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GW Instek SFG-2000 Series, User Manual

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Page: 51 / 59

GW Instek SFG-2000 Series User Manual Download Page 51

SFG-2000 Series User Manual

50

Sweep for Speaker Test

Description

Use the sweep feature in SFG-2000 series for testing the
frequency response of an audio speaker.

Test
description

1.

Set SFG output to sine wave, 20Hz.

2.

Activate sweep and set LIN/LOG, sweep time, and
sweep span.

3.

Change the frequency if other bands need to be
tested.

Block diagram

SFG series

Speaker

Amplifier

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

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Summary of Contents for SFG-2000 Series

Page 1: ...service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE IN...

Page 2: ...Function Generator SFG 2000 SFG 2100 Series USER MANUAL GW INSTEK PART NO 82FG 21200MD ISO 9001 CERTIFIED MANUFACTURER Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www ar...

Page 3: ...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 maint...

Page 4: ...hortcuts 22 Default Setting Contents 24 SINE SQUARE TRIANGLE WAVE 25 Select the waveform 26 Set the Frequency 26 Set the Duty Cycle Square Waveform 28 Set Amplitude 29 Set Offset 30 TTL CMOS OUTPUT 31...

Page 5: ...as Characteristics Test 45 Amplifier Over Load Characteristic Test 46 Amplifier Transient Characteristics Test 46 Logic Circuit Test 48 Impedance Matching Network Test 48 Speaker Driver Test 49 Sweep...

Page 6: ...on for SFG 2000 series Safety Symbols These safety symbols may appear in this manual or on SFG 2000 series WARNING Warning Identifies conditions or practices that could result in injury or loss of lif...

Page 7: ...easurement performed at the source of low voltage installation Measurement category III is for measurement performed in the building installation Measurement category II is for measurement performed o...

Page 8: ...d or gaseous ionized gases that may produce a reduction of dielectric strength or surface resistivity Pollution degree 1 No pollution or only dry non conductive pollution occurs The pollution has no i...

Page 9: ...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 ins...

Page 10: ...ower up SFG 2000 series SFG 2000 series overview Technical background 10 Series lineup 12 Main features 12 Panel introduction Front Panel 13 Rear Panel 19 Setup Tilt stand 20 Power up 21 Recall the de...

Page 11: ...components characteristics which lead to output frequency change The results are poor accuracy and stability DDS methodology In DDS the waveform data is contained in and generated from a memory A cloc...

Page 12: ...M Digital Analog Converter Low Pass Filter System Clock fs Output fo 28bit 12bit The phase accumulator adds the frequency control word K at every clock cycle fs The accumulator output points to a loca...

Page 13: ...maintained at full range Features Wide output frequency range 4 7 10 20MHz Various output waveforms Sine Square and Triangle TTL CMOS output Variable DC offset control Output overload protection Store...

Page 14: ...m Output TTL CMOS Output Counter Input Amplitude Attenuation Control DC Offset Control CMOS Amplitude Control SFG 2000 series front panel Waveform selection Key Cursor Keys Editing Knob Entry Keys Pow...

Page 15: ...at the duty cycle is being edited For square waveform details see page25 Indicates that the waveform output is attenuated by 20dB For attenuation details see page29 For SFG 2100 series only Indicates...

Page 16: ...r details see page26 Entry keys Enters frequency duty cycle and various parameters 1 2 MHz 1 2MHz kHz 3 7 37kHz 5 4 Hz 45 in duty cycle mode 45Hz in frequency mode DUTY 7 Enter duty cycle page28 20dB...

Page 17: ...uty cycle Cursor keys Moves the editing point left or right in case of manual editing Waveform output OUTPUT 50 Outputs sine square and triangle waveform BNC terminal 50 output impedance TTL CMOS outp...

Page 18: ...ET When pulled out sets the DC offset level for sine square triangle waveform Turn left decrease or right increase The range is 5V 5V in 50 load For details see page30 CMOS amplitude control TTL CMOS...

Page 19: ...M SWEEP SPAN 0 MAX This knob is available in SFG 2100 series only It becomes effective in sweep mode and AM FM mode In Sweep mode Sets the sweep span Turn left narrow or right wide The range is 1 100...

Page 20: ...hes the modulation signal from internal to external For modulation details see page37 AM or page38 FM AC Power Input Accepts the AC power cord 115 or 230V 50 60Hz AC Voltage Selector Selects 115V or 2...

