Synthesized Function Generator
Contents
1. c cccceeee 28 rear panel OVELrVICW scsceeecceeeeeeeeeees 15 TTL S activation sssssssssssseseserererrerereesressse 25 Setup StepP sessesesecrerrrerersresresrrererreresereeee 16 EAS LIE aes sence une a 1g sine wave U PEPLERI E aeiiaaie anena a UK power cord ccsccccssccceeesceceeeceeeees 7 selection ements mecre rn tere men oC r rere tener ey 20 speaker application example 33 d specification eseeeeeseresesrreserrerrreerrrrese 37 voltage viewing ssesessessssessesesserrsreresee 22 PAQ ee E tals 34 w square wave eT T 18 warning symbol 2 05 ideeisieiistacsssvtiestss 5 selection sssseeesssssesreesresssseserrersssseeee 20 412. Selects the waveform sine square and triangle For details see page20 Activates TTL output For details see page25 Specifies frequency Specifies the frequency unit MHz kHz or Hz Moves the cursor frequency editing point left or right For details see page21 Attenuates amplitude by 40dB For details see page22 Key operation is for SFG 1013 only Switches the display between frequency and voltage For details see page22 For SFG 1013 only Selects the 2 function associated to the entry keys The LED lights when Shift is activated Turns the output On Off The LED lights when the output is On 13 GWINSTEK SFG 1000 Series User Manual Others Frequency Increases right turn or decreases left editing knob turn the frequency Main output OUTPUT Outputs sine square and triangle 50 0 waveform BNC 50Q output 6 impedance For details see page20 TTL output TTL Outputs TTL output waveform BNC OUTPUT terminal For TTL mode details see a page25 Amplitude AMPL Sets the sine square triangle waveform control amplitude Turn left decrease or right C increase MIN MAX s SFG 1003 only When pulled out attenuates the sine square triangle waveform amplitude by 40dB For details see page22 DC offset OFFSET control When pulled out sets the DC offset level for sine square triangle ae waveform Turn left decrease or right ADJ increase The range is 5V 5V in 50Q lo
3. We GOOD WILL INSTRUMENT CO LTD 1 No 7 1 Jhongsing Rd Tucheng City Taipei County Taiwan 2 No 69 Lu San Road Suzhou City Xin Qu Jiangsu Sheng China declare that the below mentioned product Type of Product Synthesized Function Generator Model Number SFG 1003 SFG 1013 are herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Law of Member States relating to Electromagnetic Compatibility 89 336 EEC 92 31 EEC 93 68 EEC and Low Voltage Directive 73 23 EEC 93 68 EEC For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Directive the following standards were applied EMC EN 61326 1 Electrical equipment for measurement control and laboratory use EMC requirements 1997 A1 1998 A2 2001 A3 2003 Conducted Emission Electrostatic Discharge Radiated Emission EN 61000 4 2 1995 A1 1998 EN 55011 Class A 1998 A2 2001 A1 1999 A2 2002 Current Harmonics Radiated Immunity EN 61000 3 2 2000 A2 2005 EN 61000 4 3 2002 A1 2002 Voltage Fluctuations Electrical Fast Transients EN 61000 3 3 1995 A1 2001 EN 61000 4 4 2004 A2 2005 Surge Immunity EN 61000 4 5 1995 A1 2001 eRe Be heanon EN 61000 4 6 1996 A1 2001 heen Power Frequency Magnetic Field EN 61000 4 8 1993 A1 2001 Voltage Dip Interruption EN 61000 4 11 2004 Safety Low Voltage Equipment Directive 73 23 EEC
4. you must follow when operating SFG 1000 series and when keeping it in storage Read the following before any Operation to insure your safety and to keep the best condition for SEFG 1000 series Safety Symbols These safety symbols may appear in this manual or on SFG 1000 series AN WARNING AN Warning Identifies conditions or practices that could result in injury or loss of life Caution Identifies conditions or practices that could result in damage to SFG 1000 series or to other properties Attention Refer to the Manual Earth ground Terminal Safety Guidelines General Guideline Do not place any heavy object on SFG 1000 series Avoid severe impacts or handling that leads to damage Do not discharge static electricity to SFG 1000 series Use only mating connectors for the terminals e Do not block or obstruct cooling vent opening Do not perform measurements at power source and building installation site Note below Do not disassemble SFG 1000 series unless you are qualified as service personnel GW INSTEK SFG 1000 Series User Manual Power Supply AN WARNING Fuse AN WARNING Cleaning SFG 1000 series Operation Environment Note EN 61010 1 2001 specifies the measurement categories and their requirements as follows SFG 1000 series falls under category II e Measurement category IV is for measurement performed at the soutce of low voltage installation e Measur
