Bext Radio Transmitters

  • Solid State                   

CDXE & CDXD                

  • New generation, totally transparent Digital Encoders / Decoders for STLs

  • 2 audio channels (CDXE2 & CDXD2) or 4 audio channels (CDXE4 & CDXD4), 20 Hz to 15 kHz each

  • One Auxiliary Data Channel (2 channel models)/ Two Auxiliary Data Channels (4 channel models)

  • Highest digital audio quality is preserved even through multiple hops

  • Very high immunity to noise compared to an analog link

  • Very high immunity to interference of adjacent channels

  • Automatic muting in case of sync loss

  • Audio levels readings on LED bars and Status indicators on front panel

  • Dual independent coded signal outputs on Encoder

  • Additional output on Decoder with a regenerated digital signal for multiple hops without degradation
 
MODEL DESIGNATION  
CDXE2: 2 Channel Encoder
CDXD2: 2 Channel Decoder
CDXE4: 4 Channel Encoder
CDXD4: 4 Channel Decoder
GENERAL SYSTEM SPECIFICATIONS  
Audio Performance: 20 Hz - 15 kHz audio, 2 or 4 channels
System total delay: not exceeding 4 microseconds
Audio coding method: Sub-band Adaptive Differential Pulse Code Modulation
Channel Coding: 3 Levels Shaped Pulse Amplitude Modulation
Sampling Frequency: 32 kHz
Dynamic Range: > 90 dB
Total Harmonic Distortion: 0.05 % at 1 kHz
Signal to Noise Ratio: 80 dB
CDXE ENCODERS  
Analog audio input connectors: XLR female, 600 ohm balanced or unbalanced (switchable)
Analog audio input level: -10 dBu to + 10 dBu, adjustable
Digitally coded output connector: BNC, unbalanced
Digitally coded output signal level: 2.2 V p-p
Bit Rate: 256 Kbit/s (2 channel models) / 512 Kbit/s (4 channel models)
Data Port: 2,400 baud, RS 232, DB 9 female
Indicators: Analog audio levels, Voltages, Fault, Data
Power requirements: 100/120/220/240 VAC, 50/60 Hz, approx. 15 W
Front Panel Size: 483 mm x 44 mm (19" x 1 3/4") (1 standard rack space high)
Overall depth: 372 mm (14 3/4")
Net weight: approx 7 Kg (15.5 lbs)
CDXD DECODER  
Analog audio output connectors: XLR male, 100 ohm balanced or unbalanced (switchable)
Analog audio output level: -10 dBu to + 10 dBu, adjustable
Digitally coded input connector: BNC, unbalanced
Digitally coded input signal level: 2.2 V p-p
Regenerated coded signal connector (for multiple hops): BNC, unbalanced
Regenerated coded signal level (for multiple hops): 2.2 V p-p
Data Port: 2, 400 baud, RS 232, DB 9 male
Indicators: Analog audio levels, voltages, Fault, Data, Sync Error
Power requirements: 100 / 120 / 220 / 240 VAC, 50 / 60 Hz, approx 15 W
Front panel size: 483 mm x 44 mm (19" x 1 3/4") (1 standard rack space high)
Overall depth: 372 mm (14 3/4")
Net weight: approx 7 Kg (15.5 lbs)
STL TRANSMITTER & RECEIVER REQUIREMENTS  
Deviation: 38 kHz (2 channel models) / 53 kHz (4 channel models)
Bandwidth at -3 dB: 250 kHz (2 channels models) / 450 kHz (4 channel models)
Total group delay variation: less than or equal to 0.5 microseconds

 

(c) 2004 BEXT Corporation USA