Testing Performance
2
7000 Series Oscilloscopes Service Guide
37
7
When you are finished checking all of the voltage values,
disconnect the oscilloscope calibrator from the
oscilloscope.
8
Repeat this procedure for the remaining channels to be
tested.
Figure 4
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 shorting cap at the oscilloscope
channel input to shunt the noise to ground. See
Figure 4
. If a BNC capacitor is not available,
use an SMA blocking capacitor, adapter, and cap. See
“Blocking capacitor and shorting cap”
in
the equipment list on
page 23
for details.
To oscilloscope input
BNC shorting
cap
Blocking
Capacitor
