360C Ratio Generator - Astronics Test Systems
Contents
1. STRONICS TEST SYSTEMS Trig Tek 360C Ratio Generator User Manual Publication No 980988 Rev A Astronics Test Systems Inc 4 Goodyear Irvine CA 92618 Tel 800 722 2528 949 859 8999 Fax 949 859 7139 atsinfo astronics com atssales astronics com atshelpdesk astronics com _http Awww astronicstestsystems com Copyright 2011 by Astronics Test Systems Inc Printed in the United States of America All rights reserved This book or parts thereof may not be reproduced in any form without written permission of the publisher THANK YOU FOR PURCHASING THIS ASTRONICS TEST SYSTEMS PRODUCT For this product or any other Astronics Test Systems product that incorporates software drivers you may access our web site to verify and or download the latest driver versions The web address for driver downloads is http www astronicstestsystems com support downloads If you have any questions about software driver downloads or our privacy policy please contact us at atsinfo astronics com WARRANTY STATEMENT All Astronics Test Systems products are designed to exacting standards and manufactured in full compliance to our AS9100 Quality Management System processes This warranty does not apply to defects resulting from any modification s of any product or part without Astronics Test Systems express written consent or misuse of any product or part The warranty also does not apply to fuses software non rechargeable batteries2. 2 Set the NUMERATOR and DENOMINATOR to 001 3 Set the generator for a frequency of 10 000 25 Hz as indicated on the front panel counter Comnect a DC voltmeter to the DC of FREQ OUTPUT Set the FS ADJ R3 for a 10 00 0 05 V indication on the DC voltmeter Set the generator to 100 05 Hz as indicated on the front panel counter Set the ZERO ADJ R2 for a 100 05 mV indication on the DC voltmeter to OE E Calibration Procedure 4 2 Astronics Test Systems
3. REF A and REF B allow front panel selection of either of two reference input signals When the INT 1 KHz input is selected the unit becomes a synthesizer where the setting of the numerator and denominator multiplies and divides the crystal controlled one kilohertz input signal One of the applications of this instrument is for use with turbine engines where the shaft frequency is not directly available but a signal usually derived from a tachometer or a multi toothed gear attached to the shaft provides a frequency related to the fundamental shaft This related signal can be connected to the input of the 360C the NUMERATOR and DENOMINATOR switch set to multiply by the proper ratio to provide the actual fundamental shaft frequency at the ratio output This frequency can then be used as the reference input of a tracking filter such as the 530 B and the filtered output can provide for example shaft vibration at fundamental shaft frequency as the engine is increased and decreased in speed Refer as needed to the block diagram in Figure 1 2 Astronics Test Systems Introduction 1 1 360C User Manual Publication No 980988 Rev A Specifications REF A Input Impedance 100 K ohms Frequency Range 5 Hz 50 kHz Level 30 millivolts P P to 300 volts P P Any periodic waveform sine triangular Waveform square or pulse Pulse width must be at least 10 us Connector Isolated BNC REF B Input Impedance 100 K o
4. damage from battery leakage or problems arising from normal wear such as mechanical relay life or failure to follow instructions This warranty is in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular use The remedies provided herein are buyer s sole and exclusive remedies For the specific terms of your standard warranty contact Customer Support Please have the following information available to facilitate service 1 Product serial number 2 Product model number 3 Your company and contact information You may contact Customer Support by E Mail atshelpdeskOastronics com Telephone 1 800 722 3262 USA Fax 1 949 859 7139 USA RETURN OF PRODUCT Authorization is required from Astronics Test Systems before you send us your product or sub assembly for service or calibration Call or contact Customer Support at 1 800 722 3262 or 1 949 859 8999 or via fax at 1 949 859 7139 We can also be reached at atshelodesk astronics com If the original packing material is unavailable ship the product or sub assembly in an ESD shielding bag and use appropriate packing materials to surround and protect the product PROPRIETARY NOTICE This document and the technical data herein disclosed are proprietary to Astronics Test Systems and shall not without express written permission of Astronics Test Systems be used in whole or in part to solicit quotations
