Mode Switching Between Analog And Digital Operating Modes - Fluke CombiScope PM3370B User Manual

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3.5 MODE SWITCHING BETWEEN ANALOG AND
DIGITAL OPERATING MODES
You can use the yellow ANALOG key to switch from the analog mode to the digital
mode and back at any time. The signal acquisition and display functions of both
operating modes are very similar. However, the nature of the signals you are
using may determine which operating mode you prefer to use. For more
information, refer to the following table:
SIGNAL CRITERIA
Repetitive signals of
30 Hz and higher
Repetitive signals
below 30 Hz
Single events
Repetitive signals that are
amplitude modulated
Repetitive signals that
are modulated in frequency
Long serial data streams
Video signals
OTHER CRITERIA
Need to see pretrigger
information
ANALOG MODE
Usable
Causes display
flickering
Displayed for the
duration of
the event
Preferred
Preferred
Preferred when
Delayed sweep
is not used.
Preferred when
Delayed sweep
is not used.
Not possible
GETTING STARTED
DIGITAL MODE
Usable
Preferred
Can capture and
display for long
term display
May cause alaising
Use Peak detect or
Envelope mode
May cause aliasing.
Use Envelope mode.
When using delayed
sweep to observe
details, Digital mode
provides better
light output.
When using delayed
sweep to observe
details, Digital mode
provides better
light output.
Up to full acquisition
length