GW Instek SFG-830 Service Manual
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GW Instek SFG-830 Service Manual

Arbitrary function generator
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  • Page 2 Windows is a registered trademark of Microsoft Corporation in the United States and other countries.

  • Page 3: Table Of Contents

    Table of Contents Table of Contents Safety Instructions ..........6 Declaration of Conformity ............9 Overview of this Manual ........10 Shortcuts to Major Operations ..........10 Summary of Each Chapter ............11 Specifications and Appearance ......13 Specifications ................. 13 Front Panel ................15 Rear Panel ................
  • Page 4 SFG-830 Service Manual List of Equipments ..............39 Verification Log ...............40 Clock Output ................44 Frequency Doubler ..............45 D/A Reference .................46 Amplitude (100Hz)..............47 Amplitude (10kHz) ..............48 Amplitude (500kHz - 1) ............49 Amplitude (500kHz - 2) ............50 Filter..................51 Harmonic Distortion..............52 Frequency Accuracy ..............53 Sine Wave Amplitude (3.54Vrms) ..........53...
  • Page 5 Table of Contents Troubleshooting the Instrument ......73 List of Equipments ..............74 List of Equipments ..............74 System Block Diagram ............. 75 Operation Theory ..............76 DDS Technology Overview............78 PCB Locations ................. 79 Block Diagram................. 81 RS-232C/GPIB PCB (FG01P010-3, FG01P020, FG01P060) ... 82 DC Power Supply PCB (FG01P020) ..........

  • Page 6: Safety Instructions

    SFG-830 Service Manual AFETY NSTRUCTIONS Safety Symbols WARNING CAUTION Safety Guidelines General guidelines CAUTION...
  • Page 7 Safety Instructions (Note) EN 61010-1:2001 specifies the measurement categories and their requirements as follows. This instrument falls under category II. Measurement category IV is for measurement 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 on the circuits directly connected to the low voltage installation.
  • Page 8 SFG-830 Service Manual however, a temporary conductivity caused by condensation can be expected. Pollution degree 3: Conductive pollution occurs, or dry, non-conductive pollution occurs which becomes conductive due to the expected condensation. In such conditions, while the equipment is normally protected against exposure to direct sunlight, precipitation, and strong draughts, neither temperature nor humidity is controlled.

  • Page 9: Declaration Of Conformity

    Type of Product: Arbitrary Signal Generator Model Number: SFG-830/SFG-830G 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 (2004/108/EC, 89/336/EEC, 92/31/EEC, 93/68/EEC) and Low Voltage Directive (73/23/EEC, 93/68/EEC).

  • Page 10: Overview Of This Manual

    SFG-830 Service Manual VERVIEW OF THIS ANUAL Shortcuts to Major Operations I want to… Go to… Page Learn how to set the instrument and operate it Verify the specifications of the instrument Verify the specifications and adjust the instrument Disassembly the...

  • Page 11: Summary Of Each Chapter

    Overview of this Manual Summary of Each Chapter Safety Instructions (page6) Overview of this Manual (page10) Specifications and Appearance (page13) Setting up and Operating the Instrument (page15) Calibrating the instrument (page21) Verifying and Adjusting the...
  • Page 12 SFG-830 Service Manual instrument (page34) Changing the Options (page53) Disassembling the instrument (page65) Troubleshooting the instrument (page73) Ordering the Parts (page96)

  • Page 13: Specifications And Appearance

    Specifications and Appearance PECIFICATIONS AND PPEARANCE Specifications ................. 13 Front Panel ................15 Specifications Output Function Sine, Triangle, Ramp, Square, Sync Output, Arbitrary Wave Frequency Range Sine 20mHz to 30MHz Square 20mHz to 30MHz Triangle 100mHz to 100kHz Ramp 100mHz to 100kHz Frequency Sine 20mHz...
  • Page 14 SFG-830 Service Manual Square Output Rise/Fall Time 15ns Overshoot 5% (at full scale output) Asymmetry 1% of period + 4ns Triangle and Ramp Linearity 0.1% of full scale output Output Arbitrary Sample Rate 42.949600MHz / N, N = 8, 10, 12……2...

