Agilent Technologies 1141A, 1142A

Calibration Tests and Adjustment

dc Gain Accuracy

Figure 2-3

Signal to - input

10 Calculate probe gain as

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

To pass this test, the probe gain = 0.98 to 1.02

NOTE Failure of the gain accuracy test can be caused by mis-adjustment of the probe. Perform

the Probe Adjustment procedure in the Adjustments section later in this chapter and

retest.

10x Attenuator Accuracy Test

NOTE If the gain test for the probe fails, the 10x Attenuator Accuracy Test will fail or the

results will be poor. Do not continue until the probe passes the dc gain test.

1Disconnect the probe from the test board and connect the 10x attenuator

adapter to the probe.

2Carefully connect the input of the probe/attenuator to the test board in the

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

∆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 !