Keysight N5224B, Руководство по обслуживанию

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3-4 Keysight N5224B/25B Service Guide
Tests and Adjustments
Before You Begin
3-
Before You Begin
Before checking, verifying, or adjusting the analyzer, refer to the following
paragraphs to:
— make sure the operating environment is within its requirements
— make sure that proper electrostatic discharge (ESD) protection is provided
— make sure the analyzer has warmed up properly to achieve system stability
— review the principles of connector care
Verify the Operating Environment
Due to their operating specifications, the verification and calibration kit devices
determine the limits of your operating environment conditions. Open the
calibration and verification kits and place all the devices on top of the foam
inserts so they will reach room temperature. As the device dimensions change
with temperature, their electrical characteristics change as well.
It is necessary to keep the environmental levels within the following limits:
— Temperature: +23
°
C ± 3
°
C (Error-corrected temperature range)
Once the measurement calibration has been done, the ambient
temperature must be maintained to within ± 1 ° C of the calibration
temperature.
— Humidity: 0% to 95% at 40
°
C maximum, non-condensing
— Altitude: 0 to 4,600 meters (
≈
15,000 feet.)
Protect Against Electrostatic Discharge (ESD)
This is important. If not properly protected against, electrostatic discharge can
seriously damage your analyzer, resulting in costly repair.
Keysight personnel: see Figure 1-1 on page 1-6 to review where the
calibration stickers should be placed on the PNA.
To reduce the chance of electrostatic discharge, follow all of the
recommendations outlined in “Electrostatic Discharge Protection” on
page 1-7 , for all of the procedures in this chapter.