  • Page 15: Front Panel

    Specifications and Appearance Front Panel Power button Turns the instrument on or off. Unit keys In the ‘Normal’ mode, the Unit keys assign the unit and set the entered value. In the ‘Store’ or ‘Recall’ mode, the Unit keys work as ‘Enter’ keys.
  • Page 16 SFG-830 Service Manual keys, refer to the user manual. Modification Set the size and step mode, increasing or decreasing. keys Function keys Control the output functions. [ <] and [ >] keys select the output signal from arbitrary wave (ARB), sine wave, triangle wave, etc.

  • Page 17: Rear Panel

    Setting up and Operating the Instruments Rear Panel AC socket Accepts the AC input within line voltage±10%, 50/60Hz. EXT AM Accepts external amplitude modulation input. The modulation modulation index is 100% at ±5V input. The input BNC input resistance is 100k . Sweep / Outputs the modulated waveform that is synchronous with Modulation...

  • Page 18: Setting Up And Operating The Instruments

    SFG-830 Service Manual ETTING UP AND PERATING NSTRUMENTS Setting up the Instrument ............18 Operating the Instrument ............19 Setting up the Instrument Checking the AC rating Connecting the power cord Turning the power...

  • Page 19: Operating The Instrument

    Setting up and Operating the Instruments Operating the Instrument Selecting the output function Setting the output (Example) frequency Setting the output (Example) amplitude Setting up the DC (Example) offset Displaying the sweep frequency Recalling the default status...
  • Page 20 SFG-830 Service Manual Setting up the ARB compiler Displaying the last received ASCII data Recalling the GPIB settings Selecting the GPIB address Switching from the remote mode to local mode Turning on the RS-232C Switching cursor point in ARB compiling mode...

  • Page 21: Calibrating The Instruments

    Calibrating the Instruments ALIBRATING THE NSTRUMENTS Preparing for Calibrations ............22 List of Equipments ..............22 Entering the Calibration Mode ..........23 Calibration Log ............... 24 Attenuator ................33 Sine Wave Amplitude ............... 34 Square Wave Amplitude ............34 Triangle Wave Amplitude ............35 Square Wave Symmetry ............

  • Page 22: Preparing For Calibrations

    SFG-830 Service Manual Preparing for Calibrations Note Calibration items When to run calibrations Calibration Environments Calibration procedure Default settings List of Equipments Item Requirements Recommended Voltmeter (Multimeter) Oscilloscope Distortion meter...

  • Page 23: Entering The Calibration Mode

    Calibrating the Instruments Entering the Calibration Mode Entering the calibration mode (Display) (Calibration ID) (Value) Moving the cursor Changing the calibration ID or value...

  • Page 24: Calibration Log

    SFG-830 Service Manual Calibration Log Attenuator Min limit Result Max limit Pass/Fail 38.9mV _______mV 39.1mV Pass Fail 77.5mV _______mV 78.5mV Pass Fail 155mV _______mV 157mV Pass Fail 311mV _______mV 313mV Pass Fail 623mV _______mV 627mV Pass Fail 1.24V _______V 1.26V...
  • Page 25 Calibrating the Instruments Sine wave amplitude (even ID: 3.54Vrms 0.01V, odd ID: 1.77 0.005Vrms) Result Pass/Fail Result Pass/Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail Pass Fail _______Vrms Pass Fail _______Vrms _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms...
  • Page 26 SFG-830 Service Manual Sine wave amplitude (even ID: 3.54Vrms 0.01V, odd ID: 1.77 0.005Vrms) Result Pass/Fail Result Pass/Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms...
  • Page 27 Calibrating the Instruments Sine wave amplitude (even ID: 3.54Vrms 0.01V, odd ID: 1.77 0.005Vrms) Result Pass/Fail Result Pass/Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms...
  • Page 28 SFG-830 Service Manual Sine wave amplitude (even ID: 3.54Vrms 0.01V, odd ID: 1.77 0.005Vrms) Result Pass/Fail Result Pass/Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms Pass Fail _______Vrms...
  • Page 29 Calibrating the Instruments Square wave amplitude (10 1Vpp) Result Pass/Fail Result Pass/Fail _________Vpp Pass Fail _________Vpp Pass Fail _________Vpp Pass Fail _________Vpp Pass Fail Pass Fail _________Vpp Pass Fail _________Vpp _________Vpp Pass Fail _________Vpp Pass Fail _________Vpp Pass Fail _________Vpp Pass Fail _________Vpp...
  • Page 30 SFG-830 Service Manual Square wave amplitude (10 1Vpp), Triangle wave amplitude (10Vpp) Result Pass/Fail Result Pass/Fail _________Vpp Pass Fail _________Vpp Pass Fail _________Vpp Pass Fail _________Vpp Pass Fail Pass Fail _________Vpp Pass Fail _________Vpp _________Vpp Pass Fail _________Vpp Pass Fail...
  • Page 31 Calibrating the Instruments Square wave symmetry (406 to 438: 50% 1%, 438 to 460: 48% Result Pass/Fail Result Pass/Fail _________% Pass Fail _________% Pass Fail _________% Pass Fail _________% Pass Fail Pass Fail _________% Pass Fail _________% _________% Pass Fail _________% Pass Fail...
  • Page 32 SFG-830 Service Manual Square wave symmetry (438 to 460: 48% 1%, 461 to 486: 45% 1%, 487 to 502: Result Pass/Fail Result Pass/Fail _________% Pass Fail _________% Pass Fail _________% Pass Fail _________% Pass Fail _________% Pass Fail _________% Pass...

