Yaesu FT DX 1200 Operation Manual

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Page 81FT DX 1200 O PERATING M ANUALCW SPOTTING (ZERO -B EATING)“Spotting” ]eroing in on another CW station) is a handy techniTue to ensure you and the other station are precisely onthe same freTuency.The Tuning 2ffset Indicator in the display may also be moved so you can adjust your receiver freTuency to center theincoming station on the pitch corresponding to that of your transmitted signal.Using the Auto Zeroing System2nly when the optional FFT unit is installed)3ress the [S /T /W /X ] button to select the “ZIN/SPOT”. 3ress the [SELECT] switch momentarily toadjust the receiving freTuency to the ]ero-in automati-cally while receiving the CW signal.Using the SPOT System3ress the [S /T /W /X ] button to select the “ZIN/SPOT”. 3ress the [MONI] button, then while pressingthe front panel [SELECT] button, the Spot tone will beheard through your speaker. This tone corresponds to thepitch of your transmitted signal. If you adjust the receiv-er freTuency until the pitch of the received CW signalmatches that of the Spot tone, your transmitted signalwill be precisely matched to that of the other station.5elease the [SELECT] button to turn the Spot tone off.A DVICE : In a tough '; pile-up, you may actually want touse the S32T system to ¿nd a “gap” in the spreadof calling stations, instead of ]eroing in preciselyon the last station being worked by the '; station.From the '; side, if a do]en or more operators alsousing Yaesu’s S32T system) all call precisely on thesame freTuency, their dots and dashes merge into asingle, long tone that the '; station cannot decipher.In such situations, calling slightly higher or lower infreTuency may get your call through. The Tuning 2ffset Indicator in the display may beutili]ed for CW freTuency adjustment, as well. Itscon¿guration is set via 0enu item “011 BAR DIS-PLAY SELECT” at the factory, and the Tuning 2ffsetIndicator is already set to the “CW TUNE” selection.QUICK POINTS: The CW Spotting process utili]es the Spot tone orthe Tuning 2ffset Indicator. The actual offset pitchis set by 0enu item “056 CW PITCH”. The offsetpitch may be set to any freTuency between 300 H]and 100 H], in 0 H] steps. You can either matchtones audibly using the [SELECT] button) or tunethe receiver freTuency so that the central red markeron the Tuning 2ffset indicator lights up. 1ote thatthere are 31 “dots” on the Tuning 2ffset Indicator,and depending on the resolution selected, the incom-ing CW signal may fall outside the visible range ofthe bar indicator, if you are not reasonably close tothe proper alignment of tones.CW C ONVENIENCE FEATURES The displayed freTuency on CW normally reflectsthe “]ero beat” freTuency of your offset carrier. Thatis, if you were to listen on USB on 14.100.00 0H]to a signal with a 700 H] offset, the “]ero beat” fre-Tuency of that CW carrier would be 14.100.70 0H]the latter freTuency is what the FTDX 1200 displays,by default. However, you can change the display tobe identical to what you would see on SSB by using0enu item “066 CW FREQ DISPLAY” and settingit to “DIRECT FREQ” instead of the default “PITCHOFFSET” setting.[SELECT] Button[MONI] ButtonZIN/SPOT IndicatorRetune: Shift to Higher FrequencyRetune: Shift to Lower FrequencyZero-In