5. Em 40dB The main output is attenuated by 40dB and the 40dB display indicator in the display turns On CPE rerert ie a lt i ap LI ut 40dB Set Duty Cycle Square Waveform The duty cycle setting is not available in sine triangle waveform DUTY Enter duty cycle CD o e 5 ADJ Range 25 75 Pull out the Duty knob Turn right left to increase decrease the duty cycle The default is set at 50 Set Offset Offset setting does not apply to TTL output page25 SFG can add or delete offset to the sine square triangle waveform thus changing the waveform vertical position Pull the OFFSET knob to turn On Offset setting Activate offset Adjust offset OFFSET Turn the knob right higher position O or left lower position o dh ADJ Range 5V 5V for 500 output load 23 GW INSTEK SFG 1000 Series User Manual Limitation AN Positive peak clip 500 Negative peak clip 500 24 Note that the output amplitude including the offset is still limited to 5 5V 50Q load 10 10V no load Therefore excessive offset leads to peak clip as below Clipped Offset Offset Clipped GW INSTEK TTL OUTPUT Activate TTL Activate TT eremuaren isi EE a 25 Set frequency Enter QU GY se reterenasestedeseeectaecieter avert saat 26 Edit TVEQUN GNC secies ainiin aS 26 Maximum frequency limit error ceceeeeeeceeeeee
6. Overview cccceee eee 13 fuse TAEAE O N E ae 36 replacement ccceeeccessccecceeeceeesees 35 safety INStruUCtioOn seeeesseresesscrrrrreeee 6 G ground terminal location seeneseeneseersseessseesserrserrrseene 15 SyYMbol esnesenssseessenrssersssessseesseresserrseees 5 I impedance application example 32 in out terminal overview eeeeeseereseee 14 L logic application example 008 32 M model lineup ceccceseeceeeceeeeeeeeeees 11 O OSE ere E A EER 23 example setting ccccceeeeccseseeeeeeees 18 operation environment safety INStruction eeseecsreccrrrerrrreren 6 GWINSTEK INDEX specification acon cccverdcdsvariadeisaetaveuseesedies 38 storage environment Operation shortcut ccccceeeecceeeeeeeeeeees 18 safety Instruction cccccecceeeeeeeeeees 7 P specification cccccceececeeeecceeeeceeeeeees 38 peak cliPismeirsssirsiieiissisesiiserresni nins 24 i PLL example application 000 28 table of CONtENtS cccccceeccceeeeseeeeeeseeeees 3 power supply tilt st nder essre nenin N 16 safety instruction eescesesreeresrereeeee 6 transistor application example 29 power UP sequence cccccececeeeeeeeeeeeeees 17 triangle wave ONG KOTINI E AA A E E 34 example setting sessceeesscererscrreeseree 18 R selection cir vcoutadentbantleusicaauouamueimavens 20 troubleshooting example
7. amp amended by 93 68 EEC Safety Requirements IEC EN 61010 1 2001 39 GW INSTEK SFG 1000 Series User Manual INDEX 4 40dB attenuation RELO EEEE EEE TST 34 Se O E AA 22 A amplifier application example 30 C caution SymMbol essseseeseseesssressereserrrseene 5 cleaning osssicsiiniersnrocisdasireneii tieni 6 constant current circuit sse ssseressees 9 control knob overview sesssesseersserreee 14 D default display ccccccssescccceeeseceeeees 17 digital direct synthesis block diagram ossisccssectsttesatieseccievscsiaess 10 direct digital synthesis cccccceeeeees 9 display contents overview seesseee 12 duty cycle EELO RAAN EEE ERE E E TEOT 34 sine square triangle ccecceeeeeeees 23 i id I peeereeeeee cree nent rr eeera racer ene h ner rertry mee 27 E EN5S5S0OI a a 39 EN61010 declaration of conformity 39 measurement CateQOry cccecceecseeeees 6 pollution degree seeeseesesessereseerrseen 6 error message eYYOY l ae ee et 21 EYYOY eee eet reer ee Eee eee er ees 21 40 251 arun EEE 22 SUN TIIAT Y saccxiyinsaoiniaawesvaddoiwesnraxdens 37 F FAQ aires cteiteseetrenteaaiaiatolanSeanotve ietoiesetniin 34 feature Teta cecinesccuvaatvassilanatontieccessant 11 sine square triangle ccccceecceee ees 20 OT Mi E EE E TTA 26 frequency faq eseessscesessecressssrrsesserrsesese 34 front panel key
