Agilent Technologies 1141A, 1142A CMRR Test

Calibration Tests and Adjustment

CMRR Test

CMRR Test

This test checks the CMRR at 1 MHz and 100 MHz.

Specification 3000:1 at 1 MHz, 10:1 at 100 MHz

Equipment Required

Procedure

1Connect the probe power connector to the PROBE connection on the rear of

the 1142A Probe Control and Power Module.

2Set the 1142A front panel switches to Local and Zero offset.

3Connect the probe output to the oscilloscope channel 1 input.

4Connect the input of the probe to the test board in the position shown in the

figure below (signal to + input).

Figure 2-9

Signal to + input

5Connect the signal generator to the test board.

6Set the signal generator for 1 MHz at 385 mVrms (1 Vp-p).

Equipment

Required Critical Specifications

Recommended

Agilent

Model/Part

Oscilloscope 400 MHz bandwidth at 1 mV/div 54830B

Signal Generator 1-100 MHz at = 400 mVrms 8648A

Test Board No substitute 01141-66504

Cable Type N (m) 24-inch 11500B

Adapter Type N (f) to BNC (m) 1250-0077

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 !