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Agilent Technologies 1141A, 1142A Vout Vin, --------------Vout1Vout2, ----------------------------------=, , () 2 Vin

1 90

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Calibration Tests and Adjustment

dc Gain Accuracy

Figure 2-4

Signal to + input

3Set the dc calibrator output 3 V dc.

4Record the Vin1 measurement from the top DVM in figure 2-2.

5Record the Vout1 measurement from the bottom DVM in figure 2-2

6Carefully connect the input of the probe/attenuator to the test board in the

position shown in the figure below (signal to - input).

Figure 2-5

Signal to - input

7Record the Vout2 measurement from the bottom DVM in figure 2-2.

8Calculate the 10x attenuator gain as

Record the result of this calculation in the “Calibration Test Record” on page 39.

NOTE Failure of the accuracy test for the 10x attenuator can be caused by mis-adjustment of

the low-frequency CMRR (LF CMRR) adjustment. Perform the Attenuator Adapter

Adjustment procedure in the Adjustments section later in this chapter then retest the

attenuator adapter. If if continues to fail, repair is necessary.

∆Vout∆Vin--------------Vout1Vout2–()

2Vin1

×----------------------------------=

Contents

Main Agilent Technologies 1141A Differential Probe and 1142A Probe Control and Power Module Page Contents Page Introduction Accessories Supplied Page Accessories Available The following accessories can be ordered. To inspect the probe To inspect the probe Using the probe with other instruments Recommended Test Equipment Setting up the probe Initial Adjustment Page Using the Accessories Page Page Page Page Grounding Coupling Functions Page Page Remote operation Cleaning Requirements Differential Amplifiers and CMRR Page Page Equipment Required Introduction Equipment Required The Test Board The Test Board Calibration Tests dc Gain Accuracy dc Gain Accuracy Page Page Vout Vin --------------Vout1Vout2 ----------------------------------= () 2 Vin Page Page Bandwidth Page CMRR Test Page Page Calibration Test Record Probe Adjustment Adjustments Probe Adjustment Page Adjustment Procedure Page Page Page Page Page Adjustment Procedure Attenuator Adapter Adjustment Attenuator Adapter Adjustment Page Page Page Page Introduction Performance Specifications and Characteristics Performance Specifications and Characteristics Page Page General Characteristics General Characteristics Theory of Operation Theory of Operation Differential Probe Control and Power Module Theory of Operation Attenuator Adapters Page Service Policy Troubleshooting Probe Troubleshooting Probe Control and Power Module Troubleshooting Page Removing and Replacing Assemblies Differential Probe Page Probe Adapters Page Probe Control and Power Module Replaceable Parts Parts List Ordering Information Direct Mail Order System Manufacturers Codes Page Page Page Page Page Page 1141A and 1142A Replaceable Parts Page Page Page Page Page Locator Table for Control and Power Supply Page Page Index Agilent Technologies P.O. Box 2197 1900 Garden of the Gods Road Notices Manual Part Number Warranty Technology Licenses Restricted Rights Legend Product Safety Notices Warnings To clean the instrument Safety Symbols !