GW Instek SFG-830 User manual
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Table of Contents
3
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 .............................................................................. 17
Setting up and Operating the Instruments ..........18
Setting up and Operating the Instruments ..........18
Setting up the Instrument ........................................................ 18
Operating the Instrument......................................................... 19
Calibrating the Instruments...............................21
Calibrating the Instruments...............................21
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 ............................................................ 35
DC Gain and Offset.................................................................. 36
Verifying and Adjusting the Instruments ............37
Preparing for Verifications ....................................................... 38
SFG-830 Service Manual
4
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
Sine Wave Amplitude (1Vrms) ...................................................54
Square Wave Amplitude ............................................................54
Triangle Wave Amplitude ..........................................................55
DC Offset Accuracy ..................................................................55
Sub-Harmonics........................................................................56
Harmonic Distortions (100kHz) ..............................................56
Harmonic Distortions (500kHz) ..............................................57
Phase Noise.............................................................................57
Square Wave Rise Time .............................................................58
Square Wave Symmetry.............................................................58
AM Envelope Distortion ............................................................59
Remote Control Settings...........................................................59
Changing the Options .......................................60
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
Disassembling the Instrument ...........................65
List of Equipments ...................................................................65
Top Outer Casing.....................................................................66
Top PCB ..................................................................................68
Bottom Outer Casing ................................................................69
Bottom PCB .............................................................................71
Power Supply PCB ....................................................................72
Table of Contents
5
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) ............................................. 83
Front Panel PCB (FG01P010) ..................................................... 84
Top PCB (FG01P030) 1/6.......................................................... 85
Top PCB (FG01P030) 2/6.......................................................... 86
Top PCB (FG01P030) 3/6.......................................................... 87
Top PCB (FG01P030) 4/6.......................................................... 88
Top PCB (FG01P030) 5/6.......................................................... 89
Top PCB (FG01P030) 6/6.......................................................... 90
Bottom PCB (FG01P050) 1/5 ..................................................... 91
Bottom PCB (FG01P050) 2/5 ..................................................... 92
Bottom PCB (FG01P050) 3/5 ..................................................... 93
Bottom PCB (FG01P050) 4/5 ..................................................... 94
Bottom PCB (FG01P050) 5/5 ..................................................... 95
Ordering the Parts ............................................96
PCB Locations ......................................................................... 97
PCB Mounted Parts .................................................................. 98
Top PCB Parts Layout (FG01P030) ........................................... 107
Bottom PCB Parts Layout (FG01P050) ...................................... 108
Front Panel PCB Layout (FG01P010) 1 ..................................... 109
Front Panel PCB Layout (FG01P010) 2 ..................................... 110
Front Panel PCB Layout (FG01P010) 3 ..................................... 111
GPIB PCB Parts Layout (FG01P060) .......................................... 112
Power Supply PCB Parts Layout (FG01P020) ............................. 112
Non-PC Mounted Parts .......................................................... 113
SFG-830 Service Manual
6
SAFETY INSTRUCTIONS
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(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.
Power supply
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(Note) EN 61010-1:2001 specifies the pollution degrees and their requirements as
follows. This instrument falls under degree 2.
Pollution is defined as “addition of foreign matter, solid, liquid, or gaseous
(ionized gases), that may produce a reduction in dielectric strength or surface
resistivity”.
Pollution degree 1: No pollution or only dry, non-conductive pollution occurs. The
pollution has no influence.
Pollution degree 2: Normally only non-conductive pollution occurs. Occasionally,
SFG-830 Service Manual
8
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.
Storage
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Power cord for the United Kingdom
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NOTE: This lead / appliance must only be wired by competent persons
WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in accordance with the following code:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live (Phase)
As the colours of the wires in mains leads may not correspond with the colour markings identified
in your plug/appliance, proceed as follows:
The wire which is coloured Green & Yellow must be connected to the Earth terminal marked with
the letter E or by the earth symbol or coloured Green or Green & 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 0.75mm2should 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 & 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.
Safety Instructions
9
Declaration of Conformity
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: 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).