  • Page 33: Attenuator

    Calibrating the Instruments Attenuator Accepted range Value Value Equipment Configurations Calibration procedure Calibrating the attenuator is completed: move to the next step.

  • Page 34: Sine Wave Amplitude

    SFG-830 Service Manual Sine Wave Amplitude Accepted range Even ID Value Odd ID Value 114 to 115 to Equipment Configurations Calibration procedure Calibrating the sine wave amplitude is completed: move to the next step. Square Wave Amplitude Accepted range Value...

  • Page 35: Triangle Wave Amplitude

    Calibrating the Instruments Triangle Wave Amplitude Accepted range Value Equipment Configurations Calibration procedure Calibrating the triangle wave amplitude is completed: move to the next step. Square Wave Symmetry Accepted range Value Value 406 to 437 438 to 460 461 to 486 487 to 502 Equipment Configurations...

  • Page 36: Dc Gain And Offset

    SFG-830 Service Manual DC Gain and Offset Accepted range Value 503 (Sine wave) 504 (Square wave) 505 (Triangle wave) 506 to 602 (Offset) Equipment Configurations Calibration procedure Calibrating the DC gain and offset are completed. This concludes the calibration.

  • Page 37: Verifying And Adjusting The Instruments

    Verifying and Adjusting the Instruments ERIFYING AND DJUSTING NSTRUMENTS Preparing for Verifications ............38 List of Equipments ..............39 Verification Log............... 40 Clock Output ................44 Frequency Doubler ..............45 D/A Reference ................ 46 Amplitude (100Hz) ..............47 Amplitude (10kHz) ..............48 Amplitude (500kHz - 1) ............

  • Page 38: Preparing For Verifications

    SFG-830 Service Manual Preparing for Verifications Note Verification and adjustment items When to run verifications Verification Environments Verification procedure Default settings...

  • Page 39: List Of Equipments

    Verifying and Adjusting the Instruments List of Equipments Item Requirements Recommended Voltmeter (Multimeter) Frequency Counter (Multimeter) Oscilloscope Spectrum analyzer Distortion meter Phillips screwdriver Minus screwdriver...

  • Page 40: Verification Log

    SFG-830 Service Manual Verification Log Clock output Item Min limit Result Max limit Pass/Fail Output frequency 10MHz-20Hz _______MHz 10MHz+20Hz Pass Fail Frequency doubler Item Min limit Result Max limit Pass/Fail U303 pin6 output __________ Pass Fail D/A reference Item Min limit...
  • Page 41 Verifying and Adjusting the Instruments Amplitude (500kHz-2) Item Min limit Result Max limit Pass/Fail Square wave __________ 5% overshoot Pass Fail Filter Item Min limit Result Max limit Pass/Fail Ripple __________ Pass Fail Harmonic distortion Item Min limit Result Max limit Pass/Fail Distortion __________...
  • Page 42 SFG-830 Service Manual Square wave amplitude Item Min limit Result Max limit Pass/Fail 100Hz amplitude _______Vpp Pass Fail 1kHz amplitude _______Vpp Pass Fail 10kHz amplitude _______Vpp Pass Fail 1MHz amplitude Pass Fail _______Vpp 2MHz amplitude _______Vpp Pass Fail 4MHz amplitude...
  • Page 43 Verifying and Adjusting the Instruments Harmonic distortions ( 100kHz) Item Min limit Result Max limit Pass/Fail 100Hz sine wave _______dBc Pass Fail 1kHz sine wave _______dBc Pass Fail 10kHz sine wave _______dBc –50dBc Pass Fail 50kHz sine wave _______dBc Pass Fail 100kHz sine wave _______dBc...

