Vertex Standard manual FT-950 Operating Manual

FT-950

Operating Manual

of your transmitted signal, and if you adjust the receiver frequency to match the pitch of the received CW signal to that of the Spot tone, your transmitted signal will be precisely matched to that of the other station.

Release the [SPOT] button to turn the Spot tone off.

Advice:

In a tough DX pile-up, you may actually want to use the SPOT system to find a “gap” in the spread of calling stations, instead of zeroing in precisely on the last station being worked by the DX station. From the DX side, if a dozen or more operators (also using Yaesu’s SPOT system) all call precisely on the same frequency, their dots and dashes merge into a single, long tone that the DX station cannot decipher. In such situations, calling slightly higher or lower may get your call through.

The Tuning Offset Indicator in the display may be utilized for CW frequency adjustment, as well. Its configuration is set via Menu item “006 DISP BAR SEL” at the factory, and the Tuning Offset Indicator is already set to the “C-tn” selection.

Quick Points:

The CW Spotting process utilizes the Spot tone or the Tuning Offset Indicator. The actual offset pitches being set by the Menu item “045 A1A PITCH” (see page ??). The offset pitch may be set to any frequency between 300 Hz and 1050 Hz, in 50 Hz steps, and you can either match tones audibly (using the [SPOT] button) or align the receiver frequency so that the central red LED on the Tuning Offset indicator lights up. Note that there are 21 “dots” on the Tuning Offset Indicator, and depending on the resolution selected, the incoming CW signal may fall outside the visible range of the bar indicator, if you are not reasonably close to the proper alignment of tones.

The displayed frequency, on CW, normally reflects the “zero beat” frequency of your offset carrier. That is, if you were to listen on USB on 14.100.00 MHz to a signal with a 700 Hz offset, the “zero beat” frequency of that CW carrier would be 14.000.70 MHz; the latter frequency is what the FT-950 displays, by default. However, you can change the display to be identical to what you would see on SSB by using Menu item “047 A1A FRQDISP” and setting it to “dIr” instead of its default “OFSt” setting.

81 Vertex Standard Co., Ltd.