Here is a chance to have a real spectrum analyzer, not limited in dynamic range or view bandwidth (VBW). True sinewave testing audio to microwave.
The precision reference level output is excellent for testing attenuators, etc. And no fussy SMA connectors. Still sell in the $600-900 range commercially. Se me at my table or via hamve6kk at gmail.com. Details below.

HP 8594E Spectrum Analyzer 9 kHz to 2.9 GHz (50 Ohms)
Passes all self tests. Far superior to miniSA with true sinewave testing on all frequencies and wide 70 dB dynamic range.
Amplitude range -127 to +30dBm. DANL (noisefloor) less than -127 dBm at 30 Hz RBW.
Direct key or dial entry of frequency, span, amplitude. Observe nearby signals with RBW down to 30Hz. -70dBc distortion, +-1.5 dB absolute accuracy yet agrees with new spec/an within 1 dBm. High safe input at +30 dBm. Superior specs compared t0 Rigol or Siglent at over $2000. No tracking generator or handles. 10 MHz external reference input and output. Has a 300 MHz -20 dBm cal output, great for checking attenuators. Marker counter, peak find, hold, track. A real lab grade analyzer. Asking $725