Bext Radio Transmitters

  • Solid State                   

XL500                

  • Up to 500 W of FM Power from a lightweight, ultra compact, 3 rack space unit
  • All functions including frequency reassignment can be remotely supervised & controlled by PC via Modem   
  • No proprietary software necessary to connect using any PC: can be supervised by Microsoft HyperTerminal   
  • Include low pass/harmonic filter and can be used as a stand-alone transmitter   
  • Modular architecture allows configuring unit for diverse applications   
  • Optional cards include: Stereo Generator, RDS Generator, Audio Limiter   
  • Cool running & high efficiency through advanced power supply design & proprietary RF Mosfet circuitry   
  • Convenient large LCD Display; frequency & all parameters settable through front panel menu or remotely   
  • Soft-start from RF mute status and automatic power control maintaining the output at any preset level   
  • Main parameters available also on rear terminal board for remote control   
  • Proportionate Auto-foldback allows uninterrupted operation even in case of high VSWR   
  • Meets or exceeds all FCC and CCIR requirements
 
General  
Rated Ouput Power: 5 to 500 W
RF Output Connector / Impedance: "N" type Female; 50 Ohm
Frequency Range: 87.5 MHz to 108 MHz
Frequency Progammability: direct from front panel in 10 KHz steps
Type of Modulation: FM direct carrier modulation at final frequency
Frequency Stability: better than ±100 Hz
Spurious & Harmonic Suppression: meets or exceeds all FCC and CCIR requirments
Asynchronous AM S/N Ratio: 65 dB below reference carrier with 100% amplitude modulation at 400 Hz, without de-emphasis, no FM modulation present
Synchronous AM S/N Ratio: 55 dB or better below reference carrier with 100% amplitude modulation at 400 Hz, without de-emphasis, FM modulation = ±75 KHz at 400 Hz
Transient Intermodulation Distortion: less than 0.05% measured with a 1 KHz sine wave and a 1.3 KHz sine wave, ratio 1:1, 100% modulation
AC Power Requirement: 117 or 230 V, ±10%, 50 - 60 Hz, single phase
Approximate Power Consumption: 900W at full power
Panel Size: 483 mm (19") W x 123 mm (5 1/4") H (3 standard rack spaces high)
Overall Depth: 495 mm (19 1/2")
Weigth: 16 Kg ( 35 Lbs)
Ambient Temperature: 0º C to 45º C (32º F to 113º F)
Pre-emphasis: for FCC 75 microsec, for CCIR 50 microsec
Composite Operation  
Composite Inputs: 1 BNC for MPX; SLR for L & R with optional stereo generator card
MPX Input Impedance: 10 KOhm unbalanced
MPX Input Level: 3.5 V p-p (1.237 V RMS / 4.1 dBm), adjustable -12 dB / +12 dB
L & R Inputs on St. Gen. Card: XLR, 10 KOhm unbalanced / 600 Ohm balanced (switchable)
Composite FM S/N ratio: > 78 dB below ±75 KHz deviation at 400 Hz measured in a 30 Hz to 100 KHz bandwidth with 75 microsec de-emphasis (RMS)
Composite Amplitude Response: ±0.8 dB, 30 Hz to 100 KHz
Composite Total Harmonic Distortion: < 0.05%
Composite Intermodulation Distortion: 0.05% or less, measured with a 1 KHz and a 1.3 KHz tones, 1:1 ratio, at 100% modulation
Stereo Separation: > 65 dB, typical 72 dB
Crosstalk: main to stereo subchannel and stereo subchannel to main >55 dB (60 dB typical)
SCA Inputs / SCA Impedance: 2 unbalanced BNC connectors / 10 KOhm
SCA Input Levels: 3.5 V P-P (1.237 V RMS / 4.1 dBm) for ±7.5 KHz deviation
SCA Amplitude Response: ±0.8 dB, 40 KHz to 100 KHz
Crosstalk: 67 KHz SCA to main or to stereo subchannel > 65 dB
Crosstalk: 92 KHz SCA to main or to stereo subchannel > 70 dB
Monaural Operation  
Audio Input Impedance: 600 Ohm balanced or unbalanced; 50 dB common mode suppression
Audio Input Level: 0 dBm (775 mV RMS / 2.2 V P-P) for ±75 KHz, adjustable
FM S/N Ratio: > 70 dB below ±75 KHz deviation @ 400 Hz measured in a 30 Hz to 20 KHz bandwidth with 75 microsec de-emphasis (RMS)
Audio Frequency Response: ±0.8 dB, 30 Hz to 15 KHz
Total Harmonic Distortion: < 0.1% (0.05% typical)
Intermodulation Distortion: 0.05% or less, measured with 1 KHz & 1.3 KHz tones, 1:1 ratio, at 100% modulation

 

(c) 2004 BEXT Corporation USA