GW Instek GDS-200 Series User Manual - Manual (Page 155)

OPERATION
155
Attenuation Calculator
Background The attenuation calculator calculates the
resistor values of 5 common attenuator circuits.
The only input required is the attenuation
required (dB), the system impedance (Z
0
) and
the resistor accuracy (Standard E6 - E192).
Example
Resistor
standard
Desired
attenuation
Attenuator
type
System
impedance Z
0
Low choice
Ideal
resistance
High choice
Find Resistor key
Steps 1. From the EE Apps tray select the Attenuation
Calculator icon.
2. In the ATT field enter the attenuation required
in dB.
3. In the Z
0
field input the system impedance in
ohms. This value is typically 50Ω.
4. Select the type of attenuator circuit.
Circuit: Pi Type, T Type, Bridged-T Type,
Reflection Type, Balanced Type