8. ee t 6 665 Zo BIBEGHZ CH1i CH2 1G5 MAIN TRIG EDGE ACE USB l m iW Zone CHi AUTO SAMPLE 29 GW INSTEK SFG 1000 Series User Manual Amplifier Over Load Characteristic Test Description Use the triangle wave output from SFG 1000 series to check the amplifier output distortion caused by overload The common sine wave is not the ideal source in this case Observe the linearity of the triangle waveform using an oscilloscope SFG series Block diagram Amplifier Transient Characteristics Test Description Use the square wave output from SFG 1000 series to check the transient frequency response of an amplifier The common sine wave is not the ideal source in this case Observe the waveform using an oscilloscope SFG series Oscilloscope Block diagram 30 GW INSTEK APPLICATION EXAMPLES GW INSTEK SFG 1000 Series User Manual Logic Circuit Test 1 Apply a triangle waveform to the amplifier first Test ste j Adjust the waveform amplitude to make sure there is Description Use the TTL output from SFG 1000 series to test digital no clipping circuits Observe the timing relation of input output 2 Switch to square waveform and adjust its frequency waveform using an oscilloscope to the middle of the amplifier pass band such as ere oE i 20Hz 1kHz and 10kHz Block diagram da 3 Observe the shape of the amplifier output The fo
9. 1 DC Offset lt 5V gt 5V 500 load Duty Range 25 75 lt 1MHz Square Wave Display 6 digits LED display Sine Square Waveform Range ER Sez Triangle Waveform 01Hz MHz Frequency ACU Resolution 0 1Hz maximum Stability 20ppm Accuracy 20ppm Aging 5ppm year 37 GW INSTEK SFG 1000 Series User Manual Sine Wave Triangle Wave Square Wave TTL Output General 38 Harmonic Distortion Flatness Linearity Symmetry Rise Fall Time Level Fan Out Rise Fall Time Power Source Operation Environment Storage Environment Accessories Dimension Weight gt 55dBc 0 1Hz 200kHz 40dBc 0 2MHz 2MHz 35dBc 2MHz 3MHz At maximum position without any attenuation to 1 10 of any combination setting TTL Off lt 0 3dB 0 1Hz IMHz lt 0 5dB IMHz 2MHz lt 1dB 2MHz 3MHz At the max amplitude relating to 1kHz gt 98 0 1Hz 100kHz gt 95 100kHz IMHz 5 of period 4ns 0 1Hz 100kHz lt 100ns at maximum output 500 load 3Vpp 20 TTL Load lt 25ns AC110 220 240V 10 50 60Hz Line voltage setting is factory installed Indoor Use Altitude Up to 2000m Ambient Temperature 0 40 C Relative Humidity lt 80 0 40 C Install Category II Pollution Degree 2 Temperature 10 70 C Humidity lt 70 Instruction Manual x 1 GTL 101 x 1 251 W x91 H x 291 D Approx 2 1kg GW INSTEK APPENDIX Declaration of Conformity
10. APPENDIX pren DIX Fuse Replacement 1 Take off the Handle 2 Take off the Cover In order to detach the handle from the unit turn the handle down 90 degrees then pull it off sideways Take off the two metal holdings from the handle joint Then take the top screw off from the rear panel 35 GW INSTEK SFG 1000 Series User Manual Slide the upper case to the rear side and take off the top cover 3 Replace the Fuse board Fuse rating AC 110V T0 315A 250V AC 220 240V T0 16A 250V 36 GW INSTEK APPENDIX Error Messages j Frequency r n a error L Err 1 Sine square and TTL wave frequency over range This message appears when entering sine square TTL waveform frequency larger than 3MHz The frequency is automatically forced to 3MHz Err 2 Triangle wave Frequency over range This message appears when entering triangle waveform frequency larger than 1MHz The frequency is automatically forced to 1MHz Err 4 Frequency over resolution This message appears when trying to enter frequency less than 0 1Hz The frequency is automatically forced to the previous value Specification e SFG series must be powered for at least 30 minutes within the ambient temperature 18 C 28 C to meet this spec Output Function Sine Square Triangle Amplitude Range 10Vpp 500 load 20 at maximum position Amplitude Accuracy SFG 1013 only Main Impedance 50Q 10 Attenuator 40dB 1dB x
