Wavecom W40PC, Руководство пользователя

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Advanced Topics WAVECOM Decoders v6.15 W40PC, W41PC, W51PC
dimensional Real-Time-FFT display only shows a fraction of the data, depending on the
modulation method. In contrast the FFT waterfall display gives a display also in the time
domain
Waterfall analysis is started by clicking on a desired bandwidth "
BW 500 Hz
", "
BW 1000
Hz ", " BW 4000 Hz " or " BW 24 kHz ".
The W51PC also supports " BW 2 kHz ", " BW 48 kHz ", " BW 96kHz ".
A time histogram is displayed on the right-hand side of the display.
The options "
Average Factor"
and "
Window Type
" are identical to the same Real-time
FFT functions.
From the " Options/Period " menu the time unit per measurement may be selected. The
lowest value is 50 ms corresponding to a sampling rate of 20 pictures/s. For the highest value
of 10'000 ms a measurement is done once every 10 seconds, giving a total time span of more
than 400 seconds.
By clicking on the graph the display will be
paused
and
measurement cursors
appears.
Several
color schemes
are available through the right-click menu.
HF REAL-TIME WATERFALL
The Analysis is started with the input, gain, translation frequency etc. that was used, last time in a HF mode. This
selection is only available in the menu Preferences… the "When selecting the toolbar
"Analysis Buttons" start HF analysis mode" is not enabled. (See Preferences…
on page 54)