Agilent Technologies 1141A, 1142A Adjustment Procedure

42

Calibration Tests and Adjustment

Adjustment Procedure

6As shown in the figure below, use the grounding screw to reinstall the ground

block on the PC assembly.

Figure 2-13

Attaching Ground Block to Probe PC Assembly

The ground block provides a mechanical and electrical connection when the probe PC

assembly is connected to the test board.

7Connect the probe power connector to the PROBE connection on the rear of

the 1142A Probe Control and Power Module.

8Connect the mains power to the 1142A.

9Set the 1142A front panel switches to Local and Zero offset.

Adjustment Procedure

Unless specified elsewhere, the procedures must be followed in the order given.

The only adjustment which may be done separately is HF COMP, the high-frequency

compensation.

HF Gain and HF CMRR

This adjustment sequence adjusts the HF Gain for unity gain at 500 kHz and the HF

CMRR for minimum with a 500 kHz common mode signal.

1Set up the function generator.

• Sine wave

• 500 kHz

•600 mV

p-p

2Use BNC cables to connect the function generator to the oscilloscope.

• Generator OUTPUT to oscilloscope channel 1 input

• Generator TRIG OUTPUT to oscilloscope EXT TRIG

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 !