TEXIO FGX-2005, FGX-2112 Instruction Manual

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B71-0402-01

INSTRUCTION MANUAL

Arbitrary Function Generator

FGX-2005 FGX-2112

■ About Brands and Trademarks

“TEXIO” is the product brand name of our industrial electronic devices.

All company names and product names mentioned in this manual are the trademark or the registered trademark of each company or group in each country and region.

■ About the Instruction Manual

Permission from the copyright holder is needed to reprint the contents of this manual, in whole or in part. Be aware that the product specifications and the contents of this manual are subject to change for the purpose of improvement.

CONTENTS

USING THE PRODUCT SAFELY ············································ Ⅰ -Ⅳ

1. GETTING STARTED .......................................................................... 1

1-1. Main Features ................................................................................ 1

1-2. Panel Overview .............................................................................. 2

1-3. Rear Panel ..................................................................................... 5

1-4. Display ........................................................................................... 6

1-5. Setting up the Function Generator ................................................... 7

2. QUICK REFERENCE ......................................................................... 9

2-1. How to use the Digital Inputs ........................................................... 9

2-2. Selecting a Waveform ................................................................... 10

2-2-1. Sine Wave ................................................................ ................................. 10

2-2-2. Square Wave ............................................................................................. 10

2-2-3. Ramp Wave ............................................................................................... 11

2-3. ARB ............................................................................................. 11

2-4. Modulation ................................................................................... 12

2-4-1. AM (FGX-2112 only) .................................................................................. 12

2-4-2. FM (FGX-2112 only) .................................................................................. 12

2-4-3. FSK Modulation (FGX-2112 only) .............................................................. 13

2-5. Sweep (FGX-2112 only) ................................................................ 14

2-6. Counter (FGX-2112 only) .............................................................. 15

2-7. Save/Recall .................................................................................. 15

2-7-1. Save .......................................................................................................... 15

2-7-2. Recall ........................................................................................................ 15

2-8. Default Settings ............................................................................ 16

3. OPERATION ................................................................................... 17

3-1. Select a Waveform ....................................................................... 17

3-2. Setting the Frequency ................................................................... 17

3-3. Setting the Amplitude .................................................................... 18

3-4. Setting the DC Offset .................................................................... 19

3-5. Setting the Duty Cycle/Symmetry .................................................. 20

3-6. Setting the Load Impedance .......................................................... 21

3-7. Turning the Output On .................................................................. 22

3-8. Amplitude Modulation (AM) (FGX-2112 ) ........................................ 22

3-8-1. Selecting AM Modulation ........................................................................... 22

3-8-2. AM Carrier Waveform ................................................................................ 23

3-8-3. Setting the Carrier Frequency .................................................................... 23

3-8-4. Setting the Carrier Amplitude ..................................................................... 24

3-8-5. Setting the Modulating Wave Shape.......................................................... 25

3-8-6. Setting the Modulation Frequency (Rate) .................................................. 25

3-8-7. Modulation Depth ...................................................................................... 26

3-8-8. Setting the Modulation Source................................................................... 27

3-9. Frequency Modulation (FM)(FGX-2112 ) ........................................ 28

3-9-1. Selecting FM Modulation ........................................................................... 28

3-9-2. FM Carrier Waveform ................................................................................ 29

3-9-3. Setting the Carrier Frequency .................................................................... 29

3-9-4. Setting the Carrier Amplitude ..................................................................... 30

3-9-5. Setting the Modulating Wave Shape.......................................................... 31

3-9-6. Setting the Modulation Frequency (Rate) .................................................. 31

3-9-7. Frequency Deviation .................................................................................. 32

3-9-8. Setting the Modulation Source................................................................... 33

3-10. Frequency Shift Keying (FSK) Modulation (FGX-2112 ) ................. 34

3-10-1. Selecting FSK Modulation ....................................................................... 35

3-10-2. FSK Carrier Waveform ............................................................................ 35

3-10-3. FSK Carrier Frequency ............................................................................ 35

3-10-4. Setting the Carrier Amplitude ................................................................... 36

3-10-5. Setting the Hop Frequency ...................................................................... 37

3-10-6. FSK Rate ................................................................................................. 38

3-10-7. Setting the FSK Source ........................................................................... 39

3-11. Frequency Sweep (FGX-2112 ) .................................................... 40

3-11-1. Selecting Sweep ...................................................................................... 40

3-11-2. Setting Start and Stop Frequency ............................................................ 41

3-11-3. Sweep Mode ............................................................................................ 42

3-11-4. Sweep Rate ............................................................................................. 42

3-11-5. Setting the Sweep Source (Trigger) ......................................................... 43

3-12. Creating an Arbitrary Waveform ................................................... 44

3-13. Using the Frequency Counter ...................................................... 46

3-13-1. Selecting the Frequency Counter Function.............................................. 46

3-13-2. Selecting the Gate Time .......................................................................... 46

3-14. Using the SYNC Output Port ....................................................... 47

3-14-1. Connecting the SYNC Output Port .......................................................... 47

3-14-2. SYNC Output Signal ................................................................ ................ 47

3-15. Save and Recall State/ARB Waveform ......................................... 49

4. REMOTE INTERFACE ..................................................................... 51

4-1. Selecting the USB Remote Interface .............................................. 51

4-1-1. Remote control terminal connection .......................................................... 51

4-2. Command Syntax ......................................................................... 52

4-3. Command List .............................................................................. 56

4-3-1. System Commands ................................................................................... 57

4-3-1-1. *IDN? ................................................................................................... 57

4-3-1-2. *RST .................................................................................................... 57

4-3-2. Status Register Commands ....................................................................... 57

4-3-2-1. *CLS .................................................................................................... 57

4-3-3. APPLy Commands ..................................................................................... 57

4-3-3-1. SOURce[1]:APPLy:SINusoid ............................................................... 59

4-3-3-2. SOURce[1]:APPLy:SQUare................................................................. 59

4-3-3-3. SOURce[1]:APPLy:RAMP ................................ ................................... 59

4-3-3-4. SOURce[1]:APPLy:NOISe ................................................................... 60

4-3-3-5. SOURce[1]:APPLy:USER.................................................................... 60

4-3-3-6. SOURce[1]:APPLy? ............................................................................ 61

4-3-4. Output Commands .................................................................................... 61

4-3-4-1. SOURce[1]:FUNCtion .......................................................................... 61

4-3-4-2. SOURce[1]:FREQuency ...................................................................... 62

4-3-4-3. SOURce[1]:AMPLitude ........................................................................ 63

4-3-4-4. SOURce[1]:DCOffset ........................................................................... 64

4-3-4-5. SOURce[1]:SQUare:DCYCle ............................................................... 64

4-3-4-6. SOURce[1]:RAMP:SYMMetry ............................................................. 65

4-3-4-7. OUTPut................................................................................................ 66

4-3-4-8. SOURce[1]:OUTPut:LOAD .................................................................. 66

4-3-4-9. SOURce[1]:VOLTage:UNIT ................................................................. 66

4-3-5. Amplitude Modulation (AM) Commands .................................................... 67

4-3-5-1. SOURce[1]:AM:STATe ........................................................................ 68

4-3-5-2. SOURce[1]:AM:SOURce ..................................................................... 68

4-3-5-3. SOURce[1]:AM:INTernal:FUNCtion ..................................................... 69

4-3-5-4. SOURce[1]:AM:INTernal:FREQuency ................................................. 69

4-3-5-5. SOURce[1]:AM:DEPTh ....................................................................... 69

4-3-6. Frequency Modulation (FM) Commands ................................................... 70

4-3-6-1. SOURce[1]:FM:STATe ........................................................................ 71

4-3-6-2. SOURce[1]:FM:SOURce ..................................................................... 71

4-3-6-3. SOURce[1]:FM:INTernal:FUNCtion ..................................................... 71

4-3-6-4. SOURce[1]:FM:INTernal:FREQuency ................................................. 72

4-3-6-5. SOURce[1]:FM:DEViation ................................................................... 72

4-3-7. Frequency-Shift Keying (FSK) Commands ................................................ 73

4-3-7-1. SOURce[1]:FSKey:STATe................................................................... 74

4-3-7-2. SOURce[1]:FSKey:SOURce................................................................ 74

4-3-7-3. SOURce[1]:FSKey:FREQuency .......................................................... 75

4-3-7-4. SOURce[1]:FSKey:INTernal:RATE ..................................................... 75

4-3-8. Frequency Sweep Commands .................................................................. 76

4-3-8-1. SOURce[1]:SWEep:STATe ................................................................. 76

4-3-8-2. SOURce[1]:FREQuency:STARt .......................................................... 77

4-3-8-3. SOURce[1]:FREQuency:STOP ........................................................... 77

4-3-8-4. SOURce[1]:SWEep:SPACing .............................................................. 78

4-3-8-5. SOURce[1]:SWEep:RATE ................................................................... 78

4-3-8-6. SOURce[1]:SWEep:SOURce .............................................................. 78

4-3-9. Frequency Counter Commands................................................................. 79

4-3-9-1. COUNter:GATe ................................................................................... 79

4-3-9-2. COUNter:STATe .................................................................................. 79

4-3-9-3. COUNter:VALue? ................................................................................ 80

4-3-10. Arbitrary Waveform Commands ............................................................... 80

4-3-10-1. SOURce[1]:FUNCtion USER ............................................................. 81

4-3-10-2. DATA:DAC ........................................................................................ 81

4-3-11. Save and Recall Commands ................................................................... 82

4-3-11-1. *SAV .................................................................................................. 82

4-3-11-2. *RCL .................................................................................................. 82

5. APPENDIX ...................................................................................... 84

5-1. Error Messages ............................................................................ 84

5-2. FGX-2000 Series Specifications .................................................... 85

5-3. External Dimensions Figure .......................................................... 88

USING THE PRODUCT SAFELY

■ Preface

To use the product safely, read instruction manual to the end. Before using this product, understand how to correctly use it. If you read the manuals but you do not understand how to use it, ask us or your local dealer. After you read the manuals, save it so that you can read it anytime as required.

■ Pictorial indication

The manuals and product show the warning and caution items required to safely use the product. The following pictorial indication is provided.

Pictorial

indication

Some part of this product or the manuals may show this pictorial indication. In this case, if the product is incorrectly used in that part, a serious danger may be brought about on the user's body or the product. To use the part with this pictorial indication, be sure to refer to the manuals.

WARNING

If you use the product, ignoring this indication, you may get killed or seriously injured. This indication shows that the warning item to avoid the danger is provided.

CAUTION

If you incorrectly use the product, ignoring this indication, you may get slightly injured or the product may be damaged. This indication shows that the caution item to avoid the danger is provided.

Please be informed that we are not responsible for any damages to the user or to the third person, arising from malfunctions or other failures due to wrong use of the product or incorrect operation, except such responsibility for damages as required by law.

USING THE PRODUCT SAFELY

WARNING

CAUTION

■ Do not remove the product's covers and panels

Never remove the product's covers and panels for any purpose. Otherwise, the user's electric shock or fire may be incurred.

■ Warning on using the product

Warning items given below are to avoid danger to user's body and life and avoid the damage or deterioration of the product. Use the product, observing the following warning and caution items.

■ Warning items on power supply

● Power supply voltage

The rated power supply voltages of the product are 100, 120, 220 and 240VAC. The rated power supply voltage for each product should be confirmed by reading the label attached on the back of the product or by the “rated” column shown in the instruction manual. The specification of power cord attached to the products is rated to 125VAC for all products which are designed to be used in the areas where commercial power supply voltage is not higher than 125VAC. Accordingly, you must change the power cord if you want to use the product at the power supply voltage higher than 125VAC. If you use the product without changing power cord to 250VAC rated one, electric shock or fire may be caused. When you used the product equipped with power supply voltage switching system, please refer to the corresponding chapter in the instruction manuals of each product.

● Power cord

(IMPORTANT) The attached power cord set can be used for

this device only.

If the attached power cord is damaged, stop using the product and call us or your local dealer. If the power cord is used without the damage being removed, an electric shock or fire may be caused.

● Protective fuse

If an input protective fuse is blown, the product does not operate. For a product with external fuse holder, the fuse may be replaced. As for how to replace the fuse, refer to the corresponding chapter in the instruction manual. If no fuse replacement procedures are indicated, the user is not permitted to replace it. In such case, keep the case closed and consult us or your local dealer. If the fuse is incorrectly replaced, a fire may occur.

III

USING THE PRODUCT SAFELY

■ Warning item on Grounding

If the product has the GND terminal on the front or rear panel surface, be sure to ground the product to safely use it.

■ Warnings on Installation environment

● Operating temperature and humidity

Use the product within the operating temperature indicated in the “rating” temperature column. If the product is used with the vents of the product blocked or in high ambient temperatures, a fire may occur. Use the product within the operating humidity indicated in the “rating” humidity column. Watch out for condensation by a sharp humidity change such as transfer to a room with a different humidity. Also, do not operate the product with wet hands. Otherwise, an electric shock or fire may occur.

● Use in gas

Use in and around a place where an inflammable or explosive gas or steam is generated or stored may result in an explosion and fire. Do not operate the product in such an environment. Also, use in and around a place where a corrosive gas is generated or spreading causes a serious damage to the product. Do not operate the product in such an environment.

● Installation place

Do not insert metal and inflammable materials into the product from its vent and spill water on it. Otherwise, electric shock or fire may occur.

■ Do not let foreign matter in

Do not insert metal and inflammable materials into the product from its vent and spill water on it. Otherwise, electric shock or fire may occur.

■ Warning item on abnormality while in use

If smoke or fire is generated from the product while in use, stop using the product, turn off the switch, and remove the power cord plug from the outlet. After confirming that no other devices catch fire, ask us or your local dealer.

USING THE PRODUCT SAFELY

■ Input / Output terminals

Maximum input to terminal is specified to prevent the product from being damaged. Do not supply input, exceeding the specifications that are indicated in the "Rating" column in the instruction manual of the product. Also, do not supply power to the output terminals from the outside. Otherwise, a product failure is caused.

■ Calibration

Although the performance and specifications of the product are checked under strict quality control during shipment from the factory, they may be deviated more or less by deterioration of parts due to their aging or others. It is recommended to periodically calibrate the product so that it is used with its performance and specifications stable. For consultation about the product calibration, ask us or your local dealer.

