Installation and Service Guide N5250-90001 6-5
PNA Series Microwave Network Analyzer System
N5250A
Performance Tests and Checks
System Performance Verification
S
ystem Performance Verification
Since the N5250C has typical (non-warranted) specifications onl
y, the
SYSTEM PERFORMANCE VERIFICATION is not a PASS/FAIL test. The
SYSTEM PERFORMANCE VERIFICATION is a test to establish BASELINE
PERFORMANCE after the installation.
The system verification procedure is automated by the analyzer firmware. For each verification
device, the analyzer reads a file from the verification disk and sequentially measures the
magnitude and phase for all four S-parameters.
System verification is performed at the N5250C system 1.0 mm port connectors over a
frequency range of 45 MHz to 110 GHz with an Keysight 85059A 1.0 mm calibration and
verification kit.
For system verification to perform correctly, it is NECESSARY that the verification devices be
measured with their female connectors connected to Port 1 and their male connectors
connected to Port 2.
The following procedure, and the connection prompts given, use the 11500-60001 (11500I) 1.0
mm female-to-female cable connected to Port 2. This cable is included in the 85059A 1.0 mm
calibration and verification kit.
When to Verify
After installation of the system is complete, a performance verification is necessary to assure
proper system operation. This initial verification is included with the installation.
After the initial verification, the verification should be repeated once a year. This recommended
interval assumes that Keysight cables are used with the system.
If non-Keysight cables, adapters, or other fixtures are used, the verification schedule must be
determined by the user, as the characteristics of these devices are unknown. In establishing a
verification schedule, the following factors should be considered:
• Frequency of use
• Amount of cable movement
• Amount of drift occurring between prior verifications
Performance verifi
cation of a system performed at long intervals is not to
be confused with measurement calibration. Measurement calibration
typically is performed on a daily basis, or when the measurement setup or
conditions have changed.
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