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DS345 Synthesized Function Generator

Performance

Tests

5-5

Frequency

Accuracy

5-5

Amplitude

Accuracy

5-5

Offset

Accuracy

5-7

Subharmonics

5-7

Spurious

Signals

5-8

Harmonic

Distortion

5-8

Phase

Noise

5-9

Square

Wave

Rise

Time

5-10

Square

Wave

Symmetry

5-10

Envelope

Distortion

5-10

Test

Scorecard

5-11

Calibration

6-1

Introduction

6-1

Calibration

Enable

6-1

Calbytes

6-1

Necessary

Equipment

6-3

Adjustments

6-3

Clock

Adjustment

6-3

DAC

Reference

Voltage

6-4

Output

Amplifier

Bandwidth

6-4

Bessel

Filter

Adjustment

6-4

Harmonic

Distortion

6-5

Calibration

6-6

5.00

Reference

6-6

Clock

Calibration

6-6

Attenuator

Calibration

6-6

Carrier

Null

Calibration

6-7

Sinewave

Amplitude

6-8

Square

Wave

Amplitude

6-8

Square

Wave

Symmetry

6-9

Arbitrary Waveform Software

Introduction

7-1

Installing

AWC

7-1

Getting Started with AWC

7-1

Hardware

Requirements

7-3

Menus

7-3

File

7-3

Edit

7-3

Waveform

7-4

Send

Data

7-5

Set

DS345

7-5

Trigger

7-6

Zoom

7-6

Help

7-7

Data File Format

7-7

For

More

Info

7-7

DS345 Circuitry

Circuit

Description

8-1

Bottom

Board

8-1

Power

Supplies

8-1

Microprocessor

System

8-1

Display

and

Keyboard

8-1

Ribbon

Cable,

Trigger

and

Sync

8-2

GPIB

and

RS232

Interfaces

8-2

Output

Amplifier

8-3

Output

Attenuator

8-3

Top

Board

8-4

Ribbon

Cable,

ADC,

DACs

8-4

Clocks

8-4

DDS

ASIC

and

Memory

8-5

Amplitude

and

Sweep

DACs

8-5

DDS

Waveform

DAC

8-6

DDS

Output

Filters

and

Doubler

8-6

Sync

and

Gain

Adjust

8-6

Component

Parts

List

9-1

Bottom PC Board and Front Panel

9-1

Top

Board

9-10

Optional

Board

9-21

Miscellaneous

Parts

9-22

Schematic Circuit Diagrams

Sheet No.

Bottom PC Board

Power

Supplies

1/7

Microprocessor

System

2/7

Display

and

Keyboard

3/7

Ribbon

Cable,

Trigger

and

Sync

4/7

GPIB

and

RS232

Interfaces

5/7

Output

Amplifier

6/7

Output

Attenuator

7/7

Top

Board

Ribbon

Cable,

ADC,

DACs

1/7

Clocks

2/7

DDS

ASIC

and

Memory

3/7

Amplitude

and

Sweep

DACs

4/7

DDS

Waveform

DAC

5/7

DDS

Output

Filters

and

Doubler

6/7

Sync

and

Gain

Adjust

7/7

Front

Panel

Keypad

1/2

LED

Display

2/2

Bottom

PCB

Component

Placement

Top

PCB

Component

Placement

Содержание DS345

Страница 1: ...on Generator 1290 D Reamwood Avenue Sunnyvale California 94089 Phone 408 744 9040 Fax 408 744 9049 email info thinkSRS com www thinkSRS com Copyright 1993 99 2009 2012 2015 2016 by SRS Inc All Rights...

Страница 2: ......

Страница 3: ...24 Instrument Setup 2 25 Default Settings 2 25 Store and Recall 2 25 GPIB and RS232 Setup 2 26 Self Test and Autocal 2 27 Arbitrary Waveform Editing 2 29 Edit Menu 2 29 Point Format Editing 2 30 Poin...

Страница 4: ...5 Trigger Menu 7 6 Zoom Menu 7 6 Help Menu 7 7 Data File Format 7 7 For More Info 7 7 DS345 Circuitry Circuit Description 8 1 Bottom PC Board 8 1 Power Supplies 8 1 Microprocessor System 8 1 Display...

Страница 5: ...DS345 Synthesized Function Generator iii...

