Agilent Technologies 1141A, Руководство пользователя и сервисное руководство

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Calibrating the Probe 2
dc Gain Accuracy
1141A and 1142A User’s Guide 29
dc Gain Accuracy
This test checks the dc gain accuracy of the differential probe and
the dc accuracy of the differential probe with attenuator and adapters.
Specification: Probe alone, ±2%; with attenuator adapter, ±4%
Procedure
1
Connect the probe and test equipment as shown in Figure 11 on
page 30.
2 Set up the 1142A probe control and power module as follows. Set
the Local/Remote push button to Local. Under DC Couple, press
the Zero offset button.
3 With the 1141A Probe Amp disconnected from the test PCA, adjust
the Offset Null control on the 1142A until the DVM reads 0 Vdc. If
the probe output voltage cannot be set to 0V, subtract this voltage
from the subsequent measurements in this test.
4
Connect the input of the Probe Amp to the test board in the
position shown in
Figure 12 .
Table 6 Equipment Required
Equipment
Required
Critical Specifications
Recommended
Agilent
Model/Part
ac/dc Calibrator
or
dc Power Supply 100 mV to 7 V
100 mV to 7 V
E3632A
DVM 0.5% accuracy, 10 µV resolution 3458A or E34401A
Load BNC feed-through, 50
Ω
Pasternack
Enterprises
PE6008-50 or
Huber+Suhner
22543742
Cables (2) BNC 50
Ω
10503A
Adapters (2) BNC (f) to dual banana (m) 1251-2277
Test Board No substitute 01141-66514