Adjustments
Power Reference Oscillator Level Adjustment
| Power Reference Oscillator Level Adjustment |
| Description |
| This test adjusts the power level accuracy of the internal 50 MHz |
| |
| The power reference oscillator output is factory adjusted to 1 mW ±0.4%. |
| This accuracy includes a performance limit of 0.1% and a system |
| measurement uncertainty figure of 0.3% (traceable to the National |
| Physical Laboratory (NPL), UK). |
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Note | The setting of the oscillator output accuracy is determined from the |
| system measurement uncertainty plus any chosen test line limit. For |
| example, if a test line limit of 1 mW ±0.2% was chosen while |
| maintaining a system measurement uncertainty of ±0.3%, the overall |
| accuracy of the test setup for the 1 mW power output becomes 0.3% + |
| 0.2%, giving a setting accuracy of 0.5%. |
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|
If an equivalent measurement system is employed for
•Test line limit: 0.1%.
•System uncertainty: 0.3%.
•2 year oscillator drift: 0.04%.
•Delta environment: <0.06%.
The following adjustment procedure ensure the power reference oscillator meets the
Note | To ensure maximum accuracy in |
| oscillator output, this procedure provides |
| using Agilent test instruments of known capability. Signal acquisition |
| criteria may vary if alternative test instruments are used. In such |
| cases refer to the manufacturer’s guidelines for further information. |
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Agilent E4418B/E4419B Service Guide |