Keysight Technologies 11644A K, User'S And Service Manual

Page: 18 / 72

2-6 X, P, and K 11644A
Specifications
Electrical Specifications
Measurement Uncertainty
Vector Network Analyzer (VNA) measurement accuracy depends on the accuracy of the calibration
standards, the calibration method employed, instrumentation accuracy and stability, environmental factors,
and the actual characteristic of the device under test (DUT). Because of the complexity in these
relationships, Keysight created uncertainty computation tools to calculate the overall measurement
uncertainty of a VNA system. In the past, when the Keysight 8510 VNA system was being produced, a
“Specification and Verification” RMB program was included to perform an uncertainty calculation.
Currently, for the Keysight PNA and ENA families of network analyzers, a customer can download the VNA
Uncertainty Calculator program. (To access this program from the Web, navigate to www.keysight.com and
enter “calculator” in the Search function.) Explanations of the uncertainty model are provided in the PNA
embedded Help files. Additional references on VNA measurements are available from the Keysight
Applications Notes and Technical Papers Web page, accessed from www.keysight.com by clicking on the
Application Notes and Technical Papers hyperlink.
Certification
Keysight Technologies certifies that this product met its published specifications at the time of shipment
from the factory. Keysight further certifies that its calibration measurements are traceable to the United
States National Institute of Standards and Technology (NIST) to the extent allowed by the institute’s
calibration facility, and to the calibration facilities of other International Standards Organization members.
See
“How Keysight Verifies the Devices in Your Kit” on page 5-2 for more information.