Tektronix VX4101 User manual

User Manual
VX4101
DMM/Counter
070-9678-01
This document supports firmware version 1.0
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to the Safety Summary prior to
performing service.

Copyright Tektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or its suppliers and
are protected by United States copyright laws and international treaty provisions.
Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the
Rights in Technical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1) and (2) of the
Commercial Computer Software – Restricted Rights clause at FAR 52.227-19, as applicable.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

WARRANTY
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years
from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either
will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the
defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the
warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for
packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid.
Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the
Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any
other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting
from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair
damage resulting from improper use or connection to incompatible equipment; or c) to service a product that has been
modified or integrated with other products when the effect of such modification or integration increases the time or
difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX
AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

VX4101 DMM/Counter User Manual i
Table of Contents
General Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started
Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Descriptions 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Description 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controls and Indicators 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BIT (Built-in Test) 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VXIplug&play Software 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tools Required 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Requirements and Cautions 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Installation Procedure 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Installation 1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Checklist 1–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Check 1–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operational Check 1–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SYSFAIL* Operation 1–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About the Instrument Drivers 1–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics
Instrument Functions 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Overview 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-on 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument I/O 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VXIbus Basics 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Registers 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VMEbus Interrupt Level Selection 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theory of Operation 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Instrument Subsystem 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Asynchronous Protocol 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Asynchronous Protocol Command Suite Description 2–10. . . . . . . . . . . . . . . . . . . . .
Response Formats 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trigger Commands 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Syntax and Commands
Command Syntax 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IEEE-488.2 Common Commands 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General VX4101 Commands 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCPI Commands for the Digital Multimeter 3–39. . . . . . . . . . . . . . . . . . . .

Table of Contents
ii VX4101 DMM/Counter User Manual
Trigger Commands for the DMM 3–81. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCPI Commands for the Counter 3–91. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trigger Commands for the Counter 3–165. . . . . . . . . . . . . . . . . . . . . . . . . . .
SCPI Commands for the SurePatht Modules 3–185. . . . . . . . . . . . . . . . . . . .
Trigger Commands for the SurePath Modules 3–219. . . . . . . . . . . . . . . . . . .
Status and Events
Status and Event Reporting System 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices
Appendix A: Specifications A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VX4101 General Characteristics A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over Voltage Indication A–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Multimeter (DMM) Specifications A–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Universal Counter Specifications A–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SurePathtSpecifications A–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certfications and Compliances A–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B: Input/Output Connections B–1. . . . . . . . . . . . . . . . . . . . . . . .
Appendix C: Examples C–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the DMM Subsystem C–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using VXIplug&play Driver Function Calls C–7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix D: Calibration D–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration for the DMM D–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Mode Calibration Procedure D–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRMS AC (DC Coupled) Mode Calibrations D–6. . . . . . . . . . . . . . . . . . . . . . . . . . .
Resistance Mode Calibration Procedure D–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current Mode Calibration Procedure D–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration for the Counter D–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix E: Counter Performance Verification Procedure E–1. . . . . . . .
General Information and Conventions E–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required E–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Considerations for Automated Procedures E–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites E–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About the Test Records E–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Records E–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Procedures E–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix F: DMM Performance Verification Procedure F–1. . . . . . . . .
General Information and Conventions F–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required F–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Considerations for Automated Procedures F–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites F–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About the Test Records F–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before You Begin F–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24-Hour Test Records F–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90-Day Verification Test Records F–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
One Year Verification Test Record F–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Procedures F–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
VX4101 DMM/Counter User Manual iii
Appendix G: User Service G–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix H: Replaceable Parts H–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering Information H–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List H–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dressing the Delay Line Cable H–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary and Index

Table of Contents
iv VX4101 DMM/Counter User Manual

VX4101 DMM/Counter User Manual v
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.
Connect and Disconnect Properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Ground the Product. This product is indirectly grounded through the grounding
conductor of the mainframe power cord. To avoid electric shock, the grounding
conductor must be connected to earth ground. Before making connections to the
input or output terminals of the product, ensure that the product is properly
grounded.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and marking on the product. Consult the product manual for further ratings
information before making connections to the product.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/DampConditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
To Avoid Fire or
Personal Injury

General Safety Summary
vi VX4101 DMM/Counter User Manual
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
ProtectiveGround
(Earth)Terminal CAUTION Refer to Manual Double Insulated
WARNING
High Voltage
Symbols and Terms

VX4101 DMM/Counter User Manual vii
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, disconnect the main power by means
of the power cord or, if provided, the power switch.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.

