Advantest
R4131B

The Advantest R 4131 B is a small, portable Spectrum Analyzer operating within the frequency range of 10kHz to 3.5GHz.

• Center frequency is displayed on the CRT with a max. resolution of 1 kHz.
  
• Frequency span is 50 kHz to 3.5 GHz in 10 divisions on the horizontal scale of the CRT, selectable in 1-2-5 steps. With zero span, the set operates as fixed tuned receiver.
  
• Noise sideband is -80 dBc max. at resolution bandwidth of 1 kHz.
  
• Resolution bandwidth (3 dB points) is 1 kHz to 1 MHz in 1-3 steps.
  
• Marker display can be set at any point.
  
• Resolution max. 1 kHz (depends on the span).
  
• Screen display range in LOG mode: with respect to the reference level 80 dB for a 10 dB/div display and 20 dB for a 2 dB/div display.
  
• Reference level in LOG mode -69 dBm to +40 dBm; in LIN mode 72.77 µV to 22.36 V; reference level units: selectable as dBm, dBµ, or dBµ/m.
  When dBµ/m is selected, an automatic correction is made for the antenna calibration factor.
  
• Dynamic range, average noise level: -116 dBm.