Optimizing Measurement Accuracy

Nov. 12, 2009
The ability to achieve level accuracy that provides meaningful measurement results depends on external leveling techniques that correct for mismatches and frequency-response variations.

The ability to achieve level accuracy that provides meaningful measurement results depends on external leveling techniques that correct for mismatches and frequency- response variations. In most cases, a combination of static and dynamic leveling is the most effective approach.

Static leveling relies on an array of usercreated calibration factors that ensure the delivery of flat power at an interface beyond the signal generator’s RF output connector. The calibration array can be generated by a power meter under the control of the signal generator. The two instruments step through a list of key frequencies, generating and measuring the associated power levels. The signal generator interpolates values for in-between frequencies.

External dynamic leveling uses either a power meter or a crystal diode detector. The key difference is a tradeoff between speed and accuracy. The power-meter-based approach is more accurate, while the diodebased approach is faster.

Working in concert, the static flatness correction removes frequency-response errors, including those from the coupler and diode detector. The dynamic leveling will correct for mismatches that vary with frequency and signal level.

Sponsored Recommendations

Highly Integrated 20A Digital Power Module for High Current Applications

March 20, 2024
Renesas latest power module delivers the highest efficiency (up to 94% peak) and fast time-to-market solution in an extremely small footprint. The RRM12120 is ideal for space...

Empowering Innovation: Your Power Partner for Tomorrow's Challenges

March 20, 2024
Discover how innovation, quality, and reliability are embedded into every aspect of Renesas' power products.

Article: Meeting the challenges of power conversion in e-bikes

March 18, 2024
Managing electrical noise in a compact and lightweight vehicle is a perpetual obstacle

Power modules provide high-efficiency conversion between 400V and 800V systems for electric vehicles

March 18, 2024
Porsche, Hyundai and GMC all are converting 400 – 800V today in very different ways. Learn more about how power modules stack up to these discrete designs.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!