East Tester ET3325 User manual

ET3325 Function/ Arbitrary Waveform Generator
User Manual
HANGZHOU ZHONGCHUANG ELECTRON CO., LTD

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Contents
Introduction to ET3325 Function/ Arbitrary Waveform Generator.................................................3
Key Features........................................................................................................................................3
Product Model..................................................................................................................................... 3
1. Quick Start.......................................................................................................................................4
1.1 Introduction to Front and Rear Panels.................................................................................. 4
1.2 Introduction to Interface........................................................................................................4
1.3 Waveform Setup.................................................................................................................... 5
1.4 Output Setup..........................................................................................................................7
1.5 Modulation/Frequency Sweep/Burst Output Setup.............................................................. 7
1.6 Introduction to Digital Input................................................................................................. 8
1.7 Introduction to Functions of Frequency Meter/System Setup/Help.....................................9
2. Advanced Operation Instructions....................................................................................................9
2.1 Basic Waveform Setup........................................................................................................ 10
2.1.1 Sine wave setup........................................................................................................10
2.1.2 Square wave setup....................................................................................................13
2.1.3 Set ramp wave.......................................................................................................... 15
2.1.4 Set pulse wave..........................................................................................................17
2.1.5 Set noise wave..........................................................................................................19
2.1.6 Set arbitrary wave.................................................................................................... 20
2.2 Modulation Waveform Setup.............................................................................................. 28
2.2.1 Amplitude Modulation (AM)................................................................................... 28
2.2.2 Frequency Modulation (FM)....................................................................................30
2.2.3 Phase Modulation (PM)........................................................................................... 31
2.2.4 Amplitude Shift Keying (ASK)............................................................................... 33
2.2.5 Frequency Shift Keying (FSK)................................................................................ 34
2.2.6 Phase Shift Keying (PSK)........................................................................................35
2.3 Frequency Sweep Waveform Setup.................................................................................... 37
2.4 Burst Waveform Setup........................................................................................................ 39
2.5 Sync Output (CH1)..............................................................................................................42
2.6 Frequency Meter................................................................................................................. 43
2.7 Assist System Function Setup............................................................................................. 44
2.7.1 Channel 1/2 output parameter setup........................................................................ 44
2.7.2 System setup.............................................................................................................45
2.7.3 File storage............................................................................................................... 46
2.7.4 Interface....................................................................................................................50
2.7.5 Calibration................................................................................................................50
2.7.6 System upgrade........................................................................................................ 50
2.7.7 System information.................................................................................................. 51
2.8 Help..................................................................................................................................... 51
2.9 Telecommunication............................................................................................................. 52
2.9.1 Establishment of communication between instrument and the PC......................... 52
3. Technical Specifications................................................................................................................53

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3.1 Product Technical Indicators...............................................................................................53
3.2 General Technical Specifications........................................................................................ 59
4.Appendices................................................................................................................................59
Appendix A: Accessories.......................................................................................................... 59
Appendix B: Maintenance and Cleaning.................................................................................. 60

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Introduction to ET3325 Function/ Arbitrary Waveform
Generator
ET3325 function/arbitrary waveform generator is equipped with direct digital synthesis (DDS)
technology which enables output signal to be stable and accurate.
Instrument output channel sets CH1 channel output and CH2 channel output. CH1 channel is
major output channel for output of all the following functions; CH2 channel is an auxiliary
channel for output of basic waveform and arbitrary wave.
Key Features
3.5-inch 480×320TFT LCD with clear graphic interface
Chinese / English menu available
Press key for help and information
File management supporting USB flash disk and local storage
ET3325 output with the highest output frequency is ET3310 Model is 10MHz, ET3325
Model is 25MHz,ET3340 Model is 40MHz, ET3360 Model is 60MHz and ET 3370
Model is 70MHz.
Sampling rate: 160MSa/S, vertical resolution: 12 bit and storage depth: 16k
5 basic waveforms and 32 arbitrary waveforms in-built
Pulse wave output set in edge time
Internal/external AM, FM, PM, ASK, FSK and PSK modulation function
Output of linear/logarithmic frequency sweep and burst waveform
Frequency meter of high precision of 200MHz
With RS232 interface, USB Device, USB Host interface supporting USB flash disk
storage
Multi-functional arbitrary waveform editing software equipped
Product Model
has ET3360 models, namelyET3310, ET3325, ET3340, ET3360 and ET3370. The manual takes
ET3340 as an example, in which specifications have covered all the functions and performances of
ET3325.

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1. Quick Start
1.1 Introduction to Front and Rear Panels
This section describes front and rear panels of for your quick understanding of function and
usage.
Front panel includes liquid crystal, keys and output terminal and so on. Keys include:
Function/mode, reusable keys, numeric keys and direction keys/knobs.
Figure 1-1 Front panel
The rear panel consists of input terminal, communication interface and power interface.
Figure 1-2 Rear Panel
1.2 Introduction to Interface

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Basic operation interface is shown in Figure 1-3.
Figure 1-3 Interface
1.3 Waveform Setup
There is a series of keys with waveform displaying on the right of the operation panel, which are
sine wave, square wave, ramp wave, pulse wave, noise wave and arbitrary wave. There is a
common key as well: switch of CH1/CH2 channels.
The following routine will guide you gradually familiar with the setup of these keys.
Waveform keys Channel switch
Figure 1-4 Key Selection
1. Press , waveform display area will turn to sine signal and show Sine in the status area.
Sine waves of different parameter values are accessible through the setup of frequency/cycle,
amplitude/high-level, offset/low-level and phase.
2. Press , waveform display area will turn to square signal and show Square in the status
area. Square waves of different parameter values are accessible through the setup of
frequency/cycle, amplitude/high level, offset/low level, duty cycle and phase.
3. Press , waveform display area will turn to ramp signal and show Ramp in the status
area. Ramp waves of different parameter values are accessible through the setup of
frequency/cycle, amplitude/high-level, offset/low-level, symmetry and phase.

