An analog RF wattmeter provides the most...

🔍 Key Concepts

• How analog RF wattmeters (and other analog meters) are calibrated and where their scale linearity is best • How closely spaced scale markings affect your ability to read small changes in pointer position • Why the extremes (very low and very high ends) of a mechanical meter’s scale can introduce more error

💭 Think About

• On which part of the scale can you most clearly distinguish small differences between two nearby readings? • Where is the mechanical movement of the needle most predictable and linear on a spring/coil type movement? • If you were trying to take a precise reading, would you trust the needle pressed against a stop, barely off zero, or somewhere in between?

✅ Before You Answer

• Think about scale spacing – where are the divisions easiest to see and estimate fractions between marks? • Consider mechanical limits – what happens to accuracy when the pointer is very close to zero or near the full-scale stop? • Recall that many analog meters are specified for best accuracy within a certain percentage of full scale, not at the very ends.

An analog RF wattmeter provides the most accurate reading:

At the middle one third of the dial.

At the lower one third of the dial.

At the upper one third of the dial.

The accuracy is uniform the whole scale.

🔍 Key Concepts

💭 Think About

✅ Before You Answer