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LOW-LEVEL POWER MEASUREMENT
TECHNIQUES AND ACCURACY
STEVE WHITACRE. DEE HUMPHERYS
RF & Microwave
Measurement
Symposium
and
Exhibition
www.HPARCHIVE.com
LOW-LEVEL POWER MEASUREMENT
TECHNIQUES AND ACCURACY
AGENDA
1. Power Measurement Techniques
2. RangelAccuracy Constraints
3. AccuracyIMeasurement Example
(Constant SWR Source)
4. Mismatch Uncertainty
5. Extended Frequency Range
1236
Low Level Power Measurement
Techniques and Accuracy
1206B
www.HPARCHIVE.com
Slide 2
This paper will discuss the accuracy considerations of
Applications for Low Level power measurement techniques that provide both high
accuracy and wide dynamic range. Two specific appli-
Power Measurements cations of this technique are signal generator level cali-
Signal Generator Calibration bration and attenuation measurements.
RF Frequency Countor Signal generator calibration generally requires high per-
Signal Gonorator f--------1~
Modulotlon Anolyzer formance measurement equipment to verify the modu-
Dlatortlon Anolyzor
Audio Frequoncy Counter
lation, frequency, and output level performance. Output
- 127 dBm Wldo Dynamic Rango Power Metor level performance has typically been the most difficult
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