Hi David & Eddie.I'm not the electronics expert who designed the the radio stack. If you look on the data sheet, in the part number, the C in the-AF2CS simply means 15 pulses & the A means 20 pulses. I can't explain how it works. Maybe Mike Powell can jump in here & help. In fact, you should go to his site. He has an explanation about rotary encoders. His site is www.mikesflightdeck.comI'll see if I can take a photo of one. It won't show much more than the picture on the data sheet.Jim

I was looking about it and asked a friend who knows a lot about electronics. As he said this rotary encoder does not have 2 different axes :-(What he means: the RE11 as you can see has at the bottom totally 5 "legs" ( i don't know how you said these thin alumin brackets, you insert in pcb and make the contact)The 2 "legs" from one side, are for the pushbutton fuction to close the circuit when you push the button.The other 3 "legs" are for a typicall rotary encoder, as anyone else.Those you see as A & B in figure 1 is the pulses that a rotary makes when turning cw (clockwise)or ccw (counterclockwise). If the the B singal is coming before the A singal this means that the rotary turns cw and you can increase from your s/w the values and the opposite.Maybe you use these RE11 rotaries for your NAVs and COMs by selecting from your s/w to change the incoming value to different destinations.So maybe you have an if/then/else statement, that checks if the pushbutton is pressed to pass the values to fractions, or if not pressed to nomral Mhz values.But i don't know if this can be done in FsBUS s/w, i think that doesn't support it yet, as does not support at all rotary encoders yet. I hope that Dirk can support these one day :-zhelpAnyway thanks a lot for your help, if you have more news, please make a reply, i think it is an interasting thread for all of us!Have a nice WeekEnd :-)Eddie

HiMore documented explanation is in our webwww.opencockpits.comRegards.Pedro Bibiloni.

>Hi>>More documented explanation is in our web>www.opencockpits.comAwesome, that explanation is very well done, the idea is very much the same that I tried to explain. Thanks for documenting it, looks like I will be digging a lot in your website as well, there seems to be a lot of useful information!Best,Tuomas

Search the forum for "Knitter" - there's been much discussion about encoders from the manufacturer "Knitter-Switch" that does have separate output on the pins depending on which direction you turn.It's been discussed a lot during the last few months./Tuomas