Tektronix 2712
This is a 9kHz to 1.8GHz spectrum analyser. It is a hybrid. It can switch between true analog or digital mode. It can store four traces, has markers and other very usefull functions.
The noise performance is very good. Down here is a picture of the 9th harmonic of it’s internal 100 MHz calibrator at 300Hz RBW.
9th harmonic and better as -120 dBm noisefloor.