User Manual
SDG6000X Series
Pulse/Arbitrary Waveform Generator
UM0206X-E01A
2017 SIGLENT TECHNOLOGIES CO., LTD
Declaration
Copyright © SIGLENT TECHNOLOGIES CO., LTD. All rights reserved.
Without permission, contents in this manual are not allowed to be copied,
extracted or translated.
SDG6000X User Manual I
General Safety Summary
Carefully read the following safety precautions to avoid any personal injury or
damage to the instrument and any product connected to it. To avoid potential
hazards, please use the instrument as specified.
Only qualified technical personnel should service this instrument.
Avoid fire or open flame.
Use properly rated power line connections.
Use only the specified power line which has been approved by your local
regulatory agency.
Ground the Instrument.
The instrument is grounded through the protective ground conductor of the
power line. To avoid electric shock, the ground conductor must be connected
to the earth ground. Make sure the instrument is grounded correctly before
connecting its input or output terminals.
Connect the signal wire correctly.
The potential of the signal wire ground is equal-to the earth, therefore do not
connect the signal wire to a high voltage. Do not touch the exposed contacts
or components.
Observe all terminal ratings.
To avoid fire or electric shock, please observe all ratings and sign instructions
on the instrument. Before connecting the instrument, please read the manual
carefully to gain more information about the ratings.
Do not operate with suspected failures.
If you suspect that the product is damaged, please let only qualified service
personnel check it.
Avoid circuit or wire exposure.
Do not touch exposed contacts or components when the power is on.
Do not operate in wet/damp conditions.
Do not operate in an explosive atmosphere.
Keep the surface of the instrument clean and dry.
II SDG6000X User Manual
Safety Terms and Symbols
Terms used in this manual:
DANGER: Indicates an injury or hazard that may immediately happen.
WARNING: Indicates an injury or hazard that may not immediately happen.
CAUTION: Indicates that a potential damage to the instrument or other
property might occur.
Symbols used on the instrument. Symbols may appear on the instrument:
Hazardous Protective Warning Chassis Power
Voltage Earth Ground Ground Switch
SDG6000X User Manual III
Introduction
The manual covers the following 3 models of SDG6000X Series
Pulse/Arbitrary Waveform Generators: SDG6022X, SDG6032X and
SDG6052X.
SIGLENT‟s SDG6000X is a series of dual-channel Pulse/Arbitrary Waveform
Generators that feature up to 500 MHz maximum bandwidth, a maximum
sample rate of 2.4 GSa/s and 16-bit vertical resolution. They also include
proprietary TrueArb & EasyPulse technology that help to solve the
weaknesses inherent in traditional DDS generators when generating arbitrary,
square and pulse waveforms. In addition, the SDG6000X is a multi-function
device which can generate Noise, IQ signals and PRBS patterns. These
features enable the SDG6000X to provide a variety of high fidelity and low
jitter signals, meeting the growing requirements of complex waveform
synthesis.
IV SDG6000X User Manual
Key Features
Continuous Wave
Generator
Up to 500 MHz sine wave, supporting sweep and
user-defined harmonics.
Low cost replacement of RF signal generators
below 500 MHz.
Pulse Generator
Up to 150 MHz Pulse, with adjustable width, rising
edge and falling edge; 3.3 ns minimum width and
1 ns minimum edge across the full frequency
range
Function/Arbitrary
Waveform
Generator
Basic Function/Arbitrary Waveform Generator with
modulation, sweep, burst and waveform
combination functions.
IQ Signal Generator
(optional)
Base Band and IF IQ signal generation with
symbol rates between 250 Symb/s ~ 37.5
MSymb/s
Noise Generator
Up to 500 MHz bandwidth White Gaussian Noise
with adjustable bandwidth
PRBS Generator
Up to 300 Mbps PRBS3 ~ PRBS32 with bit rate
and edge adjustments
Dual-Channel, 500 MHz maximum bandwidth, 20 Vpp maximum output
amplitude, high fidelity output with 80dB dynamic range
High-performance sampling system with 2.4 GSa/s maximum sampling
rate and 16-bit vertical resolution.
Multi-function signal generator that delivers:
Sweep and Burst function
Harmonic function
Waveforms Combining function
Channel Coupling, Copy and Tracking function
High precision Frequency Counter
196 kinds of built-in arbitrary waveforms
Standard interfaces: USB Host, USB Device (USBTMC), LAN (VXI-11,
Socket, Telnet). Optional interface: GPIB
4.3” touch screen display for easier operation
SDG6000X User Manual V
Content
Declaration ....................................................................................................... I
General Safety Summary ................................................................................ II
Introduction ................................................................................................... IV
1 Quick Start ................................................................................................ 1
1.1 Handle Adjustment ....................................................................... 2
1.2 The Front/Rear Panel ................................ ................................ ... 3
1.2.1 Front Panel ............................................................................. 3
1.2.2 Rear Panel ............................................................................. 4
1.3 Touch Screen Display ................................................................... 5
1.4 System Functions ......................................................................... 8
1.4.1 Waveform Selection ............................................................... 8
1.4.2 To Set the Modulation/Sweep/Burst ..................................... 14
1.4.3 Output Control ...................................................................... 16
1.4.4 Numeric Input ....................................................................... 17
1.4.5 Common Function Keys ....................................................... 19
2 Application and Implementation .............................................................. 20
2.1 To Set the Standard Waveforms ................................................. 21
2.1.1 To Set the Sine Waveform .................................................... 21
2.1.2 To Set the Square Waveform ............................................... 25
2.1.3 To Set the Ramp Waveform ................................................. 27
2.1.4 To Set the Pulse Waveform .................................................. 29
2.1.5 To Set the Noise Waveform .................................................. 33
2.1.6 To Set the DC Waveform ...................................................... 36
2.1.7 To Set the Arbitrary Waveform .............................................. 37
2.1.8 To Set the Pseudo Random Binary Sequence (PRBS) ........ 48
2.2 Harmonic Function ..................................................................... 52
2.3 To Set IQ Waveform (Optional) ................................................... 55
2.3.1 Front Panel IQ Control ......................................................... 55
2.3.2 EasyIQ Software .................................................................. 60
2.4 Modulation Functions ................................................................. 71
2.4.1 AM ........................................................................................ 72
2.4.2 DSB-AM ............................................................................... 75
VI SDG6000X User Manual
2.4.3 FM ........................................................................................ 76
2.4.4 PM ........................................................................................ 78
2.4.5 FSK ...................................................................................... 80
2.4.6 ASK ...................................................................................... 82
2.4.7 PSK ...................................................................................... 83
2.4.8 PWM .................................................................................... 85
2.5 To Set Sweep Function ............................................................... 87
2.6 To Set the Burst Function ........................................................... 92
2.7 To Store and Recall .................................................................... 97
2.7.1 Storage System .................................................................... 98
2.7.2 File Type ............................................................................. 100
2.7.3 File Operation ..................................................................... 101
2.8 To Set Utility Function ............................................................... 105
2.8.1 System Settings ................................................................. 108
2.8.2 Test/Cal .............................................................................. 117
2.8.3 Frequency Counter............................................................. 122
2.8.4 Output ................................................................................ 125
2.8.5 CH Copy/Coupling.............................................................. 128
2.8.6 Remote Interface ................................................................ 133
2.8.7 Sync Output ....................................................................... 139
2.8.8 Clock Source ...................................................................... 141
2.8.9 Phase Mode ....................................................................... 143
2.8.10 Overvoltage Protection................................................. 145
2.8.11 Multi-Device Synchronization ....................................... 146
3 Examples .............................................................................................. 148
3.1 Example 1: Generating a Sine Waveform ................................. 149
3.2 Example 2: Generating a Square Waveform ............................ 151
3.3 Example 3: Generating a Ramp Waveform .............................. 153
3.4 Example 4: Generating a Pulse Waveform ............................... 155
3.5 Example 5: Generating a Noise ................................................ 157
3.6 Example 6: Generating a Pseudo Random Binary Sequence .. 158
3.7 Example 7: Generating a Linear Sweep Waveform .................. 160
3.8 Example 8: Generating a Burst Waveform ............................... 162
3.9 Example 9: Generating an AM Modulation Waveform .............. 164
SDG6000X User Manual VII
3.10 Example 10: Generating an FM Modulation Waveform ............ 166
3.11 Example 11: Generating a PM Modulation Waveform .............. 168
3.12 Example 12: Generating a FSK Modulation Waveform ............ 170
3.13 Example 13: Generating an ASK Modulation Waveform .......... 172
3.14 Example 14: Generating a PSK Modulation Waveform ............ 174
3.15 Example 15: Generating a PWM Modulation Waveform........... 176
3.16 Example 16: Generating a DSB-AM Modulation Waveform ..... 178
3.17 Example 17: Generating a IQ Waveform .................................. 180
4 General Inspecting and Troubleshooting............................................... 183
4.1 General Inspecting ................................................................... 183
4.2 Troubleshooting ................................................................ ........ 184
5 Service and Support ............................................................................. 185
5.1 Maintenance summary ............................................................. 185
5.2 Contact SIGLENT ..................................................................... 186
6 Appendix ............................................................................................... 187
Appendix A: Accessories ...................................................................... 187
Appendix B: Daily Maintenance and Cleaning ..................................... 188
VIII SDG6000X User Manual
1 Quick Start
This chapter covers the following topics:
Handle Adjustment
The Front/Rear Panel
Touch Screen Display
System Functions
SDG6000X User Manual 1
1.1 Handle Adjustment
To adjust the handle position of SDG6000X, please grip the handle by the
sides and pull it outward. Then, rotate to the desired position.
Figure 1-1 Viewing Position and Carrying Position
2 SDG6000X User Manual
1.2 The Front/Rear Panel
USB
Host
Numeric Keyboard
Power
Switch
User Interface
Menu
Softkeys
Function
Keys
Channel
Control
Arrow
Keys
This chapter will provide a brief introduction and description for the operation
and functions of the front/rear panel.
1.2.1 Front Panel
SDG6000X has a clear and simple front panel which includes 4.3 inch touch
screen, menu softkeys, numeric keyboard, knob, function keys, arrow keys,
and channel control area, etc.
Figure 1-2 Front Panel
SDG6000X User Manual 3
10 MHz Clock
Output
10 MHz Clock Input
LAN
Interface
USB
Device
Aux
In/Out
Earth Terminal
AC Power Supply
Input
Counter
1.2.2 Rear Panel
The rear panel provides multiple interfaces, including Counter, 10 MHz In, 10
MHz Out, Aux In/Out, LAN, USB Device, Earth Terminal and AC Power Supply
Input.
