Specifications
7
Complete Your Measurements Quickly and Easily
Operator-oriented features
It’s easy to operate the 8568B. It takes only a few functions to make a basic
signal measurement, and there are many functions available that make
sophisticated measurements as easy to perform as simpler ones.
Basic operation
To start
Press either the [0 to 1.5 GHz] or
[INST PRESET] keys to view the
desired frequency range. Both spans
set all the control states to convenient
preset values (e.g.,0 to 1.5 GHz span,
0 to –90 dBm amplitude range, etc.).
To measure
To measure a signal of interest,
follow this basic sequence:
1.
First. press [CENTER FREQUENCY]
and position the signal at the center
of the screen using one of the data
controls (e.g., the knob, step keys,
or the numeric keypad).
2.
Second, press [FREQUENCY SPAN]
and, using the data controls, reduce
the, displayed frequency range.
3.
Third, press [REFERENCE LEVEL.]
and raise the signal under test to
the top graticule line of the CRT.
4.
The signal’s amplitude and frequency
can be read directly off the CRT.
Coupled functions
The resolution bandwidth, video
bandwidth, and sweeptime are
coupled to the frequency span for
an optimum calibrated display.
RF attenuation and reference level
functions are coupled to insure a
specific input m mixer drive level.
These functions can be uncoupled
and set manually. A warning will
appear on the CRT if the frequency
or amplitude becomes uncalibrated.
Save control settings
Once the analyzer controls have been
adjusted for a particular measurement,
all settings can be saved (or “learned”)
and later called to repeat the
measurement by accessing one of
the six storage registers as follows:
[SAVE] [5], then [RECALL] [5].
You can lock settings in registers and
in softkeys with the Save Lock function.
To execute it, press [SHIFT] [SAVE].
This memory protection function
prevents new register and softkey
settings from being stored, so the
present settings are not erased. To
unlock registers and softkeys. and
remove the memory protection
function press [SHIFT] [RECALL],