Specifications

10
Trace functions
You can easily manipulate the way trace information is processed and displayed
by the 8568B. Using commands MPY (Multiply) and COMPRESS, traces
can be scaled in amplitude and compressed so more than one trace can be
independently displayed. Other trace processing functions, such as MEAN,
RMS, and STDEV, compute inside the analyzer the mean, RMS, and standard
deviation of trace amplitudes. This can reduce the amount of data that needs
to be transferred to a computer and reduce overall processing time.
Storage
16k bytes of RAM are available
for trace storage, and up to eight
1001-point traces or sixteen 500-point
traces can be stored in RAM and
viewed on the CRT simultaneously
using the TRGRPH (Trace Graph)
command. Also available are three
independent storage buffers, traces A,
B, and C, and these too can be viewed
simultaneously. Traces A and B can
display signal responses in “real time”
when [CLEAR WRITE] is active, or
store them when [VIEW] is activated.
Simplify Your Signal Analysis – continued
Smooth
Low-level signals can be discerned
in one sweep using the SMOOTH
command. SMOOTH makes
measurements much faster than
digital averaging, because multiple
sweeps need not be taken. Like
digital averaging, SMOOTH does not
require an increase in sweeptime, so
it is also faster than video filtering.
Compress
The COMPRESS command reduces
the length of a trace to a user-specified
length, so more than one trace can
be graphed on the analyzer screen.
Each trace can be generated from
completely different control settings.
A signal can be viewed in more than
one state, or several signals can be
viewed simultaneously. Traces that
are compressed require less memory
when stored, so more traces can be
stored. Compressed traces also take
less time to transfer to a computer.
Max hold
The largest amplitude occurring at
each of 1001 horizontal points across
the CRT over successive sweeps may
be displayed with [MAX HOLD].
Max Hold is useful for measuring
peak-to-peak residual FM and drift
over time, or when making swept
response measurements of filters
without a tracking source.