Do you have any possibility to show all channels of e.g. GSM900 at once? I know its quite a lot of data and so far i know of no analyzer supporting such a feature.

Since we have no sweep resolution limit on the SPECTRAN units and the MCS hase no resolution limit too this is indeed possible

Attached is a live screenshots showing a Ultra HD (4k) snapshot of the complete German GSM900 downlink frequency (38,6MHz). It shows the spectrum, all channels and the complete provider list at the same time.
The snapshot was taken from our 4k (ULTRA HD) monitor at our booth at the Electronics 2012 show in Munich: