Agilent Technologies 34901A User Manual page 390

Chapter 8 Tutorial
Actuators and General-Purpose Switching
Using Attenuators
Provisions have been made on the 34903A circuit board for installing
simple attenuators or filter networks. An attenuator is composed of two
resistors that act as a voltage divider. A typical attenuator circuit is
shown below.
V
att
To select the attenuator components, use the following equation:
V = V
att signal
One typical use for the shunt component is with 4 to 20 mA transducers.
Ω ±
A 50 , 1%, 0.5 watt resistor can be installed in the R2 location.
The resultant voltage drop (transducer current through the resistor)
can be measured by the internal DMM . Thus, the 50
the 4 to 20 mA current to a 0.2 to 1 volt signal.
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R1
HI
LO
R2
R
2
x
+
R R
1 2
V
signal
Ω
resistor converts
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