Jim, You need to separate what your software is doing from what the radio is doing.
If you turn the radio on without using any radio control software, and if after changing modes you press and hold the SHIFT button, the radio will change to its default (NOR) filter settings in that mode. The defaults are (or at least, this is what they are on my radio): SSB: 0.15 kHz to 2.85 kHz CW: PITCH - 0.2 kHz to PITCH + 0.2 kHz DATA A: 1.3 kHz to 1.7 kHz AFSK A and FSK D: PITCH - 0.2 kHz to PITCH + 0.2 kHz Note that the PITCH settings in CW and in RTTY (AFSK A/FSK D) are separate. Evidently the default bandwidth in CW and DATA modes is 0.4 kHz, and in SSB it is 2.7 kHz. The default centre frequency is the selected PITCH in CW and RTTY modes, and 1.5 kHz in SSB and DATA A. If you change any of the shift/width or lo/hi cut settings, the radio will remember the changed settings on a per-mode basis. The remembered settings persist through power on-off cycles; turning the power off and on does not restore the defaults. If you change the bandpass settings in one mode, that change will have no effect on other modes. All four DATA sub-modes change width and offset from the default centre frequency together, although the default centre frequency changes between sub-modes. (Actually there are two remembered settings per mode, labelled I and II - see the Owner's Manual for details.) If you set everything back to the defaults, turn your control software on and change modes from the software, and you discover that the resulting bandpass settings are different from the defaults, that tells you that the software must have sent commands to the radio to select bandpass settings different from the radio's defaults. In that case, you would have to ask the software developers why they chose the particular settings they did. 73, Rich VE3KI ______________________________________________________________ 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
