDs indicate modulation of  

 

 

-20, -10, 0 and +10 dB referenced to full  

  

modulation

Audio Performance (Digital Hybrid mode)
Frequency Response: 

70 Hz to 20 kHz (+/-1dB) 

Low frequency roll-off: 

–12 dB/octave; 70 Hz

THD:  0.2% (typical)
SNR at receiver output:

Note: The dual envelope “soft” 

limiter provides exceptionally good  

handling of transients using variable  

attack and release time constants. Once activated, the limiter compresses 

30+ dB of transmitter input range into 4.5 dB of receiver output range, thus 

reducing the measured figure for SNR without limiting by 4.5 dB

SmartNR 

No Limiting  w/Limiting

OFF  103.5 108.0
NORMAL 107.0 

111.5

FULL 108.5 113.0

Controls: 

Side panel membrane switches with LCD 

   

interface for power on/off and all setup and 

   

configuration controls

Audio Input Jack: 

LEMO 00 Series 3-pin

Antenna: 

Galvanized steel, flexible  wire

Battery: 

Lithium-ion 3.7 V rechargeable

Battery Life: 

4 hours per charge

Weight: 

2.3 ounces (65.2 grams) including lithium battery

Dimensions (housing): 

2.3 x 1.5  x .56 in. (58.4 x 38 x 14.2 mm)

Emission Designator: 

180KF3E