For example: Agilent E4440A or Anritsu 68369
20Hz - 40GHz Spectrum Analyzer

Model:FSEK30-B4-B5-B7-B15-B17-B23

Manufactured by: Rohde and Schwarz

Category:Spectrum Analyzers

Rohde and Schwarz FSEK30-B4-B5-B7-B15-B17-B23 Options

B4   - Low Phase Noise
B5   - FFT-Bandwidth 1Hz-1KHz
B7   - Vector Signal Analyzer
B15 - Computer Function Capability w/mouse and keyboard.
B17 - 2ND IEC/IEEE BUS INTFACE
B23 - Broadband Output 741.4 MHz

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