Scanning receivers
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Scanning receivers

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basic principles of a scanning receivers

basic principles of a scanning receivers

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Scanning receivers Scanning receivers Presentation Transcript

  • Scanning receivers Sagax Communications, Ltd. Haller u. 11-13. Budapest 1096 Hungary www.sagax.hu
  • 0MHz Tuned center = 20MHz 3000MHz Tuned center = 2980MHz
  • 20MHz
  • 20MHz
  • 20MHz 1ms 100ms 10hps/sec FH signal
  • 20MHz 50us 1ms
  • Traditional receiver structure LNA MIX1 WB IF BPF MIX2 NB IF BPF DET ADC SPECTRUM ESTIMATION RF IN LO1 LO2
  • Digital receiver structure LNA MIX1 WB IF BPF ADC Digital Signal Processor SPECTRUM ESTIMATION RF IN LO1
  • Search or band scanning A 40 80 120 160 200 240 280 320 360 400 440 F
  • Random or memory scanning A 40 80 120 160 200 240 280 320 360 400 440 F
  • Tuned receiver implementation Analog Receiver tuning A 40 80 120 160 200 240 280 Scanning Bandwidth 320 360 400 440 F Scanning Resolution A 40 80 120 160 200 240 280 Spectrum estimation 320 360 400 440 F
  • Digital receiver implementation Analog Receiver tuning A 40 80 120 160 200 240 280 320 360 400 440 F FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT FFT Scanning Bandwidth Scanning Resolution A 40 80 120 160 200 240 280 Spectrum estimation 320 360 400 440 F
  • Memory scanning with digital receiver A 40 80 120 160 200 240 280 320 360 400 440 F
  • 1. General test setup GEN#1 SUM RF SPLIT IF TUNER GEN#2 RF Input IF Output IF Digital Receiver Device UnderTest (DUT) DET Oscilloscope