Figure 4-2 High Frequency Power Measurement - Keysight V3500A User Manual

4 RF Measurement Basics
86
resistance). This effectively replaces the circuit's load
resistor (R) with the characteristic impedance (Z
to the RF power meter (see
Signal
source

Figure 4-2 High frequency power measurement

RF circuits and systems are usually designed to work with a
standard impedance value called the characteristic
impedance (refer to Z
are designed to work with a load of the same impedance, Z
value for RF circuits is 50 Ω or 75 Ω, with
Generally, the Z
0
50 Ω being the most common. The internal load resistance
of the power meter is designed to equal Z
Figure 4- 2).
Z
0
in Figure 4- 2). Typical signal sources
0
) built- in
0
RF power meter
Power
Measurement
Circuitry
R
.
0
.
0
V3500A User's Guide