  • Page 44: Clock Output

    SFG-830 Service Manual Clock Output Accepted range Equipment Configurations Verification procedure X202 location: Top PCB Close-up Verifying/adjusting the clock output is completed...

  • Page 45: Frequency Doubler

    Verifying and Adjusting the Instruments Frequency Doubler Accepted range Equipment Configurations Verification procedure SVR301 location: Top PCB Close-up Verifying/adjusting the frequency doubler is completed...

  • Page 46: D/A Reference

    SFG-830 Service Manual D/A Reference Accepted range Equipment Configurations Verification procedure SVR201 location: Top PCB Close-up Verifying/adjusting the D/A reference is completed...

  • Page 47: Amplitude (100Hz)

    Verifying and Adjusting the Instruments Amplitude (100Hz) Accepted range Equipment Configurations Verification procedure SVR604 location: Bottom PCB Close-up Verifying/adjusting the Amplitude (100Hz) is completed...

  • Page 48: Amplitude (10Khz)

    SFG-830 Service Manual Amplitude (10kHz) Accepted range Equipment Configurations Verification procedure SVR601 location: Bottom PCB Close-up Verifying/adjusting the Amplitude (10kHz) is completed...

  • Page 49: Amplitude (500Khz - 1)

    Verifying and Adjusting the Instruments Amplitude (500kHz - 1) Accepted range Equipment Configurations Verification procedure SVR602 location: Bottom PCB Close-up Verifying/adjusting the Amplitude (500kHz - 1) is completed...

  • Page 50: Amplitude (500Khz - 2)

    SFG-830 Service Manual Amplitude (500kHz - 2) Accepted range Equipment Configurations Verification procedure SVC601 location: Bottom PCB Close-up Verifying/adjusting the Amplitude (500kHz - 2) is completed...

  • Page 51: Filter

    Verifying and Adjusting the Instruments Filter Accepted range Equipment Configurations Verification procedure SVC301, 302, 303, 304 location: Top PCB Close-up Verifying/adjusting the Filter is completed...

  • Page 52: Harmonic Distortion

    SFG-830 Service Manual Harmonic Distortion Accepted range Equipment Configurations Verification procedure SVR501, 603 location: Top PCB Close-up Verifying/adjusting the Harmonic Distortion is completed...

  • Page 53: Frequency Accuracy

    Verifying and Adjusting the Instruments Frequency Accuracy Accepted range Equipment Configurations Verification procedure Verifying the Harmonic Distortion is completed Sine Wave Amplitude (3.54Vrms) Accepted range Equipment Configurations Verification procedure Verifying the Sine wave amplitude (3.54Vrms) is completed...

  • Page 54: Sine Wave Amplitude (1Vrms)

    SFG-830 Service Manual Sine Wave Amplitude (1Vrms) Accepted range Equipment Configurations Verification procedure Verifying the Sine wave amplitude (1Vrms) is completed Square Wave Amplitude Accepted range Equipment Configurations Verification procedure Verifying the Square wave amplitude is completed...

  • Page 55: Triangle Wave Amplitude

    Verifying and Adjusting the Instruments Triangle Wave Amplitude Accepted range Equipment Configurations Verification procedure Verifying the Triangle wave amplitude is completed DC Offset Accuracy Accepted range Equipment Configurations Verification procedure Verifying the DC offset is completed...

  • Page 56: Sub-Harmonics

    SFG-830 Service Manual Sub-Harmonics Accepted range Equipment Configurations Verification procedure Verifying the Sub-harmonics is completed Harmonic Distortions ( 100kHz) Accepted range Equipment Configurations Verification procedure Verifying the Harmonic distortions ( 100kHz) is completed...

  • Page 57: Harmonic Distortions ( 500Khz)

    Verifying and Adjusting the Instruments Harmonic Distortions ( 500kHz) Accepted range Equipment Configurations Verification procedure Verifying the Harmonic distortions ( 500kHz) is completed Phase Noise Accepted range Equipment Configurations Verification procedure Verifying the Phase Noise is completed...

