Keith G wrote:

I don't mind admitting that most of the information on this page:

http://www.apah69.dsl.pipex.com/show/Tuner.JPG

flies right over my head, but it's all very interesting! What is
paragraph 5 saying - that my *analogue* tuner is carrying out A/D and
D/A conversions..??

Sampling doesn't imply any form of 'digital' operation.

Graham