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Channel analyzer NG: updated documentation

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f4exb 2018-05-22 22:43:41 +02:00
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plugins/channelrx/chanalyzerng/readme.md
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@ -158,7 +158,7 @@ This button selects the display of all traces on the left side of the screen and
<h3>6. Line or points only display on the 2D XY display (right)</h3>
Use this button to toggle points display (on) or line display (off) for the 2D XY display on the right. The points display may yield a more visible graph when the distinct artifact is an aggregation of points.
Use this button to toggle points display (on) or line display (off) for the 2D XY display on the right. The points display may yield a more visible graph when the distinct artifact is an accumulation of points.
<h3>7. Select trace intensity</h3>
@ -256,7 +256,7 @@ To construct a trace which represents real values the incoming complex signal mu
The signal is synchronized with the PLL in 4 phase mode (locker icon is green).
- A Tetra signal is QPSK modulated at 18 kSym/s therefore the sample rate is set at 90 kS/s thus we have an integer number of samples per symbol (5 samples per symbol). See green square.
- We have set two traces (X and Y1) with QPSK projection. The Y1 trace is delayed by two symbols (10 samples) which makes a 111.11 &#956;s delay. See blue square
- In XY mode on the XY display (right) we can see an accumulation of points around the 16 possible symbol transitions. In two places the same symbol is repeated several times which results in a stronger aggregation. One is with the symbol at 0 (see red circle and square) and the other is with the symbol at &#960; (see yellow circle and square).
- In XY mode on the XY display (right) we can see an accumulation of points around the 16 possible symbol transitions. In two places the same symbol is repeated several times which results in a stronger accumulation. One is with the symbol at 0 (see red circle and square) and the other is with the symbol at &#960; (see yellow circle and square).
- On the left panel of the XY mode display we can see that the 4 possible symbols mark 4 vertical stronger areas centered on 0.25, 0.75, -0.25 and -0.75.
**Note2**: in the MagDB mode when the trace is selected (1) the display overlay on the top right of the trace shows 3 figures. From left to right: peak power in dB, average power in dB and peak to average difference in dB.