I wrote: > The K1 receiver operates on lower sideband for all bands. If you > have properly set your CW offset to, say, 600 Hz, then your > transmitter frequency will be 0.6 kHz lower than your receiver > frequency. Most hams want the frequency display to show > transmitter frequency rather than receiver frequency. In that > case, when you are zero-beat with a signal at, say, 6999.3 kHz, > you'd want the LCD display to show 6999.3 - 0.6 = 6998.7 kHz, > which will be the frequency transmitted when key-down.
Don wrote: >The display frequency indicated above is not quite correct. >When zero-beat with a signal (meaning to hear the signal at the >sidetone pitch), the receiver display should indicate the frequency >of the carrier. >Yes it is true that under these conditions, the >actual receiver frequency is offset by 600 Hz, but the frequency >display should show 6999.3 (the center of the receiver passband >will be 6999.9 kHz) Hi Don, I agree with all you say if I want my LCD to display the **receiver** frequency, But I think you missed my main point: I want my LCD to display the **transmitter** frequency, since from a standoint of operating close to band lower limits, the transmitter frequency is what is subject to regulatory requirements. So, for a LSB receiver with a CW transmitter offset, the transmitter frequency will be *below* the receiver's zero-beat frequency by the amount of offset. For example, I use a 600 Hz offset on my K1. If I am zero-beat with 10000 kHz WWV, my K1 display actually shows 9999.4 kHz, since that is the frequency that my K1 transmitter will emit if I key it. >Yes it is true that under these conditions, the >actual receiver frequency is offset by 600 Hz, but the frequency >display should show 6999.3 (the center of the receiver passband >will be 6999.9 kHz) I define actual receiver frequency as the zero-beat frequency, and I define actual transmitter frequency as that which would be determined by a frequency counter. 73, Mike / KK5F _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
