Thanks a lot Turbo :-) this explain how the TG works, and why it can not be used as a free generator.
just sold my old HP generator and SA,
what a bummer :-)
by the way, some one wrote to me via email,
about the waterfall color range, i share the findings here, (thanks a lot mate)
For the spectrum monitor, if you press amplitude then change the db/div to
2db, press measure, then spectrum monitor again and use the knob to adjust
the bottom of the spectrum you can change the colours. To change the
speed, press bw and alter the RBW setting, the narrower the bin size, the
slower the spectrum monitor will be.