For the evaluation regarding the Electromagnetic Compatibility and Low Voltage
Directive, the following standards were applied:
۔EMC
EN50081-1: Electromagnetic
compatibility - (1992) Generic emission
standard
Part 1: Residential, commercial and light
industry
EN50082-1: Electromagnetic compatibility -
(1992) Generic immunity standard
Part 1: Residential, commercial and light
industry
Conducted Emission
Radiated Emission
EN 55022: Class A 1994
Electrostatic Discharge
IEC 1000-4-2: 1995
Current Harmonics
EN 61000-3-2 + A12: 1996
Radiated Immunity
IEC 1000-4-3: 1995
Voltage Fluctuations
EN 61000-3-3: 1995
Electrical Fast Transients
IEC 1000-4-4: 1995
Electrostatic Discharge
EN 61000-4-2: 1995 + A1:1998
Surge Immunity
IEC 1000-4-5: 1995
Radiated Immunity
EN 61000-4-3: 1996 + A1: 1998
Voltage Dip/ Interruption
IEC 1000-4-11: 1994
EN50081-1: Electromagnetic compatibility - (1992) Generic emission standard
Part 1: Residential, commercial and light industry
Conducted Emission
Radiated Emission
EN 55011: Class A 1991
۔Safety
Low Voltage Equipment Directive 73/23/EEC
Safety Requirements
IEC/EN 61010-1: 1993 + A2 (1995)
SFG-830 Service Manual
10
OVERVIEW OF THIS MANUAL
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Learn how to set
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Overview of this Manual
11
Summary of Each Chapter
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Safety Instructions
(page6)
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Overview of this
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Specifications and
Appearance
(page13)
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Setting up and
Operating the
Instrument
(page15)
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Calibrating the
instrument
(page21)
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Verifying and
Adjusting the
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SFG-830 Service Manual
12
instrument
(page34) x
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Changing the
Options (page53)
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Disassembling the
instrument
(page65)
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Troubleshooting
the instrument
(page73)
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(page96)
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Specifications and Appearance
13
SPECIFICATIONS AND
APPEARANCE
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Specifications ......................................................................... 13
Front Panel ............................................................................. 15
Specifications
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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
Sine 20mHzFrequency
Resolution Square 20mHz
Triangle 10mHz
Ramp 10mHz
Frequency Accuracy ±10ppm
Frequency Aging ±5ppm/year
Output Impedance Source Impedance 50±10%
Range 10mV to 10Vpp (into 50)
8 amplitude range, |Vac peak| + |Vdc| 5V
Resolution 3 digits
Amplitude
Accuracy ±0.5dB (±5mVrms, sine out)
±12% (±5mVrms, square out)
±5% (±5mVrms, triangle out)
±5% (±5mVrms, arbitrary out)
DC Offset Range Ʋ5V (into 50)
|Vac peak| + |Vdc| 5V
Resolution 3 digits
Accuracy ±1.5% of setting + 1mV
Sync Output TTL levelsSync Output
Sync Fan-Out > 10 TTL load
Sine Output Harmonics DC to 100kHz: -50dBc
0.1MHz to 1MHz: -40dBc
1MHz to 10MHz: -30dBc
10MHz to 30MHz: -25dBc
SFG-830 Service Manual
14
Square Output Rise/Fall Time 15ns
Overshoot 5% (at full scale output)
Asymmetry Ʋ1% of period + 4ns
Triangle and Ramp
Output
Linearity Ʋ0.1% of full scale output
Arbitrary
Waveforms
Sample Rate 42.949600MHz / N, N = 8, 10, 12……215
Waveform Length 12000 points max
Vertical Resolution 12 bits
Sweep Sweep Functions Lin or Log
Sweep Range 20mHz to 30MHz
Sweep Time 0.001s to 1000s
AM Modulation Function External, internal (sine, triangle, ramp,
square)
Modulation Rate 10mHz to 10kHz, internal
50kHz, external
Modulation Span 0 to 100%
External Input Ʋ5V for 100% modulation
Ext Input
Impedance
100k
FM Modulation Function Sine, triangle, ramp, square
Modulation Rate 10mHz to 10kHz
Modulation Span 30MHz (100kHz for triangle, ramp)
PM Modulation Modulation Span 360°
Modulation Rate 20mHz to 10kHz
Operation
Environment
Indoor use, Altitude < 2000m
Ambient temperature: 0Υto 40Υ
Relative humidity: 80% (maximum)
Installation category II, Pollution degree 2
Storage
Environment
Ambient temperature: –10Υto 70Υ
Relative humidity: 70% (maximum)
Power Source 100V/120V/220V/240V ± 10% 50/60Hz
Accessories User Manual x 1, Test Lead GTL-110 x 1
Dimensions 214(W) ×89(H) ×370(D) mm
Weight Approx. 6.5kg
Specifications and Appearance
15
Front Panel
1 Power button Turns the instrument on or off.
2 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.
3 Entry keys [ 0 ] ~ [ 9 ], [ . ], and [ ± ] keys input numerical value. A unit
key should be pressed to confirm the entered value.
[ CLR ] key cancels the edit and brings back the previously
entered value.
[ STOR ] key stores system settings into the memory.
[ RECL ] key recalls system settings from the memory.
4 Shift key Selects the shift mode. The SHIFT LED will also lights up.
For example, pressing [SHIFT] + [DEFAU] can recall the
default value of the instrument.
5 Sweep /
Modulation
keys
Control sweep and modulation.
[< ] and [ >] keys select carrier waveform.
[AM], [FM], and [PM] keys set modulation mode.
[ LIN ] and [ LOG ] keys set sweep method.
[ MOD ON/OFF ] key initiates the sweep or modulation
function.
For details regarding [STAR], [STOP], [SPAN], and [RATE]
SFG-830 Service Manual
16
keys, refer to the user manual.
6 Modification
keys
Set the size and step mode, increasing or decreasing.
7 Function keys Control the output functions.
[ <] and [ >] keys select the output signal from arbitrary
wave (ARB), sine wave, triangle wave, etc.
[ FREQ ] key sets the output frequency.
[ AMPL ] key sets the output amplitude.
