Agilent Technologies 5000 Series - Figure 2. Using a Blocking Capacitor to Reduce Noise

Testing Performance 2
5000 Series Oscilloscopes Service Guide 27
7 When you are finished checking all of the voltage values,
disconnect the oscilloscope calibrator from the oscilloscope.
8 Record the results as Pass or Fail in the Performance Test
Record (see page 48).
9 Repeat this procedure for the remaining channels to be
tested.
Figure 2 Using a Blocking Capacitor to Reduce Noise
Use a Blocking Capacitor to Reduce Noise
On the more sensitive ranges, such as 2 mV/div and 5 mV/div, noise may be a factor. To
eliminate the noise, add a BNC Tee, blocking capacitor, and BNC shorting cap at the
oscilloscope channel input to shunt the noise to ground. See Figure 2.
To oscilloscope input
BNC shorting
cap
Blocking
Capacitor