Multimeter Symbols You Need to Know Voltage. Multimeters can measure direct current (DC) voltage and alternating current (AC) voltage, so they need to display more than one voltage symbol.

Voltage Symbols. Voltage is the pressure that allows electrons to flow from a source and is supplied in both DC (direct ...

The ideal symbol separations are ES1 = ES2 = 1/3. One of the PAM4's complications is the possibility of amplitude compression: the variation in the voltage (or power) swing between adjacent symbols.