Musical Instrument User Manual

HOW TO USE THE INSTRUMENT 4 - 9
4.3 ANALOG AND DIGITAL MODES
This instrument is a combination of an analog real-time oscilloscope and
a digital storage oscilloscope, which offers a variety of additional features.
The combination of analog and digital modes in one instrument gives
you the advantages of both modes.
In the
ANALOG MODE
the signal is directly written on the screen. The result is
the "traditional" real-time signal representation. Because of the high update rate
and infinite resolution, this image gives signal details that are visible only on true
analog oscilloscopes.
In the
DIGITAL MODE
the input signal is sampled. These samples are stored in
memory so that mathematics, calculated measurements, printing, and other
memory functions can be performed on the trace.
You can use the yellow ANALOG push button 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 ANALOG MODE DIGITAL MODE
Repetitive signals of Usable Usable
30 Hz and higher
Repetitive signals Causes display Preferred
below 30 Hz flickering
Single events Display for Can capture and
duration of display for long
the event term
Repetitive signals that Preferred May cause aliasing.
are amplitude modulated Use Peak detect or
Envelope mode
Repetitive signals that Preferred May cause aliasing.
are modulated in frequency Use Envelope mode.
Long serial data streams Preferred when When using delayed
Delayed sweep sweep to observe
is not used. details, Digital mode
provides better
light output.
ANALOG