■ Daily Maintenance

When you clean off the dirt of the product covers, panels, and knobs, avoid solvents such as thinner and benzene. Otherwise, the paint may peel off or resin surface may be affected. To wipe off the covers, panels, and knobs, use a soft cloth with neutral detergent in it. During cleaning, be careful that water, detergents, or other foreign matters do not get into the product. If a liquid or metal gets into the product, an electric shock and fire are caused. During cleaning, remove the power cord plug from the outlet.

Use the product correctly and safely, observing the above warning and caution items. Because the instruction manual indicates caution items even in individual items, observe those caution items to correctly use the product.

If you have questions or comments about the manuals, ask us or E-Mail us.

1. GETTING STARTED

The Getting started chapter introduces the function generator’s main features, appearance and introduces a quick instructional summary of some of the basic functions. For comprehensive operation instructions, please see the operation chapter.

1-1. Main Features

Model name

FGX-2005

FGX-2112

Frequency Range

0.1Hz~5MHz

0.1Hz~12MHz

Output waveform

Sine, Square, Ramp, Noise, ARB

Amplitude range

1 mVpp to 10 Vpp (into 50Ω)

2 mVpp to 20 Vpp (open-circuit)

Variable Offset

✓

Variable Duty

✓

SYNC (TTL) output

✓

Save/Recall

✓

Sweep operation

—

✓

AM /FM / FSK

—

✓

Frequency Counter

—

✓

ARB

✓

USB Interface

✓

Performance

• DDS technology using an FPGA provides high resolution

waveforms

• 12MHz/5MHz DDS (Direct Digital Synthesis) signal

output series

• 0.1Hz resolution

• Full Function Arbitrary Waveform Capability

20 MSa/s sample rate 10 MHz repetition rate 4 k-point waveform length 10-bit amplitude resolution Ten 4k waveform memories

Features

• Sine, Square, Ramp, Noise

• Int/Ext AM, FM, FSK modulation

• Modulation/sweep signal output

• Save/recall 10 groups of setting memories

• Output overload protection

Interface

• USB interface as standard

• 3.5 inch LCD

1-2. Panel Overview

FGX-2112 Front Panel

ARB

OUTPUT

50W

SYNC

MAIN

OUTPUT

POWERSave/Recall INT/EXT Hop LIN/LOG

Shape DEP /DEV Rate Start/Stop Gate

FUNC

FREQ

AMPL

OFST

DUTY

Point

Value

7 8 9

4 5 6

1 2 3

Hz/Vpp kHz/Vrms MHz/dBm % Shift

AM FM FSK Sweep Count

OUTPUT

Enter

Arbitrary Function Generator

LCD Display

Number pad

Scroll Wheel

MAIN output port

ARB keys Power

button

Output control key

Enter key

Arrow keys SYNC output

port

Operation keys

Function keys

High-Z/50Ω

LCD display

3.5 inch, 3 color LCD display.

Keypad

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7 8

The digital keypad is used to enter values and parameters. The keypad is often used in conjunction with the selection keys and variable knob.

Scroll Wheel

The scroll wheel is used to edit values and parameters in steps of 1 digit. Used in conjunction with the arrow keys.

Decrease Increase

Arrow keys

Used to select digits when editing parameters.

Output ports

OUTPUT

SYNC

MAIN

OUTPUT

SYNC output port (50Ω impedance). Main output port (50Ω impedance).

Enter key

Enter

Used to confirm input values.

Power button

POWER

Turns the instrument power on/off.

Output control key

OUTPUT

Turns the output on/off.

Load Impedance

Shift

High Z/50Ω

OUTPUT

Toggles the load impedance between 50Ω and High-Z.

Operation keys

Hz/Vpp

Selects Hz or Vpp units.

Shift

Save/Recall

Hz/Vpp

Saves or recalls waveforms from memory.

kHz/Vrms

Selects kHz or Vrms units.

Shift

INT/EXT

kHz/Vrms

Sets the source to internal or external for the modulation and FSK functions*.

MHz/dBm

Selects MHz or dBm units.

Shift

Hop

MHz/dBm

Sets the “Hop” frequency for FSK

modulation*.

Selects % units.

Shift

LIN/LOG

Sets the sweep to linear or logarithmic*.

Shift

The shift key is used to select the secondary functions on the operation keys.

The AM key is used to turn AM modulation on/off*.

Shift

Shape

Selects the modulation waveform*.

The FM key is used to turn FM modulation on/off*.

Shift

DEP/DEV

Selects the modulation depth or the frequency deviation*.

FSK

Selects FSK modulation*.

Shift

Rate FSK

Sets the AM, FM, FSK modulation and sweep function rate*

Sweep

Selects the Sweep function*.

Shift

Start/Stop

Sweep

Sets the Start or Stop frequency*.

Count

Turns the frequency counter on/off*.

Shift

Gate

Count

Sets the frequency counter gate time*.

ARB edit keys

ARB

Value

Point

Arbitrary waveform editing keys. The Point key sets the ARB point numbers. The Value key sets the amplitude value of the selected point.

Function keys

FUNC

The FUNC key is used to select the output waveform type: Sine, Square, Ramp, Noise, ARB.

FREQ

Sets the frequency of the selected waveform.

AMPL

Sets the amplitude of the selected waveform.

OFST

The OFST sets the DC offset for the selected waveform.

DUTY

The DUTY key sets the duty cycle of square and ramp waveforms.

*indicates functions/features for the FGX-2112 only.

1-3. Rear Panel

FGX-2112 Rear Panel

NO OPERATOR SERVICEABLE COMPONENTS INSIDE. DO NOT REMOVE COVERS. REFER SERVICING TO

TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE GROUNDING CONDUCTOR MUST BE CONNECTED TO GROUND.

WARNING

QUALIFIED PERSONNEL.

SER.NO. LABEL

AC 100-240V 50-60Hz 25VA

OUTPUT INPUT

MOD Counter

Trigger MOD

MOD input

Trigger input

MOD output

Type B USB portPower socket

Counter input

FGX-2005 Rear Panel

NO OPERATOR SERVICEABLE COMPONENTS INSIDE. DO NOT REMOVE COVERS. REFER SERVICING TO

TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE GROUNDING CONDUCTOR MUST BE CONNECTED TO GROUND.

WARNING

QUALIFIED PERSONNEL.

SER.NO. LABEL

AC 100-240V 50-60Hz 25VA

Type B USB portPower socket

MOD output

OUTPUT INPUT

MOD Counter

Trigger MOD

Modulation output port.

Counter input

Counter input port.

MOD input

Modulation input port.

Trigger input

Trigger input port.

Type B USB port

The type B USB port is used to connect the function generator to a PC for remote control.

Power Socket Input

AC 100-240V 50-60Hz 25VA

Power input: 100~240V AC 50~60Hz.

1-4. Display

Waveform type

Counter settings

USB icon

Frequency display

Secondary parameter display

Modulation, sweep, counter menu

Waveform type

Press the function key to cycle through different output waveforms.

Counter settings

Gate time counter settings*.

USB icon

Shows the USB interface status.

Frequency Display

Displays the main waveform frequency settings.

Secondary parameter display

Displays secondary waveform parameters and settings.

Modulation, sweep, counter menu

Displays the modulation, sweep and counter functions as well as the modulating waveform and source*.

*indicates functions/features for the FGX-2112 only.

1-5. Setting up the Function Generator

Background

This section describes how adjust the handle and power up the function generator.

Adjusting the stand

Pull out the handle sideways and rotate it.

ARB

OUTPUT

50W

SYNC

MAIN

OUTPUT

POWER

Save/Recall INT/EXT Hop LIN/LOG

Shape DEP/DEV Rate Start/Stop Gate

FUNC

FREQ

AMPL

OFST

DUTY

Point

Value

7 8 9

4 5 6

1 2 3

Hz/Vpp kHz/Vrms MHz/dBm % Shift

AM FM FSK Sweep Count

OUTPUT

Enter

Arbitrary Function Generator

Place the FGX horizontally.

Place the handle upright to tilt the stand.

Place the handle vertically to hand carry.

Power Up

1. Connect the power cord to the socket on the rear panel.

2. Press the power button on the front panel.

POWER

3. The instrument will turn on and load the last settings that were used before the power was turned off.

The function generator is now ready to be used.

2. QUICK REFERENCE

This chapter lists operation shortcuts and default factory settings. Use this chapter as a handy reference for instrument functions. This chapter is to be used as a quick reference; for detailed explanations on parameters, settings and limitations, please see the operation chapter (page 17) or specifications (page 85).

2-1. How to use the Digital Inputs

Background

The FGX-2000 has three main types of digital inputs: the number pad, arrow keys and the scroll wheel. The following instructions will show you how to use the digital inputs to edit parameters.

1. First select the function that must be edited pressing one of the function or ARB keys. The selected function will flash.

ARB

OUTPUT

50W

SYNC

MAIN

OUTPUT

POWERSave/Recall

FUNC

FREQ

AMPL

OFST

DUTY

Point

Value

7 8 9

4 5 6

1 2 3

Hz/Vpp kHz/Vrms MHz/ dBm % Shift

OUTPUT

Enter

ARB keys

Function keys

2. To edit a parameter, use the arrow keys to move the cursor to the digit that needs to be edited.

cursor

3. Use the scroll wheel to increment the parameter by the resolution of the digit under the cursor. In the example above, the scroll wheel will increment the parameter in 0.1 volt increments. Clockwise increases the value, counterclockwise decreases the value.

4. Press the Enter key to confirm the new parameter value.

Enter

5. Alternatively, the number pad can be used to set the value of the selected parameter.

321

7 8

6. To finish editing with the number pad, select the unit with one of the unit keys. (Hz, kHz, MHz, Vpp, Vrms, dBm, %)

Hz/Vpp

kHz/Vrms

MHz/dBm

2-2. Selecting a Waveform

2-2-1. Sine Wave

Example: Sine Wave, 10kHz, 1Vpp, 2Vdc

Output

MAIN

1. Press the FUNC key repeatedly to select the Sine wave.

FUNC

→

2. Press FREQ > 1 > 0 > kHz.

FREQ

kHz/Vrms

3. Press AMPL > 1 > Vpp.

AMPL

Hz/Vpp

4. Press OFST > 2 > Vpp.

OFST

Hz/Vpp

5. Press the OUTPUT key.

OUTPUT

2-2-2. Square Wave

Example: Square Wave, 10kHz, 3Vpp, 75% duty cycle

Output

MAIN

1. Press the FUNC key repeatedly to select the Square wave.

FUNC

→

2. Press FREQ > 1 > 0 > kHz.

FREQ

kHz/Vrms

3. Press AMPL > 3 > Vpp.

AMPL

Hz/Vpp

4. Press DUTY > 7 > 5 > %.

DUTY

5. Press the output key.

OUTPUT

2-2-3. Ramp Wave

Example: Ramp Wave, 10kHz, 3Vpp, 25% symmetry

Output

MAIN

1. Press the FUNC key repeatedly to select the Ramp wave.

FUNC

→

2. Press FREQ > 1 > 0 > kHz.

FREQ

kHz/Vrms

3. Press AMPL > 3 > Vpp.

AMPL

Hz/Vpp

4. Press DUTY > 2 > 5 > %.

DUTY

5. Press the OUTPUT key.

OUTPUT

2-3. ARB

Example: 2 ARB points, 10 kHz, 1Vpp.

Output

MAIN

1. Press the FUNC key repeatedly to select the ARB wave.

FUNC

→

2. Press FREQ > 1 > 0 > kHz.

FREQ

kHz/Vrms

3. Press AMPL > 1 > Vpp.

AMPL

Hz/Vpp

4. Press Point > 0 > Enter.

Point

Enter

5. Press Value > 5 > 1 >1 > Enter.

Value

511

Enter

6. Press Point > 1 > Enter.

Point

Enter

7. Press Value > ± > 5 > 1

>1 > Enter.

(-511)

Value

511

Enter

8. Press the OUTPUT key.

OUTPUT

2-4. Modulation

2-4-1. AM (FGX-2112 only)

Example: AM modulation. 100Hz modulating square wave. 1 Vpp, 1kHz Sine wave carrier. 70% modulation depth. Internal source signal.

Output

MAIN

1. Press the FUNC key repeatedly to select the Sine wave.

FUNC

→

2. Press FREQ > 1 > kHz.

FREQ

kHz/Vrms

3. Press AMPL > 1 > Vpp.

AMPL

Hz/Vpp

4. Press AM.

5. Press Shift > INT/EXT > select INT source.

Shift

INT/EXT

kHz/Vrms

6. Press Shift > Shape repeatedly to select the Square wave.

Shift

Shape

→

7. Press Shift > Rate > 1 > 0 > 0 > Hz.

Shift

Rate FSK

100

Hz/Vpp

8. Press Shift > DEP/DEV> 7 > 0 > %.

Shift

DEP/DEV

9. Press the OUTPUT key.

OUTPUT

10. Press AM again to deselect the AM function.

2-4-2. FM (FGX-2112 only)

Example: FM modulation. 100Hz modulating square wave. 1Vpp, 1kHz Sine wave carrier. 100 Hz frequency deviation. Internal Source.

Output

MAIN

1. Press the FUNC key repeatedly to select the Sine wave.

FUNC

→

2. Press FREQ > 1 > kHz.

FREQ

kHz/Vrms

3. Press AMPL > 1 > Vpp.

AMPL

Hz/Vpp

4. Press FM.

5. Press Shift > INT/EXT > select INT source.

Shift

INT/EXT

kHz/Vrms

6. Press Shift > Shape repeatedly to select Square wave.

Shift

Shape

→

7. Press Shift > Rate > 1 > 0 > 0 > Hz.

Shift

Rate FSK

Hz/Vpp

8. Press Shift >

DEP/DEV> 1 > 0 > 0> Hz

Shift

DEP/DEV

Hz/Vpp

9. Press the OUTPUT key.

OUTPUT

10. Press FM again to deselect the AM function.

2-4-3. FSK Modulation (FGX-2112 only)

Example: FSK modulation. 10Hz Hop frequency. 1Vpp, 1kHz Ramp carrier wave. 100 Hz Rate (modulation frequency). Internal Source.

