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Agilent Technologies 1142A User Manual
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Agilent Technologies 1142A User Manual

Probe control and power module
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See also: User Manual and Service Information , User and Service Manual
Agilent 1142A
Probe Control and
Power Module
User's Guide
Agilent Technologies

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Summary of Contents for Agilent Technologies 1142A

  • Page 1 Agilent 1142A Probe Control and Power Module User’s Guide Agilent Technologies...
  • Page 2 Notices Technology Licenses Safety Notices © Agilent Technologies, Inc. 2000 – 2014 The hardware and/or software described in CAUTION. A CAUTION notice this document are furnished under a license No part of this manual may be reproduced in denotes a hazard. It calls attention to...

  • Page 3: Table Of Contents

    Service Replaceable Parts Contacting Agilent The 1142A supplies two sets of positive and negative voltages for use by active probes. For the 1141A probe it also supplies an offset current. Refer to the 1141A Differential Probe and 1142A Probe Control and Power Module User and Service Guide for more information.
  • Page 4 This manual contains information for use and service of the 1142A by itself. It covers use of the 1142A as a power supply only and service of the instrument in general. Use of the offset controls is covered in the probe or oscilloscope manual.

  • Page 5: Using The 1142A

    Using the 1142A This section of the manual contains information and instructions for installation and use of the 1142A Probe Control and Power Module as an auxiliary power supply. Use of probe controls is covered in the guide for the probe.
  • Page 6 1142A Probe Control and Power Module Using the 1142A Checking the Power The power module requires a power source of either 115 Vac Requirements and Fuse or 230 Vac, 47 to 440 Hz, 25VA maximum. CAUTION BEFORE CONNECTING POIWER TO THIS INSTRUMENT, be sure the line voltage select switch on the instrument’s rear...
  • Page 7 The type of power cable plug shipped with the instrument depends on the country of destination. The 1142A has no power switch. It is not required because of the low mains power requirement. To Clean the Instrument If the 1142A requires cleaning, perform the following steps: Remove power from the instrument.

  • Page 8: Safety Information

    1142A Probe Control and Power Module Safety Information Safety Information The following general safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precautions or with specific warnings or operating instructions in the product manuals violates safety standards of design, manufacture, and intended use of the instrument.
  • Page 9 1142A Probe Control and Power Module Safety Information General Do not use this product in any manner not specified by the manufacturer. The protective features of this product may be impaired if it is used in a manner not specified in the operation instructions.
  • Page 10 1142A Probe Control and Power Module Safety Information WARNING Service instructions are for trained service personnel. To avoid dangerous electric shock, do not perform any service unless qualified to do so. Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.

  • Page 11: Performance Test

    Performance Test Performance Test This section documents the Output Voltages Performance Test which tests the electrical performance of the 1142A. There are no service adjustments. The performance test procedures may be performed for incoming inspection of the instrument and should be performed periodically thereafter to ensure and maintain peak performance.
  • Page 12 1142A Probe Control and Power Module Performance Test Table 2 Voltage Outputs on Rear-Panel Connector Connector Voltage LF Signal Offset Out –15V Offset Common +15V Power Common –6V...

  • Page 13: Specifications And Characteristics

    1142A Probe Control and Power Module Specifications and Characteristics Specifications and Characteristics There are no specifications for the 1142A Probe Control and Power module as a stand- alone instrument. As it is designed to be used specifically with certain active probes, its characteristics are coupled with the performance of the probe.
  • Page 14 1142A Probe Control and Power Module Specifications and Characteristics Table 4 Power Requirements Item Specification Voltage 115/230 Vac, 47 to 440 Hz Power 25 VA maximum Table 5 Weight Item Specification 1.8 kg (4.0 lb) Shipping approximately 2.7 kg (6.0 lb)

  • Page 15: Service

    When a faulty assembly has been located, the disassembly/assembly procedures help direct replacement of the assembly. The service policy for the 1142A Probe Control and Power Module is component- level repair. Safety Read the “Safety Information”...
  • Page 16 A complete parts list, component location, and schematics are provided later in this chapter. Theory of Operation The following discussion covers block- level theory for the 1142A Probe Control and Power Module. The control and power module provides offset functions, local and remote control, and power to an 1141A Differential Probe.
  • Page 17 1142A Probe Control and Power Module Service Figure 5 A1 Control and Power Module Block Diagram Front panel screwdriver adjustment Offset Null zeros the dc output from the probe when the dc input and offset are zero. For dc Reject, an output from the low- frequency amplifier in the probe (LFSIG) is used to develop a voltage used to null the dc component of the input signal.
  • Page 18 1142A Probe Control and Power Module Service Local and Remote Control The front panel switch controls the dc reject and offset functions. It also selects remote operation, which allows control through the rear panel remote input connector. Power Supply The power supply provides ±6V and ±15V for the probe and analog control circuitry as well as +5V for the digital control circuitry.

