Good Will Instrument GDS-3000A Series, Руководство пользователя

Страница: 74 / 417

GDS-3000A series User Manual
72
To select the vertical scale of the FFT
waveform, press
Vertical until the dB
or voltage parameters are highlighted
and then use the VARIABLE knob.
Range
2mV~1kV RMS (Linear RMS), 1~20
dB (dB VRMS)
Horizontal
Position and
Scale
To move the FFT waveform
horizontally, press
Horizontal until
the Frequency parameter is
highlighted and then use the
VARIABLE knob.
Range
0Hz ~ half of the sampling
frequency
To select the horizontal scale of the
FFT waveform, press
Horizontal
repeatedly until the Hz/div parameter
is highlighted and then use the
VARIABLE knob.
Advanced Math Overview
Background
The advanced math function allows complex
math expressions to be created based on the input
sources, reference waveforms or even the
automatic measurements available from the
Measure menu (see page 43).
An overview of each of the major parameters that
can be used in the advanced math function are
shown below:
Expression
Displays the function expression as it is created.
Source
Selects the source signal.
Source
CH1~4, Ref1~4
Function
Adds a mathematical function to the expression.