thanks for all the detail.

Assume in all cases that I'm in the centre of Leeds, with no hi-jack, all stations are showing full strength, steady RDS indicator, TA and AF, and where appropriate TP and strong enough to show the information line at the bottom.

Stations that are on presets continue to give no AF information on the de-bugger.

What I have now discovered is that stations that I have tuned manually come up with the graph exactly as described.

I initially thought that it was the BBC stations that provoked the no AF information in the debugger, but the AF indicator is on on the standard info mode.

Therefore, logical, or not, it seems to be preset stations that provoke the problem.

Going into a meeting now, I'll give it another try after 2.00 and make sure that I come to the same conclusion.