Страница 6: ...equires a change in the fuse holder voltage card position and fuse value Disconnect the power cord open the fuse holder cover door and rotate the fuse pull lever to remove the fuse Remove the small pr...

Страница 7: ...imited such that Vac peak Vdc 5 V Vpp Vrms dBm 50 Function Max Min Max Min Max Min Sine Square Triangle Ramp Noise Arbitrary 10V 10V 10V 10V 10V 10V 10 mV 10 mV 10 mV 10 mV 10 mV 10 mV 3 54V 5V 2 89V...

Страница 8: ...1 to 1 MHz 1 to 10 MHz 10 to 30 MHz Square Wave Rise Fall Time 15 nS 10 to 90 at full output Asymmetry 1 of period 4nS Overshoot 5 of peak to peak amplitude at full output Ramps Triangle and Arbitrar...

Страница 9: ...t any sweep point TTL output Sweep Output 0 10 V linear ramp signal syncronized to sweep BURST MODULATION Waveform any waveform except NOISE may be BURST Frequency Sine square to 1 MHz triangle ramp t...

Страница 10: ...RS232 C 300 to 19200 Baud DCE and IEEE 488 2 with free DOS Based Arbitrary Waveform Software All instrument functions are controllable over the interfaces Weight 10 lbs Dimensions 8 5 x 3 5 x 13 WHL P...

Страница 11: ...if in single trigger mode BCNT i Sets the burst count to i DPTH i Sets the AM modulation depth to i If i is negative sets DSBSC with i modulation FDEV x Sets the FM span to x Hz MDWF i Sets the modula...

Страница 12: ...tarts autocal and returns status when done TST Starts self test and returns status when done Status Byte Definitions Serial Poll Status Byte bit name usage 0 Sweep Done set when no sweeps in progress...

Страница 13: ...size If the entered value is outside of the allowable limits for the parameter the DS345 will beep and dis play an error message Step Size Each parameter has an associated step size which may be an e...

Страница 14: ...There are no restrictions on minimum or maxi mum sweep span The sweep time may range from 1 ms to 1000 s The DS345 also has two independent rear panel markers that may be used indi cate specific frequ...

Страница 15: ...arkers allows designating any two frequen cies in the sweep This sets the sweep span to the marker positions The sweep now goes from 200 kHz to 900 kHz This function allows zooming in on any feature i...

Страница 16: ...e modulation type to BURST Set the number of pulses in the burst to 10 Any of the units keys may be used to terminate the en try Display the burst trigger source Then change the source from single tri...

Страница 17: ...AM and the RAM output is converted by a high speed digital to analog converter DAC to produce an analog waveform The waveform RAM can be filled with any pattern to produce arbitrary functions as well...

Страница 18: ...rst modulation as well as frequency sweeps All modulation parameters such as rate frequency deviation and modulation index are digitally programmed DDS gives the DS345 greater flexibility and power th...

Страница 19: ...filter limits the frequency of arbitrary waveforms to 10 MHz and rise times to 35 ns The output of the filters pass to an analog multiplier that controls the ampli tude of the waveform This multiplie...

Страница 20: ...Introduction 2 4...

Страница 21: ...he MODIFY UP arrow key adds the step size to the current value while pressing the MODIFY DOWN arrow key subtracts the step size from the current value If the step size is set to an exact power of 10 1...

Страница 22: ...he FUNCTION up down arrow keys select between the output functions If the output frequency is set be yond of the range allowed for a waveform 100 kHz for triangle and ramp a message will be displayed...

Страница 23: ...move the line voltage selector card and rotate the card so that the correct line voltage is displayed when the card is reinserted Replace the fuse 2 External Inputs Trigger Input The trigger input is...

Страница 24: ...ep Output This output generates a 0 10 V ramp that is synchronous with the DS345 s frequency sweep The shield of this output is tied to that of the function out put and may be floated up to 40V relati...

Страница 25: ...OTING section for more details page 4 1 The DS345 will attempt to operate normally after a self test failure press ing any key will erase the error message DS345 OPERATION SETTING THE FUNCTION SYNC FU...

Страница 26: ...ays displayed in units of Hz The DS345 has 1 Hz frequency resolution at all frequencies for all functions The maximum frequency depends on the Function Frequency Range Sine 1 Hz 30 200000000000 MHz Sq...

