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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7430 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
100 lines
4.0 KiB
Plaintext
100 lines
4.0 KiB
Plaintext
// Status=review
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The following controls appear at the bottom of the Wide Graph window.
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With the exception of *JT65 nnnn JT9* (when operating in JT9+JT65
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mode), they affect only the graphical displays. They have no effect
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on the decoding process.
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image::wide-graph-controls.png[align="center",alt="Wide Graph Controls"]
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- *Bins/Pixel* controls the displayed frequency resolution. Set this
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value to 1 for the highest possible resolution, or to higher numbers
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to compress the spectral display. Normal operation with a convenient
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window size works well at 2 to 8 bins per pixel.
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- *JT65 nnnn JT9* sets the dividing point (blue marker) for wide-band
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decoding of JT65 and JT9 signals in *JT9+JT65* mode. The decoder
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looks for JT65 signals everywhere, but JT9 signals only above this
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frequency.
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- *Start nnn Hz* sets the low-frequency starting point of the
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waterfall frequency scale.
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- *N Avg* is the number of successive spectra to be averaged before
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updating the display. Values around 5 are suitable for normal JT9 and
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JT65 operation. Adjust *N Avg* to make the waterfall move faster or
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slower, as desired.
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- A dropdown list below the *Palette* label lets you select from a
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wide range of waterfall color palettes.
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- Click *Adjust* to activate a window that allows you to create a
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user-defined palette.
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- Check *Flatten* if you want _WSJT-X_ to compensate for a sloping or
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uneven response across the received passband. For this feature to
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work properly, you should restrict the range of displayed frequencies
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so that only the active part of the spectrum is shown.
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- Select *Current* or *Cumulative* for the spectrum displayed in the
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bottom one-third of the Wide Graph window. *Current* is the average
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spectrum over the most recent *N Avg* FFT calculations. *Cumulative*
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is the average spectrum since the start of the present UTC minute.
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*Linear Avg* is useful in JT4 mode, especially when short-form
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messages are used.
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- Four sliders control reference levels and scaling for waterfall
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colors and the spectrum plot. Values around midscale are usually
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about right, depending on the input signal level, the chosen palette,
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and your own preferences. Hover the mouse over a control to display a
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tip reminding you of its function.
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- *Smoothing* is active only when *Linear Average* has been selected.
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Smoothing the displayed spectrum over more than one bin can enhance
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your ability to detect weak EME signals with Doppler spread more than
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a few Hz.
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[[CONTROLS_FAST]]
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=== Fast Graph
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The waterfall palette used for the Fast Graph is the same as the one
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selected on the Wide Graph. Three sliders at the bottom of the Fast
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Graph window can be used to optimize gain and zero-offset for the
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displayed information. Hover the mouse over a control to display a
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tip reminding you of its function. Clicking the *Auto Level* button
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will produce reasonable settings as a starting point.
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image::fast-graph-controls.png[align="center",alt="Fast Graph Controls"]
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[[CONTROLS_ECHO]]
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=== Echo Graph
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The following controls appear at the bottom of the Echo Graph:
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image::echo-graph-controls.png[align="center",alt="EchoGraph Controls"]
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- *Bins/Pixel* controls the displayed frequency resolution. Set this
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value to 1 for the highest possible resolution, or to higher numbers
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to compress the spectral display.
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- *Gain* and *Zero* sliders control scaling and offset of plotted
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spectra.
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- *Smooth* values greater than 0 apply running averages to the plotted
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spectra, thereby smoothing the curves over multiple bins.
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- Label *N* shows the number of echo pulses averaged.
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- Click the *Colors* button to cycle through 6 possible choices of
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color and line width for the plots.
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[[CONTROLS_MISCELLANEOUS]]
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=== Miscellaneous
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Most windows can be resized as desired. If you are short of screen
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space you can make the Main Window and Wide Graph smaller by hiding
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some controls and labels. To enable this feature type *Ctrl+M* with
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focus on the appropriate window. (For the Main Window you can select
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*Hide menus and labels* on the *View* menu.) Type *Ctrl+M* again
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to make the controls visible once more.
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