[G0HZU_JMR]

To show that the 50Hz sidebands are not in the analyser, see the plot of my Marconi 2024 sig gen. There are no visible 50Hz sidebands although they are there at about -110dBc if I increase the range of the vertical scale.

The plot also shows how clean the (synthesised) Mi 2024 sig gen is and also how clean the spectrum analyser is when in this sub 40MHz SSA mode. Suddenly, even the MMIC trainer oscillator looks noisy in comparison! However, this Mi 2024 sig gen has the exotic high spec OCXO reference in it and it has very low close to carrier phase noise and this sets it apart from other Mi 2024 sig gens with the standard ref oscillator. I'm not sure if a regular 2024 sig gen would look this clean on a 100Hz span.