Страница 27: ...2 37 78 Noise 10V 10 mV 2 09V 2 09 mV 19 41 40 59 Arbitrary 10V 10 mV n a n a n a n a Arbitrary function amplitude may only be set in units of Vpp The output sig nal will briefly go to zero as the out...

Страница 28: ...resolution of both parameters The offset display is automati cally adjusted such that all of the digits that may be changed are displayed PHASE Press PHASE to display and modify the phase of the FUNCT...

Страница 29: ...ed modulation is illegal for example FM frequen cy out of range for the function the DS345 will display an error message and not enable the modulation The erroneous value must be changed before the mo...

Страница 30: ...eys to set the modulation rate The modulation rate is the frequency of the modulation waveform For exam ple if the modulation type is AM the waveform a sine wave and the rate 1 kHz the modulating wave...

Страница 31: ...dulating signal must have an average value of zero The AM INPUT has a bandwidth of about 20 kHz INTERNAL AM The internal modulation generator can modulate any of the DS345 s output functions except NO...

Страница 32: ...ency SPAN sets the amount that the frequency varies from the center frequency The minimum frequency output will be the center frequency SPAN 2 while the maximum frequency will be the center frequency...

Страница 33: ...gest positive phase deviation Phase Span During PM the DS345 outputs a signal whose frequency is centered about the programmed frequency SPAN sets the amount that the phase varies rel ative to zero ph...

Страница 34: ...aveform Points Sampling Frequency for ARB Waveform Starting Point The point in the waveform at which the burst starts the phase may be ad justed for sine square triangle and ramp waves For ARBs the bu...

Страница 35: ...WAVEFORM UP DOWN arrow keys With the SINGLE setting the DS345 s output frequency will be the sweep start frequency until a trigger is received The output will then sweep to the stop frequency reset to...

Страница 36: ...te any two fre quencies in the sweep The MARKER output is a TTL compatible signal that goes high when the sweep frequency crosses the start marker frequency and low when the sweep frequency crosses th...

Страница 37: ...quency and the marker stop frequency will be set to the sweep stop frequency This function is useful for finding the markers when setting up a sweep Span to Marker Press SHIFT SPAN MRK to set the swee...

Страница 38: ...the BURST SWEEP Trigger Rate The frequency of the internal trigger rate generator is set by pressing SHIFT TRIG RATE The rate may be set to any value in the range 0 001 Hz to 10 kHz with two digits of...

Страница 39: ...the modulation waveform is set to ARB is different than the usual modulation rate The value displayed is the value of the modulation rate divider MRD which can be set between 1 and 223 1 8 388 607 Th...

Страница 40: ...the pulse to be 0 Volts You will have to start with a square wave amplitude of at most one half of the maxi mum DS345 peak to peak amplitude This gives a maximum pulse amplitude of 10 Volts into high...

Страница 41: ...arker AM Parameters 50 depth sine wave FM Parameters 1 0 kHz span sine wave PM Parameters 45 0 span sine wave Burst Parameters 1 cycle Trigger Source SINGLE Trigger Rate 1 0 kHz Interface RS232 Baud R...

Страница 42: ...RS232 menu is accessed The GPIB and RS232 interfaces are exclusive only one may be active at a given time the GPIB interface is automatically disabled when RS232 is enabled User Service Requests Whil...

Страница 43: ...ems not tested are the connections from the PC boards to the BNC connec tors the output attenuators the 40 MHz clock and phase locking circuitry the computer interfaces and the SYNC output driver AUTO...

Страница 44: ...ot calibrated are the frequency dependent amplitude corrections the doubler carrier null the attenuator ratios and the clock frequency These values are stable and should not need adjustment except dur...

Страница 45: ...40 MHz clock frequency That is 40 MHz N where N 1 2 3 234 1 for example 40 MHz 20 MHz 13 3333 MHz 10 MHz The DS345 will spend 1 Fsample on each point 40 MHz 25 ns 20 MHz 50 ns etc When a new sampling...

Страница 46: ...8 and less than 16 300 points in a waveform If the point number is set to a value greater than the maximum where there is no data an edit error will result Also if the waveform has fewer than 8 points...

Страница 47: ...TS 12 Press SHIFT LEFT ARROW MODIFY UP ARROW 13 Press CLR 14 DONE Set output function to ARB Set point entry mode if necessary Clear arb function The message arb cleared will be displayed Display edit...

