For CW, if radio is set to 7.040 then it will transmit a carrier on 7.040. If you tune to a station transmitting on 7.030 then your radio should also be at 7.039 and the P3 would show a spike on 7.030. The pitch of the audio is done in the receiver so you can make out the code. Otherwise you wound only hear “tch tch tccch” for a “U”.
In the past an adjustable “BFO” or Beat Freeuency Oscilkator was used to beat against the incoming carrier to provide an audio so that you could hear the code. This was often needed due to you hardly ever worked someone on same frequency as your crystal. Once you found someone coming back to you, a turn of the BFO knob could provide a usable audio signal. The TX Sidetone is there for the same reason. Sent from my iPhone ...nr4c. bill > On Jul 23, 2019, at 2:31 PM, Kevin, N4TT <kkinde...@gmail.com> wrote: > > Maybe that's the basic question... > > If I tune the radio to 7.035 to set a CW signal for a pitch of 600 Hz (as > set using the PITCH function) what should I expect to see on the P3? > > 1) The P3 shows 7.035 and the CW signal is offset from the center by 600 Hz? > > 2) The P3 shows 7.035 and compensates for the pitch placing the CW signal > directly under the cursor? > > 3) The P3 shows 7.035600 placing the CW signal directly under the cursor? > > I expect #2. > > I'll be trying out more this evening. > > Kev > >> On Tue, Jul 23, 2019 at 12:47 PM Alan Bloom <n...@sonic.net> wrote: >> >> Good advice. >> >> >> Also be aware that the center frequency differs depending on mode. For >> example, it is the supressed carrier frequency on SSB but is offset by >> typically 600 Hz on CW. >> >> >> I like to use AM mode for frequeny calibration. After doing a frequency >> calibration on the K3, tune to a signal on the AM broadcast band and adjust >> the P3 frequency calibration. (MENU:RefCal. Cal procedurre is on page 39 >> of the manual) As I recall, AM broadcast stations are required to be >> within 20 Hz of nominal frequency but are typically much closer than that. >> >> >> >> Alan N1AL >> >> >> On 2019-07-23 08:20, Bob McGraw K4TAX wrote: ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