11. GG TCG MGI IC Yairi cues cestocsnss canquarincnstouieduminactaaeaacaest 21 turns On Maximum frequency limit Error ceccceeeeeeeeeeeeeees 21 Minimum frequency limit error eeeecceeeeeeeeeees 22 OUTPUT 2 Lor Tare COMES OUE Om TAE 500 main terminal 10Vp p 50Q load Set amplitude SSE UPD HUG E eoi 22 20Vp p no load View amplitude SFG 1013 aeseseseeessseesseesseees 22 Attenuate by 40dB sensesssessersssersssrsssessseessseo 22 Set duty cycle Emiter duty Cycle ensins 23 Set Freq uency square wave Eit Enter the waveform frequency using the numerical keys Set offset Activate offset con ascactenchuasinecmennsaateactendigseacatmacieentenes 23 f e MHz requency 1 2MHz POISON SOE waces tee neonse ena EE A 23 1 e 2 LII ALON eicrironer innii erare er 24 37kHz EB Le 45Hz Dom 19 20 GW INSTEK SINE SQUARE TRIANGLE WAVE Edit frequnency Maximum frequency limit error Left cursor key moves the active lt SHIFT 4 cursor left Flashing Flashing art a ne or A a TEREN E gg LA Ld Right cursor key moves the active i SHIFT gt 5 cursor right Flashing _ Flashing manag 6 E a ie a os iN Turn the Frequency knob left to decrease the frequency Flashing PIO DIA i i E o 4s Z N Turn the frequency knob right to increase the frequency Flashing ort mam 008 w TERN a a eee For full error message list see page37 Noy I l J Sine and squa
12. ITUG Cas ewscessantonsteindeenwadertmiephawaataunancatseiensn 22 Set Duty Cycle Square Waveform seeceeeneeees 23 SC lectins taceocn N S 23 PPE OU Pil a sspareseantincceaersnacuccatenuee inex tienceneavecceautsaquasee cee 25 PRCT ae E de teet areata ute E eee 25 Sel PEGUEN eaire EN EAA 26 Ser Duty Cycle arusa EEEE E 27 APPLICATION EXAMPLES ccsscscsscsescescscescsceecees 28 Reference Signal for PLL System ccccccsseseeenees 28 Trouble Shooting Signal SOUrCe ccceeeeeeeeeeeeeees 28 Transistor DC Bias Characteristics Test 04 29 Amplifier Over Load Characteristic Test 0 30 Amplifier Transient Characteristics Test 30 GW INSTEK SFG 1000 Series User Manual Logic Circuit lt i eee Te res aaa 32 Impedance Matching Network Test c eeeeee 32 Speaker Driver TeSt ccccsssccsssccscccseccesecenseeeeuss 33 FIO EEEE A E 34 POP EIN Daas ceewate nants ceremeaseeunsasqeetecscendestesestcaticauisebeees 35 Fuse Replacement cccsscccssscceecccesseceecenseeeneeees 35 Error WICSS ACCS oie hie taciatu se tuldin i ni 37 SNC ON eae seese dese cee ececenansiinco sence a Eaa 37 Declaration of Conformity cccccceeececeseeeeeeeneeeees 39 INDEX oat sabes acncateielatniessetuncasliat mssciocuseaavieeieeticomenicones 40 4 GW INSTEK SAFETY INSTRUCTIONS SareTy INSTRUCTIONS This chapter contains important safety instructions that
13. Synthesized Function Generator SFG 1000 Series USER MANUAL GW INSTEK PART NO xxxxxxxxxxx z ISO 9001 CERTIFIED MANUFACTURER GW INSTEK This manual contains proprietary information which is protected by copyrights All rights are reserved No part of this manual may be photocopied reproduced or translated to another language without prior written consent of Good Will company The information in this manual was correct at the time of printing However Good Will continues to improve products and reserves the rights to change specification equipment and maintenance procedures at any time without notice Good Will Instrument Co Ltd No 7 1 Jhongsing Rd Tucheng City Taipei County 236 Taiwan GWINSTEK Table of Contents Table of Contents SAFETY INSTRUCTIONS ciceciceeseiesicienscteqeicostectesecestccueoes 5 Salley SYN 0c bee aE S 5 Safety Guidelines cca vcnessessireceacenesnsaveenrbanusaveveddewomnsaes 5 GETTING STARTED eer renee ee reer mere error rer re ee 8 Technical background vicacnedeseterctucnesnmacomacerdeseteacien 9 Lineup Fearure Soori trn NE aes 11 FON Panel resore E E 12 Rear Parne lasscsneinsninn 15 BD PENE N E AE E E maaan 16 Operation SHOP CUTS cicasaenadasdTacssannensermahsawhoambanntaware 18 SINE SQUARE TRIANGLE WAVE cccccscseseseseseseeeveveeeee 19 Activate WAY Gl OLRM aicsescnoxnsmantonesrdacneaeieiiuwienatovedvenninas 20 SEL PRS GC CY oerein r ian atditalatatetalententd 20 Set AMID