Page 21: ...et Up Tilt stand Pull out the handle sideways and rotate it Place SFG horizontally Or tilt stand Place the handle vertically for hand carry Artisan Technology Group Quality Instrumentation Guaranteed...

Page 22: ...ows model name and the last setup Example SFG 2110 500Hz triangle wave in sweep mode and 20dB attenuation enabled Recall the default setting Press 2 to recall the default setup SFG shows the message d...

Page 23: ...fset knob ADJ and Rotate OFFSET ADJ 1 Press Wave key and select Square WAVE 2 Press 1 MHz key 1 MHz 3 Press Shift 7 key Duty DUTY 7 Square Wave 1MHz 45 duty OUTPUT 50 4 Press 4 5 Hz key Or Rotate the...

Page 24: ...eep 10kHz start Triangle wave 8kHz OUTPUT 50 5 Press SWEEP SPAN knob and rotate SWEEP SPAN 1 Press Wave key and select Sine WAVE 2 Press 1 0 kHz key 1 0 kHz 3 Press Shift dot key AM AM AM Internal 50...

Page 25: ...ecall RECALL 3 2 The Recall sign appears 3 Enter the memory number 1 10 Recall the setting from memory No 1 4 The done sign appears Default Setting Contents Recall default settings 2 Press the shift k...

Page 26: ...ter frequency 26 Edit frequnency 27 Set duty cycle for square wave Enter duty cycle 28 Edit duty cycle 28 Set amplitude Normal output 29 Attenuate by 20dB 29 Set offset Activate offset 30 Adjust offse...

Page 27: ...m Triangle waveform OUTPUT 50 The waveform comes out from the main terminal 10Vp p maximum 50 load 20Vp p maximum no load Set the Frequency Enter the waveform frequency using the numerical keys 1 2 MH...

Page 28: ...frequency to 1MHz For full error message list see page52 Edit frequnency Left cursor key moves the active cursor left Right cursor key moves the active cursor right Turn the editing knob left to decr...

Page 29: ...l keys to enter value Example 45 MHz Delete a number backspace Edit duty cycle The editing knob changes the value and the cursor keys moves the active digit same as entering frequency When inactive fo...

Page 30: ...are triangle waveform can be attenuated by 20dB in two ways 40dB altogether Method1 Pull out the Amplitude knob The output amplitude is attenuated by 20dB no display sign 20dB 8 Method2 Press the shif...

Page 31: ...DJ OFFSET Turn the knob right higher position or left lower position The range is 5V 5V for 50 load Limitation Note that the output amplitude including the offset is still limited to 5 5V 50 load 10 1...

Page 32: ...Select the waveform 32 Set frequency Enter frequency 32 Edit frequency 33 Set duty cycle Enter duty cycle 33 Edit duty cycle 34 Set amplitude Set Amplitude 34 Artisan Technology Group Quality Instrume...

Page 33: ...nob to select the waveform Pushed TTL is selected as output Pulled CMOS is selected as output TTL CMOS OUTPUT The waveform comes out from the TTL CMOS terminal TTL 3Vp p fixed CMOS 4V 1Vp p 15 1Vp p S...

Page 34: ...to increase the frequency Set the Duty Cycle DUTY 7 Press the Shift key then 7 to enter duty cycle editing mode The duty sign appears on the display Enter duty cycle The default value is 50 The setta...

Page 35: ...lly goes back to previous mode frequency view Set Amplitude CMOS waveform TTL CMOS ADJ TTL CMOS 5V 15V Use the TTL CMOS knob Pushed selects TTL output with fixed amplitude min 3Vp p Pulled selects CMO...

Page 36: ...rm Sine Triangle Square page25 or TTL CMOS page31 2 Press the Shift key then 5 Sweep SWEEP 5 3 Sweep is activated and the sign appears on the display When the sweep is activated the duty cycle of Squa...

Page 37: ...the rating 4 7 10 or 20MHz In this case the frequency stays at the rating to the end Sweep span sets the frequency width of the sweep The current output frequency becomes the start frequency Rotate t...

Page 38: ...AM SWEEP SPAN 0 MAX 1 Pull the SWEEP SPAN knob AM 2 Turn the knob left shallow or right deep Set AM depth Range 0 100 SFG 2000 series uses an internal 400Hz sine wave as the default modulating signal...

