Specifications

8
Direct plotter output
All trace, graticule, and annotation
information displayed on the CRT
can be plotted without the aid of a
controller. Simply connect the plotter
via GP-IB to the 8568B (set plotter
address to 705) and press the
LOWER LEFT key on the front panel.
Complete Your Measurements Quickly and Easily – continued
Marker-aided measurements
The tunable marker makes basic signal measurements easily and accurately
by measuring signals directly. It also speeds the process of zooming in on a
portion of the frequency spectrum.
Direct measurements
[NORMAL] activates a tunable marker
whose amplitude and frequency are
displayed on the CRT. Signals can
be measured directly by tuning the
marker along the trace to the peak
of the signal. Internal commands
allow moving the marker to the
highest signal, next highest signal,
and next left or next right signal.
[FREQ COUNT] eliminates the
need for centering the marker by
displaying the frequency of the
signal on whose response the marker
is tuned — to counter accuracy.
Relative measurements
A second marker for making relative
measurements can be generated by
pressing [DELTA]; the difference
in amplitude and frequency between
the two markers is numerically
displayed on the CRT. The reference
frequency need not be displayed.
This feature is especially convenient
when comparing various spectral
component levels to a carrier or
fundamental to determine percent
modulation or distortion.
Multiple markers
Up to four markers can be placed
on the display to make direct and
relative measurements at the same
time. Each marker reads the amplitude
and frequency value of its position on
the display. The markers are activated
individually and can respond to
any of the marker commands when
activated. While one marker is active,
relative measurements can be made
with the other three markers.