14. ad For details see page23 14 GW INSTEK GETTING STARTED GW INSTEK SFG 1000 Series User Manual Duty cycle DUTY control When pulled out sets the Set U p square or TTL wave duty cycle Turn left gt o decrease or right increase The range Tiltstand Pull out the ADJ is 25 75 For details see page23 handle sideways square wave or page27 TTL and rotate it Power switch POWER Turns the main power On Off For i BO power up sequence see page17 Place SFG horizontally Rear Panel Or tilt stand WARNING TO AVOID SHOCK REMOVE INPUTS BEFORE OPENING Place the handle vertically for hand carry AC Rating AC Power Ground Information Input Terminal AC Rating SFG 1000 series has fixed AC line voltage 110 220 or Information 240V factory installed setting The label shows the applicable rating AC Power Input Accepts the AC power cord 110 220 or 240V 10 50 60Hz Ground The safety ground terminal Use this terminal for Terminal common ground connection 15 16 GW INSTEK GETTING STARTED p 1 Check the voltage eres SOP level displayed on the label 1 and make sure it is identical to the AC line Then connect the power cord 2 2 2 Push and turn On the at Functionality check main power switch on the front panel lt lt G 3 The display shows the default setup Sine wave 1kHz N k Hz 1 IINIT LOL oe Connect SFG main output to measurement device
15. de control 40dB attenuation Duty control Variable DC offset control Output On Off control Voltage display SFG 1013 Output overload protection Interface Frequency output TTL output 11 GW INSTEK SFG 1000 Series User Manual Front Panel Main Display Entry Keys Shift Key Output On Off Key LI ty U 0 0 01 0 0 m v wm DUTY OFFSET AMPL OO MIN Power Frequency Duty Offset Amplitude TTL Main Switch Adjustment Knob Control Control Control Output Output Main Display 7 segment LED Shows frequency and voltage l TTL indicator TTL Indicates that the TTL output is enabled For details see page25 Waveform Ny a NY Indicates the waveform shape Sine indicator Square and Triangle Frequency M k Hz Indicates the output frequency indicator MHz kHz or Hz Voltage m V Indicates Voltage unit mV or V indicator For voltage measurement detail see SFG 1013 only page22 40dB indicator A0dB Indicates 40dB attenuation is SFG 1013 only activated For details see page22 12 GW INSTEK GETTING STARTED Entry keys Waveform key TTL activation Numerical keys Frequency unit selection Cursor selection 40dB attenuation SFG 1013 only Frequency Voltage display selection SFG 1013 only Shift key Output On Off key WAVE Sall gt WAVE 1 Lo aa VIF SHIFT Su Bo C OUTPUT N TTL MHz s r mG 40dB
16. eeees 27 Minimum frequency limit error eeeeecceeeeeeeeeees 27 Set duty cycle Enter duty CCl acer ateeaeat geen aeae 27 Activate TTL Select TTL 1 Press the Output key The LED OUTPUT turns On TTL does not activate ON unless the output is already On TIL 2 Press the Shift key then the sirt wave Wave key TTL indicator appears on the display TTL 3 The waveform comes out from OUTPUT the TTL output terminal Level 23Vp p 25 GW INSTEK SFG 1000 Series User Manual Set Frequency Enter frequency Edit frequnency 26 Enter the waveform frequency using the numerical keys MHz 1 2MHz CJC jC 2 Gils 37kHz isles 3 C7 EB 45Hz 7 aa IED Left cursor key moves the active k SHIFT gt a cursor left Flashing Flashing art I mrt TEREN E gg Lee Right cursor key moves the active ie SHIFT gt 5 cursor right Flashing Flashing ero erie i j E et De ee E Turn the Frequency knob left to decrease the frequency Flashing MIO j e bal l e ll Turn the frequency knob right to increase the frequency Ii Em Flashing GW INSTEK Maximum frequency limit error Minimum frequency limit error TTL OUTPUT For full error message list see page37 TTL TTL frequency is limited to maximum 3MHz When the input exceeds it an error message Err 1 appears and forces the frequency to 3MHz For full error message li
17. ement category III is for measurement performed in the building installation e Measurement category II is for measurement performed on the circuits directly connected to the low voltage installation e Input voltage 110 220 240V AC 10 50 60Hz fixed voltage rating factory installed The power supply voltage should not fluctuate more than 10 Connect the protective grounding conductor of the power cord to earth ground to avoid electrical shock e Fuse type T0 16A 250V for 220V 240V 10 rating TO 315A 250V for 110V 10 rating Replace the fuse with the specified type and rating only for continued fire protection For fuse replacement details see page35 e Disconnect the power cord before fuse replacement e Make sure the cause of the fuse blowout is fixed before fuse replacement Disconnect the power cord before cleaning e Use a soft cloth dampened in a solution of mild detergent and water Do not spray any liquid into SFG 1000 series e Do not use chemicals or cleaners containing harsh materials such as benzene toluene xylene and acetone e Location Indoor no direct sunlight dust free almost non conductive pollution Note below e Relative Humidity lt 80 e Altitude lt 2000m Temperature 0 C to 40 C Note EN 61010 1 2001 specifies the pollution degrees and their requirements as follows SFG 1000 series falls under degree 2 Pollution refers to addition of foreign matter solid li