Page 39: ...en 4 FM FM is activated and the sign appears on the display FM 4 When FM is activated the duty cycle of Square TTL CMOS wave is fixed to 50 The output frequency becomes the Center Frequency FM Dev AM...

Page 40: ...ter frequency Output frequency must be set within this range SFG 2104 300kHz 3 7MHz SFG 2107 300kHz 6 7MHz SFG 2110 300kHz 9 7MHz SFG 2120 300kHz 19 7MHz SFG 2000 series uses an internal 400Hz sine wa...

Page 41: ...T 4 The GATE sign flashes when the gate condition is met Range 0 150MHz Resolution 100nHz for 1Hz input 0 1Hz for 100MHz input Set the gate time Gate time sets the display update rate and counter reso...

Page 42: ...000kHz 1s 100 Hz 1 0000000kHz 1kHz 10s 10 Hz 1 00000000kHz 0 01s 10Hz 1 00000MHz 0 1s 1Hz 1 000000MHz 1s 100mHz 1 0000000MHz 1MHz 10s 10mHz 1 00000000MHz 0 01s 100Hz 10 0000MHz 0 1s 10Hz 10 00000MHz 1...

Page 43: ...the memory number 0 9 for example 1 The done sign appears RECALL 3 Press the Shift key then 3 to recall a panel setting stored in internal memories Memory range 0 9 10 set Recall the panel setting Th...

Page 44: ...default panel setting The done message appears The panel is updated with the default setting Wave type Sine wave Frequency 10 0000kHz TTL CMOS Disabled 20dB Disabled Modulation Disabled Sweep mode Di...

Page 45: ...am SFG series PLL Reference In Output 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 par...

Page 46: ...mpare the transistor input output waveform using the oscilloscope Adjust the DC voltage source to find out the maximum output without distorting the waveform Block diagram SFG series Oscilloscope Tran...

Page 47: ...g an oscilloscope Block diagram SFG series Oscilloscope Amplifier Triangle wave Load Amplifier Transient Characteristics Test Description Use the square wave output from SFG 2000 series to check the t...

Page 48: ...their explanations Amplitude reduction at low frequency No phase shift Transient characteristic list Low frequency boosted accentuated fundamental High frequency loss No phase shift Low frequency pha...

Page 49: ...Digital Circuit TTL CMOS Out Impedance Matching Network Test Description Use SFG 2000 series for impedance matching network testing its frequency characteristic and matching the impedance Block diagra...

Page 50: ...f audio speakers Record the volt reading versus the input signal frequency Block diagram Graph The peak voltage occurs on the resonant frequency of the speaker Frequency Hz Peak of Audio Drive Respons...

Page 51: ...response of an audio speaker Test description 1 Set SFG output to sine wave 20Hz 2 Activate sweep and set LIN LOG sweep time and sweep span 3 Change the frequency if other bands need to be tested Blo...

Page 52: ...then the relevant numerical key Do the same action as you entered those modes For example To get out of Counter mode press Shift then 1 The device accuracy does not match the specification Make sure...

Page 53: ...rger than specified See page38 for FM center frequency range Duty Cycle error duty Err1 Not square waveform This message appears when trying to set duty cycle in non square sine or triangle waveform F...

Page 54: ...G 2020 2120 Resolution 0 1Hz 1Hz for SFG 2020 2120 Stability 20ppm Accuracy 20ppm Frequency Aging 5ppm year Harmonic Distortion 55dBc 0 1Hz 200kHz 40dBc 0 2MHz 4MHz 30dBc 4MHz 20MHz Amplitude at maxim...

Page 55: ...00MHz Input Impedance 1M 150pf Frequency Counter SFG 2100 Series Sensitivity 35mVrms 5Hz 100MHz 45mVrms 100MHz 150MHz Store Recall 10 Groups of Setting Memories Power Source AC115V 230V 10 15 50 60Hz...

Page 56: ...ltage 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 Rad...

Page 57: ...etting recall 21 direct digital synthesis 10 display contents overview 14 duty cycle example setting 22 setup 28 duty cycle error 28 52 faq 51 E EN 61010 6 7 55 EN55011 55 EN61000 55 external modulati...

Page 58: ...6 symbol 5 UK power cord 8 setup step 20 sine wave example setting 22 selection 26 speaker application example 49 50 specification 53 FAQ 51 square wave duty cycle 28 example setting 22 selection 26 s...

Page 59: ...service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE IN...

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