Страница 48: ...the DS345 will automatically add a vertex at 0 0 If the x value has no data be fore a value has been entered for example the data will be displayed as five dashes y Value Each vertex may have an ampli...

Страница 49: ...s SHIFT ARB EDIT and use MODIFY keys to set Entry to VECTOR 4 Press SHIFT ARB EDIT once 5 Press SHIFT RIGHT ARROW then 5 0 UNITS 6 Press STEP SIZE then 2 0 0 UNITS 7 Press SHIFT LEFT ARROW then MODIFY...

Страница 50: ...ARROW then UNITS 19 Press SHIFT RIGHT ARROW STEP SIZE and 8 0 0 UNITS 20 DONE Select vertex and increment to 3 then select y value and set to 2000 Select x value and set to 225 Select vertex and incre...

Страница 51: ...ever a character is received or sent over either inter face The ERR LED flashes when an error has been detected such as an il legal command or an out of range parameter The REM LED is lit whenever the...

Страница 52: ...marker frequency query of 2 parameter command IDN lf Queries the device identification query no pa rameters TRG lf Triggers a sweep no parameters FUNC 1 FUNC lf Sets function to square wave 1 then que...

Страница 53: ...only no AC function output controlled by the OFFS command The AMPL query will return the amplitude in the currently displayed units For example if the display is 3 0 Vrms the AMPL query will return 3...

Страница 54: ...s note All modulation parameters may be set at any time For the changes to have an effect be sure that the modulation type is set correctly and that modulation is enabled see the MTYP and MENA command...

Страница 55: ...art frequency and the marker stop frequency is set to the sweep stop frequency MRKF i x The MRKF command sets the sweep marker frequency to x If i 0 the marker start frequency will be set if i 1 the s...

Страница 56: ...cy to x Hertz An error will be generated if the sweep frequency is less than or equal to zero or greater than allowed by the current function The STFR query returns the current sweep start frequency I...

Страница 57: ...nificant byte first Arbitrary AM Each arbitrary AM point is a 16bit integer value This value is the fraction of front panel amplitude to be output The values range from 32767 1 0 full amplitude to 327...

Страница 58: ...data is sent as 16 bit binary data words The data must be followed by a 16 bit checksum to ensure data integrity The check sum is the 16bit sum of the data words that have been sent If the checksum se...

Страница 59: ...ESR common command reads the value of the standard event status register If the parameter i is present the value of bit i is returned 0 or 1 Reading this register will clear it while reading bit i wi...

Страница 60: ...nal path TST The TST common query runs the DS345 internal self tests After the tests are complete the test status is returned The status may have the following values see the TROUBLESHOOTING section f...

Страница 61: ...command will generate an error if calibration is not enabled MDC i The MDC command sets the mimic DAC to the value i 0 to 255 If the DS345 has modulation enabled this command will have no effect WRD j...

Страница 62: ...B An unmasked bit in the standard status byte has been set 6 RQS MSS SRQ Service Request bit 7 No Command There are no unexecuted commands in the input queue The DDS and ESB bits are set whenever any...

Страница 63: ...ame usage 0 Trig d Set when a burst or sweep is triggered 1 Trig Error Set when a trigger rate error occurs 2 Ext Clock Set when the DS345 is using an external clock source 3 Clk Error Set when a exte...

Страница 64: ...Programming Commands 3 14...

Страница 65: ...he National Instruments card cannot be simply unpacked and put into your com puter To configure the card you must set jumpers and switches on the card to set the I O address and interrupt levels You m...

Страница 66: ...e decl h National Instruments header file void main void function declaration int ds345 unsigned data 10000 up to 10000 points 2 bytes each void main char cmd 40 int i number sum double t if ds345 ibf...

Страница 67: ...h include stdlib h include dos h include math h include float h include decl h National Instruments header file void main void int ds345 unsigned long data 1500 up to 1500 points 4 bytes each void ma...

Страница 68: ...the PM pattern values sets the modulation type to PM modulation waveform to ARB downloads the pattern and enables modulation The program is written in C program to demonstrate arbitrary PM modulation...

Страница 69: ...rt ds345 cmd strlen cmd ibrd ds345 cmd 40 read back reply before sending data ibwrt ds345 char data long 4 number 4 number of bytes 4 per data point 4 for checksum sprintf cmd MENA1 n turn modulation...