18. llowing table shows the possible output distortions ecooo0s and their explanations ER Amplitude reduction at low Transient o requency enalectenetls No phase shift ust aT e Low frequency boosted accentuated fundamental Digital Circuit e High frequency loss e No phase shift Low frequency phase shift E Trace thickened by hum voltage Impedance Matching Network Test High frequency loss Oo Oo e Phase shift Description Use SFG 1000 series for impedance matching network testing its frequency characteristic and matching the Low frequency loss impedance e Phase shift i oe Oscilloscope or two Voltmeters Low frequency loss Block diagram Low frequency phase shift e High frequency loss e Low frequency phase shift a e Damped oscillation Potentio Impedance meter Network For narrow band amplifier testing square wave may not Note be suitable Test step Adjust the potentiometer until V2 becomes the half of V1 V2 0 5V 1 Then the impedance Z of the network becomes identical to the potentiometer 31 32 GW INSTEK APPLICATION EXAMPLES Speaker Driver Test Description Use SFG 1000 series for testing the frequency characteristics of audio speakers Record the volt reading versus the input signal frequency Block diagram eee ee SFG series oocoocoopot Graph The peak voltage occurs on the resonant frequency of the speaker Peak of Audio Drive Response s m Correspondent sane M il Re
19. pass filter The resolution is expressed as fs 2k where fs is the frequency and k is the control word which contains more than 28bits Because the frequency generation is referred to clock signal this achieves much higher frequency stability and resolution than the traditional function generators GW INSTEK SFG 1000 Series User Manual Block diagram DDS synthesizer consists of Phase accumulator counter lookout table data ROM Digital to analog converter DAC and Low pass filter LPF Frequency Control Word K 28bit 28bit Phase Accumulator Table ROM RAM 12bit Digital Analog Converter System Clock fs Low Pass Filter Output fo The phase accumulator adds the frequency control word K at every clock cycle fs The accumulator output points to a location in the Table ROM RAM The DAC converts the digital data into an analog waveform The LPF filters out the clock frequency to provide a pure waveform 10 GW INSTEK GETTING STARTED Lineup Features Series lineup Features Frequency Offset TTL 40dB Voltage Lineup output attn display SFG 1003 3MHz o o SFG 1013 3MHz e Main features Performance High resolution using DDS technology High frequency accuracy 20ppm Low distortion 55dBc lt 200kHz High resolution 100mHz Digital user interface with 6 digit LED display Features Various output waveforms Sine Square and Triangle TTL output Amplitu
20. quid or gaseous ionized gases that may produce a reduction of dielectric strength or surface resistivity GW INSTEK SAFETY INSTRUCTIONS e Pollution degree 1 No pollution or only dry non conductive pollution occurs The pollution has no influence e Pollution degree 2 Normally only non conductive pollution occurs Occasionally however a temporary conductivity caused by condensation must be expected e Pollution degree 3 Conductive pollution occurs or dry non conductive pollution occurs which becomes conductive due to condensation which is expected In such conditions equipment is normally protected against exposure to direct sunlight precipitation and full wind pressure but neither temperature nor humidity is controlled Storage e Location Indoor Environment e Relative Humidity lt 70 Temperature 10 C to 70 C Power cord for the United Kingdom When using SFG 1000 series in the United Kingdom make sure the power cord meets the following safety instructions NOTE This lead appliance must only be wired by competent persons TA PA THIS APPLIANCE MUST BE EARTHED IMPORTANT The wires in this lead are coloured in accordance with the following code Green Yellow Earth OE Blue Neutral Oxf Brown Live Phase As the colours of the wires in main leads may not correspond with the colours marking identified in your plug appliance proceed as follows The wire which is coloured Green amp Yellow mu
