"Salvador Ferrairo" wrote in message
...
Hi I am using a HP8592B to do RF measurements and the marker, after a
passed auto calibration, could be out 100 or 150 khz when measuring
signals over the 300Mhz range.

This spectrum analiser is a non synthetised VCO type, and I don't quite
know what frecuency measurement precision can be expected from it.

- Any experience on the marker frecuency precision on that type of
spectrum analiser?

Looking in a 1991 HP catalog, I see that you can expect a readout accuracy
of no better than 0.01% of center freqency + 2% of freqency span + 5 x N MHz
(this appears to be a term for the timebase accuracy). Keep in mind that
many spectrum analyzers are not precision measurement instruments.

-NM