Страница 70: ...n arb wf output ibwrt ds345 cmd strlen cmd EXAMPLE 5 Vector Mode Arbitrary Waveform This program downloads an arbitrary in vector edit mode The data is just a list of x values waveform RAM addresses...

Страница 71: ...ting sign zig zag up and down for i 0 i number i data 2 i 50 i x data 2 i 1 8 i 1 2 i 2 y sum data 2 i data 2 i 1 add x and y to checksum data 2 number sum checksum sprintf cmd LDWF 1 d n number comma...

Страница 72: ...Program Examples 3 22...

Страница 73: ...etically Operational Errors These error messages may appear during normal front panel operation and generally are warnings of illegal parameter entries Message Meaning AC DC Error The output Vac Vdc 5...

Страница 74: ...FM frequency 30 2 MHz Arb PM phase shift 180 degrees Arb waveform y value out side of 2048 to 2047 range Arb waveform vertex x value previous ver tex x value Arb waveform vertex x value 16299 No Inte...

Страница 75: ...s ROM has a checksum error XX is the checksum value CPU Error 1 The DS345 has detected a problem in its Z8800 Cpu DAC OFF Err 10 The waveform DAC output offset control carrier null doesn t work shoul...

Страница 76: ...d x 3 sweeping signal error Autocal Errors These errors messages can be generated by autocal If the DS345 fails au tocal try running the procedure again Repeated failure can indicate a hard ware probl...

Страница 77: ...address The DS345 will ignore its front panel key pad when Remote Enable REN has been asserted by the GPIB This REMOTE state is indicated by the REM LED To return to LOCAL operation ie to enable the f...

Страница 78: ...Troubleshooting 4 6...

Страница 79: ...ter Frequency Range 20 MHz min SRS SR620 Time Interval Accuracy 1ns min FFT Spectrum Analyzer Frequency Range DC to 100 kHz SRS SR760 Amplitude Accuracy 0 2 dB Distortion 75 dB below reference RF Spec...

Страница 80: ...each key Each key should have a different keycode Internal Self Tests The internal self tests test the functionality of the DS345 circuitry 1 Turn on the DS345 The ROM firmware version number and the...

Страница 81: ...requency to 1Hz stop frequency to 30MHz and the rate to 100Hz Turn the DS345 s sweep ON 3 Set the scope to 2V div vertical and 1ms div horizontal Trigger the scope on the falling edge of the DS345 s S...

Страница 82: ...Performance Tests 5 4...

Страница 83: ...CY The following tests measure the accuracy of the DS345 output amplitude There are separate tests for sine square and ramp triangle The tests measure the accuracy of the amplitude as a function of fr...

Страница 84: ...ut to the voltmeter using the most sensitive voltmeter range since the nominal signal level is about 7mV DC Allow the DS345 at least 1 2 hour to warm up 2 Set the DS345 to sine wave 1 kHz 3 00 Vrms Al...

Страница 85: ...ut 1 Connect the DS345 s output to the voltmeter with a 50 terminator Set the DS345 to sine wave 1 kHz 10Vpp 0V offset Set the voltmeter to meas ure DC voltage 2 Measure the offset voltage and verify...

Страница 86: ...rum analyzer to 20 004 MHz 100 kHz span Measure the amplitude of the spurious signals and verify that they are 50 dBc 4 Set the DS345 to 18 MHz Set the spectrum analyzer to sweep from 1kHz to 100 MHz...

Страница 87: ...atio of this voltage to that obtained in step 3 dB 20 log V5 V3 Add 6 dB to this value to compensate for the mixer This value should be less than 55 dB Record the result OUTPUTS FUNCTION SYNC REM SRQ...

Страница 88: ...A input of the time interval counter and terminate into 50 Set the DS345 to square wave 1 MHz 5 Vpp 2 Set the time interval counter to measure the positive width of the A input Record the reading 3 S...

Страница 89: ..._______ 1 034 Vrms sine 1 kHz 0 5 Vrms 0 483 Vrms ____________ 0 517 Vrms sine 1 kHz 0 25 Vrms 0 242 Vrms ____________ 0 259 Vrms sine 1 kHz 125 mVrms 121 mVrms ____________ 129 mVrms sine 1 kHz 75 mV...