21. re waveform _ frequency is limited to l o maximum 3MHz When the Lid input exceeds it an error message Err 1 appears and forces the frequency to 3MHz AY Triangle waveform frequency is z limited to maximum 1MHz l rro ra When the input exceeds it an error message Err 2 appears and forces the frequency to 1MHz 21 GW INSTEK SFG 1000 Series User Manual For full error message list see page37 Minimum frequency _ _ LI The minimum frequency is i m it error E l 0 1Hz When the frequency input becomes less than 0 1Hz an error message Err 4 appears and forces the frequency to the previous value Set Amplitude Amplitude setting does not apply to TTL output page25 Sei AMPL Turn the Amplitude knob right e increase or left decrease Amplitude L The range is 2mVpp 10Vpp for 50Q output impedance VIF To view the voltage level View Ema amplitude press the Shift key amplitude and dot V F key The display S FG 101 3 shows the voltage level Repeat this procedure to go back to the frequency level view EE aE a a moe rt Fe L II tat 4 Vv Both SFG 1003 and SFG 1013 can attenuate the main Attenuate by output by 40dB in different method 40dB SFG 1003 iis Pull out the Amplitude knob The CO output amplitude is attenuated by 40dB MIN e MAX 40dB 22 GWINSTEK SINE SQUARE TRIANGLE WAVE SFG 1013 40dB Press the Shift key then 3
22. sponse dB HA Ue ICT i a ae 7 CH i aa HH tt MEE i 40 ll x t k THK Frequency Hz 33 GW INSTEK SFG 1000 Series User Manual AQ I pressed the Power switch on the front panel but nothing happens How can I get out of TTL 40dB mode The device accuracy does not match the specification What are these error messages pressed the Power switch on the front panel but nothing happens Make sure the AC source voltage is set at the rating 10 50 60Hz For power up sequence see pagel7 Otherwise the internal fuse might be blown out For fuse replacement procedure see page35 TTL does not activate pressed Shift Wave key You need to turn On the output first Press the Output key then press Shift Wave For details see page25 How can I get out of TTL 40dB mode For TTL press the Shift key then the wave key For details see page25 For 40dB mode press the Shift key then 3 For details see page22 The device accuracy does not match the specification Make sure the device is powered On for at least 30 minutes within 18 C 28 C This is necessary to stabilize the unit to match the specification What are these error messages Several messages appear when trying to set the frequency in irregular ways Page37 summarizes the messages If there is still a problem please contact your local dealer or GWInstek at www ewinstek com tw marketing goodwill com tw 34 GW INSTEK
23. st see page37 cee 7 Set Duty Cycle Enter duty cycle Range DUTY 25 75 The minimum frequency is 0 1Hz When the frequency input becomes less than 0 1Hz an error message Err 4 appears and forces the frequency to the previous value Pull out the Duty knob Turn right left to increase decrease the duty cycle The default is set at 50 Press the Duty knob The edited duty cycle is stored 27 GW INSTEK SFG 1000 Series User Manual A ppLicaTION EXAMPLES Reference Signal for PLL System The SFG output can be used as a cost effective reference sional for Phase Locked Loop system Directly connect SFG output to PLL input Description SFG series Block diagram Trouble Shooting Signal Source Description The SFG output can be used as the signal source to test the failed part in a circuit system Isolate the problematic part from the rest feed the SFG output as a stimulus and observe the outcome using an oscilloscope SFG series Oscilloscope Block diagram i Circuit System 28 GW INSTEK APPLICATION EXAMPLES Transistor DC Bias Characteristics Test Description Use SFG 1000 series as the signal source for a transistor Compare the transistor input output waveform using the oscilloscope Adjust the DC voltage source to find out the maximum output without distorting the waveform SFG series Oscilloscope Block diagram Oscilloscope display ee em ee
