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Function Generator
Model : GFG-3015
Operation Manual
82FG-30150MB
i
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. Adjustment and Correction ............................................................................................. 48 7.1 Preparation.............................................................................................................. 48 7.2 Adjust and Check up the operation DC Voltage.................................................. 48 7.3 Adjusting Main Clock ............................................................................................. 49 7.4 Adjusting Sensitivity of counter ........................................................................... 49 7.5 Adjusting VCF Function 100:1 .............................................................................. 49 7.6 Adjusting Main Frequency , Duty Cycle and GCV Output Check ...................... 49 7.7 Adjusting Rise/Fall Time........................................................................................ 50 7.8 Adjusting Main Sine wave Harmonic Distortion.................................................. 50 7.9 Adjusting Modulation source ................................................................................ 50 7.9.1 Adjusting Rate and symmetry............................................................................ 50 7.9.2 Adjusting Sine wave Harmonic Distortion ........................................................ 51 7.10 Adjusting AM modulation .................................................................................... 51 7.11 Adjusting FM and Sweep Function..................................................................... 53 7.12 Adjusting Trigger Phase ...................................................................................... 55 7.13 Calibrating by Software ....................................................................................... 56 8. The Block Diagram and Description of the System ...................................................... 62
ii
EC Declaration of Conformity
We
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 (89/336/EEC, 92/31/EEC, 93/68/EEC) 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: Electrical equipment for measurement, control and laboratory use EMC
requirements (1997+A1: 1998+A2: 2001) Conducted and Radiated Emissions Electrostatic Discharge EN 55011: 1998 class A EN 61000-4-2: 1995+A1:1998 Current Harmonic Radiated Immunity EN 61000-3-2: 2000 EN 61000-4-3: 1996+A1:1998 Voltage Fluctuation Electrical Fast Transients EN 61000-3-3: 1995 EN 61000-4-4: 1995 Surge Immunity ------------------------EN 61000-4-5: 1995 Conducted Susceptibility ------------------------EN 61000-4-6: 1996 Power Frequency Magnetic Field ------------------------EN 61000-4-8 : 1993 Voltage Dips/ Interrupts ------------------------EN 61000-4-11: 1994
Safety
Low Voltage Equipment Directive 73/23/EEC & amended by 93/68/EEC
Safety Requirements IEC/EN 61010-1: 2001
GFG-3015
p.1
1. Precautions
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:
! !
This statement identifies conditions or practices that could result in injury or loss of life. This statement identifies conditions or practices that could CAUTION result in damage to this product or other properties. WARNING
The following terms and symbols may appear on the product: This term indicates an immediately accessible injury hazard. DANGER This term indicates that an injury hazard may occur, but is WARNING not immediately accessible. This term indicates potential damage to this product or other CAUTION properties.
!
DANGER High voltage Protective Conductor Terminal ATTENTION refer to manual 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
!
WARNING
To avoid electrical shock, the power cord protective grounding 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
For continued fire protection, replace fuse only with the specific type and rating by qualified personnel. Disconnect the 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.
Figure (A) (7) Cleaning the Cabinet Disconnect the AC power cord before cleaning the instrument.
Figure (B)
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 Indoor use Altitude up to 2000m Temperature to satisfy the specification : Operating temperature : Storage temperature : Relative humidity : Installation category Pollution degree
18oC ~ 28oC (+64.4oF ~ +82.4oF) 0oC ~ 40oC (+32oF ~ +104oF) -10oC ~ 70oC (+14oF ~ 158oF) up to 90% when 0oC~35oC; up to 70% when 35oC~40oC CAT (The detail is as Table A) 2
CAT CAT CAT CAT
Table A For measurements performed at the source of the lowvoltage installation. For measurements performed in the building installation. For measurements performed on circuits directly connected to the low-voltage installation. For measurements performed on circuits not directly 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
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
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: Green/Yellow :Earth Blue :Neutral :Live Brown
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.
(Phase)
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
VCO
AMP
O/P
User Interface
CPU
Counter (GFC-9701)
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.
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
Output Waveforms Sine, Square, Triangle, ± Ramp, Pulse, AM, FM, Sweep, 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
Frequency Range 10mHz~15MHz in 8 Frequency Range (auto switch)
Frequency Resolution
Frequency Accuracy
Output Impedance 50 ± 10% Range Amplitude Resolution Accuracy Unit Range DC Offset Resolution Accuracy Control Range Duty Resolution Accuracy Sync Output Sine Impedance Level Distortion 10.00V~0.01V (into 50) 4 amplitude ranges | Vac peak | + | Vdc | < 5V 10mV(10.00V~0.01V) 3% ±5count at 10Hz~1MHz 10% ±5count at 1MHz~15MHz Vpp, Vrms, dBm ± 5V (into 50) | Vac peak | + | Vdc | < 5V 10mV 3% ±3count at Amplitude Min. 80%:20%:80% to 1MHz 1% 1% to 1MHz at 50% Duty 50 ±10% >1Vp-p open circuit 0.5%(-46dBc) From 10Hz~100kHz -30dBc To 15MHz (Spec. applied form 1Vpp to 10Vpp) ±1% of period + 3ns <18nSec <1% of full scale output at 100Hz
Square Triangle and Ramp
Asymmetry Rise or Fall Time Linearity Error
GFG-3015
p.7
Sweep Mode
Sweep Range Sweep Width Rate Sweep output Types Waveform Rate Frequency Range Rate Frequency Accuracy Rate Frequency Resolution
Linear or Log sweep 150kHz~15MHz 15kHz~1.5MHz 1.5kHz~150kHz 150Hz~15kHz 15Hz~1.5kHz 1.5Hz~150Hz 0.15Hz~15Hz 0.01Hz~1.5Hz >100:1(In Same Frequency Range) 0.01Hz~10kHz 0 to-5Vp-p into 10k AM, FM, Sweep, Trigger(int/ext), Gate or Burst (Implement by Trigger Type) Sine, Square, Triangle, Ramp or Variable Symmetry Pulse 10mHz~10KHz in 3 Frequency Range (auto switch) 5%±1 count
Symmetry Control 90:10:90 ; Resolution:1%
10.0kHz~0.1kHz(100Hz) 99Hz~1Hz(1Hz) 0.99Hz~0.01Hz(0.01Hz) Symmetry 90%:10%:90%; Resolution:1% Symmetry Accuracy ±1 count(1%) Output Level Modulation Sine Wave Distortion Amplitude Modulation Depth Modulation Frequency Rate Carries -3dB Bandwidth External Sensitivity 1Vpp into 10k load 2% from 10Hz to 10kHz
0~100% 0.01Hz ~ 10kHz(INT) DC~1MHz(EXT) <100Hz to >5MHz 10Vpp for 100% modulation
Frequency Modulation Deviation 0~±15% Modulation 0.01Hz ~ 10kHz(INT) DC ~ 50kHz(EXT) Frequency Rate External Sensitivity 5Vpp for 15% deviation
p. 8
GFG-3015
Start/Stop Phase Range Rate Trigger
-90º ~ +80º 0.01Hz~10kHz
VCF
Frequency Range 0.1Hz ~ 1MHz(Useful to 10MHz) Ext Trig Frequency DC to 1MHz,TTL compatible input level Range Gate or Burst Implement by Trigger setting. 100:1(0 to 10V± 1V) In Same Frequency Range Range Input Linearity <0.5% to 1MHz,<5% to 10MHz Input Impedance 10 k 3Vpp Level
TTL Output GCV Output
Fan-out >10 TTL Load To set the voltage between 0.2V to 2V as per different Frequency in Same frequency Range INT/EXT Switch Selector Range Accuracy Time Base Resolution Input Impedance Sensitivity 5Hz~150MHz EXT Time Base(10MHz) Accuracy ± 1 count ± 20ppm(23ºC ± 5ºC) after 30 minutes warm up The maximum resolution is 100nHz for 1Hz and 1Hz for 100MHz 1M // 150pF 35mVrms(5Hz~100MHz); 45mVrms(100MHz~150MHz)
Frequency Counter
Interface Accessories Power Source Dimensions Weight
RS232 GTL-101 × 2, Instruction Manual × 1, Power cord × 1 115/ 230V AC ±15%, Approx. 5kg 50/60Hz 290 (W) × 142 (H) × 346 (D) mm
GFG-3015
p.9
5. Front and Rear Panels
Front Panel
p. 10
GFG-3015
1
POWER button Main Function keys
: :
Push the button to turn on the power, and the display is activated. Push again the button to turn off the power. 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.
FUNC
2
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.
FREQ
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.
AMPL
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.
OFFSET
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.
DUTY
3
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.
MOD/ON 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.
SPAN FM
Key is to choose the type of modulation between AM and FM. If want to set to FM function, must use Secondary Function mode.
AM INT/EXT RATE
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
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.
START 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.
LIN S SWP CF SYM
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. Please refer to the instruction in next Chapter.
RECL
4
System keys
:
Key is to save or reload the setup parameters of the instrument into or take out from memory; the selected DEFAU numbers is from 0 to 9, up to 10 groups.
STOR
Key is to start performing RS232 interface. Press the key then use rotational knob to change function states (ON or OFF). Press the key again then use rotational knob to change the Baud rate. The cycle order is in 300, 600, 1200, 2400, 4800, 9600 and 19200 sequence. If set the instrument to default state, must use Secondary Function mode. Key is to set the Secondary Functions mode. When the key is pressed, the instrument will choose Secondary Function and the SHIFT LED will light up.
SHIFT
DEFAU RS232 RS232
For example, press SHIFT value of the instrument.
5
+
Hz/Vpp
can recall the default
Unit keys
:
In `Normal' mode, these keys are used to assign the unit and to set the entered value. For example, you can use dBm and Vpp to set the output amplitude. They can be used to set frequency (MHz, kHz, Hz), OFFSET, and PHASE, etc. In STOR or RECL modes, they are used as `Enter'.
DEG/% MHz/dB
KHz/Vrms
p. 12
GFG-3015
6
Entry keys
:
9 . To and keys are used to input value. A unit key should be pressed to set the entered value. 0
key is blank space that used to delete the entered value entirely and the other function is minus key .
-/BK SP
7
Modify keys
:
Keys are used to change the digit of input value. User can use the Rotate knob for increasing or decreasing that digit.
Key to terminate the function of all Modify keys until user press this key again. When the key is pressed, the HOLD LED will light up until the key is pressed again.
HOLD
8
Trigger Function keys
:
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).
TRIG ON
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.
SIGL/MUT
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 parameter display area B) will be flashing until other mode is set.
PHASE
TRIG EXT
Key is to choose the Trigger signal source, internal or
external. When the key is pressed, the EXT LED (In Trigger Function LED area) will light up accordingly until the key is pressed again (The LED will light off).
INT/EXT
9
Counter Function key
:
10
Parameter display Area (A)
:
Key is to set the Gate time of External counter GATE 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 source of counter, internal or external, by using Secondary Function mode. The 6-digit Parameter display presents the parameter values 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 was center frequency of sweep function right now.
GFG-3015
p.13
11
Parameter display Area (B)
:
12
13
14
Waveform Function LEDs Counter Functions LEDs Modulation/Sweep Function LEDs
: : :
The FREQ LED light on indicated that the value of display was main output frequency right now. The RATE LED light on indicated that the value of display was rate frequency of sweep or modulation or trigger function right now. The SPAN LED light on indicated that the value of display was Span frequency of sweep function right now. The MHz, kHz, Hz and mHz LED light on indicated that unit according current value of display. This 4-digit Parameter display presents the parameter values and information about the current status and unit. The AMPL LED light on indicated that the value of display was main output amplitude right now. The OFFS LED light on indicated that the value of display was main output DC offset voltage right now. The DUTY LED light on indicated that the value of display was main output duty cycle right now. The SPAN LED light on indicated that the value of display was span frequency of modulation function right now. The SYM LED light on indicated that the value of display was modulation signal duty cycle of sweep or modulation or trigger function right now. The PHASE LED light on indicated that the value of display was phase of trigger function right now. The STOR LED light on indicated that the value of display was save group number right now. The RECL LED light on indicated that the value of display was reload group number right now. The V, rms, dBm kHz, Hz, % and DEG LED light on indicated that unit according current value of display. These LEDs indicate the figure of main output waveform and the current operation functions. These LEDs indicate the GATE TIME of external counter and the current value. These LEDs indicate the current status of Sweep and Modulation and the current operation functions. The AM LED lights on to indicate the setting status of amplitude modulation function. The FM LED lights on to indicate the setting status of frequency modulation function. The LIN LED lights on to indicate the setting status of liner sweep function. The LOG LED lights on to indicate the setting status of LOG sweep function. The Sine, Triangle and Square LED light on indicated that according Modulation source waveform. The EXT LED lights on to indicate the external sweep or modulation signal source. The ON/OFF LED lights on to indicate that the sweep or modulation function is enabled.
p. 14
GFG-3015
15
Trigger Function LEDs :
16
Shift mode LED Hold mode LED
: :
17
18
RS-232 Interface LED : Main Output BNC Sync Output BNC TTL Output BNC GCV Output BNC Modulation/Sweep Output BNC
19
: : : : :
20
21 22
These LEDs indicate the current status of trigger function on display and the current operation functions. The MULT LED lights on to indicate the trigger setting status of multi-trigger type. The SINGL LED lights on to indicate the trigger setting status of Single-trigger type. The EXT LED lights on to indicate the external trigger signal source. The ON/OFF LED lights on to indicate that the trigger function is enabled. The SHIFT LED light on indicated that the enter mode is Secondary Functions right now. The HOLD LED lights on to indicate that all modify keys is disabled. The RS232 LED indicates the current operation status with the RS-232 interface bus. This is the BNC connector that outputs all main signals. Output resistance is 50. This is the BNC connector that outputs sync signals. Output resistance is 50. This is the BNC connector that outputs TTL level signals. This is the BNC connector that outputs the voltage between
0.2V and 2V varied with different Frequency
23
24
EXT Modulation/Trigger : Input BNC
25
VCF Input BNC
:
26
EXT Counter Input BNC :
This is the BNC connector that outputs internal Sweep or modulation signals. Output Impedance is 10k. This is the BNC connector for EXT amplitude/frequency modulation or EXT sweep signal input. The amplitude modulation index is 100% when 10Vpp is input. The frequency modulation index is 15% when 5Vpp is input. The trigger mode input signal is compatible with TTL level. This is the BNC connector for VCF signal input. The frequency variation width index is 100:1 when 10V± 1V is input. Input Impedance is 10k. This is the BNC connector for external counter signal input. The Input Impedance is 1M // 150pF
GFG-3015
p.15
Rear Panel
p. 16
GFG-3015
1
Power Entry model Line Voltage Selector RS232 connector
: This is the AC power input terminal. AC input should be within
the range of line voltage±15%, 50/60Hz. : This switch can choose the current line voltage between 115V and 230V : This is the port of serial RS232 interface. The DCE and Baud rate is among 300 ~ 19.2k.
2
3
GFG-3015
p.17
6. Operation
6.1 The First Step Setup For Instrument
Ensure that the voltage of main supply is compatible with this instrument. The selector on the rear panel states the required AC line voltage. Connect the instrument to main supply with the power cord. Press the Power Switch, all control functions will be shown on the parameter display area. DEFAU
Press
SHIFT
+
RS232
can recall the default value of this instrument.
6.2 The Setup of Output Function
Press FUNC key to select main output waveform. The Waveform will change when you press this key each time. The cycle order is according to Sine, Triangle, Square. When the key is pressed, the waveform LEDs will light up according to the mentioned cycle order of output waveform. Set different duty cycle ratio (not 50%) for Triangle or Square waveform to get ±Ramp or different Pulse width square waveform.
6.3 The Setup of Frequency
Set to Frequency Entry mode by pressing
parameter display area A) will be flashing.
FREQ
button, the FREQ LED (In
Key in the desired value of frequency. Select a proper unit-button to specify the value.
In addition, you can use main frequency value you need.
and the Rotate Knob to adjust the
Note: The frequency range of this instrument is from 10mHz to 15MHz in 8 Frequency Range. The details and resolution is as below. But those ranges will auto switch according to the enter value.
Frequency Range
Frequency Resolution
10mHz~15MHz in 8 Frequency Range (auto switch) 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)
Example of the Setup Frequency 1. To set frequency at 250Hz Press
p. 18 GFG-3015
FREQ
first, then key in
2
5
0
and press
Hz/Vpp
.
2. To modify the frequency to 850Hz.
Press or to move flash digit to " 2 " position. Then turn the Rotate Knob clockwise until the digit become to " 8 ".
6.4 The Setup of Amplitude
Set to Main Amplitude entry mode by pressing
LED (In parameter display area B) will be flashing.
AMPL
button to, now the AMPL
Key in the desired value of Amplitude. Select a proper unit-button to specify the value.
In addition, you can use or main Amplitude value you need.
and the Rotate Knob to modify the
Example of the Setup Amplitude 1. To set Amplitude at 8 Vpp.
8 Press AMPL first, then key in 2. To modify the Amplitude to 5 Vpp.
and press
Hz/Vpp
.
Press or to move flash digit to " 8 " position. Then turn the Rotate Knob anti-clockwise until the digit become to " 5 ".
The input limit : (1) Amplitude should be among 0.01 ~ 10Vpp. (2) Offset should be among ±5Vpp. (3) AMPL + |2 × OFFSET| 10Vpp.
6.5 The Setup of Offset
Set to main DC offset Voltage entry mode by pressing
OFFS LED (In parameter display area B) will be flashing.
OFFSET
button, now the
Key in the desired value of DC offset voltage. Select a proper unit-button to specify the value.
In addition, you can use main DC offset voltage value you need.
and the Rotate Knob to modify the
Example of the Setup Offset 1. To set DC offset voltage at 1 Vpp.
1 Press OFFSET first, then key in 2. To modify offset voltage to 2 Vpp.
and press
Hz/Vpp
.
Press or to move flash digit to " 1 " position. Then turn the Rotate Knob clockwise until the digit become to " 2 ".
The input limit : (1) Amplitude should be among 0.01 ~ 10Vpp. (2) Offset should be among ±5Vpp. (3) AMPL + |2 × OFFSET| 10Vpp.
GFG-3015
p.19
6.6 The Setup of Duty
Set Duty cycle of Main output entry mode by pressing DUTY LED (In parameter display area B) will be flashing. Key in the desired value of Duty cycle. Key in the specific value by using Unit button.
DUTY
button, the
In addition, you can use and the Rotate Knob to modify the Duty cycle of Main output value you need.
Example of the Setup Duty 1. To set Duty cycle at 60%. Press DUTY first, then key in 2. To modify Duty cycle to 30%.
6 0
and press
DEG/%
.
Press or to move flash digit to " 6 " position. Then turn the Rotate Knob anti-clockwise until the digit become to " 3 ". The input limit: 80%:20%:80% at 1MHz.
6.7 The Setting of STORE
The Store button is used to save the setup parameters of the instrument into its memory with the stored group number from 0 to 9, up to 10 groups totally.
RECL
Push STOR button. Key in the group number from 0 to 9. Press any button from setting.
DEG/% MHz/dB kHz/Vms
or
Hz/Vpp
to complete the
Example of the Setup STOR To save a parameter to the RAM of group #5.
RECL
Press
STOR
first, then key in
5
and press
Hz/Vpp
.
6.8 The Setting of RECALL
The Recall button can retrieve the parameters saved in the RAM.
RECL
Push SHIFT and STOR button. Key in the group number from 0 to 9. Press any button from setting.
DEG/% MHz/dB kHz/Vms
or
Hz/Vpp
to complete the
Example of the Setup RECALL To retrieve a parameters from the RAM of group #6.
RECL
Press
SHIFT
and
STOR
first, then key in
6
and press
Hz/Vpp
p. 20
GFG-3015
6.9 The SHIFT Key and Function Keys
The
SHIFT
button is used to enable the secondary function of certain function
SHIFT
keys with blue printed letters. After pressing the
button, The SHIFT LED
will light up, only the buttons with blue printed letters are working. To release the secondary function by pressing The Secondary Functions
DEFAU SHIFT
again.
1. 2. 3. 4. 5. 6. 7. 8. 9.
SHIFT
+ + + + + + + + +
RS232 RECL
Return to the default status of GFG-3015. Retrieve the setup parameters from memory; Display sweep center frequency and get into enter mode. Change the Modulation source. Set Frequency modulation function. Choose the Modulation type. Display Sweep stop frequency and get into enter mode. Set LOG sweep function. Choose the Counter signal source.
SHIFT
STOR SWP CF
SHIFT
SYM SOURCE
SHIFT
SPAN FM
SHIFT
AM INT/EXT
SHIFT
RATE STOP
SHIFT
START LOG S
SHIFT
LIN S INT/EXT
SHIFT
GATE
6.10 Setup of LIN or LOG Sweep
GFG-3015 can adopt frequency to sweep its function output for triangle and ramp waves. The type of sweep can be set as linear or log sweep. Select a main waveform by using
FUNC
button.
AMPL
Select a main output amplitude by using
LOG S
button.
Select the sweep mode by using
INT/EXT RATE
LIN S
button.
Press
to set up sweep RATE value (Range from 0.01Hz to 10kHz).
GFG-3015
p.21
STOP
Set the starting frequency by pressing
STOP
START
button and terminate sweep
frequency by pressing
SHIFT
+
START
.
The start and stop frequency must be at the same sweep frequency range. Please refer to the Note 2 for the details. The sweep can also be done by enter Center frequency or Span frequency.
SWP CF SYM
Press Press Press Press
SHIFT SOURCE SPAN SWP CF SYM
+
for center frequency entry mode (Note 3).
for span frequency entry mode (Note 3). to set the Duty of sweep signal (Range 90%:10%:90%). to initiate sweeping.
MOD/ON
Note: 1. Please refer to the setup of LIN and LOG Sweep as the sample below. 2. Because all frequency range (0.01Hz ~ 15MHz) of GFG-3015 are composed of 8 frequency ranges (The details as below), So the value of start and stop frequency must be at the same sweep range.
Sweep Range
150kHz ~15MHz 15kHz ~1.5MHz 1.5kHz ~150kHz 150Hz ~15kHz 15Hz ~1.5kHz 1.5Hz ~150Hz 0.15Hz ~15Hz 0.01Hz ~1.5Hz
3. The bandwidth [SPAN] = stop frequency - start frequency
The center frequency = [(stop frequency + start frequency)/2] The start frequency = center frequency of the sweep - bandwidth/2 The stop frequency = center frequency of the sweep + bandwidth/2 The start and stop frequencies can be freely set according to the users' preference. 4. It won't make any change on execution and result by taking different step sequence. 5. GFG-3015 can output waveform synchronizing with its sweep function. In the example of setting up LIN sweep, the Modulation output terminal will output the waveform of triangle at 1Hz.
Example of the Setup of LIN Sweep To set the following conditions: Output function : Sine Wave. Output Amplitude : 10Vpp. Sweep mode : LIN. Speed :1 second.
p. 22
Start frequency : 1kHz. Stop frequency : 10kHz. Sweep signal symmetry: 50%.
GFG-3015
Procedure: Press Press
FUNC
to select SINE wave for main output.
1 LOG S 0 Hz/Vpp
AMPL
in sequence.
Then press
INT/EXT
LIN S
to select linear sweep mode.
1 Hz/Vpp
Press Press Press Press
RATE STOP START
in sequence. in sequence.
0
KHz/Vrms
1 STOP
KHz/Vrms
SHIFT SWP CF SYM
START
1
in sequence.
5
0
DEG/%
in sequence.
Press MOD/ON The Modulation/Sweep Output BNC will output 1Hz Triangle wave. In addition, you can use value you need.
and the Rotate Knob to modify the
Example of the Setup of LOG Sweep To set the following conditions: Output function: Triangle Wave. Output amplitude: 10Vpp. Sweep mode: LOG. Speed: 0.1 second. Procedure: Press Press
FUNC
Start frequency: 10kHz. Stop frequency: 100kHz. Sweep signal symmetry: 90%.
to select TRIANGLE wave for main output.
1 LOG S 0 Hz/Vpp
AMPL
in sequence.
Then press
INT/EXT
SHIFT
LIN S
to select LOG sweep mode.
0 Hz/Vpp
Press Press Press Press
RATE STOP START
1
in sequence. in sequence.
0
KHz/Vrms
1 STOP
0
KHz/Vrms
SHIFT SWP CF SYM
START
1
0
in sequence.
9
0
DEG/%
in sequence.
p.23
GFG-3015
Press
MOD/ON
.
The Modulation/Sweep Output BNC will output the 10Hz LOG wave. In addition, you can use value you need.
and the Rotate Knob to modify the
Error message for Sweep Function Because all frequency range (0.01Hz ~ 15MHz) of GFG-3015 are composed of 8 frequency ranges, So the Sweep function has specific restriction on the start and stop frequency. If the value of start and stop frequency not at the same sweep range, then the instrument will show the message to user. Basically, The message is a suggestion that remind user of selecting a proper sweep frequency range and amend the start or stop frequency. Please refer to the sample below: To set the following conditions: Start frequency: 100Hz. Procedure:
LOG S
Stop frequency: 1MHz.
Press Press Press Press
LIN S STOP START
to select linear sweep mode.
1 STOP 0 0 Hz/Vpp
in sequence.
SHIFT MOD/ON
START
1
MHz/dB
in sequence.
.
When the MOD/ON key is pressed, The Display area will show reminding message (The detail as below) If the input sweep ranges out of correct range, The instrument will according to start and stop frequency to suggest possible sweep range. In this sample, The message of "15Hz 1500Hz or 15kHz 1500kHz" range will be provided. Because the input start frequency is at 100Hz, so "15Hz 1.5kHz" can match up the requirement. Besides, the stop frequency is at 1MHz, so "15kHz 1.5MHz" is close to range requirement. After show the message, The Display area will back to original state (Before press the button).
p. 24
GFG-3015
6.11 Setup of AM Modulation
The AM modulation function offers internal sine, square, and triangle (ramp) signals. Besides, You can select the modulation signal from external (Modulation/Trigger Input BNC). Set the main output function by using Set the main output frequency by using Set the main output Amplitude by using Select the modulation mode by using
FUNC
button . button and number keys. button and number keys. button.
INT/EXT SHIFT
FREQ
AMPL FM AM
Select the modulation signal source by using
INT/EXT
+
RATE
.
Press
RATE
to set up modulation RATE value (Range 0.01Hz ~ 10kHz).
SOURCE SHIFT
Select the modulation signal by pressing
+
SPAN
buttons.
GFG-3015 offers sine, square, and triangle (ramp) signals for internal modulation.
SOURCE SPAN
Select the amplitude modulation depth by pressing 100%). Press Press
SWP CF SYM
buttons (Range
to set the Duty of modulation signal (Range 90%:10%:90%). to start performing amplitude modulation.
MOD/ON
Note: 1. Please refer to the setup of amplitude modulation as the example below. 2. When the modulation signal sources from external are selected, the Rate, Span (Depth), Symmetry and source selection will disable as these functions are operated on internal source mode only. 3. It won't make any change on execution and result by taking different step sequence. 4. GFG-3015 can output waveform synchronizing with its modulation function. In the example of setting up amplitude modulation, the Modulation output terminal will output the waveform of sine at 100Hz.
Example of the Setup of AM Modulation To set the following conditions: Main function: Sine Wave. Main Frequency: 10kHz. Main Output Amplitude:10Vpp Modulation Mode: Amplitude Modulation Source: INT Procedure: Press
FUNC
Modulation rate: 100Hz. Modulation Signal Source: Sine. Modulation Depth: 80%. Modulation Signal Symmetry: 50%.
to select SINE wave for main output.
GFG-3015 p.25
Press
AMPL
1
0
Hz/Vpp
in sequence.
KHz/Vrms
Then press
FM
FREQ
1
0
in sequence.
.
Press Press Press Press Press Press
AM
to set AM mode.
INT/EXT RATE
SHIFT INT/EXT RATE
to select the source from internal signal.
0 0 Hz/Vpp
1 SOURCE
in sequence.
SHIFT SOURCE SPAN SWP CF SYM
SPAN
to select the modulation signal on SINE wave.
0 DEG/%
8
in sequence. in sequence.
5
0
DEG/%
Press MOD/ON . The MOD Output BNC will output 100Hz sine wave. In addition, you can use value you need.
and the Rotate Knob to modify the
6.12 Setup of FM Modulation
The FM modulation function offers internal sine, square, and triangle (Ramp) signals. Besides, you can select the modulation signal from external (Modulation/Trigger Input BNC). Set the main output function by pressing Set the main output Amplitude by pressing Set the main output frequency by pressing Select the modulation mode by pressing
FUNC
button. button and number keys. button and number keys.
FM
AMPL
FREQ
SHIFT
+
AM
buttons.
INT/EXT
Select the modulation signal source by pressing
INT/EXT
SHIFT
+
RATE
buttons.
Press
RATE
to set up modulation RATE value (Range 0.01Hz ~ 10kHz).
SOURCE
To select the modulation signal by pressing SHIFT and SPAN buttons. GFG-3015 offers sine, square, and triangle (ramp) signals for internal modulation.
p. 26
GFG-3015
SOURCE
To select the Frequency modulation deviation by pressing (Range ±15%).
SWP CF
SPAN
buttons.
Press Press
SYM
to set the Duty of modulation signal (Range 90%:10%:90%). to start performing frequency modulation.
MOD/ON
Note: 1. As all frequency range (0.01Hz ~ 15MHz) of GFG-3015 are composed of 8 frequency ranges (The details as below), When the main frequency in FM function is set, a reasonable Span must be considered. For example, If set the main frequency at 1.4MHz (Range 7) and set Span at 10%, the corrected frequency vibration is from 1.26MHz to 1.54MHz and it will be over Range 7. Therefore, the FM result is faults now, the Span must be reduced in order to get a reasonable result. Number of Range 8 7 6 5 4 3 2 1 Main Setting Frequency FM variation Range 1.5001MHz ~ 15.0000MHz 150kHz~15MHz 150.01kHz ~ 1.50000MHz 15kHz~1.5MHz 15.001kHz ~ 150.000kHz 1.5kHz~150kHz 1.5001kHz ~ 15.0000kHz 150Hz~15kHz 150.01Hz ~ 1.50000kHz 15Hz~1.5kHz 15.01Hz ~ 150.00Hz 1.5Hz~150Hz 1.51Hz ~ 15.00Hz 0.15Hz~15Hz 0.01Hz ~ 1.50Hz 0.01Hz~1.5Hz
2. Please refer to the setup of frequency modulation as the example below. 3. When the modulation signal source external is selected, the Rate, Span (Deviation), Symmetry and source selection will disable as those functions are workable on internal source mode only. 4. It won't make any change on execution and result by taking different step
sequence.
5. GFG-3015 can output waveform synchronizing with its modulation function. In the example of setting up frequency modulation, the "Modulation output terminal" will output the waveform of sine at 1kHz. Example of the Setup of FM Modulation To set the following conditions: Main function: Sine Wave. Main Frequency: 100kHz. Main Output Amplitude: 10Vpp. Modulation Mode: Frequency Modulation Source: INT Procedure: Press
FUNC
Modulation rate: 1kHz. Modulation Signal Source: Sine. Modulation Deviation: 10%. Modulation Signal Symmetry: 50%.
to select SINE wave for main output.
GFG-3015
p.27
Press
AMPL
1
0
Hz/Vpp
in sequence.
0
KHz/Vrms
Then press Press Press Press Press Press Press
SHIFT
FREQ FM AM INT/EXT
1
0
in sequence.
to set FM mode. to select the source from internal signal.
KHz/Vrms
SHIFT INT/EXT RATE
RATE
1 SOURCE
in sequence.
SHIFT SOURCE SPAN SWP CF SYM
SPAN
to select the modulation signal on SINE wave.
0 DEG/%
1
in sequence. in sequence.
5
0
DEG/%
Press MOD/ON . The MOD Output BNC will output the 1kHz sine wave. In addition, you can use value you need.
and the Rotate Knob to modify the
6.13 Setup of Trigger
The Trigger function offers internal trigger source signals. Besides, You can select the signal from external (From Modulation/Trigger Input BNC). Set the main output function by pressing Set the main output Amplitude by pressing Set the main output frequency by pressing Select the Trigger type by pressing
INT/EXT
SIGL/MUT
FUNC AMPL FREQ
button . button and number keys. button and number keys.
button.
TRIG EXT
Select the Trigger signal source by pressing Press Press
RATE SWP CF SYM
button.
to set up Trigger signal RATE value (Range 0.01Hz ~ 10kHz). to set the Duty of Internal trigger signal (Range 90%:10%:90%).
Select the Trigger start Phase by pressing PHASE button and number keys. GFG-3015 offers -90º ~ +80º range for internal trigger mode. Press TRIG ON to start performing Trigger function. Note: 1. Please refer to the setup of Trigger function as the example below.
p. 28
GFG-3015
2.When the Trigger signal source from external is selected, the Rate, Phase, and Symmetry will disable as those functions are workable on internal trigger mode only. 3. It won't make any change on execution and result by taking different step
sequence.
4.The Trigger function of GFG-3015 must meet the important setting condition with the Main frequency higher than Trigger rate frequency! Example of the Setup of Trigger Function To set the following conditions: Main function: Sine Wave. Main Frequency: 5kHz. Main Output Amplitude: 10Vpp. Trigger type: Multi-trigger Procedure: Press Press
FUNC
Trigger Source: INT Trigger Signal rate: 1kHz. Trigger Phase: 30º. Trigger Signal Symmetry: 50%.
to select SINE wave for main output.
1 0 Hz/Vpp
AMPL
in sequence.
Then press Press Press Press Press Press
SIGL/MUT
FREQ
5
KHz/Vrms
in sequence.
to set Trigger Type on Multi-Trigger . to select the source from internal signal.
1
KHz/Vrms
TRIG EXT
INT/EXT RATE SWP CF SYM 5 0 DEG/%
in sequence. in sequence. in sequence.
PHASE
3
0
DEG/%
Press TRIG ON . The Trigger Function will perform on output terminal. Please see Figure (1). Besides, you can use you need.
and the Rotate Knob to modify the value
Another Example of the Setup of Trigger Function All the setting conditions are the same as above mentioned examples except the one set "Single-trigger" of the Trigger Type. Trigger type: Single-Trigger Procedure: Press SIGL/MUT to set Trigger Type to Single-Trigger . The Trigger Function will perform on output terminal. Please see Figure (2).
GFG-3015
p.29
Figure (1)
Figure (2)
6.14 Setup of GATE and BURST
The GFG-3015 provides GATE or BURST function performed with different Trigger settings. If want to set to GATE or BURST function, just proceed some simple calculation and some Trigger setting. Please refer the setup of GATE or BURST function as the example below. Example of the Setup of BURST The detailed calculated formula for BURST as below: 1. Trigger Rate period = Burst period. 2. Symmetry of Trigger signal =100% - {{[Burst period (Burst count × Main Frequency period)]/ Burst period }×100%} The Burst period > Burst Count × Main Frequency period. Set the Trigger Type to Multi-Trigger type. Because the Frequency and Symmetry of Trigger signal have their own accuracy that is different than main frequency, therefore, when the above formula is used to calculate the Symmetry, the value might have to be modified to match the Burst count as desired. To set the following conditions for BURST function example: Main function: Sine Wave. Burst period: 10ms Main Frequency: 1kHz(1mS). Burst count: 3. Main Output Amplitude: 10Vpp. Procedure: The calculation of setting: 1. Trigger Rate = Burst period = 10mS(100Hz) 2. Symmetry of Trigger signal =100% - {{[10mS (3 × 1mS)]/10mS}×100%}= 30% Press Press
FUNC
to select Sine wave for main output.
1 0 Hz/Vpp
AMPL
in sequence.
Then press Press Press
SIGL/MUT
FREQ
1
KHz/Vrms
in sequence.
to set Trigger Type on Multi-Trigger . to select the source from internal signal.
TRIG EXT
p. 30
GFG-3015
INT/EXT
Press Press Press
RATE SWP CF SYM
1
0
0
Hz/Vpp
in sequence.
3
0
DEG/%
in sequence.
PHASE
0
DEG/%
in sequence.
Press TRIG ON . The BURST Function will perform on output terminal. Please see Figure (3).
In addition, you can use and the Rotate Knob to modify the value of Trigger signal Symmetry and set the Burst count you need.
Note: 1. It won't make any change on execution and result by taking different step
sequence.
2. Use suitable external signal to set the BURST function you need. Example of the Setup of GATE The detailed calculate formula of GATE function as below: 1.Trigger Rate period = Gate period. 2.Symmetry of Trigger signal = 100% - {[(Gate period Open Gate time)/ Gate period] ×100%} The Gate period > Open Gate time. Set the Trigger Type to Multi-Trigger type. Because the Frequency and Symmetry of Trigger signal have their own accuracy that is different than main frequency, therefore, when the above formula is used to calculate the Open Gate time, the value might have to be modified to close your desire. It's a normal phenomenon that the Open Gate time may have less accuracy than your wish. To set the following conditions for Gate function Example: Main function: Triangle Wave. Gate period: 10mS Main Frequency: 1kHz(1mS). Open Gate Time: 6mS. Main Output Amplitude: 10Vpp. Procedure: The calculation of setting: 1. Trigger Rate = Gate period = 10ms(100Hz) 2. Symmetry of Trigger signal =100% - {[(10mS 6mS)/10mS]×100%}= 60% Press Press
FUNC
to select Triangle wave for main output.
1 0 Hz/Vpp
AMPL
in sequence. in sequence.
Then press Press Press
SIGL/MUT
FREQ
1
KHz/Vrms
to set Trigger Type to Multi-Trigger. to select the source from internal signal.
GFG-3015 p.31
TRIG EXT
INT/EXT
Press Press Press
RATE SWP CF SYM PHASE
1
0
0
Hz/Vpp
in sequence.
6
0
DEG/%
in sequence.
0
DEG/%
in sequence.
Press TRIG ON . The GATE Function will perform on output terminal. Please see Figure (4).
In addition, you can use and the Rotate Knob to modify the value of Trigger signal Symmetry and set the Open Gate Time you need.
Note: 1. It won't make any change on execution and result by taking different step
sequence.
2. Use suitable external signal to set the GATE function you need.
Figure (3)
Figure (4)
6.15 Setup of External Counter
The GFG-3015 provides a high performance external frequency counter and with 6 digits counter and up to 150MHz high frequency range with high resolution. Press SHIFT button, the EXT and one of the Gate time indicated GATE LEDs will light up, also, the GATE will be flashing according to the Gate time of Counter (In Counter Functions LEDs area). Now, the external counter is in enabling status.
INT/EXT INT/EXT
When the GATE is pressed, the Gate time LEDs will be according to the cycle of 0.01S, 0.1S, 1S, and 10S to display. The Different Gate time will provide different resolution of counter. So users can use the key to choose whatever the resolution they need. The detailed relation among the Test frequency, the Gate time, the State LEDs and minimum resolution is as below: Input Test Frequency 1Hz Gate Time Display Value State of LEDs Resolution 100Hz Hz 0.01 Sec 1.0000 10Hz Hz 0.1 Sec 1.00000
p. 32
GFG-3015
1 Sec 10 Sec 0.01 Sec 0.1 Sec 1 Sec 10 Sec 0.01 Sec 0.1 Sec 1 Sec 10 Sec 0.01 Sec 0.1 Sec 1 Sec 10 Sec 0.01 Sec 0.1 Sec 1 Sec 10 Sec 0.01 Sec 0.1 Sec 1 Sec 10 Sec 0.01 Sec 0.1 Sec 1 Sec 10 Sec
1.00000 000.000 10.000 10.0000 10.0000 0.00000 100.00 100.000 100.000 00.0000 1.0000 1.00000 1.00000 000.000 1.0000 1.00000 1.00000 000.000 10.0000 0.00000 0.00000 000.000 100.000 00.0000 0.00000 000.000
Hz mHz, OVER Hz Hz Hz Hz, OVER Hz Hz Hz Hz, OVER kHz kHz kHz Hz, OVER MHz MHz MHz kHz, OVER MHz MHz, OVER MHz, OVER kHz, OVER MHz MHz, OVER MHz, OVER kHz, OVER
10Hz 1Hz 1mHz 100Hz 100Hz 10Hz 10mHz 1mHz 1mHz 100Hz 100mHz 10mHz 10mHz 1mHz 100Hz 10Hz 10Hz 1Hz 100Hz 10Hz 10Hz 1Hz 1kHz 100Hz 10Hz 1Hz
10Hz
100Hz
1kHz
1MHz
10MHz
100M Hz
Note: When OVER LED is light on, The means that there are still more values than 6 digits on the Display. User can set more high Gate time to check it. Example of the External Counter To set the following conditions: Counter mode: External. Procedure:
INT/EXT GATE Press SHIFT to select External source for Counter mode. Connect the testing signal with "Counter Input BNC connector". INT/EXT
Press GATE to select the Gate time of you need. The correct frequency will be displayed. (Parameter display Area (A))
GFG-3015
p.33
6.16 THE VCF Function
The GFG-3015 also provides the function of Voltage control frequency (VCF). Input a voltage from 0 to 10V to the instrument can change the main output frequency. In other word, put a different input voltage will get a different main frequency. Basically, If user put a voltage that from 0 to 10V to instrument then the variation of main frequency will over 100 times. But that just appear in Same "Frequency variation Range". Because whole frequency range (0.01Hz ~ 15MHz) of GFG3015 is composed of 8 frequency range (The detail is as below). So User's voltage just can control at same frequency range. For example, User can't make the main frequency to 10kHz on range 7 by VCF input voltage. It must change to range 6 or 5. VCF Frequency variation Range 150kHz~15MHz 15kHz~1.5MHz 1.5kHz~150kHz 150Hz~15kHz 15Hz~1.5kHz 1.5Hz~150Hz 0.15Hz~15Hz 0.01Hz~1.5Hz
Number of Range Setting Frequency Range 8 1.5001MHz~15.0000MHz 7 150.01kHz~1.50000MHz 6 15.001kHz~150.000kHz 5 1.5001kHz~15.0000kHz 4 150.01Hz~1.50000kHz 3 15.01Hz~150.00Hz 2 1.51Hz~15.00Hz 1 0.01Hz~1.50Hz
The input voltage must be input with VCF BNC connector. If need to change "The frequency variation range", proceed 6.3 The Setup of Frequency to modify the main setting frequency. Example of the Setup of VCF To set the following conditions: Main function: Sine Wave. Main Output Amplitude: 10Vpp. Procedure: Press Press
FUNC AMPL
Hope that Main output will output 10kHz on External VCF function.
to select SINE wave for main output.
1 0 Hz/Vpp
in sequence.
1 5 0 KHz/Vrms Then press FREQ in sequence to choose suitable main output frequency for corresponding "VCF Frequency variation
Range". Input about DC 9V to "VCF input BNC connector". You will get about 10kHz sine signal from Main Output connector. Also, you can get 10kHz from VCF frequency variation range with the same procedure as above description by setting different value of input VCF voltage. Please refer to the following:
p. 34
GFG-3015
1 5 KHz/Vrms 1) Press FREQ in sequence to choose suitable main output frequency for corresponding "VCF Frequency variation Range". 2) Input about DC 3.3V to "VCF input BNC connector". 3) You will get about 10kHz Sine signal from Main Output connector.
Note: 1. It won't make any change on execution and result by taking different step
sequence.
2. If need to change difference frequency variation range in order to get maximum variation (more than 100 times) at the same range, it is to be suggested to set the main frequency on the top of each frequency range.
6.17 THE GCV Output Function
The GFG-3015 provides the function of Generate control Voltage (GCV). User can get a voltage from 0.2V to 2V from the instrument and the voltage changes following the different main output frequency setting. In other words, if change the setting of the main frequency, the voltage got from GCV output BNC connector will be changed. Basically, If user set any main frequency then It will get a relative voltage from instrument. But that just appear in same "Frequency Range". Because whole frequency range (0.01Hz ~ 15MHz) of GFG-3015 are composed of 8 frequency range (The detail is as below). So the GCV output voltage (0.2 to 2V) just appear on each same frequency range. Setting Frequency Range 15.0000MHz ~ 1.5001MHz 1.50000MHz ~ 150.01kHz 150.000kHz ~ 15.001kHz 15.0000kHz ~ 1.5001kHz 1.50000kHz ~ 150.01Hz 150.00Hz ~ 15.01Hz 15.00Hz ~ 1.51Hz 1.50Hz ~ 0.01Hz GCV Output Voltage 2 ~ 0.2V 2 ~ 0.2V 2 ~ 0.2V 2 ~ 0.2V 2 ~ 0.2V 2 ~ 0.2V 2 ~ 0.2V 2 ~ 0.2V
Example of the Setup of GCV To set the following conditions: Get 2V from GCV output BNC connector. Procedure:
1 5 0 KHz/Vrms Press FREQ in sequence. You will get about 2V from GCV output BNC connector. Also, you can get 2V from another frequency ranges with the same procedure as above description by setting different frequency value. Please refer to the following:
1) Press
FREQ
1
5
KHz/Vrms
in sequence.
GFG-3015
p.35
2) You will get about 2V from GCV output BNC connector. Note: It won't make any change on execution and result by taking different step sequence.
6.18 THE TTL Signal Output Function
The GFG-3015 provides a compatible TTL level signal from TTL Output BNC connector. The frequency of TTL signal output depends on the main output frequency. If need to modify the frequency of the signal, please refer to the procedure of 6.3 The Setup of Frequency. The amplitude of the signal is fixed at 3Vpp which can not be changed. Example of the Setup of TTL Output To set the following conditions: Main Frequency: 5kHz.
Signal Type: TTL Level.
Procedure: Set the main frequency to 5kHz(refer to 6.3 The Setup of Frequency). Connect with "TTL output BNC connector". You will get a 5kHz/TTL Level signal from the connector.
6.19 THE SYNC Signal Output Function
The GFG-3015 provides a synchronous signal with main output from SYNC Output BNC connector. The frequency of SYNC signal output synchronizes with main output. If need to modify the frequency of the signal, please refer to the procedure of 6.3 The Setup of Frequency. The amplitude of the signal is fixed at >1Vp-p open circuit which can not be changed. Example of the Setup of Sync Output To set the following conditions: Main Frequency: 10kHz. Signal Type: Synchronize with main output. Procedure: Set the main frequency to 10kHz(refer to 6.3 The Setup of Frequency). Connect with "SYNC output BNC connector". You will get a 10kHz signal synchronized with main output from the connector.
6.20 Remote Control - RS232 Interface
The GFG3015 contains a DB 9-pin, male RS-232 connector for serial communication with a computer or terminal. The GFG-3015's RS-232 interface is configured as an RS-232 "Data Terminal Equipment" so that data is sent from pin 3 and received on pin 2. For remote controls, the RS-232 interface has to be connected with a computer or terminal.
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GFG-3015
Pin Assignments The Pin assignments of the RS232 connector on the rear panel for DB-9-D.The details are listed below. 1 No connection 2 Receive Data (RxD) (input) 3 Transmit Data (TxD) (output) 4 No connection 5 Signal Ground (GND) 6 No connection 7 No connection 8 No connection 9 No connection DB9 to DB9 Wiring The wiring configuration is used for computer with DB9 connectors that configured as Data Terminal Equipment.
Figure 6.20.1 DB9 to DB9 wiring When the GFG-3015 is set up with a RS232 interface, please check the following points: Do not connect the output line of one DTE device to the output line of the other. Many devices require a constant high signal on one or more input pins. Ensure that the signal ground of the equipment is connected to the signal ground of the external device. Ensure that the chassis ground of the equipment is connected to the chassis ground of the external device. Do not use more than 15m of cable to connect devices to a PC. Ensure the same configurations are used on the device as the one used on PC terminal. Ensure the connector for the both side of cable and the internal connected line are met the demand of the instrument. Communication Mode The same baud rate and data format must be set to the instrument and the computer. The baud rate of the RS-232 interface can be set as listed in the following table.
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300 Baud 2400 Baud 19200 Baud
600 Baud 4800 Baud
1200 Baud 9600 Baud
The data transmission format is N-8-1 (no parity bit, 8 data bits, 1 stop bits). Computer's Connection A personal computer with a COM port is the essential facility in order to operate the instruction via RS232 interface. The connections between GFG-3015 and computer are as follows: Connect one end of a RS232 cable to the computer. Connect the other end of the cable to the RS232 port on the GFG-3015. Turn on the GFG-3015. Turn on the computer. The RS232 connection testing If you want to test whether the RS232 connection is working or not, you can send a command from computer. For instance, using a terminal program send the query command (uppercase) *IDN? Should return the Manufacturer, model number and firmware version in the following format: GW,GFG3015,V.1.00 If you do not receive a proper response from the GFG-3015, please check if the power is on, the RS232 configurations are the same on both sides, and all cable connections are active.
6.21 Commands Syntax
If you want to transfer any of the instructions to an instrument, there are three basic elements must be included. Command header Parameter (if required) Message terminator or separator Command Header The command header has a hierarchical structure that can be represented by a command tree.
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:SOURce
Root node
:SWEep
:WAVeform ? Lower-lev el nodes
:SYM ?
:SPACing
1
(Linear )
2
(LOG )
Leaf node
The top level of the tree is the root level. A root node is located at the root level. A root node and one or more lower-level nodes form a header path to the last node called the leaf node. The command header is configured by header path and leaf node. The below Figure shows the command header for the leaf node indicated.
:SOURce:SWEep:SPACing ?
Root Node Header Path Leaf Node
Command Header
Parameter If the command has parameters, the values have to be included. In this manual, when we express the syntax of the command, the < > symbols are used for enclosing the parameter type. For instance, the syntax of the command in the following Figure includes the Boolean parameter type
NOTE: Do not include the <, >, or | symbols when entering the actual value for a
parameter.
:SOURce:SWEep:SPACing
Space
Parameter T ype
Command Header with Parameter
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The following Table defines the Boolean and other parameter types for the GFG-3015. Parameter Type Boolean NR1 NR2 NR3 NRf Description Boolean numbers or values Integers Decimal numbers Floating point numbers NR1, NR2, or NR3 Example 1 0 0, 1, 18 1.5, 3.141, 8.4 4.5E-1,