Yep! That's a huge advantage for the K3 in which one can open up the roofing filter bandwidth for casual, non-critical operation and use a panadapter, then close the bandwidth down by selecting a narrower roofing filter for best dynamic range and weak-signal performance and give up the panoramic display.
Like anything else, getting good results from a great tool requires that it be used correctly. Ron AC7AC -----Original Message----- Ron D'Eau Claire <[EMAIL PROTECTED]> wrote: >There's a *huge* performance tradeoff involved in trying to "see" the a >wide >frequency range on a 'scope and trying to hear *one* weak signal. In >receivers with a front end that is "broad as a barn" (including the first >I.F. in modern receivers), the panadapter can show you many signals within >that passband, but not all the signals. That is true to a point which depends greatly on the design and signal handling capability of both the receiver and of the panadapter. Also the requirements placed on a panadapter for use in a pile up or for use in the type of routine band monitoring that I had in mind ( "dead" VHF or HF bands ) are quite different. In a pile up situation I would not attempt to "copy" a weak DX signal with the panadapter but do use it in attempting to find a clear spot among the callers, in which case the panadapter can be fed via a wide filter branching from but otherwise separate from the main signal path. A nominal bandwidth of 7kHz appears to cover most pile up situations. But the true In Passband 3rd Order dynamic range of both receiver and panadapter must be suitably large to avoid trash being displayed. 73, Geoff GM4ESD _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