[ OFFSET ] key sets the output DC offset level.
[ PHASE ] key sets the phase in the PSK modulation mode.
8 Main output
BNC terminal
Outputs all main signals. Output resistance is 50ˑ.
9 Sync output
BNC terminal
Outputs TTL-level sync signal.
10 Interface LEDs Indicate the current status when the instrument is
remotely controlled via the GPIB interface bus.
11 Parameter
display
Presents the parameter values and the current status.
12 Unit/Function
LED
Indicate the unit of the figures on the display and the
functions that are currently being used.
Setting up and Operating the Instruments
17
Rear Panel
1 AC socket Accepts the AC input within line voltage±10%, 50/60Hz.
2 EXT AM
modulation
BNC input
Accepts external amplitude modulation input. The
modulation index is 100% at ±5V input. The input
resistance is 100kˑ.
3 Sweep /
Modulation
output
Outputs the modulated waveform that is synchronous with
the Sweep / Modulation function (±5Vpp Max.)
4 RS232C
connector
Accepts the serial RS232 interface. The DCE and Baud rate
range is 300 to 19.2k.
5 GPIB connector Accepts the GPIB (IEEE488.2 and SCPI) communication
interface.
SFG-830 Service Manual
18
SETTING UP AND OPERATING
THE INSTRUMENTS
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Setting up the Instrument.........................................................18
Operating the Instrument .........................................................19
Setting up the Instrument
Checking the AC
rating
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Setting up and Operating the Instruments
19
Operating the Instrument
Selecting the output
function
®
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frequency
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Setting the output
amplitude
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Setting up the DC
offset
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Displaying the
sweep frequency
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Recalling the
default status
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SFG-830 Service Manual
20
Setting up the ARB
compiler
Ú
ȱ
Ê ¬
ȱ
Û
ȱ
Ù
ȱ
Ú
ȱ
ȱ
Û
ȱ
Ê
7 :
ȱ
ȱ
:
7
ȱ
2
9 :
2
3
Ȭ
2
7
ȱ
;
9 7
ȱ
Displaying the last
received ASCII data
Ú
ȱ
Ê ¬
ȱ
Û
ȱ
Ù
ȱ
Ú
ȱ
ȱ
Û
ȱ
9
2 3
ȱ
:
7
ȱ
2
:
ȱ
4§¨
ȱ
3
: 7
ȱ
;
ȱ
Ê
ȱ
8
2
:
2
ȱ
7 7 9 7 8
ȱ
3
ȱ
:
7
ȱ
ʬ
Ȭ
6«5
ȱ
Recalling the GPIB
settings
Ú
ȱ
Ê ¬
ȱ
Û
ȱ
Ù
ȱ
Ú
ȱ
ȱ
Û
ȱ
7
2
ȱ
ȱ
7 : : 9 <
ȱ
; <
ȱ
:
7
ȱ
8 9
2 3
ȱ
7
ȱ
2
;
ȱ
7
3
ȱ
9 <
ȱ
:
7
ȱ
1
Ø
¬ ß
ȱ
7 : 9 ; <
ȱ
: <
ȱ
:
7
ȱ
ȱ
; <
¢
;
ȱ
Selecting the GPIB
address
Ú
ȱ
Ê ¬
ȱ
Û
ȱ
Ù
ȱ
Ú
ȱ
ȱ
Û
ȱ
Ê
7 7 :
ȱ
:
7
ȱ
ȱ
2
8 8 7
¦
ȱ
5
ȱ
: ;
ȱ
« 5
ȱ
Switching from the
remote mode to
local mode
Ú
ȱ
Ê ¬
ȱ
Û
ȱ
Ù
ȱ
Ú
ȱ
¯ Ø
¯
ȱ
Û
ȱ
Ê
9 :
7
ȱ
:
7
ȱ
7 ; : 7
ȱ
:
2
:
ȱ
7 : 77<
ȱ
1
7 ; : 7
ȱ
2
< 8
ȱ
¯ Ø
¯
ȱ
; 8 7
ȱ
Turning on the
RS-232C
Ú
ȱ
Ê ¬
ȱ
Û
ȱ
Ù
ȱ
Ú
ȱ
Ê4«4
ȱ
Û
ȱ
<
ȱ
:
7
ȱ
Ê4«4
ȱ
; <
¢
;
ȱ
2
< 8
ȱ
2
;
ȱ
7 : : 9 <
ȱ
:
7
ȱ
2
8
ȱ
2
: 7
ȱ
Switching cursor
point in ARB
compiling mode
Ú
ȱ
Ê ¬
ȱ
Û
ȱ
Ù
ȱ
Ú
ٻ
Û
ȱ
;
ȱ
Ú
څ
Û
ȱ
7 <
ȱ
;
9 9 <
ȱ
2
<
ȱ
2
9 :
2
3
ȱ
2
7
¦
ȱ
9 :
7
ȱ
:
7
ȱ
9 <
9 <
ȱ
; 9 : 9 ; <
ȱ
7 : 77<
ȱ
<
7
ȱ
2
< 8
ȱ
;
ȱ
; 9 < :
ȱ
This manual suits for next models
1
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