Agilent 1141A - Manual

Agilent 1141A

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Table of Contents:

  • Page 3 – Contents; Operating the Probe; Calibration Tests; Service; Introduction
  • Page 4 – Theory of Operation
  • Page 5 – Operating the Probe
  • Page 6 – Accessories Supplied; Item
  • Page 8 – Accessories Available; The following accessories can be ordered.
  • Page 9 – To inspect the probe; Recommended Test Equipment; Signal Generator; Function Generator
  • Page 10 – Setting up the probe; Power Requirements
  • Page 11 – W A R N I N G; If the oscilloscope does not have a selectable 50; Initial Adjustment
  • Page 12 – Equipment Needed; The following equipment is necessary for initial adjustment.; • 5 V power supply; termination on the test board.; Use the probe setup procedure to set up the probe system.
  • Page 13 – Set the Local/Remote push button to Local.; Set the power supply output to 5 V.; Warm up the 1141A for 30 minutes before making adjustments.; Using the Accessories
  • Page 14 – Probe Tips; the extension leads to the probe.
  • Page 15 – N o t e; • Connect the leads at right angles to the circuitry under test.; Remove the probe tip caps and tips.
  • Page 16 – Adapters
  • Page 17 – Adapter Combinations
  • Page 18 – Connector Compatibility; Grounding; Coupling Functions
  • Page 19 – Probe System Coupling Functions; The key characteristics are:; dc offset
  • Page 20 – Remove the ac adapter if it is installed.; C A U T I O N
  • Page 21 – On the 1142A, press Local and Zero offset.; Remote operation; The following table gives the connections.
  • Page 22 – Function Select; Cleaning Requirements; Hz Reject
  • Page 23 – Differential Amplifiers and CMRR; The following things can affect the effective CMRR of a test setup:
  • Page 25 – Calibration Tests and Adjustment
  • Page 26 – Equipment Required; termination (two 100; The power rating of the 50
  • Page 27 – The Test Board; Testing Interval; Procedures may be done individually or in any order.; N O T E
  • Page 28 – dc Gain Accuracy; DVM
  • Page 30 – Calculate probe gain as; o u t
  • Page 32 – 00x Attenuator Accuracy Test
  • Page 33 – Record the V
  • Page 34 – Bandwidth; Specification
  • Page 35 – Reconfigure the equipment.
  • Page 36 – CMRR Test; This test checks the CMRR at 1 MHz and 100 MHz.; Critical Specifications
  • Page 37 – Disconnect the probe amp from the test board and measure V; on; TIMEBASE
  • Page 38 – CMRR
  • Page 39 – Calibration Test Record; Recommended Test Interval - 1 Year/2000 hours
  • Page 40 – Adjustments; Adjustment Interval; Probe Adjustment; Do these adjustment procedures in an ESD-safe area.
  • Page 41 – Handle the PC assembly by the edges of the PC board.
  • Page 42 – Connect the mains power to the 1142A.; Adjustment Procedure; HF Gain and HF CMRR; • Sine wave
  • Page 43 – Connect the output of the probe to the channel 1 input.
  • Page 44 – Adjust R9, HF GAIN so the V; Set the function generator output to 1.0 V; • Square wave
  • Page 45 – Change the oscilloscope settings to:; Menu
  • Page 46 – Change the function generator settings to:
  • Page 47 – High Frequency Compensation; , or as close to that as possible. Adjust slowly and press; The minimum allowable amplitude is 212 mV; Probe Reassembly
  • Page 48 – Assemble the PC assembly in the top cover.; Position the ground block at the center-front of the PC assembly.; Replace the bottom cover.; Close the two covers together and fasten with the probe clamp ring.
  • Page 49 – Attenuator Adapter Adjustment; • If an adapter is suspected of needing adjustment.
  • Page 50 – Set up the oscilloscope, then set the following parameters.
  • Page 51 – Change the function generator to 10 V
  • Page 53 – Service
  • Page 55 – Performance Specifications and Characteristics
  • Page 56 – Legend; CMRR specification for probe with no input adapters.
  • Page 57 – Input voltage limits for probe alone.
  • Page 58 – General Characteristics; Refer to the outline drawings below.
  • Page 60 – Differential Probe; input impedance for the probe. The LOW FREQ BANDWIDTH; Summing Amp; Control and Power Module
  • Page 61 – Offset Functions; Attenuator Adapters
  • Page 62 – Test Board
  • Page 63 – Service Policy
  • Page 64 – Troubleshooting; Probe Troubleshooting; To troubleshoot the probe:; Apply a known signal to the input of the probe.
  • Page 66 – Removing and Replacing Assemblies; Remove the ground screw on the top of the probe.; Disconnect the cable connector from the probe PC board.
  • Page 67 – Reassemble Probe; Position the ground block at the front of the PC assembly.
  • Page 68 – Probe Adapters; Disassemble Adapter; Reassemble Adapter
  • Page 70 – Probe Control and Power Module; • Three directly on the PC board.; Reverse the procedure to reassemble the control and power supply.
  • Page 71 – Replaceable Parts; Parts List; • Reference designator; Ordering Information
  • Page 72 – Manufacturers’ Codes; Manufacturers’ Code List; Name; Any satisfactory supplier
  • Page 73 – Exploded View
  • Page 76 – IC Connectors not Shown; GND
  • Page 79 – PC ASSEMBLY-POWER AND CONTROL
  • Page 80 – Prefix the reference designators with A1
  • Page 83 – NOT ASSIGNED; Power Supply Replaceable Parts
  • Page 84 – RESISTOR NETWORK
  • Page 87 – Index; Numerics
  • Page 89 – Notices; Manual Part Number; Warranty
  • Page 90 – Warnings; To clean the instrument
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User and Service Guide

Publication number 01141-97002
July 2004

For Safety and Regulatory information, see the pages at the end
of this book.

©

Copyright Agilent Technologies 2000-2004

All Rights Reserved

Agilent Technologies 1141A
Differential Probe and 1142A
Probe Control and Power
Module

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Summary

Page 3 - Contents; Operating the Probe; Calibration Tests; Service; Introduction

Contents 3 1 Operating the Probe Accessories Supplied 6 Accessories Available 8 To inspect the probe 9 Using the probe with other instruments 9 Recommended Test Equipment 9 2 Calibration Tests and Adjustment Equipment Required 26 The Test Board 26 Calibration Tests 27 dc Gain Accuracy 28 Bandwidth 3...

Page 4 - Theory of Operation

4 Contents Theory of Operation 59 Differential Probe 60 Control and Power Module 60 Attenuator Adapters 61 Test Board 62 Service Policy 63 Troubleshooting 64 Probe Troubleshooting 64 Probe Control and Power Module Troubleshooting 64 Removing and Replacing Assemblies 66 Differential Probe 66 Probe Ad...

Page 5 - Operating the Probe

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