3561A Dynamic Signal Analyzer

  • Spectrum analysis, 1/3 and 1/1 octave analysis
  • Time capture (40k sample)
  • High speed (7.5 kHz real time rate)
  • High accuracy, +/- 0.15 dB
  • 80 dB dynamic range, to 640 uHz resolution
  • Non-volatile memory option stores 127 measurements

The HP 3561A is a versatile real-time spectrum analyzer for analysis of electronic, acoustic, and vibration signals up to 100 kHz.  The patented design of the input provides outstanding measurement performance, +/- 0.15 dB amplitude accuracy, 80 dB dynamic range and 0.003% frequency accuracy.  The analyzer also has a built-in tracking generator for stimulus-response measurements.  With built-in waveform math, magnitude and phase measurements are possible.  Digital processing is used to provide ultra-narrow resolution bandwidths up to 640 uHz.  Digital processing also speeds up measurements; a measurement with 1 Hz resolution requires only a 1.5 second sweep.

In addition to spectrum measurements, the 3561A displays time waveforms similar to oscilloscope displays.  A 40k sample time buffer captures transients for examination in the time domain or analysis in the frequency domain.  The HP 3561A is also an excellent analyzer for acoustic testing.  It offers 1/3 and 1/1 octave measurements and an analog weighted filter.

SN 2735A04495

In G to VG condition, with  Operator Manual.  HP 3561A

SN 2549A03568

This one also in G to VG condition, and has memory option 001 installed, however the option 001 memory DOES NOT WORK.  With  Operator Manual.  HP 3561A /bad 001