[quote=老干部]main vfo (a) down-conversion design (like elecraft and ten tec).
sub vfo (b) up-conversion design
main vfo (a) 1st if: 9.000 mhz (lo upper)
2nd if: 30 khz ssb/cw, 24 khz fm/am
sub vfo (b) 1st if: 40.455 mhz (lo upper)
2nd if sub: 455 khz (lo lower)
3rd if sub: 30 khz ssb/cw, 24 khz fm/am
local oscillators:
main vfo (a) lo operating frequency 9.030 – 69.000 mhz
sub vfo (b) lo operating frequency 40.485 – 100.455 mhz
sub vfo (b) ssb/cw lo 425 khz (for 2nd if)
超耐人寻味[/quote]
跟我原先分析的一样,是一台杂交机. 不过总算往正确的方向前进了一小步.