Service Safety Summary
viii VX4101 DMM/Counter User Manual

VX4101 DMM/Counter User Manual ix
Preface
This manual assumes you are familiar with the operation of VXIbus instruments
and with the purpose and function of this instrument.
Please read and follow all instructions for installation and configuration. Use the
Installation Checklist to ensure proper installation and to record your initial
settings.
The Operating Basics section gives a summary of VXIbus operation and
presents an overview of the operation of this instrument.
The Syntax and Commands section provides a summary of all the commands
followed by detailed descriptions of each command. Appendix E: Examples
contains example programs that demonstrate the programmable features of this
instrument.
The Status and Events section contains an explanation of the Status and Event
Reporting System and lists the system messages.
The Reference Guide contains a summary of all the SCPI instrument commands.
Conventions
The names of all switches, controls, and indicators appear in this manual exactly
as they appear on the instrument.
Specific conventions for programming are given in the sections Syntax and
Commands and Appendix E: Examples.

Preface
xVX4101 DMM/Counter User Manual

Getting Started

VX4101 DMM/Counter User Manual 1–1
Product Description
The VX4101 DMM/Counter is a C size single slot VXI instrument for use in a
mainframe conforming to the VXIbus Specification. The VX4101 provides three
of the most common functions needed in a typical VXI system:
Full function 5 1/2 digit Digital Multimeter (DMM)
Full function 2-channel 250 MHz Universal Counter
Scanner master function for the Tektronix SurePathfamily of VXI relay
modules
All instruments are VXI message-based and use command programming syntax
compatible with Standard Commands for Programmable Instruments (SCPI)
1995 and IEEE 488.2. Included with the instrument is a complete VXIplug&play
Win Framework instrument driver.
You can control the VX4101 either by using the VXIplug&play instrument
driver or by issuing SCPI commands. Complete VXIplug&play driver descrip-
tions are described in the help files on the plug&play diskette shipped with the
instrument. A listing of the basic functions appear in About the Instrument
Drivers in this manual.
You can load on-line help files and text files from from the diskette included
with this instrument. Descriptions of the most basic commands you can use with
the VXIplug&play instrument drivers appear in About the Instrument Drivers.
Instrument Descriptions
All instruments on the module are located at a single VXI logical address. You
can access the instruments sequentially in the same manner as multiple instru-
ments in a typical test system. They can be set up sequentially, then triggered
and operated concurrently, with local on-instrument processing and memory for
each function.
Extensive triggering capability is provided between each instrument and the VXI
backplane.
The DMM has full function autoranging with 5 1/2 digit resolution. Measure-
ments can be returned as single measurements, or as an array with up to 4096
measurements via the Fast Data Channel Protocol. Power cycle averaging modes
are available for 60 Hz, and 50 Hz. The autozero and autogain capabilities
minimizes offset and gain drift errors without removing the customer input
Digital Multimeter (DMM)

Product Description
1–2 VX4101 DMM/Counter User Manual
connections. The DMM has floating input isolation of 300 VDC or AC RMS. It
also features programmable aperture time from 1 ms to 2 seconds in 1 ms steps.
Ranges of operation are:
DC voltage at 30 mV, 300 mV, 3 V, 30 V, and 300 V
AC True RMS, either AC or DC coupled, at 30 mVRMS, 300 mVRMS,
3 VRMS, 30 VRMS and 300 VRMS
4-wire or 2-wire Wmeasurement at ranges of 30 W, 300 W, 3 kW, 30 kW,
300 kW, 3 MW, 30 MW, and 300 MW
DC Current at 150 mA and 1A
Acquisition triggering is provided from one of several sources, including VXI
TTL triggers, counter front panel arm, software triggers, periodic trigger, counter
end-of-measurement, and SurePathrelay switched and settled.
The Universal Counter in the VX4101 brings unprecedented performance to VXI
in terms of both speed and resolution. The features include:
Two input channels for frequency, period, rise and fall time, positive and
negative pulse width, frequency ratio, totalizer, time interval, and AC/DC
voltage measurements
Optional 3 GHz prescaler input on channel 3
1 MHz to 250 MHz frequency measurements (500 MHz optional)
Input signal conditioning: x1, x10, x100 attenuation with 0.5 to 10.0 variable
gain and up to 100 V offset depending on attenuation
DC or AC coupling, and 50 Ωor 1-MΩinput (with automatic over current
protection for the 50 Ωmode)
250 ns resolution (1 ps with averaging) and timing measurements from –1 ns
single-shots to 99 day averaging
Measurement gating from one of several sources, including VXI TTL
triggers, counter front panel arm, software triggers, periodic trigger, DMM
end-of-measurement, and SurePathrelay switched and settled.
Channel 2 can be used as a high speed gate for channel 1
Universal Counter