4 SDG6000X User Manual
Figure 1-3 Rear Panel
1.3 Touch Screen Display
1 2
4 3 9 8 7 6 5
SDG6000X displays parameter and waveform information of one channel at a
time. The picture below shows the interface when CH1 is selected. In this
example, the waveform is an AM modulated sine wave. The information
displayed may vary depending on the function selected.
The entire screen of the SDG6000X is a touch screen. You can use your finger
or a touch pen to control the instrument. Most functions and selections can be
chosen using the touch screen in a similar manner to the front panel keys and
knob.
Figure 1-4 Touch Screen Display
1. Waveform Display Area
Displays the currently selected waveform of each channel. Click on the screen
here, then the "Waveforms" button will be highlighted.
2. Channel Status Bar
Indicates the selected status and output configuration of the channels. Click
on the screen here to switch to the corresponding channel. Click here again,
SDG6000X User Manual 5
shortcut menu of front panel's function keys will be shown: Mod, Sweep, Burst,
Parameter, Utility and Store/Recall.
3. Basic Waveform Parameters Area
Shows the current waveform parameters of each channel. Click the
parameters to be set, and the parameters will be selected and highlighted.
Then use number keys or knob to change the parameter value.
4. Channel Parameters Area
Displays the load and output settings of the currently selected channel.
Load ----Value of the output load, as selected by the user.
Select the corresponding parameter to highlight it, and then use the softkeys,
number keys or knob to change the parameter value; or press the
corresponding output key for two seconds to switch between High Impedance
and 50Ω.
High Impedance: Displays HiZ, and assumes a load impedance of 1 MΩ.
Load: Displays the set impedance value. The default is 50Ω and the range is
from 50Ω to 100kΩ.
Note: This setting does not actually change the instrument‟s output
impedance of 50Ω but rather is used to maintain amplitude accuracy into
different load values.
Output ----Channel output state.
Click on the screen here or pressing corresponding channel output control
button, the current channel can be turned on/off.
5. LAN Status Icon
SDG6000X will show different prompt messages based on the current network
status.
6 SDG6000X User Manual
This mark indicates LAN connection is successful.
This mark indicates there is no LAN connection or LAN connection is
unsuccessful.
6. Mode Icon
The display will show different prompt messages based on the current phase
mode.
This mark indicates current phase mode is Phase-locked.
This mark indicates current phase mode is Independent.
7. Clock Source Icon
The display will show different prompt messages based on the current clock
source.
This mark indicates the current clock source is from the internal TCXO.
This mark indicates the current clock source is from an external clock
source.
8. Menu
Shows the menu corresponding to the selected function. For example, Figure
1-4 Touch Screen Display shows the parameters of “AM modulation”. Click
menu options on the screen to select and set the corresponding parameters.
9. Modulation Parameters Area
Shows the parameters of the current modulation function. Click on the screen
here or select the corresponding menu, and use number keys or knob to
change the parameter value.
SDG6000X User Manual 7
1.4 System Functions
In this section, you will learn the main function settings of the SDG6000X,
including waveform selection settings, modulation/sweep/burst settings,
channel output control, numeric input control and common function keys.
1.4.1 Waveform Selection
Press Waveforms to enter the menu as Figure 1-5 shows. The example below
will help to familiarize with the waveform selection settings.
Figure 1-5 Waveform Selections
Press Waveforms →Sine, and the channel status bar displays "Sine". The
SDG6000X can generate sine waveforms with frequencies from 1 μHz to 500
MHz. By setting Frequency/Period, Amplitude/High level, Offset/Low level and
Phase, a sine signal with different parameters can be generated.
Figure 1-6 Sine Display Interface
Press Waveforms →Square, and channel status bar displays "Square". The
8 SDG6000X User Manual
generator can generate square waveforms with frequencies from 1 μHz to 120
MHz and a variable duty cycle. By setting Frequency/Period, Amplitude/High
level, Offset/Low level, Phase and Duty Cycle, a square waveform with
different parameters can be generated.
Figure 1-7 Square Display Interface
Press Waveforms →Ramp, and channel status bar displays "Ramp". The
generator can generate ramp waveforms with frequencies from 1 μHz to 5
MHz with variable symmetry. By setting Frequency/Period, Amplitude/High
level, Offset/Low level, Phase and Symmetry, a ramp waveform with different
parameters can be generated.
SDG6000X User Manual 9
Figure 1-8 Ramp Display Interface
Press Waveforms →Pulse, and channel status bar displays "Pulse". The
generator can generate pulse waveforms with frequencies from 1 μHz to 150
MHz with variable pulse width and rise/fall times. By setting Frequency/Period,
Amplitude/High level, Offset/Low level, PulWidth/Duty, Rise/Fall and Delay, a
pulse waveform with different parameters can be generated.
Figure 1-9 Pulse Display Interface
Press Waveforms →Noise, and channel status bar displays "Noise". The
generator can generate noise with a bandwidth from 80 MHz to 500 MHz. By
setting Stdev and Mean, noise with different parameters can be generated.
10 SDG6000X User Manual
Figure 1-10 Noise Display Interface
Press Waveforms →Page 1/2→DC, and channel status bar displays "DC".
The generator can generate a DC signal with a level up to ±10 V into a HighZ
load or ±5 V into a 50 Ω load.
Figure 1-11 DC Display Interface
Press Waveforms →Page 1/2→Arb, and channel status bar displays "Arb".
The generator can generate repeatable arbitrary waveforms with frequencies
from 1 μHz to 50 MHz in DDS mode or output every data point with an output
sample rate from 1 μSa/s to 300 MSa/s in TrueArb mode. By setting
SDG6000X User Manual 11
Frequency/Period, Amplitude/High level, Offset/Low level, Phase and
Interpolation, an arbitrary signal with different parameters can be generated.
Figure 1-12 Arbitrary Waveform Display Interface
Press Waveforms →Page 1/2→I/Q, then CH1 and CH2 output orthogonal I
and Q signals respectively and channel status bar displays " In -phase" and "
Quadrature" separately. The generator can generate I/Q signals with
symbol rate from 250 Symb/s to 37.5 MSymb/s. By setting Center Frequency,
Fsymb/Fs, Amplitude and Trigger Source, an I/Q signal pair with different
parameters can be generated.
Figure 1-13 I/Q Signal Display Interface
12 SDG6000X User Manual
Press Waveforms →Page 1/2→PRBS, and channel status bar displays
"PRBS". The generator can generate a Pseudo-Random Bit Sequence (PRBS)
with bit rates ranging from 1 μbps to 300 Mbps. By setting BitRate/Period,
Amplitude/High level, Offset/Low level, Length, Logic Level and Rise/Fall, A
PRBS with different parameters can be generated.
Figure 1-14 PRBS Display Interface
SDG6000X User Manual 13
1.4.2 To Set the Modulation/Sweep/Burst
As shown in Figure 1-15, there are three keys on the front panel which select
modulation, sweep and burst settings. The instructions below will help to
explain these functions.
Figure 1-15 Modulate/Sweep/Burst Key
1. Press Mod, the Modulation function will be enabled.
The modulated waveform can be changed by modifying the parameters such
as Type, Source, AM Depth, AM Freq, and Shape. The SDG6000X can
modulate waveforms using AM, FM, PM, ASK, FSK, PSK, PWM and DSB-AM
modulation types. Pulse waveforms can only be modulated using PWM. Noise
and DC waveforms cannot be modulated.
Figure 1-16 Modulation Display Interface
2. Press Sweep, the Sweep function will be enabled.
Sine, square, ramp and arbitrary waveforms support the sweep function. In
sweep mode, the SDG6000X can generate signals with variable frequency.
The available range of sweep time is from 1 ms to 500 s. The trigger source
can be “Internal”, “External” or “Manual”.
14 SDG6000X User Manual
Figure 1-17 Sweep Waveform Display Interface
3. Press Burst, the Burst function will be enabled.
Burst function is supported for Sine, Square, Ramp, Pulse or Arbitrary
waveforms. Start Phase ranges from 0° to 360° and the Burst Period ranges
from 1 μs to 1000 s.
Figure 1-18 Burst Waveform Display Interface
SDG6000X User Manual 15
1.4.3 Output Control
As shown in Figure 1-19, there are two keys on the right side of the front panel
which are used to enable / disable the output of the two channels. Choose a
channel and press the corresponding Output key, the key backlight will light
and the output will be enabled. Press the Output key again, the key light will
go out and the output will be disabled.
Note: Keep pressing the corresponding output key for two seconds to quickly
switch the load between High Impedance and 50 Ω.
Figure 1-19 Output Keys
16 SDG6000X User Manual
1.4.4 Numeric Input
As shown in Figure 1-20, there are three sets of keys on the front panel, which
are arrow keys, knob and numeric keyboard. The instructions below will help
to familiarize you with the numerical keypad.
Figure 1-20 Front Panel Digital Input
1. The numeric keyboard is used to enter a parameter.
2. The knob is used to increase (clockwise) or decrease (counterclockwise)
the current digit when setting parameters.
3. When using the knob to set parameters, the arrow keys are used to select
the digit placeholder to be modified. When using the numeric keyboard to
set parameters, the left arrow key is used as a Backspace function.
Key point:
The numeric keyboard can be used to set waveform parameters. The
following examples show how to change the frequency of Sine waveform:
After the desired parameter has been selected, Use the numeric keyboard to
input the parameter value directly, and press the corresponding key to select
the parameter unit. Or use the arrow keys to select the digit to edit, and then
use the knob to change its value.
SDG6000X User Manual 17
Figure 1-21 Use numeric keyboard to set the parameters
When using the numeric keyboard to enter the value, the left arrow key can be
used to move the cursor backward and delete the value of the previous digit.
18 SDG6000X User Manual
1.4.5 Common Function Keys
As shown in Figure 1-22, there are five keys on the operation panel, which are
labeled Parameter, Utility, Store/Recall, Waveforms, and Ch1/Ch2. The
instructions below will help to familiarize you with these functions.
Figure 1-22 Common Function Keys
1. The Parameter key makes it convenient to directly set the parameters
(frequency, amplitude, etc.) of basic waveforms.
2. The Utility key is used to set the auxiliary system functions, such as output
configurations, interface setting, system setting information, performing
the instrument self-test, version etc.
3. The Store/Recall key is used to store and recall waveform data and
configuration information.