5. e 360C power ON set the switches to the following e INPUT SELECTOR switch to RATIO e SLEW RATE switch to MED e TRACK switch to INT 1 KHz e NUMERATOR switch to 100 e DENOMINATOR switch to 010 e POWER switch to POWER Performance Test Procedure 1 Observe an indication of 10 000 on the front panel counter The LOCK light should illuminate Set the Denominator switch to 100 Observe an indication of 1000 on the front panel counter Place the INPUT SELECTOR switch to X1 Observe an indication of 1000 on the front panel counter Connect the signal generator to REF A INPUT jack g gt QU E PA O Astronics Test Systems Performance Test 2 1 360C User Manual 16 17 18 19 20 Publication No 980988 Rev A Place the INPUT SELECTOR switch to REF A and the TRACK switch to EXT REF A Set the signal generator for an indication of 10 000 50 Hz on the front panel counter The level of the signal should be about 1 volt RMS Connect the DC voltmeter to the DC of FREQ OUTPUT jack 10 11 12 13 14 15 Observe an indication of 10 0 0 2 volts on the DC voltmeter Set the signal generator for an indication of 100 Hz on the front panel counter Observe an indication of 100 2 millivolts on the DC voltmeter Connect the signal generator to REF B INPUT Jack Set the generator for 100 Hz 1 and a level of about 1 volt RMS Place the INPUT SELECTOR switch to REF B and the TRACK switch to EXT REF B Observe an ind
6. equency in hertz Lock Light Led above the Track position of the Mode switch When illuminated it indicates the PLL Phase Lock Loop is locked and the signal to the reference input is proper Astronics Test Systems Introduction 1 3 360C User Manual Publication No 980988 Rev A Dimensions 3 5 high 13 0 deep 19 0 wide Power Requirements Operates with 115 or 230 volts AC with under 10 watts of power LOOP FILTER RATIO OUTPUT DEMONI NATOR gt 1 AN DIVIDER Y NUMERATOR DIVIDER 3 par i RET WHEEL CRYSTAL FREQUI 258 COUNTER INPUT SELECTOR DC OP FREQUENCY OUTPUT Figure 1 2 Block Diagram 360C Multi Ratio Generator Introduction 1 4 Astronics Test Systems Publication No 980988 Rev A 360C User Manual Chapter 2 Performance Test The following performance test procedure should be run to verify that the unit is performing within the manufacturer s specifications The unit uses integrated circuits very stable parts and should not require calibration more often than every six months In the event that a reading is out of tolerance the unit may require calibration see Chapter 4 of this manual Test Equipment Note Equivalent equipment can be used AC DC Voltmeter Keithley 191 Signal Generator Astronics Test Systems 346B Calibrator Initial Switch Setting Prior to turning th
7. es subsidiaries affiliates and distributors harmless against all claims arising out of a claim for personal injury or death associated with such unintended use FOR YOUR SAFETY Before undertaking any troubleshooting maintenance or exploratory procedure read carefully the WARNINGS and CAUTION notices This equipment contains voltage hazardous to human life and safety and is capable of inflicting personal injury RISK OF ELECTRICAL SHOCK DO NOT OPEN CAUTION If this instrument is to be powered from the AC line mains through an autotransformer ensure the common connector is connected to the neutral earth pole of the power supply Before operating the unit ensure the conductor green wire is connected to the ground earth conductor of the power outlet Do not use a two conductor extension cord or a three prong two prong adapter This will defeat the protective feature of the third conductor in the power cord Maintenance and calibration procedures sometimes call for operation of the unit with power applied and protective covers removed Read the procedures and heed warnings to avoid live circuit points Before operating this instrument 1 Ensure the proper fuse is in place for the power source to operate 2 Ensure all other devices connected to or in proximity to this instrument are properly grounded or connected to the protective third wire earth ground If the instrument fails to operate sati
