HP3586B selective level meter shown as HF receiver

This is the HP 3586B selective level meter. It covers 50Hz to 32MHz in 0.1 Hz steps. It is basically an HF receiver with a calibrated RF input level meter ("S" meter if you want) and super accurate frequency counter. It is built exceptionally well and works perfect. this particular one has the option installed to do C/N and phase jitter measurements on input signals. See the video for the details.