4. The Waveforms key is used to select basic waveforms.
5. The Ch1/Ch2 key is used to switch the currently selected channel
between CH1 and CH2. After start-up, CH1 is selected as default. At this
point, press the key again to select CH2.
SDG6000X User Manual 19
2 Application and Implementation
Up to now, you have got a brief understanding about SDG6000X with the
front/rear panel, the function control areas, and keys. You should also know
how to set your Pulse/Arbitrary Waveform Generator for your usage. If you are
not familiar with these operations, you are suggested to read chapter one
„Quick Start‟ again.
This chapter covers the following topics:
To Set the Standard Waveforms
Harmonic Function
To Set IQ Waveform
Modulation Function
To Set Sweep Function
To Set the Burst Function
To Store and Recall
To Set Utility Function
20 SDG6000X User Manual
2.1 To Set the Standard Waveforms
Function
Menu
Explanation
Frequency/
Period
Set the signal frequency or period
Amplitude/
HighLevel
Set the signal amplitude or high level
Offset/
LowLevel
Set the signal offset or low level
Phase
Set the phase of the signal
The SDG6000X can output 8 standard waveforms; including sine, square,
ramp, pulse, noise, DC, arbitrary and PRBS. In this section, you will learn how
to set the parameters of each waveform.
2.1.1 To Set the Sine Waveform
Press Waveforms key to select the waveform function and then press the Sine
softkey. The sine waveform parameters are set by using the sine operation
menu, as shown in Figure 2-1. The parameters available for sine waveform
include frequency/period, amplitude/high level, offset/low level and phase.
Different sine signals can be generated by setting these parameters.
Note: To select the secondary menu item, press the key a second time. For
Figure 2-1 Sine Parameters Display Interface
Table 2-1 Menu Explanations of Sine Waveform
SDG6000X User Manual 21
example, if you wish to adjust the period of a waveform, press the softkey
below the “Frequency/Period” menu label until Period is highlighted and then
enter the value.
To Set the Frequency/Period
Frequency is one of the most important parameters of basic waveforms. For
different instrument models and waveforms, the available ranges of frequency
are different. For detailed information, please refer to the “SDG6000X
Datasheet”. The default frequency is 1 kHz.
Press Waveforms → Sine → Frequency, to set the frequency parameter.
When changing parameters, if the new value is valid, the value will be set. If
the new value is invalid, the instrument will set the value to the closest valid
setpoint. For example, if you set the frequency to “600 MHz”, which is not a
valid frequency, the instrument will select the nearest valid value. If Period
(rather than Frequency) is the desired parameter, press Frequency/Period
again to enter the period mode.
Figure 2-2 Setting the Frequency
To Set the Amplitude
The amplitude setting range is limited by the “Load” and “Frequency/Period”
settings. For detailed information, please refer to “SDG6000X Datasheet”.
22 SDG6000X User Manual
Press Waveforms → Sine → Amplitude, to set the amplitude parameter. If the
new value is invalid, the instrument will set the value to the closest valid
setpoint. For example, if you set the amplitude to “0 V”, which is not a valid
amplitude, the instrument will select the nearest valid value. If the high value is
the parameter you wish to set, press Amplitude/HighLevel again to switch to
high level entry.
Figure 2-3 Setting the Amplitude
Note:
If the output load is set to a specific resistance value (not HiZ), the amplitude
unit can be set as “Vpp”, "mVpp", "Vrms", "mVrms" or "dBm".
If load is set as “HighZ”, the amplitude unit can be set as “Vpp”, "mVpp",
"Vrms" or "mVrms".
To Set the Offset
The offset setting range is limited by the “Load” and “Amplitude/HighLevel”
settings. For detailed information, please refer to “SDG6000X Datasheet”. The
default value is 0 Vdc.
Press Waveforms → Sine → Offset, to set the offset parameter.
If the new value is invalid, the instrument will set the value to the closest valid
setpoint. For example, if you set the amplitude to “0 V”, which is not a valid
SDG6000X User Manual 23
amplitude, the instrument will select the nearest valid value. If the low value is
the parameter you wish to set, press Offset/LowLevel again to switch to low
level entry.
Figure 2-4 Setting the Offset
To Set the Phase
Press Waveforms → Sine → Phase, to set the phase parameter. When
changing parameter, if the new value is valid, the value will be set. Otherwise,
the limited value will be set.
Figure 2-5 Setting the Phase
Note：When the Independent phase mode is enabled, the phase parameter
cannot be modified.
24 SDG6000X User Manual
2.1.2 To Set the Square Waveform
Function
Menu
Explanation
Frequency/
Period
Set the signal frequency or period press
Amplitude/
HighLevel
Set the signal amplitude or high level press
Offset/
LowLevel
Set the signal offset or low level press
Phase
Set the phase of the signal
DutyCycle
Set the duty cycle of square waveform
Press Waveforms key to select the waveform function, and press the Square
softkey. The square waveform parameters are set by using the Square
operation menu, as shown in Figure 2-6. The parameters of square
waveforms include frequency/period, amplitude/high level, offset/low level,
phase and duty cycle.
Figure 2-6 Square Parameters Display Interface
Table 2-2 Menu Explanations of Square Waveform
Note: To select the secondary menu item, press the key a second time. For
example, if you wish to adjust the period of a waveform, press the softkey
below the “Frequency/Period” menu label until Period is highlighted and then
enter the value.
SDG6000X User Manual 25
To Set the Duty Cycle
Duty Cycle: The ratio of the positive pulse width to the period.
The duty cycle setting range is limited by the “Frequency/Period” setting. For
detailed information, please refer to “SDG6000X Datasheet”. The default
value is 50%.
Press Waveforms → Square → DutyCycle, to set the duty cycle parameter.
When changing parameter, if the new value is valid, the value will be set.
Otherwise, the nearest valid value will be set.
Figure 2-7 Setting the Duty Cycle
Note:
The methods of setting other parameters of square signal are similar to the
sine waveform function. Refer to “To Set the Sine Waveform” to configure the
other parameters.
26 SDG6000X User Manual
2.1.3 To Set the Ramp Waveform
Function
Menu
Explanation
Frequency/
Period
Set the signal frequency or period press
Amplitude/
HighLevel
Set the signal amplitude or high level press
Offset/
LowLevel
Set the signal offset or low level press
Phase
Set the phase of the signal
Symmetry
Set the symmetry of ramp waveform
Press Waveforms key to select the waveform function, and press the Ramp
softkey. The ramp waveform parameters are set by using the ramp operation
menu, as shown in Figure 2-8. The parameters for ramp waveforms include
frequency/period, amplitude/high level, offset/low level, phase and symmetry.
Figure 2-8 Ramp Parameters Display Interface
Table 2-3 Menu Explanations of Ramp Waveform
Note: To select the secondary menu item, press the key a second time. For
example, if you wish to adjust the period of a waveform, press the softkey
below the “Frequency/Period” menu label until Period is highlighted and then
enter the value.
SDG6000X User Manual 27
To Set the Symmetry
Symmetry: The percentage that the rising period relative to the waveform
period.
Range: 0~100%
Default Value: 50%
Press Waveforms → Ramp → Symmetry, to set the symmetry parameter.
When changing parameter, if the new value is valid, the value will be set.
Otherwise, the nearest valid value will be set.
Note:
Figure 2-9 Setting the Symmetry
The methods of setting other parameters of ramp signal are similar to sine
waveform function. Refer to “To Set the Sine Waveform” to configure the
other parameters.
28 SDG6000X User Manual
2.1.4 To Set the Pulse Waveform
Function
Menu
Explanation
Frequency/
Period
Set the signal frequency or period press
Amplitude/
HighLevel
Set the signal amplitude or high level press
Offset/
LowLevel
Set the signal offset or low level press
PulWidth/
DutyCycle
Set the signal pulse width or duty cycle press
Rise/
Fall
Setting the rise edge or fall edge for pulse waveform.
The current parameter will be switched at a second press
Delay
Setting the delay of pulse waveform
Press Waveforms key to select the waveform function, and press the Pulse
softkey. The pulse waveform parameters are set by using the pulse operation
menu, as shown in Figure 2-10. The parameters for pulse waveforms include
frequency/period, amplitude/high level, offset/low level, width, rise/fall and
delay.
Figure 2-10 Pulse Parameters Display Interface
Table 2-4 Menu Explanations of Pulse Waveform
Note: To select the secondary menu item, press the key a second time. For
example, if you wish to adjust the period of a waveform, press the softkey
SDG6000X User Manual 29
below the “Frequency/Period” menu label until Period is highlighted and then
enter the value.
To Set the Pulse Width/DutyCycle
Pulse width is defined as the time from the 50% threshold of a rising edge
amplitude to the 50% threshold of the next falling edge amplitude (as shown in
the figure below). The pulse width setting range is limited by the “Minimum
Pulse Width” and “Pulse Period” setting. For detailed information, please refer
to “SDG6000X Datasheet”. The default value is 200 μs.
Pulse duty cycle is defined as the percentage that the pulse width takes up in
the whole period. Pulse duty cycle and pulse width are correlative. Once a
parameter is changed, the other will be automatically changed.
Press Waveforms→ Pulse → PulWidth, to set the pulse width parameter.
When changing parameter, if the new value is valid, the value will be set.
Otherwise, the nearest valid value will be set. If you want to set the waveform
by duty cycle, press the PulWidth/DutyCycle key again, to switch into the duty
cycle parameter.
30 SDG6000X User Manual
Figure 2-11 Setting the Pulse Width
To Set the Rise/Fall Edge
Rise edge time is defined as the duration of the pulse amplitude rising from 10%
to 90% threshold, while fall edge time is defined as duration of the pulse
amplitude moving down from 90% to 10% threshold. The setting of rise/fall
edge time is limited by the currently specified pulse width limit. Users can set
rise edge and fall edge independently.
Press Waveforms → Pulse → Rise to set the rise edge parameter. When
changing parameter, if the new value is valid, the value will be set. Otherwise,
the nearest valid value will be set. If you want to set the waveform falling edge,
press the Rise/Fall key again, to switch to the falling edge parameter.
SDG6000X User Manual 31
Note:
Figure 2-12 Setting the Rise Edge
The methods of setting other parameters of pulse signal are similar to sine
waveform function. Refer to “To Set the Sine Waveform” to configure other
parameters.