8. et from 1 to 999 and divides the above set product by the set in number Thus any ratio from 1 999 to 999 1 can be set in as the ratio For example ratio input frequency 100 Hz numerator 50 and denominator 20 the ratio output will be 100 x 50 20 250 Hz Performance Test 3 2 Astronics Test Systems Publication No 980988 Rev A 360C User Manual Chapter 4 Calibration Procedure The Ratio Generator has three adjustments on the main board and one adjustment for each of the six harmonic channels A method of adjusting each follows Test Equipment Note Equivalent equipment can be used Digital Multimeter Keithley 191 Signal Generator IEC F31 Oscilloscope Tektronix 922B Preparation and Switch Settings Remove the top cover Place the INPUT SELECTOR switch to XI the SLEW RATE to MED and the TRACK switch to EXT REF A See Figure 4 1 Figure 4 1 360C Multi Ratio Generator Parts Location Drawing Astronics Test Systems Calibration Procedure 4 1 360C User Manual Publication No 980988 Rev A Loop Balance Adjustment 1 Connect the signal generator to the REF A INPUT jack 2 Set the signal generator for 10 Hz and approximately 1 V RMS 3 Setthe NUMERATOR to 010 and the DENOMITATOR to 001 4 With the oscilloscope at the RATIO output set R1 for minimum jitter of the observed waveform DC of Frequency Adjustments 1 Connect the signal generator to the REF A INPUT jack Set the level for approximately 1 V RMS
9. from a competitive source or used for manufacture by anyone other than Astronics Test Systems The information herein has been developed at private expense and may only be used for operation and maintenance reference purposes or for purposes of engineering evaluation and incorporation into technical specifications and other documents which specify procurement of products from Astronics Test Systems TRADEMARKS AND SERVICE MARKS All trademarks and service marks used in this document are the property of their respective owners e Racal Instruments Talon Instruments Trig Tek ActivATE Adapt A Switch N GEN and PAWS are trademarks of Astronics Test Systems in the United States DISCLAIMER Buyer acknowledges and agrees that it is responsible for the operation of the goods purchased and should ensure that they are used properly and in accordance with this document and any other instructions provided by Seller Astronics Test Systems products are not specifically designed manufactured or intended to be used as parts assemblies or components in planning construction maintenance or operation of a nuclear facility or in life support or safety critical applications in which the failure of the Astronics Test Systems product could create a situation where personal injury or death could occur Should Buyer purchase Astronics Test Systems product for such unintended application Buyer shall indemnify and hold Astronics Test Systems its officers employe
10. hms Frequency Range 5 Hz 50 kHz Level 1000 millivolts P P to 50 volts P P Any periodic waveform sine triangular Waveform square or pulse Pulse width must be at least 10 us Connector Isolated BNC X1 Output Impedance Less than 50 ohms Level 10 3 Volts PK PK Waveform Square wave Phase Related to REF In Phase Connector BNC Introduction 1 2 Astronics Test Systems Publication No 980988 Rev A Ratio Output 360C User Manual Impedance Less than 50 ohms Level 10 3 Volts PK PK Waveform Square wave Connector BNC Controls Power switch Applies power to the circuits when placed to POWER Counter Input Selector switch Selects REF A REF B RATIO or X1 as the counter input signal Slew Rate switch Selects SLOW FAST or MED slew rate to permit tracking to a lower frequency when in the SLOW position INT 1 KHz EXT REF A or B switch Selects a fixed 1 kHz crystal frequency to the input of the ratio MULTIPLIER when on the INT 1 KHz position and the designated REF signal when on the EXT REF A or B position Numerator switch The NUMERATOR switch is a three decade position thumbwheel switch that selects from 001 to 999 times the input signal as the numerator Denominator switch The DENOMINATOR switch is a three decade thumbwheel switch to select 001 to 999 as the denominator Indicators Counter Six digit display indicating fr
11. ication of 100 Hz 1 on the front panel counter Place the INPUT SELECTOR switch to X1 Observe an indication of 100 Hz 1 on the front panel counter Place the INPUT SELECTOR switch to RATIO the NUMERATOR switch to 100 and the DENOMINATOR switch to 020 Observe an indication of 500 Hz 1 on the front panel meter Performance Test 2 2 Astronics Test Systems Publication No 980988 Rev A 360C User Manual Chapter 3 Operation The Ratio Generator is designed to produce ratio related frequencies of a reference frequency Although the ratio producing feature is its main one the 360C will operate as a frequency synthesizer This section will describe the use of the controls and indicators to best accomplish these features Input Selector Switch The counter INPUT SELECTOR switch has four positions to select REF A REF B X1 or RATIO as inputs to the frequency counter Any one of the four parameters can be selected without affecting the operation of the unit Track Switch The TRACK switch selects REF A REF B or the INT 1 KHz as the input to the ratio generator When a signal of proper frequency and level is at the input the ratio loop will lock and TRACK LOCK light will illuminate The two reference inputs A and B are provided to allow front panel selection of two different frequencies This is especially useful where a sweep is required to make amplitude versus frequency plots and a sweep generator is needed to sweep the fre