  • Page 58: Square Wave Rise Time

    SFG-830 Service Manual Square Wave Rise Time Accepted range Equipment Configurations Verification procedure Verifying the Square wave rise time is completed Square Wave Symmetry Accepted range Equipment Configurations Verification procedure Verifying the Square wave symmetry is completed...

  • Page 59: Am Envelope Distortion

    Verifying and Adjusting the Instruments AM Envelope Distortion Accepted range Equipment Configurations Verification procedure Verifying the AM envelope distortion is completed Remote Control Settings Accepted range Equipment Configurations Verification procedure Verifying the remote control settings is completed...

  • Page 60: Changing The Options

    SFG-830 Service Manual HANGING THE PTIONS List of Equipments ..............60 Installing/Removing the GPIB Module ........61 Changing the AC Mains Voltage ..........62 Replacing the Mains Fuse ............63 Replacing the Internal Fuse ............64 List of Equipments Item Requirements Used in Phillips screwdriver...

  • Page 61: Installing/Removing The Gpib Module

    Changing the Options Installing/Removing the GPIB Module WARNING Procedure Note Installing/Removing the GPIB module is completed...

  • Page 62: Changing The Ac Mains Voltage

    SFG-830 Service Manual Changing the AC Mains Voltage Procedure Changing the AC mains voltage is completed...

  • Page 63: Replacing The Mains Fuse

    Changing the Options Replacing the Mains Fuse WARNING Rating Model AC110/120V AC220V/230V Procedure Replacing the main fuse is completed...

  • Page 64: Replacing The Internal Fuse

    SFG-830 Service Manual Replacing the Internal Fuse WARNING Rating Procedure (F101/F102) Procedure (F103/F104) Replacing the internal fuses is completed...

  • Page 65: Disassembling The Instrument

    Disassembling the Instrument ISASSEMBLING THE NSTRUMENT List of Equipments ..............65 Top Outer Casing ..............66 Top PCB.................. 68 Bottom Outer Casing ............... 69 Bottom PCB ................71 Power Supply PCB ..............72 List of Equipments Item Requirements Used in Phillips screwdriver Minus screwdriver Plier...

  • Page 66: Top Outer Casing

    SFG-830 Service Manual Top Outer Casing...
  • Page 67 Disassembling the Instrument Disassembling the top outer casing is completed...

  • Page 68: Top Pcb

    SFG-830 Service Manual Top PCB Disassembling the top PCB is completed...

  • Page 69: Bottom Outer Casing

    Disassembling the Instrument Bottom Outer Casing If the top casing has not been removed If the top casing has already been removed...
  • Page 70 SFG-830 Service Manual Disassembling the bottom outer casing is completed...

  • Page 71: Bottom Pcb

    Disassembling the Instrument Bottom PCB Disassembling the bottom PCB is completed...

  • Page 72: Power Supply Pcb

    SFG-830 Service Manual Power Supply PCB Disassembling the power supply PCB is completed...

  • Page 73: Troubleshooting The Instrument

    Troubleshooting the Instrument ROUBLESHOOTING THE NSTRUMENT List of Equipments ..............74 System Block Diagram ............. 75 Operation Theory ..............76 DDS Technology Overview............78 PCB Locations ................. 79 Block Diagram................. 81 RS-232C/GPIB PCB (FG01P010-3, FG01P020, FG01P060) ... 82 DC Power Supply PCB (FG01P020) ..........83 Front Panel PCB (FG01P010) .............

  • Page 74: List Of Equipments

    SFG-830 Service Manual List of Equipments Item Requirements Used in Digital Multimeter Electronic Load Phillips screwdriver Minus screwdriver Plier Soldering kit...

  • Page 75: System Block Diagram

    Troubleshooting the Instrument System Block Diagram...

  • Page 76: Operation Theory

    SFG-830 Service Manual Operation Theory Overview Sine Waveform Square Waveform Triangle Waveform Ramp Waveform...
  • Page 77 Troubleshooting the Instrument AM Modulation Sweep (Sine and Square Wave) Sweep (Triangle and Ramp Wave) FM Modulation...

  • Page 78: Dds Technology Overview

    SFG-830 Service Manual DDS Technology Overview Overview Block diagram...

  • Page 79: Pcb Locations

    Troubleshooting the Instrument PCB Locations Top PCB (FG01P030) DC Power Supply PCB (FG01P020) Bottom PCB (FG01P050) Front Panel PCB (FG01P010-1, -2) GPIB PCB (FG01P060) GPIB Connector PCB (FG01P010-3)

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