Output

MAIN

1. Press the FUNC key repeatedly to select the Ramp wave.

FUNC

→

2. Press FREQ > 1 > kHz.

FREQ

kHz/Vrms

3. Press AMPL > 1 > Vpp.

AMPL

Hz/Vpp

4. Press FSK.

FSK

5. Press Shift > INT/EXT > select INT source.

Shift

INT/EXT

kHz/Vrms

6. Press Shift > Rate > 1 > 0 > 0 > Hz.

Shift

Rate FSK

Hz/Vpp

7. Press Shift > Hop > 1 > 0 > Hz.

Shift

Hop

MHz/dBm

Hz/Vpp

8. Press the OUTPUT key.

OUTPUT

9. Press FSK again to deselect the FSK function.

FSK

2-5. Sweep (FGX-2112 only)

Example: Frequency Sweep. Start Frequency 1Hz, Stop Frequency 1MHz. 1Hz Rate. 1Vpp. Linear Sweep.

Output

MAIN

1. Press the FUNC key repeatedly to select the Ramp wave.

FUNC

→

2. Press AMPL > 1 > Vpp.

AMPL

Hz/Vpp

3. Press Sweep.

Sweep

4. Press Shift > INT/EXT > select INT source.

Shift

INT/EXT

kHz/Vrms

5. Press Shift > Start/Stop select Start> 1 > Hz.

Shift

Start/Stop

Sweep

Hz/Vpp

6. Press Shift > Start/Stop select Stop> 1 > MHz.

Shift

Start/Stop

Sweep

MHz/dBm

7. Press Shift > Rate > 1 > Hz.

Shift

Rate FSK

Hz/Vpp

8. Press Shift > LIN/LOG > select LINS.

Shift

LIN/LOG

9. Press the OUTPUT key.

OUTPUT

10. Press Sweep again to deselect the sweep function.

Sweep

2-6. Counter (FGX-2112 only)

Example: Frequency counter function, gate time 1s.

Input

OUTPUT INPUT

MOD Counter

FSK MOD

1. Press the Count key.

Count

2. Press Shift > Gate repeatedly to select the 1S gate time.

Shift

Gate

Count

3. Connect the signal to the counter input signal.

4. Press Count again to deselect the counter function.

Count

2-7. Save/Recall

2-7-1. Save

Example: Save waveform to memory.

1. Press Shift >

Save/Recall. Select Save.

Shift

Save/Recall

Hz/Vpp

2. Turn the scroll wheel and choose a save number.

3. Press Enter to confirm the save file number.

Enter

2-7-2. Recall

Example: Recall waveform from memory.

1. Press Shift >

Save/Recall. Select Recall.

Shift

Save/Recall

Hz/Vpp

2. Turn the scroll wheel and choose a saved file number.

3. Press Enter to confirm the recall.

Enter

2-8. Default Settings

The default settings can be loaded by using the *RST command or pressing the following keys:Duty,1,2,3,4,8,Enter

Output Config.

Function

Sine wave

Frequency

1kHz

Amplitude

100mVpp

Offset

0.00Vdc

Output units

Vpp

Output terminal

50Ω

Load impedance

50Ω

Modulation (AM/FM/FSK)

Carrier Wave

1kHz Sine wave

Modulation waveforms

100Hz Sine wave

AM Depth

100%

FM Deviation

10Hz

FSK Hop Frequency

100Hz

FSK Frequency

500Hz

Modulation Status

Off

Sweep

Start/Stop frequency

100Hz/1kHz

Sweep time

1s Sweep rate

100Hz

Sweep type

Linear

Sweep status

Off

System settings

Power off signal

Display mode

Error queue

cleared

Memory settings (ARB)

No change

Output

Off

Interface config.

USB

CDC

Calibration

Calibration Menu

Restricted

3. OPERATION

The Operation chapter shows how to output basic waveforms and create ARB waveforms. The FGX-2112 can also perform advanced functions such as modulation, sweep, FSK and counter functions.

3-1. Select a Waveform

The FGX-2000 can output four standard waveforms: sine, square, ramp and noise waveforms.

Panel Operation

1. Press the FUNC key repeatedly to select a standard waveform (Sine, Square, Ramp, Noise).

FUNC

→

Example: Sine wave

Note

The modulation, FSK, sweep and counter functions must be disabled before a standard waveform can be output.

3-2. Setting the Frequency

Panel Operation

Press the FREQ key.

FREQ

The FREQ icon will flash in the frequency display area.

Use the arrow keys, scroll wheel and Enter key to edit the frequency.

→

Enter

Use the keypad and the relevant unit key to enter a new frequency.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range Sine

0.1Hz ~ 12MHz*

Square

0.1Hz ~ 12MHz*

Ramp

0.1Hz ~ 1MHz

*limited to 5MHz for the FGX-2005, 12MHz for the FGX-2112.

Example: FREQ = 1kHz

3-3. Setting the Amplitude

Panel Operation

1. Press the AMPL key.

AMPL

2. The AMPL icon will flash in the secondary display

area.

3. Use the arrow keys,

scroll wheel and Enter key to edit the amplitude.

→

Enter

Use the keypad and the relevant unit key to enter a new amplitude.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

No load

2mVpp~20Vpp

50Ω Load

1mVpp~10Vpp

Example: AMPL= 1Vpp

3-4. Setting the DC Offset

Panel Operation

1. Press the OFST key.

OFST

2. The OFST icon will flash in the secondary display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the offset.

→

Enter

Use the keypad and the Vpp key to enter a new offset.

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→

Hz/Vpp

Range

No Load (AC+DC)

±10Vpk

50Ω Load (AC+DC)

±5 Vpk

Example: OFST= 1VDC

3-5. Setting the Duty Cycle/Symmetry

Background

The DUTY key sets the duty cycle or symmetry of the standard square or ramp waveforms.

Panel Operation

1. Ensure a square or ramp waveform is selected.

Page 17

2. Press the DUTY key.

DUTY

3. The duty icon will flash in the secondary display area.

4. Use the arrow keys, scroll wheel and Enter key to edit the duty cycle/symmetry.

→

Enter

Use the keypad and the % key to enter a new duty cycle/symmetry.

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→

Duty Cycle Range

≤ 100kHz

1.0% ~ 99.0%

≤ 5MHz

20.0% ~ 80.0%

≤ 10MHz

40.0 ~ 60.0%

≤ 12MHz

50.0% (fixed)

10% 50% 90%

Symmetry Range

All frequencies

0% ~ 100%

0% 50% 100%

Example: DUTY= 50.0%

3-6. Setting the Load Impedance

Background

The FGX-2000 load impedance can be set to 50Ω or to High-Z. When the load impedance is set to high-Z the effect output is doubled compared to the

default 50Ω. For example, when the amplitude is set

to 10Vpp (impedance of 50Ω) when the load

impedance is switched to high-Z, the amplitude becomes 20Vpp.

Note

dBm units are not supported for the high-Z load impedance. If the amplitude unit is dBm, and you switch to the High-Z load impedance, the amplitude unit will automatically change to Vpp. If the load impedance is set to High-Z, you cannot set the amplitude units to dBm. Change the load impedance back to 50Ω first.

Panel Operation

1. To toggle the load impedance between 50 and High-Z, press SHIFT+OUTPUT.

Shift

High Z/50Ω

OUTPUT

2. The selected load impedance will flash momentarily on the display.

50 Ω:

High-Z:

3-7. Turning the Output On

Panel Operation

1. Press the OUTPUT key to output the selected waveform.

High Z/50Ω

OUTPUT

The output key will turn green when the output is on.

OUTPUT OUTPUT

2. To disable the output, press the OUTPUT key again.

High Z/50Ω

OUTPUT

The output key will turn off when the output is disabled.

OUTPUT OUTPUT

3-8. Amplitude Modulation (AM) (FGX-2112 )

An AM waveform is produced from a carrier waveform and a modulating waveform. The amplitude of the modulated carrier waveform depends on the amplitude of the modulating waveform. The FGX-2112 function generator can set the carrier frequency, amplitude and offset as well as internal or external modulation sources. AM modulation is only applicable for the FGX-2112 function generators.

Modulated Carrier Waveform

Modulating waveform

3-8-1. Selecting AM Modulation

Panel Operation

1. Press the AM key.

2. The modulation, sweep and counter menu display will appear. The AM icon indicates that the AM function is active.

Example: AM activated

Note

AM modulation can be deactivated by pressing the AM key again.

3-8-2. AM Carrier Waveform

Background

The FUNC key selects the AM carrier waveform. Sine, square or ramp waveforms can be used as the carrier. The default waveform is set to sine. Noise is not available as a carrier shape. Before the carrier shape can be selected, ensure AM is active, page 38.

Selecting the Carrier Shape

1. Press the FUNC key repeatedly to select a carrier waveform (Sine, Square, Ramp).

FUNC

→

Range

AM Carrier Shape

sine, square, ramp

3-8-3. Setting the Carrier Frequency

Panel Operation

1. Press FREQ key.

FREQ

2. The FREQ icon will flash in the frequency display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the frequency.

→

Enter

Use the keypad and the relevant unit key to enter a new frequency.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

Sine

0.1Hz ~ 12MHz

Square

0.1Hz ~ 12MHz

Ramp

0.1Hz ~ 1MHz

Example: FREQ = 1kHz

3-8-4. Setting the Carrier Amplitude

Panel Operation

1. Press AMPL key.

AMPL

2. The AMPL icon will flash in the secondary display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the amplitude.

→

Enter

Use the keypad and the relevant unit key to enter a new amplitude.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

No Load

2mVpp~20Vpp

50Ω Load

1mVpp~10Vpp

Example: AMPL= 1Vpp

3-8-5. Setting the Modulating Wave Shape

The FGX-2112 has sine, square and Triangle modulating waveform shapes. Sine waves are the default wave shape.

Panel Operation

1. Press the Shift + Shape key repeatedly to select a shape waveform.

Shift

Shape

→

2. The waveform Shape is displayed in blue at the bottom of the panel.

Restrictions

Square

50% duty cycle

Triangle

50% symmetry

Example: Shape = Sine

3-8-6. Setting the Modulation Frequency (Rate)

Panel Operation

1. Press the Shift + Rate key.

Shift

Rate FSK

2. The Rate icon will flash in the frequency display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the rate.

→

Enter

Use the keypad and the relevant unit key to enter a new rate.

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→

Hz/Vpp

kHz/Vrms

Range

(Internal source)

2mHz ~ 20kHz

Default

100Hz

Example: Rate= 100Hz

3-8-7. Modulation Depth

Modulation depth is the ratio (as a percentage) of the unmodulated carrier amplitude and the minimum amplitude deviation of the modulated waveform. In other words, modulation depth is the maximum amplitude of the modulated waveform compared to the carrier waveform as a percentage.

Panel Operation

1. Press the Shift + DEP/DEV key.

Shift

DEP/DEV

2. The DEP icon will flash in the secondary display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the modulation depth.

→

Enter

Use the keypad and the % key to enter a new depth.

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→

Range

Depth

0% ~ 120%

Default

100%

Example: DEP= 100%

Note

When the modulation depth is greater than 100%, the output cannot exceed ±5VPeak (50Ω load). If an external modulation source is selected, modulation depth is limited to ±5V from the MOD input port on the rear panel. For example, if the modulation depth is set to 100%, then the maximum amplitude is +5V, and the minimum amplitude is -5V.

3-8-8. Setting the Modulation Source

Panel Operation

1. Press the Shift + INT/EXT key to select the modulation source.

Shift

INT/EXT

kHz/Vrms

→

2. The modulation source will be displayed at the bottom of the screen.

Note

If an external modulation source is selected, modulation depth is limited to ± 5V from the MOD input port on the rear panel. For example, if the modulation depth is set to 100%, then the maximum amplitude is +5V, and the minimum amplitude is

-5V.

Example: Source = INT

Example: External MOD input signal

AM output

MOD input

signal

+5V

-5V

3-9. Frequency Modulation (FM)(FGX-2112 )

An FM waveform is produced from a carrier waveform and a modulating waveform. The instantaneous frequency of the carrier waveform varies with the magnitude of the modulating waveform. FM modulation is only applicable to the FGX-2112.

Modulated Carrier Waveform

Modulating waveform

3-9-1. Selecting FM Modulation

Panel Operation

1. Press the FM key.

2. The modulation, sweep and counter menu display will appear. The FM icon indicates that the FM function is active.

Example: FM activated

Note

FM modulation can be deactivated by pressing the FM key again.

3-9-2. FM Carrier Waveform

Background

The FUNC key selects the FM carrier waveform. Sine, square or ramp waveforms can be used as the carrier. The default waveform is set to sine. Noise is not available as a carrier shape. Before the carrier shape can be selected, ensure FM is active, page 28.

Selecting the Carrier Shape

1. Press the FUNC key repeatedly to select a carrier waveform (Sine, Square, Ramp).

FUNC

→

Range

FM Carrier Shape

sine, square, ramp

3-9-3. Setting the Carrier Frequency

Background

When using the FGX-2112 function generator, the carrier frequency must be equal to or greater than the frequency deviation.

Panel Operation

1. Press FREQ key.

FREQ

2. The FREQ icon will flash in the frequency display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the frequency.

→

Enter

Use the keypad and the relevant unit key to enter a new frequency.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

Sine

0.1Hz ~ 12MHz

Square

0.1Hz ~ 12MHz

Ramp

0.1Hz ~ 1MHz

Example: FREQ = 1kHz

3-9-4. Setting the Carrier Amplitude

Panel Operation

1. Press AMPL key.

AMPL

2. The AMPL icon will flash in the secondary display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the amplitude.

→

Enter

Use the keypad and the relevant unit key to enter a new amplitude.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

No Load

2mVpp~20Vpp

50Ω load

1mVpp~10Vpp

Example: AMPL= 1Vpp

3-9-5. Setting the Modulating Wave Shape

The FGX-2112 has sine, square and Triangle modulating waveform shapes. Sine waves are the default wave shape. The modulating wave shape is for internal sources only.

Panel Operation

1. Press the Shift + Shape key repeatedly to select a shape waveform.

Shift

Shape

→

2. The waveform Shape is displayed in blue at the bottom of the panel.

Restrictions

Square

50% duty cycle

Triangle

50% symmetry

Example: Shape = Sine

3-9-6. Setting the Modulation Frequency (Rate)

Panel Operation

1. Press the Shift + Rate key.

Shift

Rate FSK

2. The Rate icon will flash in the frequency display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the rate.

→

Enter

Use the keypad and the relevant unit key to enter a new rate.

