Acquire the Sign
al
1. Push BW to bring
up the resolution
bandwidth side menu. This allows you to set
the smallest frequency difference that the
instrument ca
n discern in the frequency axis.
Bandwidth
2. Push RBW Mode to select either Auto or
Manual.
Auto sets the resolution bandwidth
automatically as you change the span. The
default behavior is RBW = Span/1000.
Manual allows you to set your own
resolution bandwidth.
RBW
Mode
Auto
Manual
3. To manually adjust the RBW, push RBW
and turn multipurpose knob a.
RBW
(a)
600 kHz
(Auto)
4. Push Span : RBW and turn multipurpose
knob a to set the span/RBW ratio.
ThisratioisusedwhentheRBW Mode is
set to Auto. The default is 1000:1 but you
can set it to other values in a 1-2-5 sequence
(e.g. 1000, 20000, 50000).
Span :
RBW
1000 : 1
5. Push Window and turn multipurpose knob a
to choose w hich FFT window type to use.
The choices are: Kaiser, Rectangular,
Hamming, Hanning, Blackman-Harris, or
Flat-Top.
Window
Kaiser
MDO4000 Series Oscilloscopes User Manual 79