DATA PRECISION 5740 Скачать руководство пользователя страница 20 | Manualshive

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Содержание 5740

Страница 1: ...72 1002 C Instruction Manual for MODEL 5740 MULTIFUNCTION COUNTER Specifications Operation Theory of Operation Maintenance Parts Lists Schematics qi IDATA PRECISION...

Страница 2: ...oration This informa tion has been prepared for the express purpose of assisting operating and maintenance personnel in the efficient use of the Model 5740 Multifunction Counter and publication of thi...

Страница 3: ...System Performance Check 4 4 1 General 4 4 2 Set Up Power Supply Check 4 5 1 General 4 5 2 Procedure Crystal Time Base Check Counter Latch Display Check 4 7 1 Set Up 4 7 2 Procedure Input Signal Condi...

Страница 4: ...72 1002 Model 5740 COUNTER 6 Frontispiece Model 5740 Multifunction Counter COPYRIGHT 1975 DATA PRECISION CORPORATION PRINTED IN THE U S A...

Страница 5: ...h to average the measured frequency 6 Provides four selectable multiples from 1 to 1000 of the number of cycles over which to average the measured period 7 Automatically positions the display ed decim...

Страница 6: ...0 000 0 sec 5Hz to 2MH2 Pulse 0 5 to 9 999 999 psec 0 pps to 2 000 000 pps Max Resolution 1 nanosec Periods Averaged Resolution Accuracy Readout 1 1 usec 10 0 1 usec 100 0 01 usec 1000 0 001 usec Trig...

Страница 7: ...ten 68 kilohm Input 2V xl Atten Sinewave lOmV RMS 5Hz to 20MHz linearly to 50mV RMS lOOMHz Pulse 30mV p p 25 nanosec width linearly to 150mV p p 7 5 nanosec width Rise Time for adequate sensitivity af...

Страница 8: ...Watts Dimensions aS H x W x 7 3 4 D without handle or 89cm x 216cm X 185cm Weight 6 lbs shipping 5 lbs net or 2 27 cg or 2 951cg respectively o o Operating Temperature 0 C to 40 C Storage Temperature...

Страница 9: ...tions 2 2 CONTROLS AND INDICATORS Figure 2 1 locates and identifies Model 5740 front panel controls and indicators Figure 2 2 locates and identifies Model 5740 rear panel features Table 2 1 describes...

Страница 10: ...COUNTER Ci ac 5740 S s nitr V tou 90i 1 0 1 j OATAy I TZZI Lzr y Fig 2 1 Model 5740 Front Panel Controls and Indicators Fig 2 2 Model 5740 Rear Panel 2 2 COPYRIGHT 1975 DATA PRECISION CORPORATION PRI...

Страница 11: ...measurement modes 8 TRIGGER Potentiometer control adjusts Schmidt Trigger firing level to permit measure ment of low duty cycle input signals 9 Handle Carrying handle Also serves as tilt stand for be...

Страница 12: ...Mode the Model 57it0 counts time increments for a number of pulses determined by the axis crossings of the input signal and as selected by the op eration of the front panel rotary switch The decimal p...

Страница 13: ...rent control set tings when measuring an input period corresponding to approximately 8Hz 2 5 TOTALIZING EVENTS 2 5 1 General In the EVENTS mode of operation the Model 5740 counts axis crossings of the...

Страница 14: ...control circuitry Terminal designations for the 44 pin edge connector are identified in Table 2 4 Note that two signals are used to identify the four operating modes and combinations of these two for...

Страница 15: ...proximately 1 10 or lOOMHz c Set up COUNTER for FREQUENCY Mode select 1 sec gate time dj Remove top cover of the COUNTER locate trim capacitor C12 See Figure 4 3 e Adjust C12 until measured value is e...

Страница 16: ...ough which the power source is switched to the appropriate input transformer tap The table below defines the TBl terminals to which the lead from Switch 1 B should be connected for the designated powe...

Страница 17: ...e schematics are reproduced and bound in the rear of the book and should be referenced when the theory of operation of each module of the instrument is de scribed 3 2 SIMPLIFIED BLOCK DIAGRAMS 3 2 1 M...

Страница 18: ...input signal transitions Periods under control of the Inter cycle Control circuit As before the Intercycle Control circuitry steps the value from the Counter to the Latch and thence to the Display and...

Страница 19: ...f the three manual positions the input pulse train of events is gated to the Pro grammable Divider which in turn is set up to divide by 1 thereby providing a pulse output for every event pulse input A...

Страница 20: ...d of the switch selected time base FREQUEN CY or switch selected number of periods PERIOD counter control is transferred to the Intercycle Control circuitry which Removes the input to the counter Tran...

Страница 21: ...ages of wide band amplification followed by a third stage connected as a Schmitt trigger circuit All three stages are part of the monolithic chip Zll In order to obtain reliable performance of the tri...

