Agilent Technologies N1911A Manual do Utilizador descarregar pdf (Página 7)

Comparison of 1-way and 2-way

External Triggering

In 1-way or 2-way external trigger measurement, measurement data is stored in the buffer

and the FETCH? command is used to retrieve all the buffered readings at one time. While this

method for obtaining data requires more programming or coding, it provides faster measure-

ment speed. One-way external triggering requires proper dwell time for the signal generator in

order to let the power meter measurement settled before the signal generator proceeds to next

frequency point. This extends measurement speed due to the dwell time.

Table 5. Pros and cons of conventional, 1-way and 2-way external triggering frequency/power sweep

measurement

Method Pros Cons

Conventional Less programming/coding Longer test time

1-way external

triggering

Faster test time than

conventional method

More programming/coding.

Requires dwell/wait time for

signal generator

2-way external

triggering

Faster test time than 1-way

external triggering method.

No dwell/wait time for signal

generator and power meter

More programming/coding

Conclusion

With the new enhanced P-Series power meter firmware with external triggering in CW mode,

the measurement test time can be shortened significantly. Speed improvement is noticeable,

especially when there are multiple instruments in a system controlled by a single controller.

This new measurement alternative allows power measurements speed to be optimized to pro-

duce a reliable result and meet throughput requirements without incurring any additional cost.

References

Maximizing Measurement Speed using P-Series Power Meter - Application Note

Literature number 5989-7678EN

Practices to Optimize Power Meter/Sensor Measurement Speed and Shorten

Test Times - Application Note, Literature number 5990-8471EN

1 2 3 4 5 6 7 8

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