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→

Hz/Vpp

kHz/Vrms

Range

(Internal source)

2mHz ~ 20kHz

Default

100Hz

Example: Rate= 100Hz

3-9-7. Frequency Deviation

The frequency deviation is the peak frequency deviation from the carrier wave and the modulated wave.

Panel Operation

1. Press the Shift + DEP/DEV key.

Shift

DEP/DEV

2. The DEV icon will flash in the frequency display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the frequency deviation.

→

Enter

Use the keypad and the relevant unit key to enter a new frequency deviation.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

Sine

DC ~ 12MHz

Square

DC ~ 12MHz

Ramp

DC ~ 1MHz

Default

10Hz

Note

The frequency deviation must be equal to or less than the carrier frequency. The sum of the carrier frequency and frequency deviation must be less than or equal to the maximum carrier. The maximum frequency deviation allowed will be limited by the set carrier frequency.

Example: DEV = 10Hz

3-9-8. Setting the Modulation Source

Panel Operation

1. Press the Shift + INT/EXT key to select the modulation source.

Shift

INT/EXT

kHz/Vrms

→

2. The modulation source will be displayed at the bottom of the screen.

Range

Source

INT, EXT

Connection (EXT source only)

For external sources, connect the modulation source signal to the MOD input port on the rear panel.

OUTPUT INPUT

MOD Counter

Trigger MOD

Note

When the source is set to EXT (external) the carrier waveform is modulated by an external signal. The frequency deviation is controlled by the ±5V signal that is input into the MOD input port. The ±5V input signal directly corresponds to the set frequency deviation. +5V increases the frequency by the set deviation frequency and -5V reduces the frequency to below the carrier frequency by the amount set by

the deviation frequency. For example: if the deviation frequency is set to 1kHz, an input voltage of +5V will increase the frequency to 1kHz, whilst an input voltage of -5V will reduce the frequency below that of the carrier by 1kHz.

Example: Source = INT

Example: External MOD input signal

FM output

MOD input

signal

+5V

-5V

3-10. Frequency Shift Keying (FSK) Modulation (FGX-2112 )

Frequency Shift Keying Modulation is used to shift the frequency output of the function generator between two preset frequencies (carrier frequency, hop frequency). The frequency at which the carrier and hop frequency shift is determined by the rate setting or the voltage level from the Trigger input port on the rear panel. FSK modulation is only applicable to the FGX-2112.

Hop Frequency

Carrier Frequency

3-10-1. Selecting FSK Modulation

Panel Operation

1. Press the FSK key.

FSK

2. The modulation, sweep and counter menu display will appear. The FSK icon indicates that the FSK function is active.

Example: FSK activated

Note

FSK modulation can be deactivated by pressing the FSK key again.

3-10-2. FSK Carrier Waveform

Background

The FUNC key selects the FSK carrier waveform. Sine, square or ramp waveforms can be used as the carrier. The default waveform is set to sine. Noise and ARB cannot be used as a carrier wave.

Selecting the Carrier

1. Press the FUNC key repeatedly to select a carrier waveform (Sine, Square, Ramp).

FUNC

→

Range

FSK Carrier Shape

sine, square, ramp

3-10-3. FSK Carrier Frequency

The maximum carrier frequency depends on the carrier shape. The default carrier frequency for all carrier shapes is 1kHz. The voltage level of the Trigger input port controls the output frequency when EXT is selected as the source. When the Trigger input signal is logically low, the carrier frequency is output and when the signal is logically high, the hop frequency is output.

Panel Operation

1. Press FREQ key.

FREQ

2. The FREQ icon will flash in the frequency display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the frequency.

→

Enter

Use the keypad and the relevant unit key to enter a new frequency.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

Sine

0.1Hz ~ 12MHz

Square

0.1Hz ~ 12MHz

Ramp

0.1Hz ~ 1MHz

Example: FREQ = 1kHz

3-10-4. Setting the Carrier Amplitude

Panel Operation

1. Press AMPL key.

AMPL

2. The AMPL icon will flash in the secondary display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the amplitude.

→

Enter

Use the keypad and the relevant unit key to enter a new amplitude.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

No Load

2mVpp~20Vpp

50Ω Load

1mVpp~10Vpp

Example: AMPL= 1Vpp

3-10-5. Setting the Hop Frequency

The default Hop frequency for all waveform shapes is 100 Hz. A square wave with a duty cycle of 50% is used for the internal modulation waveform. The voltage level of the Trigger input signal controls the output frequency when EXT is selected. When the Trigger input signal is logically low the carrier frequency is output and when the signal is logically high, the hop frequency is output.

Panel Operation

1. Press the Shift + Hop key.

Shift

Hop

MHz/dBm

2. The Hop icon will flash in the frequency display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the hop frequency.

→

Enter

Use the keypad and the relevant unit key to enter a hop frequency.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

Sine

0.1Hz ~ 12MHz

Square

0.1Hz ~ 12MHz

Ramp

0.1Hz ~ 1MHz

Default

100Hz

Example: Hop = 100Hz

3-10-6. FSK Rate

FSK Rate function is used to determine the rate at which the output frequency changes between the carrier and hop frequencies. The FSK Rate function only applies to internal FSK sources.

Panel Operation

1. Press the Shift + Rate key.

Shift

Rate FSK

2. The Rate icon will flash in the frequency display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the rate.

→

Enter

Use the keypad and the relevant unit key to enter a new rate.

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→

Hz/Vpp

kHz/Vrms

Range

(Internal source)

2mHz ~ 20kHz

Default

100Hz

Example: Rate= 1KHz

3-10-7. Setting the FSK Source

The FGX-2000 accepts internal and external FSK sources, with internal as the default source. When the FSK source is set to internal, the FSK rate is configured using the FSK Rate function. When an external source is selected the FSK rate is equal to the frequency of the Trigger input signal on the rear panel. When the input signal is logically low the carrier frequency is output and when the signal is logically high, the hop frequency is output.

Panel Operation

1. Press the Shift + INT/EXT key to select the modulation source.

Shift

INT/EXT

kHz/Vrms

→

2. The FSK source will be displayed at the bottom of the screen.

Range

Source

INT, EXT

Connection (EXT source only)

For external sources, connect the FSK rate source signal to the Trigger input port on the rear panel.

OUTPUT INPUT

MOD Counter

Trigger MOD

Example: Source = EXT

Example: External trigger input signal

FSK output

Trigger input

signal

3-11. Frequency Sweep (FGX-2112 )

The function generator can perform a sweep for sine, square or ramp waveforms, but not noise, and ARB. In Sweep mode, the function generator will sweep from a start frequency to a stop frequency over a number of designated steps. If an external source is selected, the function generator can be used to output a single sweep each time a TTL level pulse is received from the Trigger input port. The step spacing of the sweep can be linear or logarithmic. The function generator can also sweep up or sweep down in frequency. The Sweep function only applies to the FGX-2112.

Sweep

3-11-1. Selecting Sweep

Panel Operation

1. Press the Sweep key.

Sweep

2. The modulation, sweep and counter menu display will appear. The Sweep icon indicates that the Sweep function is active.

Example: Sweep activated

Note

Sweep modulation can be deactivated by pressing the Sweep key again.

3-11-2. Setting Start and Stop Frequency

The start and stop frequencies define the upper and lower sweep limits. The function generator will sweep from the start through to the stop frequency and cycle back to the start frequency. The sweep is phase continuous over the full sweep range.

Panel Operation

1. Pressing the Shift + Start/Stop key will toggle between the start and stop frequencies. Select the Start frequency icon.

Shift

Start/Stop

Sweep

→ Start

2. The Start icon will flash in the frequency display area when selected.

3. Use the arrow keys, scroll wheel and Enter key to edit the start frequency.

→

Enter

Use the keypad and the relevant unit key to enter a new start frequency.

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→

Hz/Vpp

kHz/Vrms

MHz/dBm

Range

Sine

0.1Hz ~ 12MHz

Square

0.1Hz ~ 12MHz

Ramp

0.1Hz ~ 1MHz

Default

Start: 100Hz, Stop: 1kHz

4. Repeat steps 1 to 3 for the Stop frequency.

Note

To sweep from a low to high frequency, set the Start frequency < Stop frequency.

To sweep from a high to low frequency, set the Start frequency > Stop frequency.

Example: Start = 100Hz

Example: Stop = 1kHz

3-11-3. Sweep Mode

Sweep mode is used to select between linear or logarithmic sweeping. Linear sweeping is the default setting.

Panel Operation

1. Press the Shift + LIN/LOG key to select linear (LINS) or logarithmic (LOGS) sweeps.

Shift

LIN/LOG

→

2. The LINS or LOGS icon will be displayed at the bottom of the screen.

Example: Sweep = LINS

3-11-4. Sweep Rate

The sweep rate is used to determine how long it takes to perform a sweep from the start to stop frequencies. The function generator automatically determines the number of discrete frequencies used in the scan depending on the length of the scan.

Panel Operation

1. Press the Shift + Rate key.

Shift

Rate FSK

2. The Rate icon will flash in the frequency display area.

3. Use the arrow keys, scroll wheel and Enter key to edit the rate.

→

Enter

Use the keypad and the relevant unit key to enter a new rate.

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→

Hz/Vpp

kHz/Vrms

Range

Sweep Rate

1kHz ~ 2mHz (1ms ~ 500s)

Default

100Hz

Example: Rate= 100Hz

3-11-5. Setting the Sweep Source (Trigger)

With the source set to EXT, the function generator will sweep each time a trigger signal is received. After a sweep output has completed, the function generator waits for a trigger signal before starting the next sweep. The default trigger source is internal.

Panel Operation

1. Press the Shift + INT/EXT key to select the modulation source.

Shift

INT/EXT

kHz/Vrms

→

2. The Trigger source will be displayed at the bottom of the screen.

Range

Source

INT, EXT

Connection (EXT source only)

For external sources, connect the Sweep trigger signal to the Trigger input port on the rear panel.

OUTPUT INPUT

MOD Counter

Trigger MOD

Example: Source = EXT

Note

With an external source, a sweep is output each time a trigger pulse (TTL) is received from the Trigger input port on the rear panel. The trigger frequency must be greater than the sweep rate (sweep time) plus 125nS (trigger pulse width > 125nS).

Example: External trigger input signal

Sweep output

Trigger input

signal

3-12. Creating an Arbitrary Waveform

Both the FGX-2000 has a simple arbitrary waveform editing function. The ARB function is able to create waveforms with a 20MHz sampling rate, 4k data points with vertical range of ±511points.

Selecting the Carrier Shape

1. Press the FUNC key repeatedly to select the ARB function.

FUNC

→

2. Press the Point key.

Point

3. Point will flash in the secondary display area.

4. Use the scroll wheel or keypad to choose a point number.

321

7 859

Use the Enter key to confirm the point number.

Enter

Range

Point:

0 ~ 4096

5. Press the Value key.

Point

6. Value will flash in the secondary display area.

7. Use the scroll wheel or keypad to choose the vertical value of the selected point.

321

7 859

Use the Enter key to confirm the point value.

Enter

Range

Value:

±511 (10-bit vertical resolution)

8. Repeat steps 2 to 7 for the remaining points of the ARB waveform.

Note

The horizontal position of the points depends on the set frequency. For example, if the set frequency is 1kHz (period = 1ms), then each point will be located every

0.01ms (1ms/sample rate).

Example:

Point “0” is set to

+511.

Note

To save the ARB data, please see the Save/Recall section on page.15

3-13. Using the Frequency Counter

3-13-1. Selecting the Frequency Counter Function

Connection

Connect the signal source to Counter input port on the rear panel.

OUTPUT INPUT

MOD Counter

MOD

Trigger

Panel Operation

1. Press the Count key.

Gate

Count

2. The current gate time and the Count icon will appear in the display when the counter function is active. The input frequency will be shown in the frequency display area.

Example: input frequency of 1kHz

3-13-2. Selecting the Gate Time

Panel Operation

1. Ensure the Count function is active.

Page 46

2. Press the Shift + Gate key repeatedly to select the desired gate time.

Shift

Gate

Count

Range

Gate time

0.01s, 0.1s, 1s, 10s

3. The current gate time is displayed in the counter settings area of the display.

3-14. Using the SYNC Output Port

3-14-1. Connecting the SYNC Output Port

Background

The SYNC output port is used as a synchronization signal for function outputs. All the output signals apart from the noise output function have a synchronization signal.

Connection

Connect a BNC cable from the SYNC output port on the front panel to the desired input device.

OUTPUT

SYNC

OUTPUT

Note

The SYNC signal is output even when the main output is not output.

3-14-2. SYNC Output Signal

SYNC Output For Sine Wave

SYNC output: TTL square waveform with a 50% duty cycle. The SYNC output is at a logically high level when the sine output is positive.

Output diagram

Sine output

SYNC output

SYNC Output For Square Wave

SYNC output: TTL square waveform with a duty cycle corresponding to the duty cycle of the output square wave. The SYNC output is at a logically high level when the square wave output is positive.

Output diagram

Square wave

output

SYNC output

SYNC Output For Ramp Wave

SYNC output: TTL square waveform with a 50% duty cycle. The SYNC output is at a logically high level when the ramp output is positive.

Output diagram

Ramp wave

output

SYNC output

SYNC Output For ARB Wave

SYNC output: A single TTL positive pulse at the start of each ARB period (pulse width = 1/sample rate).

Output diagram

ARB output

SYNC output

SYNC Output For AM

SYNC output: TTL square waveform with a 50% duty cycle. The SYNC output is at a logically high level when the modulated output is positive.

Output diagram

AM output

SYNC output

SYNC Output For FM

SYNC output: TTL square waveform with a 50% duty cycle. The SYNC output is at a logically high level when the modulated output is positive (The SYNC output is synchronized to the modulated output frequency).

Output diagram

FM output

SYNC output

SYNC Output For FSK

Output diagram

FSK output

SYNC output

SYNC Output For Sweep

SYNC output: TTL square waveform. The SYNC output is at a logically high level when the sweep output is positive (The SYNC output is synchronized to the sweep output frequency).

Output diagram

Sweep output

SYNC output

3-15. Save and Recall State/ARB Waveform

The FGX-2000 has non-volatile memory to store instrument state and ARB data. There are 10 memory locations numbered 0~19. Memory locations 0~9 saves/recalls the instrument state, memory locations 10~19 saves / recalls ARB data. The instrument saves the following states: the selected function (including ARB), frequency, amplitude, DC offset, duty cycle / symmetry, and any of the modulation parameters.

