Описание:
Beltpack Transmitter with Digital Hybrid Wireless™ Technology
Power output: SMB: 50mW
256 synthesized UHF frequencies
Wide input dynamic range
Channel Spacing: 100 kHz
Type of Modulation: FM
Frequency selection: Control panel mounted membrane switches
RF Power output: E01: 50 mW (nominal)
E02: 10 mW
Compatibility Modes: E01: Digital Hybrid Wireless® and IFB
E02: Digital Hybrid Wireless®, Mode 3, and IFB
Pilot tone: 25 to 32 kHz; 3 kHz deviation in hybrid mode
Frequency stability: ± 0.002%
Deviation: ± 50 kHz max. in hybrid mode
Spurious radiation: Compliant 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: 40 dB; panel mounted membrane switches
full modulation.
Line in
Mic in 150 Hz
Roll-off
Mic in 35 Hz
Roll-off
Audio Frequency Response: 35 Hz to 20 kHz, +/-1 dB (The low frequency
roll-off is adjustable - see graph above)
Signal to Noise Ratio (dB):
(overall system, 400 Series mode) SmartNR No Limiting w/ Limiting
OFF 103.5 108.0
NORMAL 107.0 111.5
FULL 108.5 113.0
(Note: the dual envelope “soft”
limiter provides exceptionally
good handling of transients
using variable attack and release
time constants. The gradual onset of limiting in the design begins below full modulation,
which reduces the measured figure for SNR without limiting by 4.5 dB)