24. st be connected to the Earth terminal marked with the letter E or by the earth symbol gt or coloured Green or Green amp Yellow The wire which is coloured Blue must be connected to the terminal which is marked with the letter N or coloured Blue or Black The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red If in doubt consult the instructions provided with the equipment or contact the supplier This cable appliance should be protected by a suitably rated and approved HBC mains fuse refer to the rating information on the equipment and or user instructions for details As a guide cable of 0 75mm2 should be protected by a 3A or 5A fuse Larger conductors would normally require 13A types depending on the connection method used Any moulded mains connector that requires removal replacement must be destroyed by removal of any fuse amp fuse carrier and disposed of immediately as a plug with bared wires is hazardous if a engaged in live socket Any re wiring must be carried out in accordance with the information detailed on this label GW INSTEK SFG 1000 Series User Manual G ETTING STARTED This chapter describes SFG 1000 series in a nutshell including main features and front rear display introduction Follow the Set Up section to properly install and power up SFG 1000 series Donos DOnmAidbE SFG 1000 series overview Panel introduction Set
25. such as oscilloscope 2 Press the output key The output is activated and the OUTPUT LED turns On oN 3 Observe the output waveform 1kHz sine wave 17 GW INSTEK SFG 1000 Series User Manual Operation Shortcuts Sine wave 250Hz 40dB amplitude OUTPUT 500 Triangle wave 8kHz 2V Offset OUTPUT 500 Square Wave 1MHz 45 duty OUTPUT 500 TTL Output 10kHz TTL OUTPUT 18 1 Press Wave key and select Sine Press 2 5 0 Shift 0 Hz key SEG 1003 Press Output key then pull Amplitude knob SFG 1013 Press Output key then press Shift 3 40dB key Press Wave key and select Triangle Press 8 Shift 9 kHz key Press Output key then pull Offset knob and Rotate Press Wave key and select Square Press 1 Shift 8 MHz key OBC ag 40dB oe kHz Gi gt OFFSET Gea ON ADJ MHz Press Output key then pull Duty knob and rotate Press Output key Press Shift Wave TTL key DUTY O E HA wv Press 1 0 Shift 9 kHz key enan an GWINSTEK SINE SQUARE TRIANGLE WAVE GWINSTEK SFG 1000 Series User Manual Activate waveform SINE SQUARE TRIANGLE as ee E Triang le the display W AV E Ny Sine waveform nl TL Square waveform Activat FOU erp oa a 2 ER AE i Ne Triangle waveform Enter EGUEN O ses sta cos yocnacciatiecanseces AN 20 Serre duSagy aka i i C 2 Press the output key The LED E
26. up Quick reference Technical background scrcicsncecnarmonsrcaceasinacecateeudesnsesees 9 Seres Nep ceee A 11 Main FO AUT SS 5 cera daecteatenc cect enaa 11 Maii Display seroren orr tnne ARER 12 ELOY EEA IE E E ETE 13 EET S sare T E EE E AE E E ysesatons 14 REA PARC re satiate tetane a caenea tee eae es ucseaews 15 E E E E E E E E Sereabaon es 16 PONOT UD ae E E EA 17 Functionality CHECK cc ccccc2sendeasasaneansarerenedeanaieadeneaiers 17 Operation Shortcuts wcuieus tanssentesensvasedsina cavers tuveseatedcnns 18 GW INSTEK GETTING STARTED Technical background Traditional SEFG 2000 series uses the latest Direct Digital Synthesis function DDS technology to generate stable high resolution generators output frequency The DDS technology solves several problems encountered in traditional function generators as follows Constant current circuit methodology This analog function generating method uses a constant current source circuit built with discrete components such as capacitors and resistors Temperature change inside the generator greatly affects the components characteristics which lead to output frequency change The results are poor accuracy and stability DDS In DDS the waveform data is contained in and methodology generated from a memory A clock controls the counter which points to the data address The memory output is converted into analog signal by a digital to analog converter DAC followed by a low
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