1-9 Preventive Maintenance General Information
1-8 PN: 10580-00305 Rev. J MS20xxC UG
1-9 Preventive Maintenance
VNA Master preventive maintenance consists of cleaning the unit and inspecting and
cleaning the RF connector on the instrument and all accessories. Clean the VNA Master with
a soft, lint-free cloth dampened with water or water and a mild cleaning solution.
Clean the RF connectors and center pins with a cotton swab dampened with denatured
alcohol. Visually inspect the connectors. The fingers of N(f) and K(f) connectors and the pins
of N(m) and K(m) connectors should be unbroken and uniform in appearance. If you are
unsure whether the connectors are good, then gauge the connectors to confirm that their
dimensions are correct. Type K(f) test port connectors are availableon some models with
Option 11.
Visually inspect the test port cables. The test port cable should be uniform in appearance, not
stretched, kinked, dented, or broken.
1-10 Calibration Requirements – Vector Network Analyzer
The VNA Master is a field portable unit operating in the rigors of the test environment. In
order to ensure measurement accuracy, RF calibration (OSLT or SSLT, for example) must be
performed prior to making a measurement in the field.
The VNA Master has no field-adjustable components. The RF (OSLT, SSLT, and SSST)
calibration components, however, are crucial to the integrity of the calibration and should be
periodically verified to ensure their performance. This is especially important if the
components have been dropped or over-torqued.
1-11 Annual Verification
Anritsu recommends an annual calibration and performance verification of the VNA Master
and the calibration components by local Anritsu service centers. Anritsu service centers are
listed our web site at:
http://www.anritsu.com/Contact.asp
Caution
To avoid damaging the display or case, do not use solvents or abrasive
cleaners.
Note
For best calibration results (compensation for all measurement uncertainties),
ensure that the calibration is performed at the end of the test port or optional
extension cable; that is, at the same point that the device that is to be tested will be
connected.
Caution
For best results, use an Anritsu phase stable Test Port Extension Cable, such as
those listed in the Technical Data Sheet for your instrument (refer to Appendix A).
Use of a typical laboratory cable to extend the VNA Master test port to the device
under test, or any bending of the cable subsequent to the OSL or OSLT calibration,
may cause uncompensated phase reflections inside the cable. Reflections of this
type cause measurement errors, which are more pronounced at higher frequencies.
ООО "Техэнком" Контрольно-измерительные приборы и оборудование www.tehencom.com
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