GW Instek GFG-3015 User Manual

Function Generator

GFG-3015

USER MANUAL

GW INSTEK PART NO. 82FG-30150MC1

ISO-9001 CERTIFIED MANUFACTURER

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 C ounty 236, Taiwan.

Table of Contents Page

1. Precautions.......................................................................................................................2

2. Product Introduction........................................................................................................5

3. Features ............................................................................................................................6

4. Specifications...................................................................................................................7

5. Front and Rear Panels ...................................................................................................10

6. Operation ........................................................................................................................18

6.1 The First Step Setup For Instrument...................................................................18

6.2 The Setup of Output Function .............................................................................18

6.3 The Setup of Frequency.......................................................................................18

6.4 The Setup of Amplitude........................................................................................19

6.5 The Setup of Offset...............................................................................................19

6.6 The Setup of Duty.................................................................................................20

6.7 The Setting of STORE...........................................................................................20

6.8 The Setting of RECALL ........................................................................................20

6.9 The SHIFT Key and Function Keys......................................................................21

6.10 Setup of LIN or LOG Sweep ...............................................................................21

6.11 Setup of AM Modulation.....................................................................................25

6.12 Setup of FM Modulation .....................................................................................26

6.13 Setup of Trigger..................................................................................................28

6.14 Setup of GATE and BURST................................................................................30

6.15 Setup of External Counter..................................................................................32

6.16 THE VCF Function ..............................................................................................34

6.17 THE GCV Output Function .................................................................................35

6.18 THE TTL Signal Output Function.......................................................................36

6.19 THE SYNC Signal Output Function ...................................................................36

6.20 Remote Control - RS232 Interface .....................................................................36

6.21 Commands Syntax..............................................................................................38

6.22 The Commands of RS-232 Serial Interface .......................................................41

6.23 The Examples of the Communication Interface Software................................44

6.24 The Error message of instrument......................................................................47

7. The Block Diagram and Description of the System .....................................................48

iii

EC Declaration of Conformity

GOOD WILL INSTRUMENT CO., LTD.

No. 7-1, Jhongsing Rd, Tucheng City,Taipei County 236, Taiwan

GOOD WILL INSTRUMENT (SUZHOU) CO., LTD.

No. 69, Lushan Road, Suzhou New District Jiangsu, China

declares that the below mentioned product

GFG-3015

is 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) and Low Voltage Equipment Directive (73/23/EEC & 93/68/EEC). For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Equipment Directive, the following standards were applied:

◎

EMC

EN 61326-1 :

EN 61326-2-1:

Conducted and Radiated Emissions

CISPR11: 2003+A1: 2004+A2: 2006

Current Harmonic

EN 61000-3-2: 2006

Voltage Fluctuation

EN 61000-3-3: 1995+A1: 2001+A2 : 2005

-------------------------

◎◎◎◎ Safety

Low Voltage Equipment Directive 73/23/EEC & amended by 93/68/EEC

Safety Requirements

IEC/EN 61010-1: 2001

Electrical equipment for measurement, control and laboratory use––EMC

requirements

Electrostatic Discharge

IEC 61000-4-2: 2001

Radiated Immunity

IEC 61000-4-3: 2006+A1: 2007

Electrical Fast Transients

IEC 61000-4-4: 2004+Corr.1 : 2006+Corr.2 : 2007

Surge Immunity

IEC 61000-4-5: 2005

Conducted Susceptibility

IEC 61000-4-6: 2003+A1: 2004+A2: 2006

Power Frequency Magnetic Field

IEC 61000-4-8: 2001

Voltage Dips/ Interrupts

IEC 61000-4-11: 2004

GFG-3015 p.1

1. Precautions

This statement identifies conditions or practices that could

This term indicates that an injury hazard may occur, but is

rm indicates potential damage to this product or other

GFG-3015 is specially designed for safety operation. It has passed through

rigorous tests of inclement environment to ensure its reliability and good condition.

The following precautions are recommended to insure your safety and keep the

best condition of the equipment.

(1) Safety Terms and Symbols

The following terms and symbols may appear in this manual:

WARNING

CAUTION

result in injury or loss of life.

result in damage to this product or other properties.

The following terms and symbols may appear on the product:

DANGER This term indicates an immediately accessible injury hazard. WARNING

not immediately accessible.

CAUTION This te

properties.

