Features

• Continuously variable IF input frequency, 10 to 200 MHz
• Operates from video or IF output
• Accurate, rapid, portable test set for measuring receiver sensitivity
• Direct digital readout of noise figure in dB
• LED indicators alert operator of improper gain or excess noise settings
• Linear output for X-Y plotter

Applications

• Receiving system check-out (RF through video)
• On-line performance monitoring
• Preamplifier and TWT evaluation
• Rapid verification of large ECM and communications receiving systems

Specifications

• Receiving System RF Range: 10KHz to 40 GHz, depending on noise source
• Noise Source Drive Voltage: +22V standard
• Noise Figure Measuring Range: 2 to 32 dB
• Indicators:
  * Input too high
  * Input too low
  * Excess noise selected too high
  * Excess noise selected too low

Input Requirements

• Video: Band-limited noise, representative of the envelope of the IF signal to within ±1 dB over a 12 dB minimum dynamic range with an RMS voltage adjustable to 100 mV minimum, and with frequency components higher than 3 kHz
• IF: Linear, nonsaturating, band-limited noise
  Frequency: 10 to 200 MHz
  Sensitivity: -50 dBm minimum
  AGC Range: 40 dB