Product Description
VX4101 DMM/Counter User Manual 1–3
The scanner master control supports the functions of the Tektronix SurePath
family of VXI relay modules, such as the VX4320, VX4330, VX4350, and
VX4380. The features of some of the SurePathfamily are as follows:
VX4320 1.3 GHz RF Multiplexer. This module is a single-wide VXIbus module
intended to switch RF and high-frequency digital signals. It is arranged as eight
1 ×4 coaxial switches with a 50 Wcharacteristic impedance. Each 1 ×4 section
has five type SMB male snap-on subminiature coaxial connectors.
VX4330 120-Channel Scanner/Multiplexer. This module provides six 1 ×10 4-wire
multiplexer (mux) sections. Each of these six sections can be independently
configured under software control as two 1 ×10 2-wire mux, a 1 ×20 2-wire
mux, or as a 1 ×40 1-wire mux. In addition, each section can be programmed to
connect it to the section above or below to produce a 1 ×60 4-wire mux,
a 1 ×120 2-wire mux, or a 1 ×240 1-wire mux.
VX4350 64-Channel SPST/SPDT Switching Module. This module provides 64
independent single-pole double-throw relays. A 0 Wresistor is placed in series
with the common contact of each relay. This resistor may be replaced by a
resistor with a larger value to limit the current that flows through the relay in
order to protect the relay contacts. Pads are provided for optional metal oxide
varistors (MOVs). These varistors are connected from the common contact to the
normally closed contact, and from the common contact to the normally open
contact of each relay. Using the optional MOVs protects the relay contacts from
over voltage conditions encountered when switching electrical power to
inductive loads. The optional MOVs and current limiting resistors are user
installed, and are not available as factory options.
VX4351 40–Channel, 10 Amp, SPST Switch Module. This module contains 40 SPST
(form A) relays. Each relay may be controlled independently. The contacts of
each relay are connected to one of three 30-pin high current connectors which are
mounted on the module’s front panel. Circuitry is included on the VX4351 to
verify the control signals that are applied to each relay coil driver.
VX4380 256-Crosspoint Relay Matrix Module. This module provides four 4 ×16
2-wire matrix sections. Each section can be configured to connect either the four
rows or the sixteen columns to the section above or below it to produce up to a
16 ×16 2-wire matrix or a 4 ×64 2-wire matrix.
The VX4101 SurePathMaster provides serial I/O interface for control of
SurePathrelay modules. It also monitors the power fuses of all SurePath
Relay modules, and provides a serial input interface to identify each module that
it controls.
SurePathModules

Product Description
1–4 VX4101 DMM/Counter User Manual
VX4381 4 ×4, 10 Amp, Dual 1-Wire Switch Matrix. This module provides two 4 ×4
single-wire 10 A matrix sections. These sections can be configured to operate as
a single 4 ×4 two-wire matrix.
NOTE. There is a query for the VX4101 which will return a list of the SurePath
family relay modules that the VX4101 SurePathMaster supports.
Physical Description
Figure 1–1 shows the VX4101 switches and fuses, and Figure 1–2 shows the
front panel.
Switches as viewed
from the rear of instrument
(labelsareonthebackshield)
LOGICAL
ADDRS
LO
HI
F1351
F1352
F1451
F75
F652 F651F01
Figure 1–1: VX4101 VXIbus Connectors, Fuses, and Switch Locations