DANGER

High voltage

Protective

Conductor

Terminal

refer to manual

ATTENTION

Double

Insulated

DANGER

Hot surface

Earth

Ground

Terminal

(2) Do not place any heavy objects on the instrument under any circumstances.

(3) Disassembling the instrument

Due to the precision of this instrument, all the procedures of disassembling, adjusting, and maintenance should be performed by a professional technician. If the instrument has to be opened or adjusted under some unavoidable conditions, and to be managed by a technician who is familiar with GFG-3015. Once there is any abnormality, please contact our company or our distributor near you.

(4) Power Supply

AC input should be within the range of line voltage±15%, 50/60Hz. To prevent the instrument from burning up, be sure to check the line voltage before turning on power.

p. 2 GFG-3015

(5) Grounding

To avoid electrical shock, the power cord protective grounding

For continued fire protection, replace fuse only with the

d personnel. Disconnect the

Figure (A)

Figure (B)

WARNING

conductor must be connected to ground.

GFG-3015 can be operated only with an earth grounded AC power cord that connects the case and ground well. This is to protect the user and the instrument from the risk of shock hazard.

(6) Fuse Replacement

WARNING

specific type and rating by qualifie power cord before replacing fuse.

The fuse blows only when there is any wrong on the instrument, which will stop working under this situation. Please find out the cause, then open the outside case (Please see the Figure (A), Figure (B) on below) and replace a proper fuse as listed below. Be sure to use the correct fuse before changing the applying location.

F101 : T 0.8A/250V F100 : T 0.5A/250V

Check the line voltage setting on the rear panel. If the line voltage setting does not match, Please change the line voltage setting according to the following steps:

1. Remove line cord from AC socket.

2. Switch the “AC line voltage switch” to correct setting with flat-blade screwdriver and reinsert.

(7) Cleaning the Cabinet

Disconnect the AC power cord before cleaning the instrument.

Use a soft cloth dampened in a solution of mild detergent and water. Do not spray cleaner directly onto the instrument, since it may leak into the cabinet and cause damage.

Do not use chemicals containing benzing, benzne, toluene, xylene, acetone, or similar solvents.

GFG-3015 p.3

(8) Operation environment

For measurements performed on circuits directly

For measurements performed on circuits not directly

Green/Yellow

Indoor use Altitude up to 2000m Temperature to satisfy the specification : 18oC ~ 28oC (+64.4oF ~ +82.4oF) Operating temperature : 0oC ~ 40oC (+32oF ~ +104oF) Storage temperature : -10oC ~ 70oC (+14oF ~ 158oF) Relative humidity : up to 90% when 0oC~35oC;

up to 70% when 35oC~40oC

Installation category： CAT Ⅱ(The detail is as Table A) Pollution degree： 2

Table A

CAT Ⅳ

For measurements performed at the source of the low-voltage installation.

CAT Ⅲ

For measurements performed in the building installation.

CAT Ⅱ

connected to the low-voltage installation.

CAT Ⅰ

connected to Mains.

(9) Place GFG-3015 in a location with a suitable environment as stated above free

from dust, direct exposition of sunlight, and strong effect of magnetic fields.

(10) For United Kingdom

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 codes:

Blue Brown

:Earth :Neutral :Live

(Phase)

As the colours of the wires in mains leads may not correspond with the

coloured markings identified in your plug/appliance, proceed as follows:

The wire which is coloured Green and Yellow must be connected to the Earth terminal marked with the letter E or by the earth symbol or

coloured Green or Green and 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 and fuse carrier and disposed of

immediately, as a plug with bared wires is hazardous if engaged in a live

socket. Any re-wiring must be carried out in accordance with the

information detailed in this section.

p. 4 GFG-3015

2. Product Introduction

The frequency feedback method applied by GFG-3015 is a new technique that generates stable output frequency with extraordinary accuracy for Function Generator.

The traditional function generators typically use integrating circuit and constant current circuit techniques that are easily affected by operation temperature or the quality of resistor or capacitor and other key components to occur poor frequency accuracy. The innovative design for GFG-3015 is to get rid of these problems.

The frequency feedback system needs a compatible, powerful frequency counter. GW has designed his own full-function counter chip, GFC-9701, for this system with high frequency test range and full functions, including Period test, Duty test, Ratio test, Time interval, Pulse wide, direct display and direct connect with CPU system.

