Tektronix RSA3303B, User Manual

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Calibration
Auto Calibration. Determines whether to automatically perform all possible
calibration operations. The default setting is On.
Service... Only used by quali fi ed personnel for repair and calibration.
If you want to perform all possible calibration operations together, press the
Calibrate All side key. When Auto Calibration is set to Yes, they will be
performed automatically any time the analyzer is in an uncal state.
NOTE.
When you run the calibration during signal acquisition, the calibration
starts after the acquisition is completed.
Calibrating Gain
The gain calibration calibrates the analyzer’s ampli fi er gain using the internal
signal generator. Run this internal calibration routine as required when you boot
the analyzer or when UNCAL (uncalibrated) is displayed during operation.
Allow the analyzer to warm up for 20 minutes before you begin the calibration.
The warm-up period allows electrical performance of the analyzer to stabilize.
During normal operation, when the ambient temperature changes by more than
±5 °C from the temperature at the last calibration, UNCAL is displayed in the
yellow box at the top of the screen. (See Figure 12.) If this happens, run the
gain calibration.
Figure 12: UNCAL display
To run the gain calibration, do the following:
1. Press the CAL key on the front panel.
2. Press the Calibrate Gain side key.
The calibration runs. It takes several seconds to complete the process.
16 RSA3303B, RSA3308B, and RSA3408B User Manual