Страница 90: ...0 0002 V DC Offset Accuracy DC AC 1 kHz 10 Vpp 0 Vdc 0 08 V ___________ 0 08 V 100 kHz 10 Vpp 0 Vdc 0 08 V ___________ 0 08 V 1 MHz 10 Vpp 0 Vdc 0 08 V ___________ 0 08 V 10 MHz 10 Vpp 0 Vdc 0 08 V __...

Страница 91: ...2 ____________ noise 20 log V2 V1 6 dB ____________ 55 db Square Wave Rise Time square 1 MHz 10 Vpp 10 to 90 rise time ____________ 15 ns square 1 MHz 10 Vpp Overshoots ____________ 500 mV Square Wave...

Страница 92: ...rd This board will hinge open the optional oscillator hinges with the circuit board In the center of the bottom circuit board is a four position DIP switch labelled SW300 Set SW300 switch 2 ON to enab...

Страница 93: ...on for 30 dB attenuator 12 Attenuator 36 dB N Gain correction for 36 dB attenuator 13 Attenuator 42 dB N Gain correction for 42 dB attenuator 14 System amp DAC Y Offset of system amplitude DAC 15 ASIC...

Страница 94: ...ADJUSTMENTS The following adjustments set the values of all of the variable components in the DS345 After an adjustment has been made the associated calibrations must be made All adjustments must be c...

Страница 95: ...s 0 0V 2 Connect the output of the DS345 to the oscilloscope with a 50 termina tor Set the DS345 to square wave 8 Vpp 100 Hz Set the scope to 2 V div vertical and 5 ms div horizontal Adjust R639 for t...

Страница 96: ...5 to sine wave 8 Vpp 15 kHz Connect the DS345 s output to the FFT analyzer with a 50 terminator Set the FFT analyzer to display from DC to 100 kHz 2 Adjust P602 bottom board to minimize the levels of...

Страница 97: ...e sure that the DS345 has been completely reassembled and warmed up for at least 1 2 hour before this calibration is started 1 Connect the DS345 s 10 MHz output to the frequency counter input with a 5...

Страница 98: ...be done before the amplitude calibrations 1 Set the DS345 to sine wave 1 kHz 8 Vpp 0 V offset Connect the DS345 s output to the FFT spectrum analyzer using a 50 terminator Set the analyzer to display...

Страница 99: ...yte number for a given frequency is number 20 f 1000Hz 312500 Hz that is 313500 Hz 21 626000 Hz 22 etc 5 Set calbyte 117 to the same value as calbyte 116 Square Wave Amplitude This calibration correct...

Страница 100: ...e wave 1 kHz 10 Vpp Connect the DS345 s out put to the counter with a 50 terminator Set the DS345 s frequency step size to 312500 Hz Set the counter to measure the pulse width of the square wave input...

Страница 101: ...Calibration 6 10...

Страница 102: ...me Engine 2 6 folder Inside this folder run NIvisa260runtime exe and follow the on screen instructions 3 If you have LabView version 6 1 installed on your computer skip step 4 below Just run Arbitrary...

Страница 103: ...tal number of points in the waveform 7 Select the Edit menu We are going to edit this waveform We want to invert it and then multiply by an exponential damping factor 8 Select Mirror The waveform will...

Страница 104: ...les is txt however any other extension may be used Stored data file should contain all information necessary to restore AWC s state the waveform data sampling rate and trigger conditions Once a file i...

Страница 105: ...amplitude in Volts peak to peak is also entered The waveform will have zero DC offset Exponential Produces an exponentially shaped pulse The user is asked for three parameters The waveform can be betw...

Страница 106: ...can be observed at the output of the DS345 by selecting the ARB function from the front panel or through the trigger menu in AWC see below ASCII file This selection sends an ASCII file directly from d...

Страница 107: ...the DS345 plus the PC mouse If PC mouse is selected a trigger button will appear on the AWC screen The DS345 will trigger each time the button is clicked Zoom Menu The zoom menu allows the AWC displa...

Страница 108: ...internal trigger rate The remainder of the lines are the waveform amplitude points There is one line for each point There must be a minimum of 8 points and a maximum of 16 300 points for each wavefor...

Страница 109: ...Arbitrary Waveform Composer 7 8...

