Bext Radio Transmitters

  • Solid State                   

XT150                

  • Includes low pass/harmonic filter and can be used as a stand-alone transmitter
  • High output power capability in a compact size cabinet
  • Instant front panel programmability in 10 KHz increments
  • Soft-start from RF mute status
  • Adjustable power output from 0 to 150 W
  • Automatic power control maintaining the output at any preset level
  • Main parameters available also on rear terminal board for remote control
  • Available with optional built-in stereo generator
  • Meets or exceeds all FCC and CCIR requirements
  • High reliability provided by conservatively rated components
  • Modular layout with plug-in, easily replaceable circuits and parts
  • Remote On/Off and readings available on back panel connector
 
General  
Rated Output Power: 0 to 150 W
RF Output Connector / Impedance "N" type Female / 50 Ohm
Frequency Range: 87.5 MHz to 108 MHz
Frequency Programmability: direct from front panel in 10 KHz increments
Frequency Stability: better than 500 Hz
Modulation Type: direct carrier frequency modulation
Spurious & Harmonic Suppression: meets or exceeds all FCC and CCIR requirements
Asynchronous AM S/N Ratio: 70 dB below reference carrier with100% 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 0.1% measured with a 3.18 KHz square wave and a 15 KHz sine wave at 100% modulation (typical 0.05%)
AC Power Requirement: 95 to 260 V, 10%, 50-60 Hz, single phase
Available voltage selections: No voltage selector.
Power Consumption: approx 290 VA
Panel Size: 483 mm (19") W x 88 mm (3 1/2") H (3 standard rack spaces high)
Overall Depth: 340 mm (13 1/2")
Weight: 8 Kg (17 Lbs)
Ambient Temperature Range: 0 C to 45 C (32 F to 113 F)
Pre-emphasis: for FCC 75 microsec, for CCIR 50 microsec
Composite Operation  
Composite Inputs: four total, 1 XLR for L&R with optional built-in st. gen., 1 XLR for MPX and 2 for SCA
MPX Input: 1 unbalanced BNC connector
MPX Input Impedance: 10 KOhm or 50 Ohm
MPX Input Level: 3.5 V P-P (1.237 V RMS/3.64 dBm)
Composite FM S/N ratio: 80 dB below 75 KHz deviation at 400 Hz measured in a 30 Hz to 100 KHz bandwidth with 75 microsecond de-emphasis (RMS)
Composite Amplitude Response: 0.5 dB, 30 Hz to 53 KHz - ±0.2 dB, 53 KHz to 100 KHz
Composite Total Harmonic Distortion: <0.05%
Composite Intermodulation Distortion: 0.02% or less, measured with a 1 KHz and a 1.3 KHz tones, 1:1 ratio, at 100% modulation
Stereo Separation: > 50 dB (typical 60 dB )
Crosstalk: main to stereo subchannel and stereo subchannel to main >55 dB (60 dB typical)
SCA Inputs: 2 unbalanced BNC connectors
SCA Input Impedance: 10 Kohm
SCA Input Levels: 3.5 V P-P (1.237 V RMS/3.64 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
Cosstalk: 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 at 400 Hz measured in a 30 Hz to 20 KHz bandwidth with 75 microsecond 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) 2010 BEXT Corporation USA