GFG-3015 uses this Chip to read output frequency value at any time. Then CPU will modify the correct value of D/A converter immediately according to this value, so that the user can get a high accuracy frequency from GFG-3015 Function Generator.

Besides, the GFG-3015 can also generate a high accuracy frequency to provide high frequency resolution.

Graph1 indicates the fundamental construction of a frequency feedback system.

D/A

Convertor

User

Interface

Except the different design from the typical circuit, GFG-3015 system also has micro controller (CPU unit) equipping an additional RS-232 interface functions which will be used on any test system with other instrument or to be controlled by computer.

CPU

(GFC-9701)

VCO

Counter

AMP O/P

GFG-3015 p.5

3. Features

GFG-3015 is a functional Function generator that applies Frequency feedback control system technique and can generate high frequency accuracy with high resolution. Its main signal source can generate waveforms including sine wave, square wave, triangle wave, and ramp wave.

There are additional features listed as follows:

 All digitized operation user interface

 Output Waveforms of Sine, Square, Triangle, Ramp, Pulse, AM, FM, Sweep,

Trigger and Gate or Burst.

 Wide output frequency range 0.01Hz ~ 15MHz.

 High frequency accuracy 0.02% ± 5 count.

 Maximum frequency resolution 10mHz.

 Dual displays indicate frequency and amplitude or other necessary information.

 Built-in 6-digit INT/EXT Function Counter and up to 150MHz frequency range with

high resolution.

 INT/EXT AM/FM Modulation with internal modulation signal output.

 LIN/LOG Sweep Mode with internal sweep signal output.

 VCF of 100:1 EXT Frequency Control.

 SYNC Output.

 TTL Output.

 Synchronization GCV Output.

 Variable DC Offset Control

 Output Overload Protection

 RS232 Interface Standard

p. 6 GFG-3015

4. Specifications

Ramp, Pulse, AM, FM, Sweep,

amplitude

Output Waveforms

Frequency Range 10mHz~15MHz in 8 Frequency Range (auto switch)

Frequency

Resolution

Frequency

Accuracy

Output Impedance

Amplitude

Sine, Square, Triangle, ± Trigger, Gate or Burst

1.5001MHz ~ 15.0000MHz …(100Hz)

150.01kHz ~ 1.50000MHz…(10Hz)

15.001kHz ~ 150.000kHz…(1Hz)

1.5001kHz ~ 15.0000kHz…(0.1Hz);

150.01Hz ~ 1.50000kHz…(10mHz)

15.01Hz ~ 150.00Hz…(10mHz)

1.51Hz ~ 15.00Hz…(10mHz)

0.01Hz ~ 1.50Hz…(10mHz)

0.02% ±5 Count

50Ω ± 10%

10.00V~0.01V (into 50Ω) 4

Range

Resolution 10mV(10.00V~0.01V)

ranges

| Vac peak | + | Vdc | < 5V

DC Offset

Duty

Sync Output

Sine

Square

Accuracy

Unit Vpp, Vrms, dBm

Range

Resolution 10mV

Accuracy

Control Range

Resolution

Accuracy

Impedance 50 Ω ±10%

Level >1Vp-p open circuit

Distortion

Asymmetry

≤3% ±5count at 10Hz~1MHz

≤10% ±5count at 1MHz~15MHz

± 5V (into 50Ω)

| Vac peak | + | Vdc | < 5V

≤3% ±3count at Amplitude Min.

80%:20%:80% to 1MHz

≤1% to 1MHz at 50% Duty

≤0.5%(-46dBc) From 10Hz~100kHz ≤-30dBc To 15MHz

(Spec. applied form 1Vpp to 10Vpp)

±1% of period + 3ns

Triangle and Ramp

Rise or Fall Time <18nSec

Linearity Error <1% of full scale output at 100Hz

GFG-3015 p.7

Sweep

AM, FM, Sweep, Trigger(int/ext), Gate or

amp or

10mHz~10KHz in 3 Frequency Range

Sweep Mode Linear or Log sweep

150kHz~15MHz 15kHz~1.5MHz

1.5kHz~150kHz

Sweep Range

150Hz~15kHz 15Hz~1.5kHz

1.5Hz~150Hz

0.15Hz~15Hz

0.01Hz~1.5Hz

Width >100:1(In Same Frequency Range)

Rate 0.01Hz~10kHz

Symmetry Control 90:10:90 ; Resolution:1%

Sweep output 0 to≥-5Vp-p into 10k Ω

Modulation

Types

Waveform

Burst (Implement by Trigger Type) Sine, Square, Triangle, R Variable Symmetry Pulse