Страница 110: ...gnal is provided for triggering by U110A MICROPROCESSOR SYSTEM SHEET 2 OF 7 Instrument control is provided by U200 a Z8800 microprocessor with 64k bytes of ROM and 32k bytes of RAM The RAM is backed u...

Страница 111: ...als are optically coupled directly to the Z8800 processor UART during RS232 communication through U523 U520 and U522 respec tively During GPIB communications the parallel GPIB data is handled by shift...

Страница 112: ...ts effective collector load is very high the collector of Q605 Q609 and Q600 are just emitter followers which sup ply the final output drive current The closed loop gain of the amp is fixed at 25 by t...

Страница 113: ...sonant frequency of the oscillator is fixed at the third harmonic of the crystal primarily by L204 L205 and C202 R233 keeps the Q of the tank low enough to avoid spurious oscillation off the crystal r...

Страница 114: ...rve a similar purpose for the waveform RAMS U312 U313 and U313 are glue logic to control writes and chip enables etc Three external chip select outputs from the ASIC WR_EXT0 1 and 2 con trol the writi...

Страница 115: ...degree Bessel filter is used for arbitrary functions and ramps and triangles and the 9th degree 16 5 MHz Cauer fil ter filters the sine outputs The Bessel filter s group delay characteristics are des...

Страница 116: ...tput cannot contain frequency compo nents higher than half of the sampling clock frequency The fast edges on the square wave output must contain very high frequency components in or der to maintain th...

Страница 117: ...DS345 Circuitry 8 8...

Страница 118: ...dial C 121 5 00100 517 2 2U Capacitor Tantalum 35V 20 Rad C 122 5 00100 517 2 2U Capacitor Tantalum 35V 20 Rad C 123 5 00100 517 2 2U Capacitor Tantalum 35V 20 Rad C 124 5 00192 542 22U MIN Cap Mini E...

Страница 119: ...00 517 2 2U Capacitor Tantalum 35V 20 Rad C 600 5 00002 501 100P Capacitor Ceramic Disc 50V 10 SL C 601 5 00022 501 001U Capacitor Ceramic Disc 50V 10 SL C 602 5 00022 501 001U Capacitor Ceramic Disc...

Страница 120: ...oated Rectangular D 29 3 00455 310 GREEN COATED LED Coated Rectangular D 30 3 00885 306 YELLOW LED Rectangular D 31 3 00455 310 GREEN COATED LED Coated Rectangular D 32 3 00547 310 RED COATED LED Coat...

Страница 121: ...nnector BNC JP401 1 00166 130 60 PIN DIL Connector Male JP500 1 00037 130 16 PIN DIL Connector Male K 701 3 00422 335 RG2ET DC5V Relay K 702 3 00422 335 RG2ET DC5V Relay K 703 3 00422 335 RG2ET DC5V R...

Страница 122: ...00022 325 2N3906 Transistor TO 92 Package Q 611 3 00021 325 2N3904 Transistor TO 92 Package Q 612 3 00028 325 2N5771 Transistor TO 92 Package Q 613 3 00027 325 2N5770 Transistor TO 92 Package Q 614 3...

Страница 123: ...on Film 1 4W 5 R 303 4 00041 401 150 Resistor Carbon Film 1 4W 5 R 304 4 00041 401 150 Resistor Carbon Film 1 4W 5 R 305 4 00041 401 150 Resistor Carbon Film 1 4W 5 R 306 4 00034 401 10K Resistor Carb...

Страница 124: ...K Resistor Carbon Film 1 4W 5 R 634 4 00743 407 536 Resistor Metal Film 1 8W 1 50PPM R 635 4 00483 407 1 05K Resistor Metal Film 1 8W 1 50PPM R 636 4 00427 449 49 9 Resistor Metal Film 1 2W 1 50ppm R...

Страница 125: ...149 329 LM317T Voltage Reg TO 220 TAB Package U 103 3 00149 329 LM317T Voltage Reg TO 220 TAB Package U 104 3 00141 329 LM337T Voltage Reg TO 220 TAB Package U 105 3 00149 329 LM317T Voltage Reg TO 22...

Страница 126: ...7 TO 5 Heat Sinks Z 0 0 00165 003 TO 18 Insulators Z 0 0 00187 021 4 40X1 4PP Screw Panhead Phillips Z 0 0 00208 020 4 40X3 8PF Screw Flathead Phillips Z 0 0 00209 021 4 40X3 8PP Screw Panhead Phillip...