Panel Operation

1. Press the Shift + Save/Recall key to either select Save (to save the state) or Recall (to recall the state).

Shift

Save/Recall

Hz/Vpp

→ Save

2. Save or Recall will be shown in the secondary display area.

3. Use the scroll wheel or keypad to choose the save/recall number.

321

7 859

Use the Enter key to save/recall the state.

Enter

Note

The instrument state can be saved to any 10 (0~9) of the storage locations. ARB data can be saved to any 10 (10~19) instrument locations. When a state is saved, it overwrites the previously saved state in the same location. If ARB data is recalled, the current state will be overwritten. A memory location can only be recalled if it has been previously saved.

Example: Save State

Example: Recall State

4. REMOTE INTERFACE

4-1. Selecting the USB Remote Interface

The FGX-2000 uses a USB interface for remote control. Connecting to USB

USB configuration

PC side connector

Type A, host

FGX side connector

Type B, slave

Speed Class USB Driver

1.1/2.0 (full speed) CDC Class *.inf

Panel Operation

1. Connect the Type B USB - USB-A cable from the PC to the type B USB port on the rear panel.

2. When the PC asks for the USB driver, select inf file included in the CD or download the driver from our website, www.texio.co.jp If there is no request of the driver by the PC, please specify the inf file to update the device driver of FGX at the "Other devices" in the Device Manager of the PC.

3. The USB icon will appear when the USB connection is active.

4-1-1. Remote control terminal connection

Terminal application

Invoke the terminal application such as Hyper Terminal. Make note of the COM port, baud rate, stop bit, data bit, and parity accordingly from the Windows Device Manager.To check the COM port settings, see the Device Manager from Control Panel in the PC. For Windows.

Functionality check

Run this query command via the terminal. *idn? This should return the Manufacturer, Model number, Serial number, and Firmware version in the following format. TEXIO, FGX-2112, SN:XXXXXXXX,Vm.mm

Note

^j and ^m can be used as the terminal character when using a terminal program.

PC Software

The proprietary PC software, downloadable from TEXIO website, can be used to download waveforms.

4-2. Command Syntax

Compatible standard

• IEEE488.2, 1992 (fully compatible)

• SCPI, 1994 (partially compatible)

Command Tree

The SCPI standard is an ASCII based standard that defines the command syntax and structure for programmable instruments.

Commands are based on a hierarchical tree structure. Each command keyword is a node on the command tree with the first keyword as the root node. Each sub node is separated with a colon.

Shown below is a section of the SOURce[1] root node and the APPLy/OUTPut and SINusoid/SQUare sub nodes.

SOURce[1|2]

:OUTPut :APPLy

:SINusoid :SQUare

Root node

2nd node

3rd node

Command types

Commands can be separated into three distinct types, simple commands, compound commands and queries.

Simple

A single command with/without a parameter

Example

*OPC

Compound

Two or more commands separated by a colon (:) with/without a parameter

Example

SOURce:APPLy:SQUare

Query

A query is a simple or compound command followed by a question mark (?). A parameter (data) is returned. The maximum or minimum value for a parameter can also be queried where applicable.

Example

SOURce1:FREQuency? SOURce1:FREQuency? MIN

Command forms

Commands and queries have two different forms, long and short. The command syntax is written with the short form of the command in capitals and the remainder (long form) in lower case.

SOURce1:DCOffset

long long

short short

The commands can be written in capitals or lower-case, just so long as the short or long forms are complete. An incomplete command will not be recognized. Below are examples of correctly written commands:

LONG:

SOURce1:DCOffset

SOURCE1:DCOFFSET

source1:dcoffset

SHORT:

SOUR1:DCO

sour1:dco

Command Format

SOURce1:DCOffset < offset>LF

1 32

1: command header 2: single space 3: parameter 4: message terminator

Square Brackets [ ]

Commands that contain squares brackets indicate that the contents are optional. The function of the command is the same with or without the square bracketed items. Brackets are not sent with the command.

For example, the frequency query below can use any of the following 3 forms: SOURce1:FREQuency? [MINimum|MAXimum]

SOURce1:FREQuency? MAXimum SOURce1:FREQuency? MINimum SOURce1:FREQuency?

Braces { }

Commands that contain braces indicate one item within the braces must be chosen. Braces are not sent with the command.

Angled Brackets < >

Angle brackets are used to indicate that a value must be specified for the parameter. See the parameter description below for details. Angled brackets are not sent with the command.

Bars |

Bars are used to separate multiple parameter choices in the command format.

Parameters

Type

Description

Example

Boolean logic

0, 1/ON,OFF

<NR1>

integers

0, 1, 2, 3

<NR2>

decimal numbers

0.1, 3.14, 8.5

<NR3>

floating point

4.5e-1, 8.25e+1

<NRf>

any of NR1, 2, 3

1, 1.5, 4.5e-1

<NRf+> <Numeric>

NRf type with a suffix including MINimum, MAXimum or DEFault parameters.

1, 1.5, 4.5e-1 MAX, MIN, DEF

<aard>

Arbitrary ASCII characters.

Discrete ASCII character parameters

IMM, EXT, MAN

NRf+ type including frequency unit suffixes.

1 KHZ, 1.0 HZ, ΜHZ <amplitude>

NRf+ type including voltage unit suffixs.

VPP, dBm, Vrms

NRf+ type including voltage unit suffixes.

NRf+ type including time unit suffixes.

nS, uS, mS, S

NRf type

N/A Message terminators

LF CR

line feed code (new line) and carriage return.

line feed code (new line)

Note

^j or ^m should be used when using a terminal program.

Command Separators Space

A space is used to separate a parameter from a keyword/command header.

Colon (:)

A colon is used to separate keywords on each node.

Semicolon (;)

A semicolon can be used to combine commands from different node levels. For example: SOURce1:PWM:SOURce? SOURce:PULSe:WIDTh? →SOURce1:PWM:SOURce?;SOURce: PULSe:WIDTh?

Comma (,)

When a command uses multiple parameters, a comma is used to separate the parameters. For example: SOURce:APPLy:SQUare 10KHZ,2.0 VPP,-1VDC

4-3. Command List

4-3-1. System Commands ................................................................................... 57

4-3-2. Status Register Commands ....................................................................... 57

4-3-2-1. *CLS ....................................................................................................... 57

4-3-3. APPLy Commands ..................................................................................... 57

4-3-3-1. SOURce[1]:APPLy:SINusoid .................................................................. 59

4-3-3-2. SOURce[1]:APPLy:SQUare ................................................................... 59

4-3-3-3. SOURce[1]:APPLy:RAMP ...................................................................... 59

4-3-3-4. SOURce[1]:APPLy:NOISe ...................................................................... 60

4-3-3-5. SOURce[1]:APPLy:USER ...................................................................... 60

4-3-3-6. SOURce[1]:APPLy? ............................................................................... 61

4-3-4. Output Commands .................................................................................... 61

4-3-4-1. SOURce[1]:FUNCtion ............................................................................ 61

4-3-4-2. SOURce[1]:FREQuency ......................................................................... 62

4-3-4-3. SOURce[1]:AMPLitude ........................................................................... 63

4-3-4-4. SOURce[1]:DCOffset.............................................................................. 64

4-3-4-5. SOURce[1]:SQUare:DCYCle ................................................................. 64

4-3-4-6. SOURce[1]:RAMP:SYMMetry ................................................................ 65

4-3-4-7. OUTPut .................................................................................................. 66

4-3-4-8. SOURce[1]:OUTPut:LOAD..................................................................... 66

4-3-4-9. SOURce[1]:VOLTage:UNIT .................................................................... 66

4-3-5. Amplitude Modulation (AM) Commands .................................................... 67

4-3-5-1. SOURce[1]:AM:STATe ............................................................................ 68

4-3-5-2. SOURce[1]:AM:SOURce ........................................................................ 68

4-3-5-5. SOURce[1]:AM:DEPTh .......................................................................... 69

4-3-6. Frequency Modulation (FM) Commands ................................................... 70

4-3-6-1. SOURce[1]:FM:STATe ............................................................................ 71

4-3-6-2. SOURce[1]:FM:SOURce ........................................................................ 71

4-3-6-5. SOURce[1]:FM:DEViation ...................................................................... 72

4-3-7. Frequency-Shift Keying (FSK) Commands ................................................ 73

4-3-7-1. SOURce[1]:FSKey:STATe ...................................................................... 74

4-3-7-2. SOURce[1]:FSKey:SOURce .................................................................. 74

4-3-7-3. SOURce[1]:FSKey:FREQuency ............................................................. 75

4-3-8. Frequency Sweep Commands .................................................................. 76

4-3-8-1. SOURce[1]:SWEep:STATe ..................................................................... 76

4-3-8-2. SOURce[1]:FREQuency:STARt ............................................................. 77

4-3-8-3. SOURce[1]:FREQuency:STOP .............................................................. 77

4-3-8-4. SOURce[1]:SWEep:SPACing ................................................................. 78

4-3-8-5. SOURce[1]:SWEep:RATE ...................................................................... 78

4-3-8-6. SOURce[1]:SWEep:SOURce ................................................................. 78

4-3-9. Frequency Counter Commands................................................................. 79

4-3-9-1. COUNter:GATe ....................................................................................... 79

4-3-9-2. COUNter:STATe ..................................................................................... 79

4-3-9-3. COUNter:VALue? ................................................................................... 80

4-3-10. Arbitrary Waveform Commands ............................................................... 80

4-3-10-1. SOURce[1]:FUNCtion USER ................................................................ 81

4-3-10-2. DATA:DAC ............................................................................................ 81

4-3-11. Save and Recall Commands ................................................................... 82

4-3-11-1. *SAV ..................................................................................................... 82

4-3-11-2. *RCL ..................................................................................................... 82

4-3-1. System Commands

4-3-1-1. *IDN?

Query

Description

Returns the function generator manufacturer, model number, serial number and firmware version number in the following format: TEXIO,FGX-2005,SN:XXXXXXXX,Vm.mm

Query Syntax

IDN?

Return parameter

Query Example

*IDN? > TEXIO,FGX-2005,SN:XXXXXXXX,Vm.mm

Returns the identification of the function generator.

4-3-1-2. *RST

Set

Description

Reset the function generator to its factory default state.

Note

Note the *RST command will not delete instrument save states/ARB waveforms in memory.

Syntax

*RST

4-3-2. Status Register Commands

4-3-2-1. *CLS

Set

Description

The *CLS command clears all the event registers, the error queue and cancels an *OPC command.

Syntax

*CLS

4-3-3. APPLy Commands

The APPLy command has 5 different types of outputs (Sine, Square, Ramp, Noise, User(ARB)). The APPLy command is the quickest, easiest way to output waveforms remotely. Frequency, amplitude and offset can be specified for each function. As only basic parameters can be set with the APPLy command, other parameters, such as duty and symmetry use the instrument default values. The APPLy command will set the trigger source to immediate and disable modulation and sweep modes, if active. The command also turns on the output command SOURce[1]:OUTP ON.

As the frequency, amplitude and offset parameters are in nested square

brackets, the amplitude can only be specified if the frequency has been specified and the offset can only be specified if the amplitude has been set. See the syntax below for the example:

SOURce1:APPLy:<function> [<frequency> [,<amplitude> [,<offset>] ]]

Output Frequency

For the output frequency, MINimum, MAXimum and DEFault can be used instead of specifying a frequency. The default frequency for all functions is set to 1 kHz.

The maximum and minimum frequency depends on the function used and the model of the frequency generator. If a frequency output that is out of range is specified, the max/min frequency will be used instead. A “-222” error will be generated from the remote terminal.

Function

Min frequency

Max frequency

Sine

0.1Hz

12MHz*

Square

0.1Hz

12MHz*

Ramp

0.1Hz

1MHz

Noise

Not applicable

User (ARB)

0.1Hz

12MHz

*The FGX-2005 is limited to 5MHz.

Output Amplitude

When setting the amplitude, MINimum, MAXimum and DEFault can be used instead of specifying an amplitude. The range depends on the function being used. The default amplitude for all functions is 100 mVpp (into 50Ω).

Vrms, dBm or Vpp units can be used to specify the output units to use with the current command. Note, however, that the VOLT:UNIT command can be used to set the default units (Vrms, dBm, Vpp) for all commands. This will be applicable to the APPLy command when no unit is specified. The unit default is set to Vpp.

The output amplitude can be affected by the function and unit chosen. Vpp and Vrms or dBm values may have different maximum values due to differences such as crest factor. For example, a 5Vrms square wave will be adjusted to 3.536 Vrms for a sine wave.

DC Offset voltage

The offset parameter can be set to MINimum, MAXimum or DEFault instead of a specified DC offset value. The default DC offset is 0 volts.

The maximum and minimum DC offset is limited by the

output amplitude as shown below. |Voffset| < Vmax – Vpp/2

This means that the magnitude of the DC offset is determined by the output amplitude. If the specified DC offset is out of range, the maximum/minimum offset will be set instead. A “-222” error will be generated from the remote terminal.

4-3-3-1. SOURce[1]:APPLy:SINusoid

Set

Description

Outputs a sine wave when the command has executed. Frequency, amplitude and offset can also be set.

Syntax

SOURce[1]:APPLy:SINusoid [<frequency> [,<amplitude> [,<offset>] ]]

Parameter

0.1Hz~12MHz*

1mV~10Vpp (50Ω)

-5V ~ +5V (50Ω)

*FGX-2005 limited to 5MHz.

Example

SOURce1:APPL:SIN MAX, 3.0, -2.5

Outputs a 3Vpp sine wave at 12MHz (max frequency) with a -2.5V offset.

4-3-3-2. SOURce[1]:APPLy:SQUare

Set

Description

Outputs a square wave when the command has executed. Frequency, amplitude and offset can also be set. The duty cycle is fixed to 50%.

Syntax

SOURce[1]:APPLy:SQUare [<frequency> [,<amplitude> [,<offset>] ]]

Parameter

0.1Hz ~ 12MHz*

1mV~10V (50Ω)

-5V ~ +5V (50Ω)

*FGX-2005 limited to 5MHz.

Example

SOURce1:APPL:SQU MAX, DEF, DEF

Outputs a 100mVpp (DEF) square wave at 12MHz with 0 offset (DEF).

