Lectrosonics Inc SSMA1 Manual De Usuario
Micro Body Pack Transmitter
Rio Rancho, NM
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:
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:
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:
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
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