HP 8568B, Performance Tests And Adjustments Manual, Page: 31 / 313

3. Sweep Time Accuracy Test ms)
3. Sweep Time
Accuracy Test
Related Adjustment
Frequency Control Adjustments
Specification
for sweep times seconds
for sweep times seconds
Description Preferred Procedure
This test is for sweep times ms. For faster sweep times, refer to
Fast Sweep Time Accuracy Test (Test 19).
A universal counter is connected to the RECORDER
OUTPUT (on
the
rear panel) of the spectrum analyzer. The counter is
used in time interval mode to determine the “pen down” (sweep time)
interval of the
RECORDER OUTPUT. The output
voltage level corresponds directly to the sweeping of the analyzer
(pen down = OV) and not-sweeping of
the
analyzer (pen up = A
DVM is used to set the appropriate trigger level for the counter.
Alternate Procedure
Perform this procedure if the equipment for
the
preferred procedure
is unavailable.
Sweep time accuracy for sweep times ms can also be measured
using the HP internal frequency counter for a time interval
measurement.
SPECTRUM ANALYZER
UNIVERSAL
COUNTER
DIGITAL VOLTMETER
Figure 2-4. Sweep Time Accuracy Test Setup
Performance Tests 2-9