12. quency axis The sweep generator can be connected to REF B and selected as the input by the TRACK switch When the INT 1 KHz position of the TRACK switch is selected the ratio loop is locked to a one kilohertz signal generated by a crystal oscillator Using this stable one kilohertz signal as input precise frequencies can be synthesized using the NUMERATOR switch as a multiplier and the DENOMINATOR switch as a divider to produce a multitude of frequencies Slew Rate Switch The SLEW RATE switch selects the SLOW FAST or MED slew rate for the ratio loop The switch will normally be set in the MED position The slew rate of the loop deals with the ability of the loop to track a signal where the frequency is either increasing or decreasing as a function of time In the MED position the loop will track from 10 Hz to 50 Hz at approximately 30 Hz sec 50 to 150 at approximately 100 Hz sec and 150 Hz and up at approximately 750 Hz sec The FAST rate will double the slew rate the SLOW position will cause the rate to be one half the slew rate of the MED position Astronics Test Systems Performance Test 3 1 360C User Manual Publication No 980988 Rev A Numerator and Denominator Switches The NUMERATOR and DENOMINATOR switches are each a three digit thumb wheel used to program three decade counters The NUMERATOR switch can be set from 1 to 999 and will multiply the input signal frequency by the set in number The DENOMINATOR switch can also be s
13. sfactorily shows visible damage has been stored under unfavorable conditions has sustained stress Do not operate until performance is checked by qualified personnel Publication No 980988 Rev A 360C User Manual Table of Contents Chapter Tucasa ardid 1 1 DRACO CN OI ati la 1 1 Specifications sriti e A Saati td tei EA teh kil idles 1 2 REF A Input katalanske 1 2 REP BI rev ke 1 2 A O NN 1 2 Ratio Output tac ROS E AA A thd thet 1 3 COMMONS OO 1 3 UCA a A err reece eter ere eer r rere EEAS 1 3 DIMENSIONS tie EEE EE EE dsts 1 4 Power Requirements ciarcnuti eet A tae 1 4 Chapter 2200000 A eae ee 2 1 Performanee TeSt e A eects 2 1 Test EQUINA 2 1 Initial Switch Settings ii e A Ad 2 1 Performance Test Procedure arsenita NE E EEEN ETAN E REE A 2 1 Chapter daua 3 1 PGT AEN ON aoc TT AT TT 3 1 Input Selector S Witch cell needed S a aA a a LA deeh 3 1 Track Wilco ia dass cade 3 1 Slew Rate Switch aaea NEE eneste 3 1 Numerator and Denominator Switches cccceeececeeeeeeeeeeeeaeeeeeeeseeeeecaaeeeeaaeeeeneeseaeeesaeeeeeesenees 3 2 o A aie 4 1 Calibration Procedure ussmimmusedgehmnsmdiejmde einen fnise 4 1 TestEqupment uarsuatrea ket ica 4 1 Pr paration and Switch Settings ccoo aida 4 1 Loop Balance Adjustment ruvende da dead 4 2 DGC of Frequency AQJUSTMENTS aaa dela 4 2 Astronics Test Systems i 360C User Manual Publication No 980988 Rev A List of Figures Figure 1 1 360C Ratio Generator rrrnnr
14. vrrrrnnvvvrrrnnvvrrrrnavverrrnarverrrnanneersnanneerrnannesrrnnnnesrnnnnnesrrnnrneennnnnn 1 1 Figure 1 2 Block Diagram 360C Multi Ratio Generator rarvrannrrnnnnvnnenvvnnnvrvnnnrnnnnnnnrrrrenrnrnennnnenennn 1 4 Figure 4 1 360C Multi Ratio Generator Parts Location Drawing ii Astronics Test Systems Publication No 980988 Rev A 360C User Manual DOCUMENT CHANGE HISTORY Revision Date Description of Change A 09 01 2011 Document Control release Asironics Test Systems 360C User Manual Publication No 980988 Rev A This page was left intentionally blank iv Astronics Test Systems Publication No 980988 Rev A 360C User Manual Chapter 1 Introduction The 360C Ratio Generator See Figure 1 1 is a unique instrument that will accept an input signal and provide at the output a ratio of the input frequency A front panel three digit NUMERATOR switch allows multiplying the input signal from 1 to 999 and a three digit DENOMINATOR switch divides the signal by 1 to 999 This signal is brought out on a rear panel BNC connector marked RATIO OUTPUT A front panel frequency counter and a four position selector switch allow the user to monitor the REF A input the REF B input the X1 or the RATIO output sr x RE VERSET EPS GE ahe inana Our NG ea V e id di urine AAA ERES RAFNAXURRRRARRARA OA MUNERA OG D MODE 3800 RANO GENERATOR Figure 1 1 360C Ratio Generator
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