Performance Tests
Power Reference Level Test
Power Reference Level Test
Electrical | Performance | Conditions | |
Characteristics | Limits | ||
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Power reference | 1 mW | Internal 50 MHz oscillator | |
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| factory set to ±0.4% traceable to | |
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| National Physical Laboratory | |
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| (NPL), UK. | |
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Power reference | ±0.1% | Guardbanded Test Line Limits. | |
accuracy setting |
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Power reference | ±0.5% | Worst case power meter | |
accuracy after | (23 ±3oC) | accuracy, taking into account | |
2 years |
| the possibility of oscillator drift | |
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| and operation at 55 degrees. | |
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| Description |
| This test verifies the power level accuracy of the internal 50 MHz |
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| 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). Refer to Appendix B for the measurement uncertainty of the |
| system. |
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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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Agilent E4418B/E4419B Service Guide |
