User Manual

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.
VARI A BL
E
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.
VARI A BL
E
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.
V
O
LTS/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.
VARI A BL
E
Range
1/2/5/10/20X