Broadcast Electronics STXLP 1kW

1kW Low Power FM Transmitter

BE's STX LP is the first low power transmitter to effectively combine the quality, features and support you want at an exceptional value. As the most compact, featurerich 1kW FM Transmitter on the market, the 3 rack unit design includes an integrated exciter, backup controller, IP connectivity and more. 

With built-in features not found in competing models, BE saves you more than just the cost of additional external equipment. Smaller rack size, quicker installation and set-up times, reduced maintenance and future system expandability options puts you at a competitive advantage while ensuring overall system reliability. 

Designed to Last

Leveraging proven BE technology, the STXLP gives low power stations a boost with an enhanced PA design, increased redudancy and extreme flexibility. 

The truly scalable accommodates both current and future system configurations, including main/alternate, FM booster and N+ applications, ensuring your purchase today will meet your needs tomorrow. As your station's needs change, so can your transmitter, saving you money on costly system upgrades.

Standard plug-in stereo generator allows for AES and L/R inputs for even greater flexibility. The stereo generator also provides a 19kHz output for use with an RDS generator..

Key Features

• Standard integrated exciter
• External input for use with optional external exciter 
• Scalable design allows 1kW, 3kW and 5kW configuration 
• Front panel control and metering via LCD interface 
• Redudant fan design for extended system reliability 
• IP Connectivity for anytime, anywhere access 
• Internal low pass filter
• Built-in emergency backup controller for on-air redudancy 
• Composite input with 2 SCA ports and 1 RDS port 
• Stereo generator for additional input options
• Designed for reliability and serviceability 
• Quick and easy setup to get you on the air faster 

STXLP 1kW Technical Specifications

RF Specs

• Output Power:
  • • Range: 
      • • FM: 250 - 1100W
        • FM+HD (with external exciter): 175-700W (-20dB); 110-450W (-10dB)
        • HD Only (with external exciter): 75-330W
    • Accuracy:±5%
    • Resolution: 1W
• Efficiency: 64% typical
• VSWR: Rated power into 1.5:1
• Output Impedance: 50Ω nominal
• Frequency:
  
  • • Range: 87.5MHz to 108MHz, programmable in 10kHz steps
    • Stability: ±150Hz, -10° to +50° C
• RF Harmonics Suppresion: Suppresion meets all FCC/IC/ETSI requirements 
• Modulation:
  
  • • Type: Direct-to-channel; FM (FM+HD or HD only with external exciter) 
    • Capabilities: 300kHz 
• Regulatory: Meets all FCC/IC/CE and IEC 215 safety requirements 

FM Audio Specifications with Internal Exciter

• Composite:
  • • Connector Type: BNC un-balanced 
    • Input Level: 3.5V p-p nominal for 75kHz deviation
    • Impedance: 10kΩ 
    • Amplitude Response: ±0.03dB, 30Hz to 53kHz; ±0.25%, 53kHz to 100kHz 
    • Total Harmonic Distortion + Noise: 0.1%, 20Hz to 53kHz; 0.15%, 53kHz to 100kHz
    • Intermod Dist: 0.13%, SMPTE (60/7000Hz, 1:1 ratio) 
    • S/N Ratio: 80dB below 100% modulation @ 400Hz 
    • Asynchronous AM S/N Ratio: Better than 53dB (typical 60dB) below referenced to 100% peak AM modulation
    • Synchronous AM S/N Ratio: Better than 53dB (typical 60dB) below referenced to 100% peak AM modulation; 75 usec de-emphasis with 75kHz deviation @ 400Hz sine wave 
• SCA1 & SCA2:
  
  • • External:
      • • Connector Type: BNC un-balanced (2)
        • Input Level: 3.5V p-p nominal for 10% injection level
        • Impedance: 10kΩ 
        • Frequency Response: ±0.5dB; 53kHz to 100kHz 
• RDS:
  
  • • External:
      • • Connector Type: BNC un-balanced 
        • Input Level: 3.5V p-p nominal for 10% injection level 
        • Impedance: 10kΩ 
        • Frequency Response: ±0.5dB; 53kHz to 100kHz 
• Pilot Stability: ±0.3Hz, 0°C to 50°C

FM Audio Specifications (Internal Exciter & Optional Stereo Generator)

• Modes: Stereo, Mono (L+R), Mono L, Mono R
• Stereo: 
  
  • • Connector Type:
      • • AES: XLR
        • L&R: XLR
    • Input Level:
      
      • • AES: -2dBFS for 100% modulation
        • L&R: +10dBm for 100% modulation into 600Ω 
    • Impedance:
      
      • • AES: 110Ω balanced 
        • L&R: 600Ω or 10kΩ selectable; balanced 
    • Amplitude Response: 
      
      • • AES:±0.5dB, 30Hz to 15kHz 
        • L&R: ±0.5dB, 30Hz to 15kHz 
    • THD + Noise: 
      
      • • AES: 0.1% or better 
        • L&R: 0.1% or better 
    • Intermod Dist: 
      
      • • AES: 0.1% or better 
        • L&R: 0.1% or better 
    • S/N Ratio:
      
      • • AES: 75dB below 100% modulation @ 400Hz 
        • L&R: 75dB below 100% modulation @ 400Hz 
    • Separation:
      
      • • AES: -50dBr 30Hz to 15kHz 
        • L&R: -50dBr 30Hz to 15kHz 
    • Preemphasis: 50us, 75us, none 
    • RDS:
      
      • • 19kHz Output:
          • • Connector: BNC Un-balanced 
            • Impedance: 4.7kΩ min load 
            • Level: 1 vp-p 

Environmental

• Temperature: -10° to +50°C
• Altitude: 10,000 ft (3,048M)
• Humidity: 95% Non-Condensing

Electrical

• AC Input Voltage: 180-260 VAC, 47-63Hz (Single-Phase) 
• Disconnect Size: 20A 
• AC Wire Size: #12 Copper AWG, Type THHN  
• Current Draw: 8.5 A Typical (Measured at 208 VAC, 1kW output) 
• Power Consumption: 1.75kW (calculated) 
• Cooling Air Requirements: 200 CFM (5.7 M3/min)
• Heat Dissipation: 750W at 1kW RF Output into 50Ω load 
• BTU: 2560 BTU/H at 1kW RF Output into 50Ω load 
• Power Factor: 0.98 at full load 
• Surge Protection: Suitable Surge Arrestor Required