Question T7D07
From subelement T7 - T7D
Which of the following measurements are made using a multimeter?
Why is this correct?
Multimeters combine three basic measurement functions: voltmeter (measures voltage), ammeter (measures current), and ohmmeter (measures resistance). The correct answer includes two of these core functions that every multimeter can perform. Signal strength and noise require specialized RF instruments, while impedance and reactance measurements need more advanced equipment than basic multimeters provide.
Memory tip
Remember the name: 'multi-meter' literally means multiple measurements in one device. Focus on the three fundamental electrical quantities that define any DC circuit: voltage, current, and resistance. These correspond to the three basic meter functions every multimeter contains.
Learn more
In practical amateur radio operation, your multimeter serves as your primary diagnostic tool for station troubleshooting. You'll use the voltage function to verify power supply outputs and check for proper DC voltages at various circuit points. The resistance function helps identify open circuits, short circuits, or component failures. These measurements align with Ohm's Law calculations (V=IR) that govern all DC circuit analysis in your station equipment.
Think about it
Why do you think multimeters focus on these three specific electrical quantities rather than including RF measurements like SWR or signal strength?