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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Tektronix VX4801, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Tektronix VX4801 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of Tektronix VX4801. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of Tektronix VX4801 should contain:
- informations concerning technical data of Tektronix VX4801
- name of the manufacturer and a year of construction of the Tektronix VX4801 item
- rules of operation, control and maintenance of the Tektronix VX4801 item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Tektronix VX4801 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Tektronix VX4801, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Tektronix service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Tektronix VX4801.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Tektronix VX4801 item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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User Manual VX4801 Pr ogrammable Digital I/O Module 070-9153-03 This document applies for firmware version 1.00 and above.[...]
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Copyright T ektronix, Inc. All rights reserved. T ektronix 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. T ektronix, Inc., P .O. Box 1000, W ilsonville, OR 97070[...]
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W ARRANTY T ektronix 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, T ektronix, at its option, either will repair the defective product without charge for parts and labor , or will provide a[...]
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EC Declaration of Conformity We T ektronix Holland N.V . Marktweg 73A 8444 AB Heerenveen The Netherlands declare under sole responsibility that the VX4801 meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility . Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communit[...]
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$$# $ " "$ !$ # 0641'7&6,10 [...]
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VX4801 Programmable Digital I/O Module iii General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. Only qualified personnel should perform service pr ocedur es. While using this product, you may need to access other parts of the system. Read the General Safet[...]
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General Safety Summary iv VX4801 Programmable Digital I/O Module Safety T erms and Symbols These terms may appear in this manual: W ARNING. W arning statements identify conditions or practices that could r esult in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could r esult in damage to this pr oduct or o[...]
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Output high voltage (V oh ) min typ max units I o = –20 A l o = –6 mA Output low voltage (V ol ) l o = 20 A l o = 24 mA Output low current (l ol ) Input high voltage (V ih ) Input low voltage (V il ) * Input current (l in ) T ri-state leakage current (l oz ) 4.4 3.84 5.0 4.2 V V 0 0 0.1 0.5 V V 24 mA 2.0 V 0.8 V 230 A A 5.0 0.5 [...]
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VX4801 Programmable Digital I/O Module A–19 Appendix E: Performance V erification 123 This procedure verifies the performance of the VX4801 Programmable Digital I/O Module. The test sequences may be performed in your current VXIbus system if it meets the requirements described in T able 2. Also, it is not necessary to complete the entire procedur[...]
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Appendix E: Performance V erification A–20 VX4801 Programmable Digital I/O Module NOTE . Commands to the VX4801 may be enter ed in upper or lower case. However , to avoid confusion between the alphanumeric characters; e.g. one (1) and L or zer o( 0) and o, all commands ar e shown in the case which pr ovides the gr eatest distinction. Use special [...]
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Appendix E: Performance V erification VX4801 Programmable Digital I/O Module A–21 34 18 1 Byte 3 LSB Byte 2 MSB Byte 5 LSB GND Byte 0 LSB DAK 6 DA V 5 GND GND GND 1 34 39 50 33 17 1 14 25 13 8 Byte 4 LSB DRd Byte 2 T ri-St Byte 1 T ri-St VX4801 Slave Module VX4801 Under-test Byte 0 T ri-St Byte 5 T ri-St Byte 4 T ri–St Byte 3 T ri-St RFD 17 33 [...]
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Appendix E: Performance V erification A–22 VX4801 Programmable Digital I/O Module VX4801 Under-T est Configuration In order to perform this procedure, the VX4801 under-test must be installed in an approved VXIbus system. At a minimum, the system must contain the elements listed in T able 2. T able 2: Elements of a Minimum VX4801 Under-T est Syste[...]
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Appendix E: Performance V erification VX4801 Programmable Digital I/O Module A–23 T est Record Photocopy the T est Record, and use it to record the performance verification results for your module. T able 4: VX4801 T est Record VX4801 Serial Number: T emperature and Relative Humidity: Date of Last Calibration: V erification Performed by: Certific[...]
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Page 82
Appendix E: Performance V erification A–24 VX4801 Programmable Digital I/O Module Self T est The VX4801 includes a built-in self test function (BITE) which is automatically executed each time the power is turned on and when the Internal Self T est (S) command is issued. BITE uses internal routines and circuitry to confirm basic I/O functionality [...]
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Appendix E: Performance V erification VX4801 Programmable Digital I/O Module A–25 NOTE . If you ar e using National Instruments NI-488.2 softwar e you may wish to select the buffer 1 mode to allow mor e comfortable viewing of the ASCII r esponse. Just type buffer 1. 1. T o verify the system configuration, send the T ABLE command to the Slot 0 Res[...]
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Appendix E: Performance V erification A–26 VX4801 Programmable Digital I/O Module (Observe: VX4521 Slot 0 indicates S in 2nd digit) NOTE . The zer o length r ead serves to un-addr ess the Slot 0 controller which allows it to detect the VXIbus interrupt and assert the SRQ. b. Check that the F AILED light on the VX4801-device-under[...]
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Appendix E: Performance V erification VX4801 Programmable Digital I/O Module A–27 2. Perform a self test and query for any error codes (in ASCII format) with the VX4801 device-under-test and the Slave VX4801: (Observe: NO ERRORS) ?[...]
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Appendix E: Performance V erification A–28 VX4801 Programmable Digital I/O Module 4. T o verify the even byte data inputs and the odd byte data outputs, reset the VX4801 to its power-up state and then set its mode for the even bytes (0, 2, 4) to be active low inputs, for the odd bytes (1, 3, 5) to be active high outputs loaded with a Load Output [...]
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Appendix E: Performance V erification VX4801 Programmable Digital I/O Module A–29 (Observe: response of 00FF00FF00FF) b. Repeat the above test, this time with the even bytes set as inputs and [...]
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Appendix E: Performance V erification A–30 VX4801 Programmable Digital I/O Module (Observe: response of 00FF00FF00FF) d. Set the Slave to un-assert external tri-state signals. Then set the VX4801 for the odd bytes to be inputs, for the even bytes to be outputs with a Load Output value of 00, and[...]
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Appendix E: Performance V erification VX4801 Programmable Digital I/O Module A–31 This test sequence verifies that data can be transferred to and from the VX4801 using the four handshake signal lines Data Ready (DRD), Data Acknowledge (DAK), Ready for Data (RFD), and Data A vailable (DA V). NOTE . T yping err ors will result in a VX4801 err or co[...]
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Appendix E: Performance V erification A–32 VX4801 Programmable Digital I/O Module d. Set the Slave to initialize byte 2 with an Output Data value of 01 (asserts RFD to the VX4801) and verify that the VX4801 correspondingly asserts DA V : (Observe: VX4801 DA V light on) e. Set the Slave to input bytes 1 and 3 an[...]
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Appendix E: Performance V erification VX4801 Programmable Digital I/O Module A–33 e. Send a byte 5 input command to the VX4801 and verify that the DAK light is on. Then read the data, observe a response of AA, perform a second read and observe that the VX4801 is again waiting for a DRD strobe: (Observe VX4801 DAK ligh[...]