Agilent Technologies e4419b Power Reference Level Test, Description, Electrical, Performance

Performance Tests

Power Reference Level Test

Power Reference Level Test

Electrical	Performance	Conditions
Characteristics	Limits
Power reference	1 mW	Internal 50 MHz oscillator
		factory set to ±0.4% traceable to
		National Physical Laboratory
		(NPL), UK.
Power reference	±0.1%	Guardbanded Test Line Limits.
accuracy setting
Power reference	±0.5%	Worst case power meter
accuracy after	(23 ±3oC)	accuracy, taking into account
2 years		the possibility of oscillator drift
		and operation at 55 degrees.

	Description
	This test verifies the power level accuracy of the internal 50 MHz
	oscillator—also called the power reference oscillator. 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). Refer to Appendix B for the measurement uncertainty of the
	system.
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%.

Agilent E4418B/E4419B Service Guide 2-15