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AD8000 Series Spectrum Analyzer Instruction
Manual
3.2.3 Measurement Parameter Settings
M EA S
The
key is used to set some special functions of the measurement
SETUP
parameters. Press the key, and the following menu would pop up
Fig. 3-41 Measurement Parameter Settings Menu
1
Display Line
Set 'Disp Line' to 'On', a red line will appear in the middle of the screen.
When move the line with the up/down key or the knob, the amplitude
information would change as well.
The comparison funtion could be turned on with display line on. After
turning on the funtion, the system would record the amplitude information
of the signal which is a wave. After that, the differential value of new data
and saved data would show up near the display line. From the following
figure, it could be seen that since the signal is relative stable, the
flunctuation of the comparison of the signal and display line intersectant
part is relatively small. Since the noise is produced randomly, the
flunctuation is relatively large.
It is generally suitable that the display line is at the center of the screen
when turning on. But when the signal is too small, it could be adjusted
manually.
65
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