In the process of investigating this further, I tripped over a very nice diagnostic tool: the Config menu's "SW TEST" entry. This option can be set to "SCN ADC" to allow monitoring of the 4 potentiometer inputs to the PIC processor ADCs. This allows one to verify the range and linearity of the pots very easily.
As expected, the ADC outputs produce a linear count ranging from 002 to 240 for the full travel of the pots (all 4 of them exhibit the same results). Those counts correspond to input voltages (from the pots) of 0.039V and 4.71V, respectively, which are essentially what I measured with my voltmeter. This method is MUCH easier, however, and eliminates any question as to what the ADC is actually seeing on its inputs. ----- 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Rf-gain-tracking-main-vs-sub-tp5668917p5673239.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
