Tektronix P7313SMA, Техническое описание

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Performance Veri fi cation
DC Gain Accuracy
This test checks the DC gain accuracy of the probe at the two attenuation settings, 2.5X and 12.5X.
Gain Check at 2.5X Attenuation
1. Set the attenuation on the probe to 2.5X, and the termination select to Auto.
2. Connect the probe to the power supplies as shown. (See Figure 27.) Make sure the ground tabs on the BNC-to-dual
banana plug adapters are connected to the ground connections on the power supplies. Monitor the source voltage with
one of the DMMs.
Figure 27: DC Gain Accuracy setup
3. Set the voltage on each power supply to approxi0.160 V (+0.32 V differential total). This represents 80% of the
probe dynamic range in this attenuation setting. Record this source voltage as V
in
1.
4. Record the output voltage (on the second DMM) as V
out
1.
5. Disconnect the BNC-to-dual banana plug adapters from the power supplies. Leave the DMM leads connected to
the adapters.
6. Connect the BNC-to-dual banana plug adapters into the opposite power supplies to reverse the voltage polarity to the
probe inputs. (See Figure 28 on page 41.)
7. Record the actual source voltage (now a negative value), as V
in
2.
40 P7313SMA Technical Reference