Anritsu 37 D Series, Руководство по обслуживанию, Страница: 84 / 190

Special Precautions When performing the procedures in this chapter, observe the following
precautions:
q Minimize vibration and movement of the system, attached compo-
nents, and through-cable.
q Clean and check the pin depth and condition of all adapters,
through-cable(s), and calibration components.
q Pre-shape the through-cable(s) so as to minimize their movement
during calibration and measurement activities.
5-3
MEASUREMENT
ACCURACY The verification procedures described in the following sections verify
the published measurement accuracy and measurement traceability*
for the VNA.
Verification Software These procedures require the use of the VNA Verification Software
package that is included in the Verification Kit. See Table 1-1 for
software part numbers. The Standard Conditions and Special
Precautions described in Section 5-2 should be observed when
performing these procedures.
The verification software performs the following functions:
q It guides the user through a full 12-term calibration of the VNA.
q It guides the user through measurements of the S-parameters of the
NIST traceable standards (below).
q It verifies that the measured values are within the specified mea-
surement uncertainty limits.
q It indicates the pass/fail status of the measurements on the display.
q It can also provide a hard copy printout of the measured data, mea-
surement uncertainties, and the standards used.
NOTE
The total verification uncertainty in these VNA measure-
ments includes the measurement uncertainty of the verifica-
tion standards and the uncertainty of the VNA itself.
MEASUREMENT ACCURACY PERFORMANCE VERIFICATION
5-4 37XXXD MM
* Traceability to the U.S. National Institute of Standards and Technology (NIST)