AnsweredAssumed Answered

Increased Noise after 8.5 GHz for low power measurements on E5071C

Question asked by CMFSchneider on Feb 1, 2018
Latest reply on Mar 2, 2018 by CMFSchneider

We observe an increased noise for measurements above 8.5 GHz for low power measurements (clearly visible for measurements below -30 dBm, gets stronger for measurements at -80dBm)

 

Below is a measurement of a short stainless steel coaxial cable with the following parameters

  • Power: -40 dBm
  • Center 8.5 GHz
  • Span 6 GHz
  • IFBW 10 kHz
  • Points 1601
  • Full 2-Port Ecal using N4691

S21 measurement of a short stainless steel coaxial cable at -40 dBm. Center 8.5 GHz, Span 6 GHz, IFBW 10 kHz, Points 1601, Full 2-Port Ecal using N4691

 

Is this a normal behavior? What causes this? Are there possibilities to improve?

 

Best regards,

Christian

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