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Frequently Asked Questions
This section helps our customers understand Load Pull and Noise Measurements! As such, we’ve put together a selection of typical Questions and Answers.
We are updating this section as new applications and instruments appear and we will be happy to receive your questions and answer them.
This section includes three sections per the main tuner applications:
LOAD PULL, NOISE and TUNER/CALIBRATION.
Useful Formulas and a set of Graphs are also available.
LOAD PULL
What is a Load Pull Setup?
What are Load Pull Measurements?
Basic Notions about Noise and Load-Pull
Does Load Pull without Harmonic tuners make sense?
Tuner Power Handling Limitations
Hybrid Harmonic LP and wideband Tuners
Active Load Pull: Strength & Weaknesses
Measure Zin (DUT) using a passive Load Pull System
Power Added Efficiency
Limitations of a Load Pull System
What are Impedance Errors in Multitone (Intermod) Measurements?
Why do Triplexers cause spurious Oscillations
Attention with Isolators
NOISE
TUNER / CALIBRATION
Calibration Definitions
How does a Slide Screw Tuner (Frequency>100MHz) work?
Input Power Calibration for avoiding input Isolator
Contacting versus Non-contacting Tuner Probes (Slugs)
The TRL Calibration Method
Tuner Repeatability is affected by VNA Jitter
Comparing Contacting and Non-Contacting RF probes (Slugs)
Attention with Isolators
Electronic and Mechanical Tuners
How do we Interpolate between Impedance points?
What is Tuner Loss?