FLEX-6000 Signature Series – Maestro User Guide
Page 152
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The DAXIQ control allows the user to select the DAXIQ channel (1-4) that will stream IQ data from
the Panadapter. Tap this control to display a selection of channels, or Off.
The Fill control adjusts the amount of shading that is applied to the portion of the spectrum display
below the signal line. The fill color can be chosen from the drop-down menu to the right of the Fill
control.
The Rate control adjusts how quickly the Waterfall advances on the screen. At the lowest setting,
many minutes of data can be displayed. At its highest setting, the Waterfall displays a rapidly
changing spectrum in the most detail.
The Gain, Black and Auto controls work together to adjust how different signal levels are displayed
in the Waterfall. The Black control sets the level below which all pixels will render as black. In other
words, it sets the level at which signals are no longer of interest. The Auto control automatically sets
the black level to just below the noise level as band conditions, preamplifier changes or antenna
changes alter the noise floor.
The Gain control adjusts how rapidly the Waterfall will advance through the color spectrum for
minimal changes in signal level. Lowering the gain gives the Waterfall a broader dynamic range but
lessens its ability to show small variations signals. Raising the gain lowers the dynamic range but
provides more detail in the variances in smaller signals’ magnitudes.
In most cases Auto Black properly adjusts the background color or black level for the display’s zoom
factor and its relative noise floor. However, you can manually adjust the Waterfall’s settings to
display weak signals at or near the noise floor. If the Black Level is set too low, many of the “in the
noise” FFT bins will be zero, regardless of the Gain setting. To achieve an ideal setting for the Black
Level, do the following:
• Adjust the Gain to maximum.
• Adjust the Black Level to a point where the Waterfall is primarily white, but there are
approximately 2-5% black areas displayed.
• Decrease the Gain until the background is deep blue.
This ensures that small signals in the noise will be easily seen.
The Color control offers options for the color scheme used in the Waterfall.
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