Rate Frequency

Range

Rate Frequency

Accuracy

Rate Frequency

Resolution

(auto switch)

5%±1 count

10.0kHz~0.1kHz(100Hz) 99Hz~1Hz(1Hz)

0.99Hz~0.01Hz(0.01Hz)

Symmetry 90%:10%:90%; Resolution:1%

Symmetry Accuracy

Output Level

±1 count(≤1%)

≧1Vpp into 10kΩ load

Sine Wave Distortion ≤2% from 10Hz to 10kHz

Amplitude Modulation

Depth 0~100%

Modulation

Frequency Rate

Carries -3dB

Bandwidth

0.01Hz ~ 10kHz(INT) DC~1MHz(EXT)

<100Hz to >5MHz

External Sensitivity ≤10Vpp for 100% modulation

Frequency Modulation

Frequency Rate

External Sensitivity ≤5Vpp for 15% deviation

p. 8 GFG-3015

Deviation 0~±15%

Modulation

0.01Hz ~ 10kHz(INT) DC ~ 50kHz(EXT)

Start/Stop Phase

In Same Frequency

to 2V as per different

± 20ppm(23ºC ± 5ºC) after 30 minutes

nHz for

Range

Rate 0.01Hz~10kHz

-90º ~ +80º

Trigger

VCF

TTL Output

GCV Output

Frequency Counter

Interface RS232

Frequency Range 0.1Hz ~ 1MHz(Useful to 10MHz)

Ext Trig Frequency

Range

Gate or Burst

Range

DC to 1MHz,TTL compatible input level

Implement by Trigger setting. 100:1(0 to 10V± 1V)

Range

Input Linearity <0.5% to 1MHz,<5% to 10MHz

Input Impedance 10 k Ω

Level

≧3Vpp

Fan-out >10 TTL Load

To set the voltage between 0.2V Frequency in Same frequency Range

INT/EXT Switch Selector

Range 5Hz~150MHz EXT

Accuracy Time Base(10MHz) Accuracy ± 1 count

Time Base

Resolution

warm up The maximum resolution is 100 1Hz and 1Hz for 100MHz

Input Impedance 1MΩ // 150pF

Sensitivity

≤35mVrms(5Hz~100MHz); ≤45mVrms(100MHz~150MHz)

Accessories

Power Source

Dimensions

GTL-101 × 2, Instruction Manual × 1, Power cord × 1

115/ 230V AC ±15%, 50/60Hz

290 (W) × 142 (H) × 346 (D) mm

Weight Approx. 5kg

GFG-3015 p.9

5. Front and Rear Panels

Front Panel

p. 10 GFG-3015

RATE

SPAN

FUNC

FREQ

AMPL

OFFSET

UTY

MOD/ON

POWER button

Push the button to turn on the power, and the display activated. Push again the button to turn off the power.

Main Function keys

Key is to set main output waveform in the cycle of Sine, Triangle and Square. When the key is pressed, the related waveform LEDs will light up accordingly.

Key is to set main frequency entry mode. Key in the desired value of frequency by using the number keys or Modify keys and Unit keys. When the key is pressed, the FREQ LED (on parameter display area A) will be flashing until other mode is set.

Key is to set main amplitude entry mode. Key in the desired value of voltage by using the number keys or Modify keys and Unit keys. When the key is pressed, the AMPL LED (on parameter display area B) will be flashing until other mode is set.

Key is to set main output offset voltage entry mode. Key in the desired value of voltage by using the number keys or Modify keys and Unit keys. When the key is pressed, the OFFS LED (on parameter display area B) will be flashing until other mode is set.

Key is to set main output Duty Cycle entry mode. Key in the desired value of percentage by using the number keys or Modify keys and Unit keys. When the key is pressed, the DUTY LED (on parameter display area B) will be flashing until other mode is set.

Modulation/Sweep Function keys

Key is to start performing Amplitude Modulation, Frequency Modulation or Sweep function. When the key is pressed again, the functions will stop. When the key is pressed, the ON/OFF LED (on MOD/SWP Function LED area) will light up, press again the key, the LED will be off.

These keys control the functions of sweep and modulation.

SOURCE

Key is to set Span of Modulation or Sweep entry mode and choose the source of modulation. If set to source choose function, must use Secondary Function mode.

Key is to choose the type of modulation between AM and FM. If want to set to FM function, must use Secondary Function mode.

INT/EXT

Key is to set Rate of Modulation, Sweep or Trigger entry mode and choose the signal source of Modulation, Sweep or Trigger. If want to set to signal, must use Secondary Functions mode.

GFG-3015 p.11

DEG/%

START

LIN S

STOR

RS232

KHz/Vrm

s Hz/Vpp

SYM

RS232

lease refer to the

the setup parameters of the

the selected

Key is to start performing RS232 interface. Press the

s (ON or

knob to change the

Baud rate. The cycle order is in 300, 600, 1200, 2400, 4800,

, must use Secondary

Secondary Functions mode. When

the key is pressed, the instrument will choose Secondary

can recall the default

In ‘Normal’ mode, these

keys are used to assign the unit and to set the entered value.

Vpp to set the output

amplitude. They can be used to set frequency (MHz, kHz,

MHz/dB

SHIFT

System keys

STOP

Key is to set Start Frequency of Sweep entry mode and Stop Frequency of Sweep entry mode. If set to Stop Frequency of Sweep entry mode, must use Secondary Functions mode.

LOG S

Key is to choose the type of Sweep between liner sweep and LOG sweep. If set to LOG sweep, must use Secondary Function mode.

SWP CF

Key is to set the Duty cycle of Modulation, Sweep or Trigger source entry mode. Key in the desired value of percentage by using number keys or modify keys and Unit keys. If want to set to center frequency of Sweep function that must use Secondary Functions mode. When the key is pressed, the SYM LED (on parameter display area B) will be flashing until other mode is set. When you use center frequency entry mode then the CF LED (In parameter display area A) will be flashing until other mode is set. The detail operation of these keys. P instruction in next Chapter.

RECL

Key is to save or reload instrument into or take out from memory; numbers is from 0 to 9, up to 10 groups.

DEFAU

Unit keys

key then use rotational knob to change function state OFF).

Press the key again then use rotational

9600 and 19200 sequence. If set the instrument to default state Function mode.

Key is to set the

Function and the SHIFT LED will light up.

DEFAU

For example, press + value of the instrument.

For example, you can use dBm and

Hz), OFFSET, and PHASE, etc. In STOR or RECL modes, they are used as ‘Enter’.

p. 12 GFG-3015

GATE

TRIG ON

SIGL/MUT

PHASE

TRI

G EXT

►

9 . 0

/BK SP

◄

HOLD

keys are used to input

used to delete the entered

are used to change the digit of input

the function of all Modify keys until

until the

arameter

, internal

LED (In Trigger Function

area) will light up accordingly until the key is pressed

source of counter,

display presents the parameter values

was

Entry keys

To and value. A unit key should be pressed to set the entered value.

key is blank space that value entirely and the other function is minus key .

Modify keys

Trigger Function keys

Keys value. User can use the Rotate knob for increasing or decreasing that digit.

Key to terminate user press this key again. When the key is pressed, the HOLD LED will light up key is pressed again.

Key is to start performing Trigger function mode. If the key is pressed again, the function will stop. When the key is pressed, the ON/OFF LED (In Trigger Function LED area) will light up until the key is pressed again (The LED will light off).

Key is to choose the type of Trigger, Single-trigger or multi-trigger. When the key is pressed, the MULT or SINGL LED (In Trigger Function LED area) will light up accordingly.

Key is to set the phase of trigger function entry mode. Key in the desired value of percentage by using number keys, modify keys and Unit keys. When the key is pressed, the PHASE LED (In p display area B) will be flashing until other mode is set.

Counter Function key

Parameter display Area (A)

Key is to choose the Trigger signal source or external. When the key is pressed, the EXT LED again (The LED will light off).

INT/EXT

Key is to set the Gate time of External counter function. The cycle order is according to 0.01s, 0.1s, 1s, and 10s. When the key is pressed, the Gate time LEDs will light up according user’s wish. The other function is to choose input signal internal or external, by using Secondary Function mode.

The 6-digit Parameter and information about the current status and unit. The START LED light on indicated that the value of display was Start frequency of sweep function right now. The STOP LED light on indicated that the value of display was Stop frequency of sweep function right now. The CF LED light on indicated that the value of display center frequency of sweep function right now.

GFG-3015 p.13

+ 38 hidden pages