  • Page 19: Replaceable Parts

    Replaceable Parts Replaceable Parts This section contains information for ordering parts. Service support for the 1142A is to the component level. Ordering Information To order a part in the material list, quote the part number, indicate the quantity desired, and address the order to the nearest Agilent Technologies Sales Office.
  • Page 20 1142A Probe Control and Power Module Replaceable Parts Manufacturers' Codes A list of manufacturers' codes is given in Table 6 on page 20. The codes are given for parts in the parts lists. The table gives the manufacturer and address for each code.
  • Page 21 1142A Probe Control and Power Module Replaceable Parts Table 7 1142A Replaceable Parts Part Mfr. Part Ref.Des. Number Description Mfr.Code Number 01142-66501 PC ASSEMBLY-POWER AND CONTROL 28480 01142-66501 0515-0374 SCREW-MACHINE M3 10MM-LG 00000 ORDER BY DESCRIP. 0515-1031 SCREW-MACH M3 6MM-LG 90-DEG-FLH-HD 00000 ORDER BY DESCRIP.
  • Page 22 1142A Probe Control and Power Module Replaceable Parts Table 8 A1 Power Supply PC Replaceable Parts (Sheet 1 of 4) Part Mfr. Mfr. Part Ref.Des. Number Description Code Number 0160-6190 CAPACITOR-FXD 0.33UF +-10% 50VDC 28480 0160-6190 0160-5474 CAPACITOR-FXD 0.1UF +-5% 100VDC MET-POLY...
  • Page 23 1142A Probe Control and Power Module Replaceable Parts Table 8 A1 Power Supply PC Replaceable Parts (Sheet 2 of 4) Part Mfr. Mfr. Part Ref.Des. Number Description Code Number NOT ASSIGNED 1901-0731 DIODE-PWR RECT 400V 1A 28480 1901-0731 1901-0731 DIODE-PWR RECT 400V 1A...
  • Page 24 1142A Probe Control and Power Module Replaceable Parts Table 8 A1 Power Supply PC Replaceable Parts (Sheet 3 of 4) Part Mfr. Mfr. Part Ref.Des. Number Description Code Number R1-2 NOT ASSIGNED 0757-0442 RESISTOR 10K 1% 0.125W TF TC=0+-100 24546...
  • Page 25 1142A Probe Control and Power Module Replaceable Parts Table 8 A1 Power Supply PC Replaceable Parts (Sheet 4 of 4) Part Mfr. Mfr. Part Ref.Des. Number Description Code Number 0757-0460 RESISTOR 61.9K 1% 0.125W TF TC=0+-100 24546 CT4-1/8-T0-6192-F R33-39 NOT ASSIGNED 0757-0123 RESISTOR 34.8K 1% 0.125W TF TC=0+-100...
  • Page 26 1142A Probe Control and Power Module Replaceable Parts Table 9 Component Location on A1 Assembly Grid Grid Grid Grid Grid Grid Grid Grid CR10 CR11 CR12 CR13 CR14 CR17 CR18...
  • Page 27 1142A Probe Control and Power Module Replaceable Parts Figure 6 A1 Power and Control Assembly...
  • Page 28 1142A Probe Control and Power Module Replaceable Parts Schematics Schematics are sequentially numbered in the figure title at the bottom of the page. Schematic numbers are used to cross reference signal connections between the schematics. Table 11 on page 30 lists the power connections, power grounds,...
  • Page 29 1142A Probe Control and Power Module Replaceable Parts Figure 7 Schematic 1...
  • Page 30 1142A Probe Control and Power Module Replaceable Parts Figure 8 Schematic 2 Table 11 IC Connections Not Shown (for Figure 7) Supply Pin Number IC Group +15V –15V +15V U6 - 8, 11 –15V 1, 5, 8...
  • Page 31 1142A Probe Control and Power Module Replaceable Parts Figure 9 Schematic 3...

  • Page 32: Contacting Agilent

    1142A Probe Control and Power Module Contacting Agilent Contacting Agilent Agilent Technologies contact information can be found at: www.agilent.com/find/contactus When returning the product, observe the following tips: ■ Write the following information on a tag and attach it to the power supply.
  • Page 33 1142A Probe Control and Power Module...
  • Page 34 Manual Part Number 01142-97003 *01142-97003* Agilent Technologies Printed in Malaysia, August 2014...