4-3-3-3. SOURce[1]:APPLy:RAMP

Set

Description

Outputs a ramp wave when the command has executed. Frequency, amplitude and offset can also be set. The symmetry is fixed to 100%.

Syntax

SOURce[1]:APPLy:RAMP [<frequency> [,<amplitude> [,<offset>] ]]

Parameter

0.1Hz~1MHz

1mV~10V (50Ω)

-5V ~ +5V (50Ω)

Example

SOUR1:APPL:RAMP 2KHZ,MAX,MAX

Sets the frequency to 2kHz and sets the amplitude and offset to the maximum.

4-3-3-4. SOURce[1]:APPLy:NOISe

Set

Description

Outputs Gaussian noise with a 20 MHz bandwidth. Amplitude and offset can also be set.

Note

The Frequency parameter is not used with the noise function; however a value (or DEFault) must still be specified. The frequency is remembered for the next function used.

Syntax

SOURce[1]:APPLy:NOISe [<frequency|DEFault> [,<amplitude> [,<offset>] ]]

Parameter

0.1Hz~12MHz*

1mV~10V (50Ω)

-5V ~ +5V (50Ω)

*FGX-2005 limited to 5MHz.

Example

SOURce1:APPL:NOIS DEF, 5.0, 2.0

Sets the amplitude to 5 volts with an offset of 2 volts. 4-3-3-5. SOURce[1]:APPLy:USER

Set

Description

Outputs an arbitrary waveform that is specified from the FUNC:USER command.

Note

Frequency and amplitude values are not used with this function; however a value (or DEFault) must be specified. The values are remembered for the next function used.

Syntax

SOURce[1]:APPLy:USER [<frequency> [,<amplitude> [,<offset>] ]]

Parameter

0.1Hz~10MHz

1mV~10V (50Ω)

-5V ~ +5V (50Ω)

Example

SOUR1:APPL:USER

Outputs the ARB waveform specified in the FUNC:USER command.

4-3-3-6. SOURce[1]:APPLy?

Query

Description

Outputs a string with the current settings.

Note

The returned string can be passed back, when appended to the APPLy Command. This is intended to be used to return the function generator to a known state. I.e., SOURce[1]:APPL:<passed back string>

Query Syntax

SOURce[1]:APPLy?

Return Parameter

Function(<NRf>), frequency(<NRf>), amplitude(<NRf>),offset(<NRf>)

Query Example

SOUR1:APPL? >”SIN +5.0000000000000E+03,+3.0000E+00,-2.50E+00”

Returns a string with the current function and parameters, Sine, 5kHz, 3Vpp, -2.5V offset.

4-3-4. Output Commands

Unlike the APPLy commands, the Output commands are low level commands to program the function generator. This section describes the low-level commands used to program the function generator. Even though the APPLy command is the easiest way to program the function generator, it lacks the ability to change individual parameters. The Output commands on the other hand can be used to set individual parameters, or those parameters that cannot be programmed with the APPLy command.

4-3-4-1. SOURce[1]:FUNCtion

Set

Query

Description

The FUNCtion command selects and outputs the selected output function. The User parameter outputs an arbitrary waveform previously set by the SOURce[1]:FUNC:USER command. The previously set frequency, amplitude and offset values are used automatically.

Note

If the function mode is changed and the current frequency setting is not supported by the new mode, the frequency setting will be altered to the next highest value. Vpp and Vrms or dBm amplitude values may have different maximum values due to differences such as crest factor. For example, if a 5Vrms square wave is changed to a sinewave, then the Vrms value is automatically adjusted to

3.536Vrms.

The modulation and sweep modes can only be used with some of the basic waveforms. If a mode is not supported, the conflicting mode will be disabled. See the table below.

Sine

Square

Ramp

Noise

ARB

✓



✓



FSK

✓



SWEEP

✓



Syntax

SOURce[1]:FUNCtion {SINusoid|SQUare|RAMP |NOISe |USER}

Example

SOUR1:FUNC SIN

Sets the output as a sine function.

Query Syntax

SOURce[1]:FUNCtion?

Return Parameter

SIN, SQU, RAMP, NOIS, USER

Returns the current output type. Query Example

SOUR1:FUNC?

>SIN

Current output is sine.

4-3-4-2. SOURce[1]:FREQuency

Set

Query

Description

Sets the output frequency for the SOURce[1]:FUNCtion command. The query command returns the current frequency setting.

Note

The maximum and minimum frequency depends on the function mode.

Sine, Square

0.1Hz~12MHz*

Ramp

0.1Hz ~ 1MHz

Noise

Not applicable

User

0.1Hz~12MHz*

*FGX-2005 limited to 5MHz.

If the function mode is changed and the current frequency setting is not supported by the new mode, the frequency setting will be altered to the next highest value.

The duty cycle of square waveforms depends on the frequency settings: 1% to 99% (frequency < 100KHz) 20% to 80% (100KHz < frequency < 5 MHz) 40% to 60% (5 MHz < frequency < 10 MHz) 50% (frequency > 10 MHz)

If the frequency is changed and the set duty cycle cannot support the new frequency, the highest duty cycle available at that frequency will be used. A “-221” error will be generated from the remote terminal.

Syntax

SOURce[1]:FREQuency {<frequency>|MINimum|MAXimum}

Example

SOUR1:FREQ MAX

Sets the frequency to the maximum for the current mode.

Query Syntax

SOURce[1]:FREQuency?

Return Parameter

<NR3>

Returns the frequency for the current mode. Query Example

SOUR1:FREQ? MAX

>+1.0000000000000E+03

The maximum frequency that can be set for the current function is 1MHz.

4-3-4-3. SOURce[1]:AMPLitude

Set

Query

Description

Sets the output amplitude for the SOURce[1]:FUNCtion command. The query command returns the current amplitude settings.

Note

The maximum and minimum amplitude depends on the output termination. The default amplitude for all functions is 100 mVpp (50Ω). The offset and amplitude are related by the following equation. |Voffset| < Vmax – Vpp/2 The output amplitude can be affected by the function and unit chosen. Vpp and Vrms or dBm values may have different maximum values due to differences such as crest factor. For example, a 5Vrms square wave will be adjusted to 3.536 Vrms for a sine wave. The amplitude units can be explicitly used each time the SOURce[1]:AMPLitude command is used. Alternatively, the VOLT:UNIT command can be used to set the amplitude units for all commands.

Syntax

SOURce[1]:AMPLitude {< amplitude> |MINimum|MAXimum}

Example

SOUR1:AMPL MAX

Sets the amplitude to the maximum for the current mode.

Query Syntax

SOURce[1]:AMPLitude? {MINimum|MAXimum}

Return Parameter

<NR3>

Returns the amplitude for the current mode.

Query Example

SOUR1:AMPL? MAX

>+5.0000E+00

The maximum amplitude that can be set for the current function is 5 volts.

4-3-4-4. SOURce[1]:DCOffset

Set

Query

Description

Sets or queries the DC offset for the current mode.

Note

The offset parameter can be set to MINimum or MAXimum. The default offset is 0 volts. The offset is limited by the output amplitude as shown below. |Voffset| < Vmax – Vpp/2 If the output specified is out of range, the maximum offset will be set. The maximum offset is ±5V into 50Ω).

Syntax

SOURce[1]:DCOffset {< offset> |MINimum|MAXimum}

Example

SOUR1:DCO MAX

Sets the offset to the maximum for the current mode.

Query Syntax

SOURce[1]:DCOffset? {MINimum|MAXimum}

Return Parameter

<NR3>

Returns the offset for the current mode. Query Example

SOUR1:DCO?

>+3.0000E+00

The offset for the current mode is set to +3 volts.

4-3-4-5. SOURce[1]:SQUare:DCYCle

Set

Query

Description

Sets or queries the duty cycle for square waves only. The setting is remembered if the function mode is changed. The default duty cycle is 50%.

Note

The duty cycle of square waveforms depend on the frequency settings.

1% to 99% (frequency < 100KHz) 20% to 80% (100KHz < frequency < 5 MHz) 40% to 60% (5 MHz < frequency < 10 MHz) 50% (frequency > 10 MHz

For square waveforms, the APPLy command and AM/FM modulation modes ignore the duty cycle settings.

Syntax

SOURce[1]:SQUare:DCYCle {< percent> |MINimum|MAXimum}

Example

SOUR1:SQU:DCYC MAX

Sets the duty cycle to the highest possible for the current frequency.

Query Syntax

SOURce[1]:SQUare:DCYCle? {MINimum|MAXimum}

Return Parameter

<NR3>

Returns the duty cycle as a percentage. Query Example

SOUR1:SQU:DCYC?

>+5.00E+01

The duty cycle is set 50%.

4-3-4-6. SOURce[1]:RAMP:SYMMetry

Set

Query

Description

Sets or queries the symmetry for ramp waves only. The setting is remembered if the function mode is changed. The default symmetry is 100%. 0% symmetry is a ramp waveform with a negative going transition. 100% symmetry is a ramp waveform with a positive going transition.

0% 50% 100%

Note

For ramp waveforms, the Apply command and AM/FM modulation modes ignore the current symmetry settings.

Syntax

SOURce[1]:RAMP:SYMMetry {< percent> |MINimum|MAXimum}

Example

SOUR[1]:RAMP:SYMM MAX

Sets the symmetry to the 100%.

Query Syntax

SOURce[1]:RAMP:SYMMetry? {MINimum|MAXimum}

Return Parameter

<NR3>

Returns the symmetry as a percentage. Query Example

SOUR1:RAMP:SYMMetry?

>+1.0000E+02

The symmetry is set as 100%.

4-3-4-7. OUTPut

Set

Query

Description

Enables/Disables or queries the front panel output. The default is set to off.

Syntax

OUTPut {OFF|ON}

Example

OUTP ON

Turns the output on.

Query Syntax

OUTPut?

Return Parameter

1 0 ON OFF

Query Example

OUTP?

The output is currently on.

4-3-4-8. SOURce[1]:OUTPut:LOAD

Set

Query

Description

Sets or queries the output termination. Two impedance settings can be chosen, DEFault (50Ω) and INFinity (high impedance).

Syntax

SOURce[1]:OUTPut:LOAD{DEF|INF}

Example

SOUR:OUTP:LOAD DEF

Sets the channel 1 output termination to 50Ω.

Query Syntax

SOURce[1]:OUTPut:LOAD?

Return Parameter

DEF

Default

INF

INFinity

Example

SOUR:OUTP:LOAD? >DEF

The output termination for channel 1 is set to 50Ω.

4-3-4-9. SOURce[1]:VOLTage:UNIT

Set

Query

Description

Sets or queries the output amplitude units. There are three types of units: VPP, VRMS and DBM. The SOURce[1]:VOLTage:UNIT command does not set the offset units.

Note

The units set with the VOLTage:UNIT command will be used as the default unit for all amplitude units unless a different

unit is specifically used for a command, such as those used with the APPLy commands.

Syntax

SOURce[1]:VOLTage:UNIT {VPP|VRMS|DBM}

Example

SOUR1:VOLT:UNIT VPP

Sets the amplitude units to Vpp.

Query Syntax

SOURce[1]:VOLTage:UNIT?

Return Parameter VPP

Vpp

VRMS

Vrms

DBM

dBm

Query Example

SOUR1:VOLT:UNIT? >VPP

The amplitude units are set to Vpp.

4-3-5. Amplitude Modulation (AM) Commands

To successfully create an AM waveform, the following commands must be executed in order.

Enable AM

Modulation

Configure

Carrier

Select

Modulation

Source

Select Shape

Set Modulating

Frequency

Set Modulation

Depth

1. Turn on AM modulation using the SOURce[1]:AM:STAT ON command

2. Use the APPLy command to select a carrier waveform. Alternatively the equivalent FUNC, FREQ, AMPL, and DCO commands can be used to create a carrier waveform with a designated frequency, amplitude and offset. Sine, square or ramp can be used as the carrier wave.

3. Select an internal or external modulation source using the SOURce[1]:AM:SOUR command.

4. Use the SOURce[1]:AM:INT:FUNC command to select a Sine, Square or Ramp modulating waveform. For internal sources only.

5. Set the modulating frequency using the SOURce[1]:AM:INT:FREQ command. For internal sources only.

6. Set the modulation depth using the SOURce[1]:AM:DEPT command.

4-3-5-1. SOURce[1]:AM:STATe

Set

Query

Description

Sets or disables AM modulation. By default AM modulation is disabled. AM modulation must be enabled before setting other parameters.

Note

As only one mode is allowed at any one time, other modulation modes (inc. Sweep/FSK) will be disabled when AM modulation is enabled.

Syntax

SOURce[1]:AM:STATe {OFF|ON}

Example

SOUR1:AM:STAT ON

Enables AM modulation.

Query Syntax

SOURce[1]:AM:STATe?

Return Parameter

Disabled (OFF)

Enabled (ON)

Query Example

SOUR1:AM:STAT? >1

AM modulation mode is currently enabled.

4-3-5-2. SOURce[1]:AM:SOURce

Set

Query

Description

Sets or queries the modulation source as internal or external. Internal is the default modulation source.

Note

If an external modulation source is selected, modulation depth is limited to ± 5V from the MOD input port on the rear panel. For example, if modulation depth is set to 100%, then the maximum amplitude is +5V, and the minimum amplitude is -5V.

Syntax

SOURce[1]:AM:SOURce {INTernal|EXTernal}

Example

SOUR1:AM:SOUR EXT

Sets the modulation source to external.

Query Syntax

SOURce[1]:AM:SOURce?

Return Parameter

INT

Internal

EXT

External

Query Example

SOUR1:AM:SOUR? >INT

The modulation source is set to internal.

4-3-5-3. SOURce[1]:AM:INTernal:FUNCtion

Set

Query

Description

Sets the shape of the modulating waveform from sine, square or ramp. The default shape is sine.

Note

Square waveforms have a 50% duty cycle. Ramp waveforms have a symmetry of 100%.

Syntax

SOURce[1]:AM:INTernal:FUNCtion {SINusoid|SQUare| RAMP }

Example

SOUR1:AM:INT:FUNC SIN

Sets the AM modulating wave shape to sine.

Query Syntax

SOURce[1]:AM:INTernal:FUNCtion?

Return Parameter SIN

Sine

SQU

Square

RAMP

Ramp

Query Example

SOUR1:AM:INT:FUNC? >SIN

The shape for the modulating waveform is Sine.