Страница 22: ...tary switch S3 and the position of slide switch S4 3 7 PROGRAMMABLE DIVIDER The Programmable Divider is a monolith ic IC device Z19 which produces an out put pulse TBOUT pin 1 for a programmed number...

Страница 23: ...7 incor porates some aspects of Intercycle Control programming as well as the gating to the counter 3 8 1 Counter Gate The configuration of NAND gates Z15 6 Z15 8 Z18 6 and Z18 8 inverter Z17 8 and t...

Страница 24: ...iod is determined by the charging path time constant of R31C31 08 sec attempting to charge C31 to 5 volts and the firing level of unijunction transistor QU set by voltage divider R32 R33 3V The result...

Страница 25: ...ol of the measuring pro cess the states of the counter flip flops are manually SET and RESET respectively to keep a continuous TRANSFER action while rotary switch S3 is in the HOLD or COUNT or RESET p...

Страница 26: ...DIVIDER Start present Measurement Cycle 0 1 0 1 1 0 Counting Latched Static At Next CARRY Pulse out of DIVIDER End Measurement Start Intertercycle Osc Reset DIVIDER to Rj y x 1 0 0 1 0 1 Held At Curr...

Страница 27: ...oth the conversion and latch The seven decimal digits of the mea sured value are multiplexed from the latches and are transmitted on two si multaneous lines one line carries the BCD value of the three...

Страница 28: ...d to the PC board to provide user capability for interpret ing the values and for printing only when the value has been latched between mea surements As shown in Drawing 75 1005 and the main reference...

Страница 29: ...am Model 5740 functional circuit grouping and the provision of carefully selected test points greatly simplify the isolation of trouble to major circuitry blocks Fault isolation within each major bloc...

Страница 30: ...e fault is in the de coder driver and associated scanning cir cuitry 4 3 TEST EQUIPMENT Measuring instruments and test standards with performance specifications as listed in Table 4 1 should be used i...

Страница 31: ...gure 4 2 summarizes the testing strategy for isolating power supply mal functions See Drawing D75 1000 for circuit details and parts list for re placement ordering information CAUTION HIGH VOLTAGES AR...

Страница 32: ...O Display board O O O O O O C7 O OfOJ 0 04 0 OJ QiO QI07 QI08 Qi09 QUO 9 f 7 9 0 I MI 3 a7oQ QiOi Ji_ DISPLAY ASSEMBLY Fig 4 3 Modal 5740 Main PC Board Asiambly Tast Points and Componants COaVRIOHT I...

Страница 33: ...el 5740 Fig 4 4 Crystal Time Bate Check Test Sequence COeVRIGHT 1975DATA PRECISION CORPORATION PRINTED IN THE U SJk ATTEN XI MODE Switch SU PERIOD EVENTS Rotary Switch S3 See procedurJ Figure 4 5 TRIG...

Страница 34: ...dBm xl Full CCW 00100 00 1 Checks minusi TRIGGER 100 msec GATE Time 4 9 PROGRAMMABLE DIVIDER AND DECIMAL POINT CONTROL CHECK FIG 4 7 4 9 1 Set UP Model 571 0 Mode Switch 84 Rotary Switch S3 Signal Gen...

Страница 35: ...SE OK OK SIGNAL TRACE INTERCYCLE COUNTER A CHECK TP2 CHECK TP 4 WAVEFORM CHECK TPl Figure 4 8 Intercycle Control TestSequence 4 11 INPUT SENSITIVITY ATTEN AND TRIGGER LEVEL CHECK FIG 4 6 4 11 1 Setup...

Страница 36: ...72 1002 Model 5740 COUNTER PARTS LISTS COPYRIGHT 1076 DATA PRECItlOM CORPORATION PRINTED IN THE UMJi 5 1...

Страница 37: ...3 04 Capacitor 180pF IKV DiaC 23 111073 06 8 9 36 37 Capacitor 15uF 10V 23 441003 07 Oapaci tor 63uF 15V 23 442004 010 Capacitor 150pF 23 311015 012 Capacitor 2 8pF trimmer 23 310009 013 Oapaci tor 0...

Страница 38: ...65 201 Resistor 4 7K 5 1 4W CC 22 024729 206 300 302 R25 6U Resistor 3K 5X l 4W CC 22 023029 R26 32 Resistor 20K 5 l 4W CC 22 022039 R31 Resistor 300K 57 1 4W CC 22 023049 i R33 Resistor 30K 57 1 4U...

Страница 39: ...72 1002 Model 5740 COUNTER 6 REFERENCE DRAWINGS 6 1 MAIN PC BOARD 6 2 DISPLAY 6 3 BCD OPTION COPVRIGHT 1975 DATA PRECISION CORPORATION PRINTED IN THE U A 6 1...

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