GW Instek GDS-1000A-U Series User Manual - Manual (Page 66)

GDS-1000A-U Series User Manual
66
5. The FFT result appears. The horizontal scale
changes from time to frequency, and the
vertical scale from voltage to dB or RMS.
6. To move the FFT waveform
vertically, press Vertical
repeatedly until Div is
selected. Use the Variable
knob to change the vertical
scale.
Vertical
2V
0.00 Div
VARIABLE
Range –12.00 Div ~ +12.00 Div
7. To select the vertical scale of
an FFT waveform, press
Vertical repeatedly until dB
is selected. Use the Variable
knob to change the vertical
scale.
Vertical
1 dB
0.00 Div
VARIABLE
Range 1, 2, 5, 10, 20 dB/Div
8. To select the vertical scale of
an FFT rms waveform, use
the VOLTS/DIV knob to
change the vertical scale.
The scale will be shown in
the Vertical soft-key.
VOLTS/DIV
Range Volts/Div
9. To zoom in on the FFT/FFT
rms waveform, press Zoom
repeatedly until X is
selected. Use the Variable
knob to change the Zoom
level.
Zoom
1X
0.0000Hz
VARIABLE
Range 1/2/5/10/20X