4-3-5-4. SOURce[1]:AM:INTernal:FREQuency

Set

Query

Description

Sets the frequency of the internal modulating waveform only. The default frequency is 100Hz.

Syntax

SOURce[1]:AM:INTernal:FREQuency {<frequency>|MINimum|MAXimum}

Parameter

2 mHz~ 20 kHz

Example

SOUR1:AM:INT:FREQ +1.0000E+02

Sets the modulating frequency to 100Hz.

Query Syntax

SOURce[1]:AM:INTernal:FREQuency? [MINimum|MAXimum]

Return Parameter

<NR3>

Returns the frequency in Hz.

Query Example

SOUR1:AM:INT:FREQ? MIN >+1.0000E+02

Returns the minimum frequency allowed.

4-3-5-5. SOURce[1]:AM:DEPTh

Set

Query

Description

Sets or queries the modulation depth for internal sources only. The default is 100%.

Note

The function generator will not output more than ±5V, regardless of the modulation depth. The modulation depth of an external source is controlled using the ±5V MOD input port on the rear panel, and not the SOURce[1]:AM:DEPTh command.

Syntax

SOURce[1]:AM:DEPTh {<depth in percent> |MINimum|MAXimum}

Parameter

0~120%

Example

SOUR1:AM:DEPT 50

Sets the modulation depth to 50%.

Query Syntax

SOURce[1]:AM:DEPTh? [MINimum|MAXimum]

Return Parameter

<NR3>

Return the modulation depth as a percentage.

Query Example

SOUR1:AM:DEPT? >+1.0000E+02

The modulation depth is 100%.

4-3-6. Frequency Modulation (FM) Commands

The following is an overview of the steps required to generate an FM waveform.

Enable FM Modulation

Configure

Carrier

1. Turn on FM modulation using the SOURce[1]: FM:STAT ON command.

2. Use the APPLy command to select a carrier waveform. Alternatively, the FUNC, FREQ, AMPL, and DCO commands can be used to create a carrier waveform with a designated frequency, amplitude and offset.

Select

Modulation

Source

Select shape

Set Modulating

Frequency

Set Peak

Frequency

Deviation

3. Select an internal or external modulation source using the SOURce[1]:FM:SOUR command.

4. Use the SOURce[1]:FM:INT:FUNC command to select a sine, square or ramp modulating waveform. For internal sources only.

5. Set the modulating frequency using the SOURce[1]: FM:INT:FREQ command. For internal sources only.

6. Use the SOURce[1]:FM:DEV command to set the frequency deviation.

4-3-6-1. SOURce[1]:FM:STATe

Set

Query

Description

Sets or disables FM modulation. By default FM modulation is disabled. FM modulation must be enabled before setting other parameters.

Note

As only one mode is allowed at any one time, other modes (AM, FSK, Sweep etc.) will be disabled when FM modulation is enabled.

Syntax

SOUR[1]:FM:STATe {OFF|ON}

Example

SOUR1:FM:STAT ON

Enables FM modulation.

Query Syntax

SOURce[1]:FM:STATe?

Return Parameter

Disabled (OFF)

Enabled (ON)

Query Example

SOUR1:FM:STAT? >1

FM modulation mode is currently enabled.

4-3-6-2. SOURce[1]:FM:SOURce

Set

Query

Description

Sets or queries the modulation source as internal or external. Internal is the default modulation source.

Note

If an external modulation source is selected, the frequency deviation is limited to ± 5V from the MOD input port on the rear panel. For example, if frequency deviation is set to 100Hz, then +5V will increases the frequency by 100Hz.

Syntax

SOURce[1]:FM:SOURce {INTernal|EXTernal}

Example

SOUR1:FM:SOUR EXT

Sets the modulation source to external.

Query Syntax

SOURce[1]:FM:SOURce?

Return Parameter

INT

Internal

EXT

External

Query Example

SOUR1:FM:SOUR? >INT

The modulation source is set to internal.

4-3-6-3. SOURce[1]:FM:INTernal:FUNCtion

Set

Query

Description

Sets the shape of the modulating waveform from sine, square or ramp. The default shape is sine.

Note

Square waveforms have a 50% duty cycle. Ramp waveforms have a symmetry of 100%.

Syntax

SOURce[1]:FM:INTernal:FUNCtion {SINusoid|SQUare|RAMP }

Example

SOUR1:FM:INT:FUNC SIN

Sets the FM modulating wave shape to sine.

Query Syntax

SOURce[1]:FM:INTernal:FUNCtion?

Return Parameter SIN

Sine

SQU

Square

RAMP

Ramp

Query Example

SOUR1:FM:INT:FUNC? >SIN

The shape for the modulating waveform is Sine.

4-3-6-4. SOURce[1]:FM:INTernal:FREQuency

Set

Query

Description

Sets the frequency of the internal modulating waveform only. The default frequency is 10Hz.

Syntax

SOURce[1]:FM:INTernal:FREQuency {<frequency>|MINimum|MAXimum}

Parameter

2 mHz ~ 20 kHz

Example

SOUR1:FM:INT:FREQ +1.0000E+02

Sets the modulating frequency to 100Hz.

Query Syntax

SOURce[1]:FM:INTernal:FREQuency? [MINimum|MAXimum]

Return Parameter

<NR3>

Returns the frequency in Hz.

Query Example

SOUR1:FM:INT:FREQ? MAX >+2.0000E+04

Returns the maximum frequency allowed.

4-3-6-5. SOURce[1]:FM:DEViation

Set

Query

Description

Sets or queries the peak frequency deviation of the modulating waveform from the carrier waveform. The default peak deviation is 100Hz. The frequency deviation of external sources is controlled using the ±5V MOD INPUT terminal on the rear panel. A positive signal (>0~+5V) will increase the deviation (up to the set frequency deviation), whilst a negative voltage will reduce the deviation.

Note

The relationship of peak deviation to modulating frequency and carrier frequency is shown below. Peak deviation = modulating frequency – carrier frequency. The carrier frequency must be greater than or equal to the peak deviation frequency. The sum of the deviation and carrier frequency must not exceed the maximum frequency for a specific carrier shape + 1kHz. If an out of range deviation is set for any of the above conditions, the deviation will be automatically adjusted to the maximum value allowed and an “out of range” error will be generated. For square wave carrier waveforms, the deviation may cause the duty cycle frequency boundary to be exceeded. In these conditions the duty cycle will be adjusted to the maximum allowed and a “-221” error will be generated.

Syntax

SOURce[1]:FM:DEViation {<peak deviation in Hz> |MINimum|MAXimum}

Parameter <peak deviation in Hz>

DC ~ 12MHz DC~1MHz (Ramp)

Example

SOUR1:FM:DEV MAX

Sets the frequency deviation to the maximum value allowed.

Query Syntax

SOURce[1]:FM:DEViation? [MINimum|MAXimum]

Return Parameter

<NR3>

Returns the frequency deviation in Hz.

Query Example

SOURce1:FM:DEViation? MAX >+1.0000E+06

The maximum frequency deviation for the current function is 1MHz.

4-3-7. Frequency-Shift Keying (FSK) Commands

The following is an overview of the steps required to generate an FSK modulated waveform.

Enable FSK

Modulation

Configure

Carrier

Select FSK

Source

1. Turn on FSK modulation using the SOURce[1]: FSK:STAT ON command.

3. Select an internal or external modulation source using the SOURce[1]:FSK:SOUR command.

Select FSK

HOP Frequency

Set FSK Rate

4. Set the hop frequency using the SOURce[1]:FSK:FREQ command.

5. Use the SOURce[1]: FSK:INT:RATE command to set the FSK rate. The FSK rate can only be set for internal sources.

4-3-7-1. SOURce[1]:FSKey:STATe

Set

Query

Description

Turns FSK Modulation on or off. By default FSK modulation is off.

Note

As only one mode is allowed at any one time, other modes (AM, FM, Sweep etc.) will be disabled when FSK modulation is enabled.

Syntax

SOURce[1]:FSKey:STATe {OFF|ON}

Example

SOUR1:FSK:STAT ON

Enables FSK modulation.

Query Syntax

SOURce[1]:FSKey:STATe?

Return Parameter

Disabled (OFF)

Enabled (ON)

Query Example

SOUR1:FSK:STAT? >1

FSK modulation is currently enabled.

4-3-7-2. SOURce[1]:FSKey:SOURce

Set

Query

Description

Sets or queries the FSK source as internal or external. Internal is the default source.

Note

If an external FSK source is selected, FSK rate is controlled by the Trigger input port on the rear panel.

Syntax

SOURce[1]:FSKey:SOURce {INTernal|EXTernal}

Example

SOUR1:FSK:SOUR EXT

Sets the FSK source to external.

Query Syntax

SOURce[1]:FSKey:SOURce?

Return Parameter

INT

Internal

EXT

External

Query Example

SOUR1:FSK:SOUR? >INT

The FSK source is set to internal.

4-3-7-3. SOURce[1]:FSKey:FREQuency

Set

Query

Description

Sets the FSK hop frequency. The default hop frequency is set to 100Hz.

Note

For FSK, the modulating waveform is a square wave with a duty cycle of 50%.

Syntax

SOURce[1]:FSKey:FREQuency {<frequency>|MINimum|MAXimum}

Parameter <frequency>

0.1Hz~ 12MHz*

0.1Hz~ 1MHz (Ramp)

* FGX-2005 limited to 5MHz.

Example

SOUR1:FSK:FREQ +1.0000E+02

Sets the FSK hop frequency to 100Hz.

Query Syntax

SOURce[1]:FSKey:FREQuency? [MINimum|MAXimum]

Return Parameter

<NR3>

Returns the frequency in Hz.

Query Example

SOUR1:FSK:FREQ? MAX >+2.0000E+07

Returns the maximum hop frequency allowed.

4-3-7-4. SOURce[1]:FSKey:INTernal:RATE

Set

Query

Description

Sets or queries the FSK rate for internal sources only.

Note

External sources will ignore this command.

Syntax

SOURce[1]:FSKey:INTernal:RATE {<rate in Hz> |MINimum|MAXimum}

Parameter

2 mHz~100 kHz

Example

SOUR1:FSK:INT:RATE MAX

Sets the rate to the maximum (100kHz).

Query Syntax

SOURce[1]:FSKey:INTernal:RATE? [MINimum|MAXimum]

Return Parameter

<NR3>

Returns the FSK rate in Hz.

Query example

SOUR1:FSK:INT:RATE? >+1.0000E+05

Returns the FSK rate (100kHz).

4-3-8. Frequency Sweep Commands

Below shows the order in which commands must be executed to perform a sweep.

Enable Sweep

Mode

Select waveform

shape,

amplitude and

offset

Select Sweep

Boundaries

Select Sweep

Mode

Select Sweep

Time

Select the

sweep trigger

source

1. Turn on Sweep mode using the SOURce[1]: SWE:STAT ON command.

2. Use the APPLy command to select the waveform shape. Alternatively, the FUNC, FREQ, AMPL, and DCO commands can be used to create a waveform (sine, square, ramp) with a designated frequency, amplitude and offset.

3. Set the frequency boundaries by setting the start and stop frequencies.

Start~Stop

Use the SOURce[1]:FREQ:STAR and SOURce[1]:FREQ:STOP to set the start and stop frequencies. To sweep up, set the stop frequency higher than the start frequency. To sweep down, set the start frequency higher than the stop frequency.

4. Choose Linear or Logarithmic spacing using the SOURce[1]:SWE:SPAC command.

5. Choose the sweep time (rate) using the SOURce[1]:SWE:RATE command.

6. Select an internal or external sweep trigger source using the SOURce[1]:SOUR command.

4-3-8-1. SOURce[1]:SWEep:STATe

Set

Query

Description

Sets or disables Sweep mode. By default sweep is disabled. Sweep must be enabled before setting other parameters.

Note

Any modes will be disabled if sweep mode is enabled. Syntax

SOURce[1]:SWEep:STATe {OFF|ON}

Example

SOUR1:SWE:STAT ON

Enables sweep mode.

Query Syntax

SOURce[1]:SWEep:STATe?

Return Parameter

Disabled (OFF)

Enabled (ON)

Query Example

SOUR1:SWE:STAT? >1

Sweep mode is currently enabled.

4-3-8-2. SOURce[1]:FREQuency:STARt

Set

Query

Description

Sets the start frequency of the sweep. 100Hz is the default start frequency.

Note

To sweep up set the stop frequency higher than the start frequency. Set the stop frequency lower than the start frequency to sweep down.

Syntax

SOURce[1]:FREQuency:STARt {<frequency>|MINimum|MAXimum}

Parameter <frequency>

0.1Hz ~ 12MHz

0.1Hz ~ 1MHz (Ramp)

Example

SOUR1:FREQ:STAR +2.0000E+03

Sets the start frequency to 2kHz.

Query Syntax

SOURce[1]:FREQuency:STARt? [MINimum| MAXimum]

Return Parameter

<NR3>

Returns the start frequency in Hz.

Query Example

SOUR1:FREQ:STAR? MAX >+2.0000E+07

Returns the maximum start frequency allowed.

4-3-8-3. SOURce[1]:FREQuency:STOP

Set

Query

Description

Sets the stop frequency of the sweep. 1 kHz is the default start frequency.

Note

To sweep up set the stop frequency higher than the start frequency. Set the stop frequency lower than the start frequency to sweep down.

Syntax

SOURce[1]:FREQuency:STOP {<frequency>|MINimum|MAXimum}

Parameter

0.1Hz ~ 12MHz

0.1Hz ~ 1MHz (Ramp)

Query Example

SOUR1:FREQ:STOP +2.0000E+03

Sets the stop frequency to 2kHz.

Query Syntax

SOURce[1]:FREQuency:STOP? [MINimum| MAXimum]

Return Parameter

<NR3>

Returns the stop frequency in Hz.

Example

SOUR1:FREQ:STOP? MAX >+2.0000E+07

Returns the maximum stop frequency allowed.

4-3-8-4. SOURce[1]:SWEep:SPACing

Set

Query

Description

Sets linear or logarithmic sweep spacing. The default spacing is linear.

Syntax

SOURce[1]:SWEep:SPACing {LINear|LOGarithmic}

Example

SOUR1:SWE:SPAC LIN

Sets the spacing to linear.

Query Syntax

SOURce[1]:SWEep:SPACing?