Страница 127: ...List Ref No SRS Part No Value Description C 1 5 00472 569 4 7U T35 Cap Tantalum SMT all case sizes C 2 5 00472 569 4 7U T35 Cap Tantalum SMT all case sizes C 3 5 00299 568 1U Cap Ceramic 50V SMT 1206...

Страница 128: ...O C 205 5 00027 503 01U Capacitor Ceramic Disc 50V 20 Z5U C 206 5 00027 503 01U Capacitor Ceramic Disc 50V 20 Z5U C 207 5 00008 501 22P Capacitor Ceramic Disc 50V 10 SL C 208 5 00250 532 82P Capacitor...

Страница 129: ...ic 50V 80 20 Z5U AX C 528 5 00262 548 01U AXIAL Capacitor Ceramic 50V 80 20 Z5U AX C 529 5 00262 548 01U AXIAL Capacitor Ceramic 50V 80 20 Z5U AX C 530 5 00262 548 01U AXIAL Capacitor Ceramic 50V 80 2...

Страница 130: ...100P Capacitor Ceramic Disc 50V 10 SL C 608 5 00002 501 100P Capacitor Ceramic Disc 50V 10 SL C 609 5 00002 501 100P Capacitor Ceramic Disc 50V 10 SL C 610 5 00002 501 100P Capacitor Ceramic Disc 50V...

Страница 131: ...U C 702 5 00023 529 1U Cap Monolythic Ceramic 50V 20 Z5U C 703 5 00023 529 1U Cap Monolythic Ceramic 50V 20 Z5U C 704 5 00023 529 1U Cap Monolythic Ceramic 50V 20 Z5U C 705 5 00023 529 1U Cap Monolyth...

Страница 132: ...Circuit Board Q 203 3 00018 324 MRF904 Transistor TO 72 Package Q 604 3 00022 325 2N3906 Transistor TO 92 Package Q 700 3 00021 325 2N3904 Transistor TO 92 Package Q 701 3 00021 325 2N3904 Transistor...

Страница 133: ...ilm 1 4W 5 R 120 4 00021 401 1 0K Resistor Carbon Film 1 4W 5 R 121 4 00471 401 82 Resistor Carbon Film 1 4W 5 R 122 4 00471 401 82 Resistor Carbon Film 1 4W 5 R 123 4 00471 401 82 Resistor Carbon Fil...

Страница 134: ...lm 1 4W 5 R 302 4 00034 401 10K Resistor Carbon Film 1 4W 5 R 303 4 00034 401 10K Resistor Carbon Film 1 4W 5 R 304 4 00034 401 10K Resistor Carbon Film 1 4W 5 R 400 4 00433 407 931 Resistor Metal Fil...

Страница 135: ...al Film 1 8W 1 50PPM R 620 4 00193 407 499 Resistor Metal Film 1 8W 1 50PPM R 621 4 00030 401 10 Resistor Carbon Film 1 4W 5 R 622 4 00191 407 49 9 Resistor Metal Film 1 8W 1 50PPM R 623 4 00188 407 4...

Страница 136: ...00130 407 1 00K Resistor Metal Film 1 8W 1 50PPM R 736 4 00130 407 1 00K Resistor Metal Film 1 8W 1 50PPM R 737 4 00356 407 20 Resistor Metal Film 1 8W 1 50PPM R 738 4 00021 401 1 0K Resistor Carbon...

Страница 137: ...C273 Integrated Circuit Thru hole Pkg U 404 3 00411 340 74HC273 Integrated Circuit Thru hole Pkg U 405 3 00238 340 74F74 Integrated Circuit Thru hole Pkg U 406 3 00087 340 LF347 Integrated Circuit Thr...

Страница 138: ...25 PIN D Connector D Sub Right Angle PC Female R 500 4 00021 401 1 0K Resistor Carbon Film 1 4W 5 R 501 4 00021 401 1 0K Resistor Carbon Film 1 4W 5 R 502 4 00076 401 390 Resistor Carbon Film 1 4W 5 R...

Страница 139: ...Lexan Overlay Miscellaneous and Chassis Assembly Parts List Ref No SRS Part No Value Description U 202 3 00345 342 27C512 120 EPROM PROM I C Z 0 0 00150 026 4 40X1 4PF Screw Black All Types Z 0 0 001...

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