32 SDG6000X User Manual
2.1.5 To Set the Noise Waveform
Function
Menu
Explanation
BandSet
Turn on/off the bandwidth setting
Stdev
Set the stdev of noise waveform
Mean
Set the mean of noise waveform
Bandwidth
Set the bandwidth of noise waveform
Press Waveforms key to select the waveform function, and press the Noise
softkey. The noise parameters are set by using the noise operation menu, as
shown in Figure 2-13. The parameters for noise include stdev, mean and
bandwidth. Noise is non-periodic signal which has no frequency or period.
Figure 2-13 Noise Parameters Display Interface
Table 2-5 Menu Explanations of Noise
To Set the Stdev
Press Waveforms → Noise → Stdev, to set the stdev parameter. When
changing parameter, if the new value is valid, the value will be set. Otherwise,
the closest valid value will be set.
SDG6000X User Manual 33
To Set the Mean
Figure 2-14 Setting the Stdev
Press Waveforms → Noise → Mean, to set the mean parameter. When
changing parameter, if the new value is valid, the value will be set. Otherwise,
the nearest valid value will be set.
Figure 2-15 Setting the Mean
Bandwidth
Press Waveforms → Noise → BandSet and choose “On”, and then the
bandwidth parameter can be set. When changing parameter, if the new value
is valid, the value will be set. Otherwise, the nearest valid value will be set.
34 SDG6000X User Manual
Figure 2-16 Setting the Bandwidth
SDG6000X User Manual 35
2.1.6 To Set the DC Waveform
Press Waveforms → Page 1/2 → DC, to enter the following interface. Please
note that there is a „DC offset‟ parameter at the middle of the screen.
Figure 2-17 DC Setting Interface
Note:
The method of setting offset of a DC signal is similar to Offset of the sine
waveform function. Refer to “To Set the Sine Waveform” to configure offset.
36 SDG6000X User Manual
2.1.7 To Set the Arbitrary Waveform
The Arb signal consists of two types: the system‟s built-in waveforms and the
user-defined waveforms. Built-in waveforms are stored in the internal
non-volatile memory. TrueArb output mode allows creation of arbitrary
waveforms that contain from 2 to 20 Mpts.
TrueArb
Choose Waveforms → Page 1/2 → Arb → Arb Mode and select the “TrueArb”
output mode. The parameters include sampling rate/frequency, amplitude/high
level, offset/ low level, phase and interpolation.
Figure 2-18 Arb Parameters Display Interface (TrueArb)
SDG6000X User Manual 37
Function
Menu
Explanations
SRate/
Frequency
Set the signal sampling rate or frequency
Amplitude/
HighLevel
Set the signal amplitude or high level press
Offset/
LowLevel
Set the signal offset or low level press
Arb Mode
Set the output mode to TrueArb or DDS
Arb Type
Select either built-in or stored waveforms
Page
1/2
Enter the next page
Phase
Set the phase of the signal
Interpolation
Set the interpolation mode to 0-order hold or Linear
Page
2/2
Return to the previous page
Table 2-6 Menu Explanations of Arb Waveform
Note: To select the secondary menu item, press the key a second time. For
example, if you wish to adjust the period of a waveform, press the softkey
below the “Frequency/Period” menu label until Period is highlighted and then
enter the value.
To Set the Sampling Rate
In TrueArb output mode, users can set the sampling rate (the output
points-per-second) or frequency of the arbitrary waveform. The instrument
outputs an arbitrary waveform point-by-point with the current sampling rate.
Press Waveforms → Page 1/2 → Arb → TrueArb → SRate, to set the
sampling rate parameter. When changing parameter, if the new value is valid,
the value will be set. Otherwise, the nearest valid value will be set.
To Set the Interpolation Mode
In TrueArb output mode, SDG6000X supports two interpolation modes of
including 0-order hold and Linear. User can set the parameter by pressing
38 SDG6000X User Manual
Interpolation in the operation menu. Figure 2-19 shows the output waveform
comparison of a 32-point sinusoidal arbitrary wave with "0-order hold"
interpolation and "linear" interpolation.
Figure 2-19 Comparison of "0-order hold" and "Linear" Interpolation Modes
DDS
Choose Waveforms → Page 1/2 → Arb → Arb Mode and select the “DDS”
output mode. The parameters include frequency/period, amplitude/high level,
offset/low level and phase.
Figure 2-20 Arb Parameters Display Interface (DDS)
SDG6000X User Manual 39
In DDS output mode, users can set the frequency or period of the arbitrary
waveform. The instrument outputs an arbitrary waveform which is made up of
certain points according to the current frequency.
Note:
The methods of setting other parameters of arbitrary signal are similar to sine
waveform function. Refer to “To Set the Sine Waveform” to configure other
parameters.
Built-in Arbitrary Waveform
There are plenty of built-in Arbitrary Waveforms as well as user-defined
Arbitrary Waveforms stored in the generator. To select one of them, follow the
instructions below.
To Select the Built-in Waveform
Choose Waveforms → Page 1/2 → Arb → Arb Type → Built-In to enter the
following interface, as shown in Figure 2-21.
Figure 2-21 Built-in Arbitrary Waveforms
Press Common, Math, Engine, Window, Trigo or other menus to switch to the
desired category (the selected category in the menu bar is highlighted), then
40 SDG6000X User Manual
rotate the knob or click the touch screen to choose the desired waveform (the
Item
Waveform
Explanation
Common
StairUp
Stair-up waveform
StairDn
Stair-down waveform
StairUD
Stair-up and down waveform
Trapezia
Trapezia waveform
Ppulse
Positive pulse
Npulse
Negative pulse
UpRamp
Up Ramp waveform
DnRamp
Down Ramp waveform
SineTra
Sine-Tra waveform
SineVer
Sine-Ver waveform
Math
ExpFall
Exponential Fall function
ExpRise
Exponential Rise function
LogFall
Log Fall function
LogRise
Log Rise function
Sqrt
Square root function
Root3
Cube Root function
X^2
X2 function
X^3
X3 function
Airy
Airy function
Besselj
Bessel I function
Bessely
Bessel II function
Dirichlet
Dirichlet function
Erf
Error function
Erfc
Complementary error function
ErfcInv
Inverted complementary error function
ErfInv
Inverted error function
Laguerre
4-times Laguerre polynomial
Legend
5-times Legend polynomial
Versiera
Versiera
Sinc
Sinc function
selected waveform will be highlighted). Select Accept or press the knob to
recall the corresponding waveform.
Table 2-7 Built-in Waveforms
SDG6000X User Manual 41
Item
Waveform
Explanation
Gaussian
Gaussian function
Dlorentz
Dlorentz function
Haversine
Haversine function
Lorentz
Lorentz function
Gauspuls
Gauspuls signal
Gmonopuls
Gmonopuls signal
Tripuls
Tripuls signal
Weibull
Weibull distribution
LogNormal
LogNormal Gaussian distribution
Laplace
Laplace distribution
Maxwell
Maxwell distribution
Rayleigh
Rayleigh distribution
Cauchy
Cauchy distribution
Engine
Cardiac
Cardiac signal
Quake
Analog quake waveform
Chirp
Chirp signal
TwoTone
TwoTone signal
SNR
Sine signal with noise
AmpALT
Increasing oscillation curve
AttALT
Descreasing oscillation curve
RoundHalf
RoundHalf Waveform
RoundsPM
RoundsPM Waveform
BlaseiWave
Time-velocity curve of explosive oscillation
DampedOsc
Time-displacement curve of damped oscillation
SwingOsc
Kinetic energy – time curve of swing oscillation
Discharge
Discharge curve of NI-MH battery
Pahcur
Current waveform of DC brushless motor
Combin
Combination function
SCR
SCR firing profile
TV
TV signal
Voice
Voice signal
Surge
Surge signal
Radar
Analog radar signal
Ripple
Ripple wave of battery
42 SDG6000X User Manual
Item
Waveform
Explanation
Gamma
Gamma signal
StepResp
Step-response signal
BandLimited
Bandwidth-limited signal
CPulse
C-Pulse
CWPulse
CW pulse
GateVibr
Gate self-oscillation signal
LFMPulse
Linear FM pulse
MCNoise
Mechanical construction noise
Window
Hamming
Hamming window
Hanning
Hanning window
Kaiser
Kaiser window
Blackman
Blackman window
GaussiWin
Gaussian window
Triangle
Triangle window (Fejer window)
BlackmanH
BlackmanH window
Bartlett-Hann
Bartlett-Hann window
Bartlett
Bartlett window
BohmanWin
Bohman window
ChebWin
Chebyshev window
FlattopWin
Flat top weighted window
ParzenWin
Parzen window
TaylorWin
Taylor window
TukeyWin
Tukey (tapered cosine) window
Trigo
Tan
Tangent
Cot
Cotangent
Sec
Secant
Csc
Cosecant
Asin
Arc sine
Acos
Arc cosine
Atan
Arc tangent
ACot
Arc cotangent
CosH
Hyperbolic cosine
CosInt
Integral cosine
Coth
Hyperbolic cotangent
SDG6000X User Manual 43
Item
Waveform
Explanation
Csch
Hyperbolic cosecant
SecH
Hyperbolic secant
SinH
Hyperbolic sine
SinInt
Integral sine
TanH
Hyperbolic tangent
ACosH
Arc hyperbolic cosine
ASecH
Arc hyperbolic secant
ASinH
Arc hyperbolic sine
ATanH
Arc hyperbolic tangent
ACsch
Arc hyperbolic cosecant
ACoth
Arc hyperbolic cotangent
Square 1
SquareDuty01
Square waveform with 1% duty cycle
SquareDuty02
Square waveform with 2% duty cycle
SquareDuty04
Square waveform with 4% duty cycle
SquareDuty06
Square waveform with 6% duty cycle
SquareDuty08
Square waveform with 8% duty cycle
SquareDuty10
Square waveform with 10% duty cycle
SquareDuty12
Square waveform with 12% duty cycle
SquareDuty14
Square waveform with 14% duty cycle
SquareDuty16
Square waveform with 16% duty cycle
SquareDuty18
Square waveform with 18% duty cycle
SquareDuty20
Square waveform with 20% duty cycle
SquareDuty22
Square waveform with 22% duty cycle
SquareDuty24
Square waveform with 24% duty cycle
SquareDuty26
Square waveform with 26% duty cycle
SquareDuty28
Square waveform with 28% duty cycle
SquareDuty30
Square waveform with 30% duty cycle
SquareDuty32
Square waveform with 32% duty cycle
SquareDuty34
Square waveform with 34% duty cycle
SquareDuty36
Square waveform with 36% duty cycle
SquareDuty38
Square waveform with 38% duty cycle
SquareDuty40
Square waveform with 40% duty cycle
SquareDuty42
Square waveform with 42% duty cycle
SquareDuty44
Square waveform with 44% duty cycle
44 SDG6000X User Manual
Item
Waveform
Explanation
SquareDuty46
Square waveform with 46% duty cycle
SquareDuty48
Square waveform with 48% duty cycle
SquareDuty50
Square waveform with 50% duty cycle
SquareDuty52
Square waveform with 52% duty cycle
SquareDuty54
Square waveform with 54% duty cycle
SquareDuty56
Square waveform with 56% duty cycle
SquareDuty58
Square waveform with 58% duty cycle
SquareDuty60
Square waveform with 60% duty cycle
SquareDuty62
Square waveform with 62% duty cycle
SquareDuty64
Square waveform with 64% duty cycle
SquareDuty66
Square waveform with 66% duty cycle
SquareDuty68
Square waveform with 68% duty cycle
Square 2
SquareDuty70
Square waveform with 70% duty cycle
SquareDuty72
Square waveform with 72% duty cycle
SquareDuty74
Square waveform with 74% duty cycle
SquareDuty76
Square waveform with 76% duty cycle
SquareDuty78
Square waveform with 78% duty cycle
SquareDuty80
Square waveform with 80% duty cycle
SquareDuty82
Square waveform with 82% duty cycle
SquareDuty84
Square waveform with 84% duty cycle
SquareDuty86
Square waveform with 86% duty cycle
SquareDuty88
Square waveform with 88% duty cycle
SquareDuty90
Square waveform with 90% duty cycle
SquareDuty92
Square waveform with 92% duty cycle
SquareDuty94
Square waveform with 94% duty cycle
SquareDuty96
Square waveform with 96% duty cycle
SquareDuty98
Square waveform with 98% duty cycle
SquareDuty99
Square waveform with 99% duty cycle
Medical
EOG
Electro-Oculogram
EEG
Electroencephalogram
EMG
Electromyogram
Pulseilogram
Pulseilogram
ResSpeed
Speed curve of respiration
ECG1
Electrocardiogram 1
SDG6000X User Manual 45
Item
Waveform
Explanation
ECG2
Electrocardiogram 2
ECG3
Electrocardiogram 3
ECG4
Electrocardiogram 4
ECG5
Electrocardiogram 5
ECG6
Electrocardiogram 6
ECG7
Electrocardiogram 7
ECG8
Electrocardiogram 8
ECG9
Electrocardiogram 9
ECG10
Electrocardiogram 10
ECG11
Electrocardiogram 11
ECG12
Electrocardiogram 12
ECG13
Electrocardiogram 13
ECG14
Electrocardiogram 14
ECG15
Electrocardiogram 15
LFPulse
Waveform of the low frequency pulse electrotherapy
Tens1
Waveform 1 of the nerve stimulation electrotherapy
Tens2
Waveform 2 of the nerve stimulation electrotherapy
Tens3
Waveform 3 of the nerve stimulation electrotherapy
Mod
AM
Sectional sine AM signal
FM
Sectional sine FM signal
PFM
Sectional pulse FM signal
PM
Sectional sine PM signal l
PWM
Sectional PWM signal
Filter
Butterworth
Butterworth filter
Chebyshev1
Chebyshev1 filter
Chebyshev2
Chebyshev2 filter
Demo
demo1_375pts
TrueArb waveform 1（375 pts）
demo1_16kpts
TrueArb waveform 1（16384 pts）
demo2_3kpts
TrueArb waveform 2（3000 pts）
demo2_16kpts
TrueArb waveform 2（16384 pts）
To Select the Stored Waveform
Choose Waveforms → Page 1/2 → Arb → Arb Type → Stored Waveforms to
enter the following interface, as shown in Figure 2-22.
46 SDG6000X User Manual
Figure 2-22 Stored Waveform Display Interface
Rotate the knob or touch the screen to choose the desired waveform. Then
select Recall or press the knob to recall the corresponding waveform.
SDG6000X User Manual 47
Function
Menu
Explanation
BitRate/
Period
Set the signal bit rate or period
Amplitude/
HighLevel
Set the signal amplitude or high level
Offset/
LowLevel
Set the signal offset or low level
Length
Set the length of PRBS
Logic Level
Set the logic level of PRBS
Rise/Fall
Set the rising and falling edge of PRBS
2.1.8 To Set the Pseudo Random Binary Sequence
(PRBS)
Press Waveforms key to select the waveform function, and then press the
PRBS softkey. The parameters of pseudo random binary sequence (PRBS)
are set by using the PRBS operation menu, as shown in Figure 2-23. The
parameters of PRBS include bitrate/period, amplitude/high level, offset/low
level, length, logic level and rise/fall.
Figure 2-23 PRBS setting interface
Table 2-8 Menu Explanations of PRBS
Note: To select the secondary menu item, press the key a second time. For
example, if you wish to adjust the period of a waveform, press the softkey
48 SDG6000X User Manual
below the “Frequency/Period” menu label until Period is highlighted and then
enter the value.
To Set the BitRate/Period
Press Waveforms → Page 1/2 → PRBS → BitRate, to set the bit rate
parameter. When changing parameter, if the new value is valid, the value will
be set. Otherwise, the nearest valid value will be set. If Period (rather than
BitRate) is the desired parameter, press BitRate/Period again to enter the
period mode.
Figure 2-24 Setting the Bit Rate
To Set the Length
Press Waveforms → Page 1/2 → PRBS → Length, to set the length
parameter. The range of length is from 3 to 32. When changing parameter, if
the new value is valid, the value will be set; otherwise, the limited value will be
set.
SDG6000X User Manual 49
To Set the Logic Level
Figure 2-25 Setting the Length
Press Waveforms → Page 1/2 → PRBS → Logic Level, to set the logic level.
By selecting the corresponding type of logic level, the high level and low level
of PRBS can be configured automatically. If Differential is set to ON, channel
one will output the waveform with normal polarity while channel two will output
the waveform with inverted polarity.
Figure 2-26 Setting the Logic Level
50 SDG6000X User Manual
Logic Level
High Level
Low Level
TTL/CMOS
5 V
0 V
LVTTL/LVCOMS
3.3 V
0 V
ECL
-900 mV
-1.7 V
LVPECL
2.4 V
1.6 V
LVDS
1.6 V
900 mV
Table 2-9 Correspondence between logic level and high, low level
To Set the Rise/Fall Edge
Press Waveforms → Page 1/2 → PRBS → Rise/Fall, to set the rise/fall edge
parameter. When changing parameter, if the new value is valid, the value will
be set. Otherwise, the nearest valid value will be set.
Figure 2-27 Setting the Rise/Fall
Note:
The methods of setting other parameters of the PRBS are similar to the sine
waveform function. Refer to “To Set the Sine Waveform” to configure other
parameters.
SDG6000X User Manual 51
2.2 Harmonic Function
The SDG6000X can be used as a harmonic generator to output harmonics
with specified order, amplitude and phase values. According to the Fourier
transform, a periodic time domain waveform is the superposition of a series of
sine waveforms as shown in the equation below:
Generally, the component with the frequency term f1 is called the fundamental
waveform, where A1 is the fundamental waveform amplitude, and φ1 is the
fundamental waveform phase. The frequencies of the other components
(harmonics) are all integral multiples of the fundamental waveform.
Components whose frequencies are odd multiples of the fundamental
waveform frequency are called odd harmonics and components whose
frequencies are even multiples of the fundamental waveform frequency are
called even harmonics.
Press Waveforms → Sine → Harmonic and choose “On”, then press
Harmonic Parameter to enter the following interface.
Figure 2-28 Harmonic Interface
52 SDG6000X User Manual
Table 2-10 Menu Explanations of Harmonic
Function
menu
Explanations
Type
Set the harmonic type to “odd”, “ever” or “all”
Order
Set the order of the harmonic
Harmonic
Ampl
Set the amplitude of the harmonic
Harmonic
Phase
Set the phase of the harmonic
Cancel
Return to the sine parameters menu
To Select the Harmonic Type
The SDG6000X can output odd, even, and user-defined orders of harmonics.
After entering the harmonic setting menu, press Type to select the desired
harmonic type.
1. Press Even, the instrument will output the fundamental waveform and its
even harmonics.
2. Press Odd, the instrument will output the fundamental waveform and its
odd harmonics.
3. Press All, the instrument will output fundamental waveform and all the
user-defined orders of harmonics.
To Set the Harmonic Order
After entering the harmonic setting menu, press Order, then use the numeric
keyboard or knob to input the desired value.
The range is limited by the maximum output frequency of the instrument
and current fundamental waveform frequency.
Range: From 2 to the maximum output frequency of the instrument ÷
current fundamental waveform frequency.
To Set the Harmonic Amplitude
After entering the harmonic setting menu, press Harmonic Ampl to set the
amplitude of selected harmonic.
1. Press Order to select the sequence number of the harmonic to be set.
2. Press Harmonic Ampl to set the amplitude of the harmonic selected. Use
the arrow keys and knob to change the value. Or use the numeric
SDG6000X User Manual 53
keyboard to input the amplitude value and then select the desired unit from
the pop-up menu. The units available are Vpp, mVpp and dBc.
To Set the Harmonic Phase
After entering the harmonic setting menu, press Harmonic Phase to set the
phase of selected harmonic.
1. Press Order to select the sequence number of the harmonic to be set.
2. Press Harmonic Phase to set the phase of the harmonic selected. Use the
arrow keys and knob to change the value. Or use the numeric keyboard to
input the phase value and then select the unit.
54 SDG6000X User Manual
2.3 To Set IQ Waveform (Optional)
Resampling
32X
Resampling
32X
Digital
Quadrature
Modulator
D/A
D/A
I Data
RAM
Q Data
RAM
500Sa/s
~75MSa/s
75MSa/s 2.4GSa/s
Iout
Qout
IQ Data Flow
The SDG6000X can be used as an IQ waveform generator, providing ASK,
PSK, QAM, FSK, MSK and multi-tone signals. The EasyIQ software is
necessary when using SDG6000X to generate an IQ waveform. The EasyIQ is
a PC program used to download IQ baseband waveform data to the
SDG6000X through a USB or LAN device interface.
Figure 2-29 IQ modulation
2.3.1 Front Panel IQ Control
Press Waveforms key to select the waveform function and then press the I/Q
softkey. The IQ waveform parameters are set by using the IQ operation menu.
In IQ mode, the two channel output one I/Q pair, and all the parameters are set
for the I/Q pair. The parameters available for IQ waveforms include Fsymb
(symbol rate)/Fs (sampling rate), amplitude and center frequency.
Figure 2-30 IQ modulation
SDG6000X User Manual 55
Iin(t)
cosine sine
Qin(t)
CH1
CH2
To Set the Center Frequency
Press Parameter→ Center Frequency, to set the center frequency. The range
of center frequency is 0Hz ~ 500MHz. If the center frequency is 0Hz, the two
channels will output the IQ baseband signal. If the center frequency is not zero
the two channels will output an intermediate frequency (IF) IQ modulation
signal whose center frequency is the intermediate frequency. The figure below
shows the diagram of the IQ modulator in the SDG6000X Figure 2-31.
Figure 2-31 IQ Modulator in the SDG6000X
To Set the Fsymb/Fs
Fsymb (symbol rate) can be transformed to Fs (sampling frequency)
according to the Oversampling factor (Pts/Symbol). The formula below shows
the relationship:
Fs=Fsymb*(Pts/Symbol)
The range of Fs is from 500 Hz to 75 MHz.
Press Parameter → Fsymb, to set the Fsymb parameter. If Fs is the desired
parameter, press Fsymb/Fs again to enter the Fs Figure 2-32
56 SDG6000X User Manual
Figure 2-32 Setting the Symbol Rate
22
IQ
To Set the Amplitude
Press Parameter→ Amplitude to set the amplitude.
When the unit is V
the I / Q (
).
rms
, mV
or dBm, the amplitude equal-to the modulus of
rms
Figure 2-33 Setting the Amplitude
To Set the Trigger Source
Press Parameter→Trigger Source, to set the Trigger Source, including
internal trigger, external trigger and manual trigger, as shown in Figure 2-34.
SDG6000X User Manual 57
Figure 2-34 Setting the Trigger Source
1. Internal Trigger
Choose Trigger Source → Internal. Internal trigger is the default trigger source
of IQ playback.
2. External Trigger
Choose Trigger Source → External, and the generator accepts the trigger
signal inputted from the [Aux In/Out] connector at the rear panel. One period of
the IQ waveform will be generated for every trigger signal received at the Aux
In/Out input 5V CMOS pulse with the specified polarity.
3. Manual Trigger
Choose Trigger Source → Manual, and one period of the IQ waveform will be
generated once the Trigger softkey is pressed.
I/Q Data
Choose Parameter→I/Q Data, to select the built-in waveforms or the stored
waveforms.
1. Built-in Waveforms
Choose Parameter→I/Q Data→Built-in, to select a built-in IQ waveform,
including ASK, PSK and QAM. Choose the desired IQ waveform by
touching where it is on the screen, or rotating the knob to its position and
push down the knob.
2. Stored Waveforms
Choose Parameter→I/Q Data→Stored Waveforms, to select a user stored IQ
58 SDG6000X User Manual
waveform. Rotate the knob to select the .arb file and then push down the knob
Parameter
Explanation
Gain Balance
Amplitude gain balance, adjusting the difference between I and Q
amplitude, range : -4 dB~4 dB
I/Q Offset
I or Q DC offset, range: -0.25 Vdc~0.25 Vdc
Angle Adjustment
Not supported for now
or press the Recall key to recall the IQ data. The Browse key is used to enter
the subdirectory, and the Delete key is used to delete the selected file.
Note: When the EasyIQ downloads a waveform from PC to the instrument,
the instrument will store the waveform as a .arb file. The file can also be
copied to the instrument by a USB flash disk.
I/Q Adjustment
Choose Parameter→I/Q Adjustment to enter the adjustment interface, as
show in Figure 2-35. The adjust parameters include Gain Balance, I/Q Offset
and Angle Adjustment. Detailed description is show in the table below:
Table 2-11 IQ Adjustment Parameters
Figure 2-35 Setting I/Q Adjustment
SDG6000X User Manual 59
2.3.2 EasyIQ Software
The IQ baseband waveform data can be generated by the EasyIQ software.
The setting of EasyIQ includes Data Source, Modulation and Filter, as show in
Figure 2-36.
Figure 2-36 EasyIQ Interface
2.3.2.1 Data Source
Data Source panel sets parameters for the symbol data that is to be
modulated. As show in Figure 2-37, in the Data Source console, you can set
the data setup, symbol length and symbol rate.
Figure 2-37 EasyIQ Data Source Setting
60 SDG6000X User Manual
Data Setup
Selects a data source type for modulation.
Choices: PN7 | PN9 | PN15 | PN23 | User File | Customer Bit Pattern
Default: PN9
PN7 | PN9 | PN15 | PN23:
When selecting “PN7 | PN9 | PN15 | PN23” as data source type, software
generates data source bit automatically.
PN is the Pseudorandom Noise, a signal similar to noise which satisfies one or
more of the standard tests for statistical randomness. Although it seems to
lack any definite pattern, pseudorandom noise consists of a deterministic
sequence of pulses that will repeat itself after its period.
User File:
When selecting “User File” as data source type, a file selection dialog box
pops up for you to select a TXT(*.txt) file as input data bits. In the user data file,
only 0 or1 is acceptable. Any other characters are illegal and an error
message box will pop up.
Customer Bit Pattern:
When selecting “Customer Bit Pattern” as data source type, a Pattern Editor
window opens for data bits editing. You can input 0|1 in the input box manually
or insert PN7|PN9|PN15 data bits by corresponding button, and you can also
save the data to a new file and recall data from an existing file. Use “Clear”
button to clear the data edit box.
Figure 2-38 Custom Bit Pattern Editor
Symbol Length
Sets the length of modulated symbols.
Range: 100 to 100000
SDG6000X User Manual 61
Default: 512
Symbol Rate
Sets the symbol rate (symbols per second) of the waveform.
Range: 250 to 37500000/Oversampling Symbol/s
Default: 1000000 Symbol/s
Bits-Per-Symbol
Displays the number of bits contained in one modulated symbol. It is read only,
not settable.
2.3.2.2 Modulation
Modulation panel sets parameters for user selected modulation type.
Figure 2-39 Modulation Interface
Choices: APSK & QAM | MFSK | Multitone | Custom
Default: APSK & QAM
APSK & QAM
Selects a type in APSK & QAM category for modulation.
Choices: 2ASK | 4ASK | 8ASK | BPSK | QPSK | 8PSK | DBPSK | DQPSK |
62 SDG6000X User Manual
D8PSK | 8QAM | 16QAM | 32QAM | 64QAM | 128QAM | 256QAM
Default: 16QAM
After a modulation type is selected, the constellation of current modulation is
displayed on right side of the panel:
You can double-click on the constellation display to show a zoomed window of
the constellation, you can also double click on the zoomed constellation
window to close it.
Gray:
Turns ON or OFF the Gray code for the constellation data.
Default: OFF
MFSK
Selects a type in MFSK category for modulation.
Choices: 2FSK | 4FSK | 8FSK | 16FSK | MSK
Default: 2FSK
2FSK | 4FSK | 8FSK | 16FSK:
When selecting 2FSK | 4FSK | 8FSK | 16FSK as current modulation type, FSK
Deviation setting is displayed on the bottom of the panel
FSK Dev (Hz):
SDG6000X User Manual 63
Sets frequency deviation for FSK modulation in Hz.
Range: 0 to 0.8 * Symbol Rate * Oversampling Hz
Default: 600000 Hz
The Symbol and FSK deviation table is displayed on the right side of the
panel:
MSK:
When selecting MSK as current modulation type, the filter type can only be
selected as Gaussian.
Multitone
Check the to set the multi-tone signal. Below is the interpretion for
the multi-tone parameters.
Sample Rate: sample rate of multi-tone modulation in MHz.
Range: 0.002 to 37.5 MHz
Default: 2 MHz
Freq Spacing: frequency spacing of multi-tone modulation in MHz.
Range: 0 to Sample Rate/1.28 MHz
Default: 1 MHz
Tone Number: tones number of multi-tone modulation.
Range: 1 to 20
Default: 1
Single Side: Turns ON or OFF single side modulation for multi-tone.
Default: OFF
64 SDG6000X User Manual
Figure 2-40 Multi-tone
Custom
Sets a custom constellation for modulation. After selecting Custom modulation
type, a custom constellation editing window is displayed, as shown in Figure
2-41:
Figure 2-41 Custom modulation
In the custom constellation editing window, you can preset the constellation
data to a known modulation type first by pressing buttons,
and then you can insert or delete constellation points and edit the IQ data for
each constellation point manually. You can also recall constellation data from
an existing file and save the edited constellation data to a new file. “Normalize”
button is used to normalize all constellation data for RMS value = 1.
On the right side of the window, it shows the constellation display of current
editing. You can input a name for the constellation, this name will be displayed
beside the “Custom” modulation item after you click “OK” button. You can also
turn ON or OFF symbol display on the constellation display by clicking “Show
Symbol” button.
SDG6000X User Manual 65
Note:
When editing the constellation points, the number of points must be a value of
power of 2 and the Symbol values cannot be duplicated, otherwise there will
be error message when you click “OK” button.
2.3.2.3 Filter
EasyIQ provides three types of filters, including raised cosine filter, root raised
cosine filter and Gaussian filter. To interface is shown in Figure 2-42.
Figure 2-42 Filter interface
Filter Type:
Sets filter type for current modulation.
Choices: None | RaisedCosine | RootCosine | Gaussian
Default: Gaussian for MSK and RootCosine for all other modulation types
Note:
For MSK modulation, only Gaussian filter type is supported.
Filter Alpha/BT:
Sets the Alpha factor of the filter (BT of Gaussian filter).
Alpha Range: 0.01~1
66 SDG6000X User Manual
BT Range: 0.1~5
Default: 0.5
Filter Length:
Set length of filter in symbols.
Range: 1~min (Symbol Length, 512)
Default: 32
Oversampling:
Sets the oversampling factor of the waveform. The waveform Sample Rate is
determined based on Symbol Rate and Oversampling factor.
Range: 2 - 32.
Default: 2
2.3.2.4 Waveform Display
After setting all parameters for modulation and click the button on
the top of the window, the modulated waveform is displayed on the lower half
of the main window. You can click “FFT Spectrum” or “IQ Waveform” tab to
display the Frequency domain waveform or Time domain waveform
alternatively.
Notes:
1. Right click on the waveform display to hide the display. You can click
“Update” button or the “FFT Spectrum”/“IQ Waveform” tab to show the
waveform plot again.
2. When the Mouse is on waveform display, you can use the scroll button
of your Mouse to zoom in or zoom out the waveform plots. You can also
click “Update” button to restore the default display of the plots.
FFT Spectrum Display
After clicking “FFT Spectrum” tab, the frequency domain plot of modulated IQ
data by FFT is displayed.
SDG6000X User Manual 67
Figure 2-43 Waveform Spectrum
The horizontal coordinate shows the Frequency values in Hz and the vertical
coordinate shows the Magnitude values in dB.
IQ Waveform Display
After clicking “IQ Waveform” tab, the Time domain plot of modulated IQ data is
displayed.
Figure 2-44 Time-domain Waveform
The I/Q data plots are displayed separately in two graphs. The horizontal
coordinate shows the symbol values and the vertical coordinate shows the
amplitude values of I/Q data.
2.3.2.5 Waveform Download
Click the button on the top of the window, the download interface is
displayed as show in Figure 2-45. You can download the IQ baseband data
68 SDG6000X User Manual
generated from current settings or from file which has been exported from the
EasyIQ with the ".arb" suffix.
Figure 2-45 Download Interface
Two types of connection are possible for the EasyIQ to access the
SDG6000X:
USB Device
If the SDG6000X is connected to the PC through USB device correctly, in the
"VISA Address" drop down list the USBTMC Visa address of the SDG6000X
will be displayed, as shown in Figure 2-46. Select the address and click the
"download" button to download the waveform data.
Figure 2-46 Download Data through USB Device
LAN
If the SDG6000X is connected to the PC through LAN correctly, input the IP
SDG6000X User Manual 69
address of the SDG6000X to replace the "LOCALHOST" characters, as
shown in Figure 2-47. And then click the "download" button to download the
waveform data.
Figure 2-47 Download Data through LAN
70 SDG6000X User Manual
2.4 Modulation Functions
Press the Mod key to enable modulation. The SDG6000X can generate AM,
FM, ASK, FSK, PSK, PM, PWM and DSB-AM modulated waveforms.
Modulation parameters vary with the types of the modulation. In AM, users can
set the source (internal/external), depth, modulating frequency, modulating
waveform and carrier. In DSB-AM, users can set the source (internal/external),
modulating frequency, modulating waveform and carrier. In FM, users can set
the source (internal/external), modulating frequency, frequency deviation,
modulating waveform and carrier. In PM, users can set the source
(internal/external), phase deviation, modulating frequency, modulating
waveform and carrier. In ASK, users can set the source (internal/external), key
frequency and carrier. In FSK, users can set the source (internal/external), key
frequency, hop frequency and carrier. In PSK, users can set the source
(internal/external), key frequency, polarity and carrier. In PWM, users can set
the source (internal/external), modulating frequency, width/duty cycle
deviation, modulating waveform and carrier.
SDG6000X User Manual 71
Function
Menu
Settings
Explanation
Type
AM
Amplitude modulation
Source
Internal
The source is internal
External
The source is external signal from the [Aux In/Out]
connector at the rear panel
AM Depth
The modulation depth
Shape
Sine
The modulating waveform
Square
Triangle
UpRamp
DnRamp
Noise
Arb
AM Freq
Frequency of the modulating waveform
Range: 1mHz~1MHz (internal source only)
2.4.1 AM
The modulated waveform consists of two parts: the carrier and the modulating
waveform. In AM, the amplitude of the carrier varies with the instantaneous
voltage of the modulating waveform.
Press Mod → Type → AM, the parameters of AM modulation are shown in
Figure 2-48.
Figure 2-48 Setting Interface of AM Modulation
Table 2-12 Menu Explanations of the AM Parameters
72 SDG6000X User Manual
To Select Modulation Source
The SDG6000X can accept a modulating signal from an internal or external
modulation source. Press Mod → AM → Source to select “Internal” or
“External” modulation source. The default is “Internal”.
1. Internal Source
When internal modulation source is selected, press Shape to select Sine,
Square, Triangle, UpRamp, DnRamp, Noise or Arb as the modulating
waveform.
Square: 50% duty cycle
Triangle: 50% symmetry
UpRamp: 100% symmetry
DnRamp: 0% symmetry
Arb: specified arbitrary waveform
Note:
Noise can be used as modulating waveform but cannot be used as carrier.
2. External Source
When external modulation source is selected, the generator accepts external
modulating signals from the [Aux In/Out] connector at the rear panel. At this
time, the amplitude of the modulated waveform is controlled by the signal level
applied to the connector. For example, if the amplitude of the external
modulating signal is 12 Vpp, the AM modulation depth will be 100%. The
output amplitude will be the maximum when the modulating signal is +6 V and
the minimum when the modulating signal is -6 V.
Key Points:
How to achieve modulations within the two channels? The SDG6000X can
use one channel as a modulating source for the other channel. The following
example takes the output signal of CH2 as the modulating waveform.
1. Connect the CH2 output terminal to [Aux In/Out] connector on the rear
panel using a BNC cable.
2. Select CH1 and press Mod to select the desired modulation type, set the
SDG6000X User Manual 73
corresponding parameters, and then set the source to external
3. Select CH2, select the desired modulating waveform and set the
corresponding parameters.
4. Press Output to enable the output of CH1 and CH2.
To Set Modulation Depth
The modulation depth is expressed as a percentage of the overall amplitude
set by the amplitude waveform parameter. AM modulation depth varies from
0% to 120%. Press AM Depth to set the parameter, and then use the numeric
keyboard or arrow keys and knob to input the desired value.
The amplitude of AM modulated waveform varies with different modulation
depth, but the power of the carrier is constant.
For an external source, the depth of AM is controlled by the voltage level
on the connector [Aux In/Out].
When external modulation source is selected, this menu is hidden.
To Set Modulation Frequency
When internal modulation source is selected, press AM Freq to highlight the
parameter, then use the numeric keyboard or arrow keys and knob to input the
desired value.
The modulation frequency ranges from 1 mHz to 1 MHz.
When external modulation source is selected, this menu is hidden.
74 SDG6000X User Manual
2.4.2 DSB-AM
Function
Menu
Settings
Explanation
Type
DSB-AM
DSB Amplitude modulation
Source
Internal
The source is internal
External
The source is external signal from the [Aux In/Out]
connector at the rear panel
DSB Freq
Frequency of the modulating waveform.
Range: 1mHz~1MHz (internal source only)
Shape
Sine
The modulating waveform
Square
Triangle
UpRamp
DnRamp
Noise
Arb
DSB-AM is an abbreviation for Double-SideBand Suppressed Carrier –
Amplitude Modulation. Press Mod → Type → DSB-AM. The parameters of
DSB-AM modulation are shown in Figure 2-49.
Figure 2-49 Setting Interface of DSB-AM Modulation
Table 2-13 Menu Explanations of the DSB-AM Parameters
Note: The way of setting the parameters of a DSB-AM signal is similar to AM.
SDG6000X User Manual 75
Function
Menu
Settings
Explanation
Type
FM
Frequency modulation
Source
Internal
The source is internal
External
The source is external signal from the [Aux In/Out]
connector at the rear panel
FM Dev
The frequency deviation from the carrier frequency
Shape
Sine
The modulating waveform
Square
Triangle
UpRamp
DnRamp
Noise
Arb
FM Freq
Frequency of the modulating waveform
Range: 1mHz~1MHz (internal source only)
2.4.3 FM
The modulated waveform consists of two parts: the carrier and the modulating
waveform. In FM, the frequency of the carrier varies with the instantaneous
voltage of the modulating waveform.
Press Mod → Type → FM, the parameters of FM modulation are shown in
Figure 2-50.
Figure 2-50 Setting Interface of FM Modulation
Table 2-14 Menu Explanations of the FM Parameters
76 SDG6000X User Manual
To Select Modulation Source
The SDG6000X can accept a modulating signal from an internal or external
modulation source. Press Mod → FM → Source to select “Internal” or
“External” modulation source. The default is “Internal”.
1. Internal Source
The way of selecting the internal source is similar to AM.
2. External Source
When an external FM modulation source is selected, the generator accepts
the external modulating signal from the [Aux In/Out] connector at the rear
panel. At this time, the frequency of the modulated waveform is controlled by
the signal level applied to the connector. For example, if the frequency
deviation is set to 1 kHz, the output frequency will increase 1 kHz based on the
carrier frequency setting when the modulating signal is +6 V and decrease 1
kHz when the modulating signal is -6 V.
To Set Frequency Deviation
Press FM Dev to highlight the parameter, and then use the numeric keyboard
or arrow keys and knob to input the desired value.
The deviation should be equal-to or less-than the carrier frequency.
The sum of the deviation and the carrier frequency should be equal-to or
less–than maximum frequency of the selected carrier waveform.
Note:
The way of setting other parameters of FM is similar to AM.
SDG6000X User Manual 77
Function
Menu
Settings
Explanation
Type
PM
Phase modulation
Source
Internal
The source is internal
External
The source is external signal from the [Aux In/Out]
connector at the rear panel
Phase Dev
Phase deviation ranges from 0° ~ 360°
Shape
Sine
The modulating waveform
Square
Triangle
UpRamp
DnRamp
Noise
Arb
PM Freq
Frequency of the modulating waveform
Range: 1mHz~1MHz (internal source only)
2.4.4 PM
The modulated waveform consists of two parts: the carrier and the modulating
waveform. In PM, the phase of the carrier varies with the instantaneous
voltage level of the modulating waveform.
Press Mod → Type → PM, the parameters of PM modulation are shown in
Figure 2-51 .
Figure 2-51 Setting Interface of PM Modulation
Table 2-15 Menu Explanations of the PM Parameters
78 SDG6000X User Manual
To Select the Modulation Source
The SDG6000X can accept a modulating signal from an internal or external
modulation source. Press Mod → PM → Source to select “Internal” or
“External” modulation source. The default is “Internal”.
1. Internal Source
The way of selecting the internal source is similar to AM.
2. External Source
When external PM modulation source is selected, the generator accepts an
external modulating signal from the [Aux In/Out] connector at the rear panel.
At this time, the phase of the modulated waveform is controlled by the signal
level applied to the connector. For example, if the phase deviation is set to
180°, the output phase will increase 180° when the modulating signal is +6 V
and decrease 180° when the modulating signal is -6 V.
To Set Phase Deviation
Press Phase Dev to highlight the parameter, and then use the numeric
keyboard or arrow keys and knob to input the desired value.
Use the numeric keyboard or arrow keys and knob to input the desired
value.
The range of phase deviation is from 0° to 360° and the default value is
100°.
Note:
The way of setting other parameters of PM is similar to AM.
SDG6000X User Manual 79
Function
Menu
Settings
Explanation
Type
FSK
Frequency shift keying modulation
Source
Internal
The source is internal
External
The source is external signal from the [Aux In/Out]
connector at the rear panel
Key Freq
Frequency at which the output frequency shifts between
the carrier frequency and the hop frequency
Range: 1mHz~1MHz (internal source only)
Hop Freq
The hop frequency
2.4.5 FSK
FSK is Frequency Shift Keying, the output frequency of which switches
between two preset frequencies (carrier frequency and hop frequency or
sometimes known as mark frequency (1) and space frequency (0)).
Press Mod → Type → FSK, the parameters of FSK modulation are shown in
Figure 2-52.
Figure 2-52 Setting Interface of FSK Modulation
Table 2-16 Menu Explanations of the FSK Parameters
To Select Modulation Source
The SDG6000X can accept a modulating signal from an internal or external
modulation source. Press Mod → FSK → Source to select “Internal” or
80 SDG6000X User Manual
“External” modulation source. The default is “Internal”.
1. Internal Source
When internal modulation source is selected, the modulating waveform is a
square with 50% duty cycle.
2. External Source
When external modulation source is selected, the generator accepts external
modulating signal from the [Aux In/Out] connector at the rear panel.
The external modulating signal of FSK must be a square wave which complies
with 5V CMOS level specification.
To Set Key Frequency
When internal modulation source is selected, press Key Freq to set the rate at
which the output frequency shifts between “carrier frequency” and “hop
frequency”.
Use the numeric keyboard or arrow keys and knob to input the desired
value.
The key frequency ranges from 1 mHz to 1 MHz.
When external modulation source is selected, this menu is hidden.
To Set Hop Frequency
The range of the hop frequency depends on the carrier frequency currently
selected. Press Hop Freq to highlight the parameter, and then use the numeric
keyboard or arrow keys and knob to input the desired value.
Sine: 1uHz~ maximum frequency
Square: 1uHz~ maximum frequency
Ramp: 1uHz~ maximum frequency
Arb: 1uHz~ maximum frequency
SDG6000X User Manual 81
Function
Menu
Settings
Explanation
Type
ASK
Amplitude shift keying modulation
Source
Internal
The source is internal
External
The source is external signal from the [Aux In/Out]
connector at the rear panel
Key Freq
Frequency at which the output amplitude shifts between
the carrier amplitude and zero
Range: 1mHz~1MHz (internal source only)
2.4.6 ASK
When using ASK (Amplitude Shift Keying), the amplitude of the modulated
waveform switches between the carrier frequency amplitude and zero. The
key frequency is the shift rate of modulated waveform amplitude.
Press Mod → Type → ASK, the parameters of ASK modulation are shown in
Figure 2-53.
Figure 2-53 Setting Interface of ASK Modulation
Table 2-17 Menu Explanations of the ASK Parameters
Note:
Setting the parameters of ASK is similar to FSK. In addition, the external
modulating signal of ASK must comply with 5V CMOS level specifications.
82 SDG6000X User Manual
2.4.7 PSK
Function
Menu
Settings
Explanation
Type
PSK
Phase shift keying modulation
Source
Internal
The source is internal
External
The source is external signal from the [Aux In/Out]
connector at the rear panel
PSK Rate
Frequency at which the output phase shifts between the
carrier phase and carrier phase+180°.
Range: 1mHz~1MHz (internal source only)
Polarity
Positive
The modulating polarity
Negative
When using PSK (Phase Shift Keying), the generator shifts its output phase by
180° when the modulation source switches.
Press Mod → Type → PSK, the parameters of PSK modulation are shown in
Figure 2-54.
Figure 2-54 Setting Interface of PSK Modulation
Table 2-18 Menu Explanations of the PSK Parameters
To Set Polarity
Press Polarity to select the “Positive” or “Negative” of the modulating
waveform to control the output phase.
When internal modulation is selected, if the polarity is “positive”, logic low of
SDG6000X User Manual 83
the modulating waveform amplitude corresponds to carrier phase output and
logic high corresponds to modulating phase output; if the polarity is “negative”,
the situation is the opposite.
When external modulation is selected, if the polarity is “positive”, logic low of
the input corresponds to carrier phase output and logic high corresponds to
modulating phase output; if the polarity is “negative”, the situation is the
opposite.
Note:
The way of setting the parameters of PSK is similar to FSK. In addition, the
external modulating signal of PSK must comply with the 5V CMOS level
specification.
84 SDG6000X User Manual
2.4.8 PWM
Function
Menu
Settings
Explanation
Type
PWM
Pulse width modulation. The available carrier is pulse
Source
Internal
The source is internal
External
The source is external signal from the [Aux In/Out]
connector at the rear panel
Width Dev
The deviation from the carrier pulse width (only when
pulse width is the current parameter of the carrier)
Duty Dev
The deviation from the carrier duty cycle (only when duty
cycle is the current parameter of the carrier)
Shape
Sine
The modulating waveform
Square
Triangle
UpRamp
DnRamp
Noise
Arb
PWM Freq
Set the modulating waveform frequency. Frequency range:
1mHz~1MHz (internal source only)
In PWM (Pulse Width Modulation), the pulse width of the pulse varies with the
instantaneous voltage of the modulating waveform. The carrier can only be
pulse.
Press Waveforms → Pulse → Mod, the parameters of PWM modulation are
shown in Figure 2-55
Figure 2-55 Setting Interface of PWM Modulation
Table 2-19 Menu Explanations of the PWM Parameters
SDG6000X User Manual 85
To Select Modulation Source
The SDG6000X can accept a modulating signal from an internal or external
modulation source. Press Source to select “Internal” or “External” modulation
source. The default is “Internal”.
1. Internal Source
The way of setting internal source is similar to AM.
2. External Source
When external source is selected, width deviation (or duty cycle deviation) is
controlled by the signal level of the [Aux In/Out] connector at the rear panel. For
example, if the width deviation is set as 10 s, +6 V signal level corresponds to
10 s width change.
To Set Pulse Width/Duty Deviation
Press Width Dev (or Duty Dev) to highlight the parameter, and use the
numeric keyboard or arrow keys and knob to input the desired value.
Width Deviation represents the maximum variation of the modulated
waveform pulse width relative to the original pulse width.
The width deviation cannot exceed the current pulse width.
The width deviation is limited by the minimum pulse width and current
edge time setting.
Duty Deviation represents the maximum variation (%) of the modulated
waveform duty cycle relative to the original duty cycle.
The duty cycle deviation cannot exceed the current pulse duty cycle.
The duty cycle deviation is limited by the minimum duty cycle and current
edge time setting.
Duty deviation and width deviation are correlative. Once a parameter is
changed, the other will be automatically changed.
Note:
Setting parameters of PWM is similar to AM.
86 SDG6000X User Manual
2.5 To Set Sweep Function
Function
Menu
Settings
Explanation
Sweep time
The time span of the sweep in which the frequency
changes between the start frequency to stop frequency
Start Freq
Mid Freq
The start frequency of the sweep
The center frequency of the sweep
Stop Freq
Freq Span
The stop frequency of the sweep
The frequency span of the sweep
Source
Internal
Choose internal source as a trigger
External
Choose external source as a trigger
Use the [Aux In/Out] connector at the rear panel
Manual
Trigger a sweep by manual
Trig Out
Off
Disable trigger output
On
Enable trigger output
Page
1/2
Enter the next page
In sweep mode, the generator changes the output frequency between the start
frequency and the stop frequency in the sweep time specified by the user. The
waveforms that support sweep include sine, square, ramp and arbitrary.
Press Sweep key to enter the following menu. Set the waveform parameters
by using the operation menu.
Figure 2-56 Setting Interface of Sweep (Page 1/2)
Table 2-20 Menu Explanations of Sweep (Page 1/2)
SDG6000X User Manual 87
Function
Menu
Settings
Explanation
Type
Linear
Set the sweep with linear profile
Log
Set the sweep with logarithmic profile
Direction
Up
Sweep upward
Down
Sweep downward
Up_Down
Sweep upward, then downward (only when
sweep type is Linear)
Sym
The percentage that the time sweep upward
takes up the whole sweep time. (only when
Direction is Up_Down)
Page
2/2
Return to the previous page
Note: To select the secondary menu item, press the key a second time. For
example, if you wish to adjust the period of a waveform, press the softkey
below the “Frequency/Period” menu label until Period is highlighted and then
enter the value.
Figure 2-57 Setting Interface of Sweep (Page 2/2)
Table 2-21 Menu Explanations of Sweep (Page 2/2)
Sweep Frequency
Use start freq / stop freq or center freq / freq span to set the range of the
frequency sweep.
.
Start Frequency and Stop Frequency
Start Frequency and Stop Frequency are the lower and upper limits of the
88 SDG6000X User Manual
frequency for sweep. Start Frequency ≤ Stop Frequency.
Choose Direction → Up, the generator will sweep from Start frequency to
Stop frequency.
Choose Direction → Down, the generator will sweep from Stop frequency
to Start frequency.
Choose Direction → Up_Down, the generator will sweep from Start
frequency to Stop frequency, then from Stop frequency to Start frequency.
Center Frequency and Frequency Span
Center Frequency = (|Start Frequency + Stop Frequency|)/2
Frequency Span = Stop Frequency – Start Frequency
Sweep Type
SDG6000X provides “Linear” and “Log” sweep profiles and the default is
“Linear”.
Linear Sweep
In linear sweep, the output frequency of the instrument varies linearly in the
way of “a number of Hertz per second”. Choose Sweep → Page 1/2 → Type
→ Linear, there is a straight line displayed on the waveform on the screen,
indicating that the output frequency varies linearly.
SDG6000X User Manual 89
Figure 2-58 Linear Sweep Interface
Log Sweep
In log sweep, the output frequency of the instrument varies in a logarithmic
fashion. Choose Sweep → Page 1/2 → Type → Log, there is an exponential
function curve displayed on the waveform on the screen, indicating that the
output frequency changes in a logarithmic mode.
Figure 2-59 Log Sweep Interface
The formula below shows the relationship between frequency (f) and time (t) in
a logarithmic mode:
90 SDG6000X User Manual
Loading...