Return Parameter

LIN

Linear spacing

LOG

Logarithmic spacing

Query Example

SOUR1:SWE:SPAC? >LIN

The spacing is currently set as linear.

4-3-8-5. SOURce[1]:SWEep:RATE

Set

Query

Description

Sets or queries the sweep rate. The default sweep rate is 100 Hz. This command is the equivalent to using the Rate function on the front panel.

Note

The function generator automatically determines the number of frequency points that are used for the sweep based on the sweep rate.

Syntax

SOURce[1]:SWEep:RATE {<Hz>|MINimum|MAXimum}

Parameter

<Hz>

2mHz ~1kHz (equivalent to a sweep time of 500s ~ 1ms)

Example

SOUR1:SWE:RATE +1.0000E+00

Sets the rate to 1 Hz (1 second).

Query Syntax

SOURce[1]:SWEep:RATE? {<Hz>| MINimum|MAXimum}

Return Parameter

<NR3>

Returns sweep rate in Hz.

Query Example

SOUR1:SWE:RATE? >+2.0000000E+01

Returns the sweep rate (20 Hz).

4-3-8-6. SOURce[1]:SWEep:SOURce

Set

Query

Description

Sets or queries the trigger source as immediate (internal) or external. Immediate (internal) is the default trigger source. IMMediate will constantly output a swept waveform. EXTernal will output a swept waveform after each external trigger pulse (TTL positive edge).

Note

If EXTernal is selected, the trigger period must be greater than the sweep time + 125nS.

Syntax

SOURce[1]: SWEep:SOURce {IMMediate|EXTernal }

Example

SOUR1: SWE:SOUR EXT

Sets the sweep source to external.

Query Syntax

SOURce[1]: SWEep:SOURce?

Return Parameter

IMM

Immediate

EXT

External

Query Example

SOUR1:SWE:SOUR? >IMM

The sweep source is set to immediate.

4-3-9. Frequency Counter Commands

4-3-9-1. COUNter:GATe

Set

Query

Description

Sets or queries the gate time for the frequency counter function.

Note

The counter function is only applicable for the FGX-21XX models.

Syntax

COUNter:GATe <seconds>

Parameter

0.01S, 0.1S, 1S, 10S

Example

COUN:GAT 10S

Sets the gate time to 10 seconds.

Query Syntax

COUNter:GATe?

Return Parameter

<NR3>

Returns the gate time in seconds.

Query Example

COUN:GAT? >1.000E-02

The gate time is current set to 0.01 second.

4-3-9-2. COUNter:STATe

Set

Query

Description

Turns the frequency counter on/off.

Syntax

COUNter:STATe [ON/OFF]

Note

The counter function is only applicable for the FGX2115.

Parameter ON

Turns the counter function on.

OFF

Turns the counter function off.

Example

COUN:STAT ON

Turns the frequency counter on.

Query Syntax

COUNter:STATe?

Return Parameter

Counter function is off.

Counter function is on.

Query Example

COUN:STAT? >1

Counter is on. 4-3-9-3. COUNter:VALue?

Query

Description

Queries the counter frequency.

Note

The counter function is only applicable for the FGX-21XX models.

Syntax

COUNter:VALue?

Return Parameter

<NR3>

Returns the counter frequency.

Example

COUN:VAL?

>1.000E+03

The counter frequency is 1kHz.

4-3-10. Arbitrary Waveform Commands

Use the steps below to output an arbitrary waveform over the remote interface.

Output Arbitrary

Waveform

Select Waveform

Freq, ampl ,offset

Load Waveform

Data

Set Waveform Rate

1. Use the SOURce[1]:FUNCtion USER command to output the arbitrary waveform currently selected in memory.

2. Use the APPLy command to select frequency, amplitude and DC offset. Alternatively, the FUNC, FREQ, AMPL, and DCO commands can be used.

3. Waveform data (4k points per waveform) can be downloaded into volatile memory using the DATA:DAC command. Binary integer or decimal integer values in the range of ± 511 can be used.

4. The waveform rate is the product of the number of points in the waveform and the waveform frequency. Rate = Frequency × # points

Range: Rate:

0.1Hz ~ 20MHz

Frequency:

0.1Hz ~ 10MHz

# points:

2~4096

4-3-10-1. SOURce[1]:FUNCtion USER

Set

Query

Description

Use the SOURce[1]:FUNCtion USER command to output the arbitrary waveform currently selected in memory. The waveform is output with the current frequency, amplitude and offset settings. The query returns the current output.

Syntax

SOURce[1]:FUNCtion USER

Example

SOUR1:FUNC USER

Selects and outputs the current waveform in memory.

Query Syntax

SOURce[1]:FUNCtion?

Return Parameter

SIN

Sine wave

SQU

Square wave

RAMP

Ramp wave

NOIS

Noise wave

ARB

Arbitrary wave

Query Example

SOURce1:FUNCtion? >SQU

A square waveform is the current output. 4-3-10-2. DATA:DAC

Set

Description

The DATA:DAC command is used to download binary or decimal integer values into memory using the IEEE-488.2 binary block format or as an ordered list of values. After the values have been downloaded into memory the SOURce[1]:FUNCtion USER command can be used to output the ARB waveform in memory.

Note

The integer values (±511) correspond to the maximum and minimum peak amplitudes of the waveform. For instance, for a waveform with an amplitude of 5Vpp (0 offset), the value 511 is the equivalent of 2.5 Volts and -511 is the equivalent of -2.5V. If the integer values do not span the full output range, the peak amplitude will be limited. The IEEE-488.2 binary block format is comprised of three parts:

#216

ab c

a. Initialization character (#)

b. Digit length (in ASCII) of the number of

bytes

c. Number of bytes

IEEE 488.2 binary block format uses two bytes to

represent waveform data (16 bit integer). Therefore the number of bytes is always twice the number of data points. In the example above, the data block represents 8 data points.

Syntax

DATA:DAC VOLATILE, 0，{<binary block>|<value>, <value>, . . . }

Parameter

Points 2~4096 in binary block format

<value>

Decimal or integer values ±511

Example1

DATA:DAC VOLATILE, 0, #216 Binary Data

The command above downloads 8 integer points stored in 16 bytes to memory using the binary block format.

Example2

DATA:DAC VOLATILE, 0, 511, 206, 0, -206, -511,

-206, 0, 206

The command above downloads the data values (511, 206, 0, -206, -511, -206, 0, 206) to memory using the ordered list method.

4-3-11. Save and Recall Commands

Up to 10 different instrument states can be stored to non-volatile memory (# 0~9) and up to 10 different ARB waveforms can be saved to memory locations 10~19.

4-3-11-1. *SAV

Set

Description

Saves the current instrument state to a specified save location or an ARB waveform to the specified location. When a state is saved, all the current instrument settings, functions, modulation parameters and waveforms are also saved. Memory locations 0~9, save the instrument state only, whilst memory locations 10~19 save ARB data.

Note

The *RST command will not delete saved instrument states from memory.

Syntax

*SAV {NR1}

Parameter

0~9

Save state

10~19

Save ARB data

Example

*SAV 0

Save the instrument state to memory location 0.

4-3-11-2. *RCL

Set

Description

Recall previously saved instrument states from memory locations 0~9 or recall the previously saved ARB waveforms from memory locations 10~19.

Syntax

*RCL {NR1}

Parameter

0~9

Recall state

10~19

Recall ARB data

Example

*RCL 0

Recall the instrument state from memory location 0 (assuming location 0 has been previously saved).

5. APPENDIX

5-1. Error Messages

The FGX-2000 has a number of specific error codes. If a setting error occurs whilst using the function generator, an error message will be momentarily displayed on the screen.

Error code

Description

E01

Frequency forced duty cycle change.

E02

Frequency reduced for ramp function

E03

Frequency made compatible with FM

E04

Frequency made compatible with FSK

E05

Frequency made compatible with Sweep

E06

Mod function cannot be performed under current setting

E07

Frequency over range

E08

Frequency over resolution

E09

Amplitude over range

E10

Amplitude over resolution

E11

Offset over range

E12

Offset over resolution

E13

Duty over range

E14

Duty over resolution

E15

ARB frequency over range

E16

ARB frequency over resolution

E17

ARB rate over range

E18

ARB rate over resolution

E19

ARB point over range

E20

ARB point over resolution

E21

ARB value over range

E22

ARB value over resolution

E23

Mod rate over range

E24

Mod rate over resolution

E25

Mod sym over range

E26

Mod sym over resolution

E27

AM depth over range

E28

AM depth over resolution

E29

FM deviation over range

E30

FM deviation over resolution

E31

FSK hop frequency over range

E32

FSK hop frequency over resolution

E33

Sweep frequency over range

E34

Sweep frequency over resolution

E35

Sweep rate over range

E36

Sweep rate over resolution

E37

Save setting over setting number range

E38

Recall setting over setting number range

E39

Recall set has no data

E40

Value over resolution

E41

Queue overflow

5-2. FGX-2000 Series Specifications

The specifications apply when the function generator is powered on for at least 30 minutes under +20°C~+30°C.

Unless otherwise specified, the specifications to apply the 50Ω load.

models

FGX-2005

FGX-2112

Waveforms

Sine, Square, Ramp, Noise, ARB

Arbitrary Functions

Sample Rate

20 MSa/s

Repetition Rate

10MHz

Waveform Length

4k points

Amplitude Resolution

10 bits

Non-Volatile Memory

4k points

Frequency Characteristics

Range

Sine

0.1Hz~5MHz

0.1Hz~12MHz

Square

0.1Hz~5MHz

0.1Hz~12MHz

Triangle, Ramp

1MHz

Resolution

0.1Hz

Accuracy

Stability

±20 ppm

Aging

±1 ppm, per 1 year

Tolerance

≤ 1 mHz

Output Characteristics

Amplitude

Range

1 mVpp to 10 Vpp (into 50Ω)

2 mVpp to 20 Vpp (open-circuit)

Accuracy

± 2% of setting ±1 mVpp

(at 1 kHz,Sin Wave)

Resolution

1 mV or 3 digits

Flatness

± 1% (0.1dB) ≤100kHz

± 3% (0.3 dB) ≤5MHz

± 5% (0.4 dB) ≤12MHz

(sine wave relative to 1 kHz)

Units

Vpp, Vrms, dBm

Offset

Range

±5 Vpk ac +dc (into 50Ω)

±10Vpk ac +dc (Open circuit)

Accuracy

2% of setting + 5 mV+ 0.5% of amplitude

Waveform Output

Impedance

50Ω typical (fixed)

> 300kΩ (output disabled)

Attenuator

—

Protection

Short-circuit protected

Overload relay automatically disables main

output

SYNC Output

Level

TTL-compatible into >1kΩ

Impedance

50Ω nominal

Fan Out

—

Rise of Fall Time

≤ 25ns

Sine wave Characteristics

Harmonic distortion

–55 dBc –50 dBc –35 dBc –30 dBc

DC ~ 200kHz, 200kHz ~ 1MHz, 1MHz ~ 5MHz, 5MHz ~ 12MHz,

Ampl > 0.1Vpp Ampl > 0.1Vpp Ampl > 0.1Vpp Ampl > 0.1Vpp

Square wave Characteristics

Rise/Fall Time

≤25ns at maximum output.(into 50 Ω load)

Overshoot

< 5%

Asymmetry (@50% Duty)

1% of period +1 ns

Variable duty Cycle

1.0% to 99.0% ≤100kHz

20.0% to 80.0% ≤ 5MHz

40.0% to 60.0% ≤ 10MHz 50% ≤ 12MHz

Ramp Characteristics

Linearity

< 0.1% of peak output

Variable Symmetry

0% to 100% (0.1% Resolution)

AM Modulation

Carrier Waveforms

—

Sine, Square, Ramp

Modulating Waveforms

—

Sine, Square, Ramp

Modulating Frequency

—

2mHz to 20kHz (Int)

DC to 20kHz (Ext)

Depth — 0% to 120.0%

Source — Internal / External

FM Modulation

Carrier Waveforms

—

Sine, Square, Ramp

Modulating Waveforms

—

Sine, Square, Ramp

Modulating Frequency

—

2mHz to 20kHz (Int)

DC to 20kHz (Ext)

Peak Deviation

—

DC to Max Frequency

Source — Internal / External

Sweep

Waveforms

—

Sine, Square, Ramp

Type — Linear or Logarithmic

Start/Stop Freq

—

0.1Hz to Max Frequency

Sweep Time

—

1ms to 500s

Source — Internal / External

FSK

Carrier Waveforms

—

Sine, Square, Ramp

Modulating Waveforms

—

50% duty cycle square

Modulation Rate

—

2mHz to 100 kHz (INT)

DC to 100 kHz(EXT)

Frequency Range

—

0.1Hz to Max Frequency

Source — Internal / External

Frequency Counter

Range — 5Hz to 150MHz

Accuracy — Time Base

accuracy±1count

Time Base

—

±20ppm (23˚C ±5˚C)

after 30 minutes warm up

Resolution

—

The maximum resolution is:

100nHz for 1Hz,

0.1Hz for 100MHz.

Input Impedance

—

1kΩ/1pf

Sensitivity

—

35mVrms ~ 30Vms

(5Hz to 150MHz)

Save/ Recall

10 Groups of Setting Memories

(Locations 0~9 only for instrument state,

Locations 10~19 only for ARB data)

Interface

USB (CDC Device)

Display

LCD

General Specifications

Power Source

AC100~240V, 50~60Hz

Power Consumption

25 VA (Max)

Operating Environment

Temperature to satisfy the specification :

18 ~ 28˚C

Operating temperature :0 ~ 40˚C

Relative Humidity:

≤ 80%, 0 ~ 40˚C

≤ 70%, 35 ~ 40˚C

Installation category： CAT Ⅱ

Operating Altitude

2000 Meters

Storage Temperature

-10~70˚C, Humidity: ≤80%

Dimensions (WxHxD)

266(W) x 107(H) x 293(D) mm

Weight

Approx. 2.5kg

Accessories

GTL-101× 1

GTL-101× 2

CD (user manual + software) ×1 Power cord×1

5-3. External Dimensions Figure

7F Towa Fudosan Shin Yokohama Bldg., 2-18-13, Shin Yokohama, Kohoku-ku, Yokohama, Kanagawa, 222-0033, Japan.

http://www.texio.co.jp/

TEXIO FGX-2005, FGX-2112 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual