Anritsu 373XXA - Manual (Page 50)

Error Correction:
Perform software-guided 12 term calibration.
Special Precautions: When performing the procedures in this chapter, observe the following
precautions:
q Minimize vibration and movement of system and attached compo-
nents and through-cable.
q Clean and check pin depth and condition of all adapters,
through-cable(s), and calibration components.
q Pre-shape the through-cable(s) so as to minimize its movement dur-
ing calibration and measurement activities.
q Ensure the system remains motion free in stable environmental
conditions as defined above throughout warm-up, calibration, and
measurement activities.
4-3
MEASUREMENT
ACCURACY The verification procedures described in the following paragraphs verify
the published measurement accuracy and measurement traceability* for
the 373XXA.
Verification Software These procedures use the ANRITSU VNA Verification Software, PN:
2300-237, and the NIST traceable impedance transfer standards con-
tained in the appropriate ANRITSU Verification Kit. The Standard Con-
ditions and Special Precautions described in paragraph 4-2 should be
observed when performing these procedures.
The appropriate ANRITSU Verification Kit to be used for performing
these procedures is model dependent, as follows:
q Models 37317A and below, with Opt 7A: Verification Kit 3667
q All Models using K Connector test ports: Verification Kit 3668
q Models 37397A: Verification Kit 3669B
The impedance transfer standards contained in these kits are:
q 20 dB Attenuation Standard
q 50 dB Attenuation Standard
q 50 Ohm Air Line Standard
q 25 Ohm Mismatch (Beatty) Standard
The verification software performs the following functions:
q It guides the user through a full 12 Term calibration of the 373XXA.
q It guides the user through the measurement of the S-parameters of
the NIST traceable impedance transfer standards (below).
q It verifies the measured values are within the specified measure-
ment uncertainty limits.
q It indicates the pass/fail status of the measurements on the CRT
display. It can also provide a hard copy printout of the measured
MEASUREMENT ACCURACY PERFORMANCE VERIFICATION
4-4 373XXA MM
∗ Traceability to the U.S. National Institute of Standards and Technology (NIST)