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4. Press , waveform display area will turn to pulse signal and show Pulse in the status
area. Pulse waves of different parameter values are accessible through the setup of frequency/cycle,
amplitude/high-level, offset/low-level, symmetry and rising/trailing edge.
5. Press , waveform display area will turn to noise signal and show Noise in the status
area. Noise waves of different parameter values are accessible through the setup of amplitude/high
level and offset/low level.
6. Press , waveform display area will turn to arbitrary signal and show Arb in the status
area. Arbitrary waves of different parameter values are accessible through the setup of
frequency/cycle, amplitude/high-level, offset/low-level and phase.
7. Press to switch channels. The selected channel is for parameter setup.
Background color of liquid crystal changes in compliance with the switch of channels.

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1.4 Output Setup
As shown in Figure 1-5, there are ET3325 Output keys at the bottom right of the front panel for
channel output control andET3310 Trig key for trigger output. The following examples will offer
you guidance on these functions.
Figure 1-5 Channel Output
1. Press Output to start or forbid output signal of output connector in the front panel. The
channel pressed Output displays ON and is lit.
2. When sweep and burst output, if Channel 1 is in output status and trigger is manual, trigger
outputs signal for once if pressing the trigger key. For non-manual trigger, manual trigger
would realized by pressing the trigger key.
1.5 Modulation/Frequency Sweep/Burst Output Setup
ET3340 keys on the right side of waveform are for the output of modulation, frequency sweep and
burst respectively, which function is for Channel 1 only. The following specifications will offer
you guidance on the setup of these functions.
Figure 1-6 Keys of Modulation/Frequency Sweep/Burst
1. Press to output modulated waveform. Change output waveform through the
change in parameters such as type, internal modulation/external modulation, depth, frequency and

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modulated wave.
Modulation types include AM, FM, PM, ASK, FSK and PSK. Modulating signals include sine
wave, square wave, ramp wave, up-ramp and down-ramp.
2. Press to conduct frequency sweep on sine wave, square wave, ramp wave, pulse
wave or arbitrary waveform.
In the frequency sweep mode, the frequency of output waveform is in constant change from the
start frequency to the stop frequency at a sweep rate.
3. Press and it will generate burst waveform of sine wave, square wave, ramp wave,
pulse wave or arbitrary waveform.
1.6 Introduction to Digital Input
As shown in Figure 1-7, ET3325 sets of keys are on the front panel, which are numeric keypad,
left-right direction keys and knobs and confirmation/cancellation key. The following specifications
will offer you guidance on the use of digital input.
Figure 1-7 Numeric keypads, direction keys and knobs and confirmation/cancellation key
Direction keys
Switch of digits and system setup interface for menu selection. The left key is applicable to
backspace under numeric keypad input.
Knobs
Digit Alternation. Make a clockwise rotation to plus 1 and an anticlockwise ONE/10MHZ to
minus 1 if the change is within the range of 0~9.
Switch of internal waveform type, system setup interface for selection of menu and characters
input of file name.
Numeric keypad
Input the desired value directly and alter the size of parameters.

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1.7 Introduction to Functions of Frequency Meter/System
Setup/Help
As shown in Figure 1-8, ET3340 keys are below keys of modulation/frequency sweep/burst on
the front panel to set frequency meter, system setup and help respectively. The following
specifications will offer you guidance on the setup of these functions.
Figure 1-8 Keys of Frequency Meter/System Setup/Help
1. Press to check the current measured value of the frequency meter.
2. Press to set output parameters of Channel 1 and 2, buzzer switch, language switch,
file storage, interface information and system information; execute instrument calibration and
system update.
3. Press to check assistance information list.
2. Advanced Operation Instructions
You have acquired preliminary knowledge on the functions of keys and knobs of all functional
areas on the front panel of ET3340 and are able to make basic operation on function/arbitrary
waveform generator through previous introduction.
This section is introduction to basic waveform setup, arbitrary waveform setup, modulating
waveform setup, frequency sweep waveform setup, burst waveform output, and use of frequency
meter, system function setup and assistance in use.

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2.1 Basic Waveform Setup
2.1.1 Sine wave setup
Press and operation menu of sine wave will be displayed at the bottom of the screen.
Channel basic information is displayed on the upper left, including channel switch, output
impedance and name of current waveform. Set output waveform of sine wave through its
operation menu.
Parameters of setup sine wave include frequency/cycle, amplitude/high-level, offset/low-level and
phase. Different sine waves are obtained through alteration of these parameters. As shown in
Figure 2-1, select Frequency in the operation menu and cursor will be in the location of frequency
parameter in the parameter display area, in which user could alter the frequency value of sine
wave through numeric keypad, direction keys or knobs.
Figure 2-1 Display Interface of Setup of Sine Wave Parameters
Table 2-1 Sine Waveform Menu Description
Functional menu
Setup
Description
Frequency/cycle
——
Set waveform frequency or cycle
Amplitude/high-level
——
Set waveform amplitude or
high-level
Offset/low-level
——
Set waveform offset or low-level
Phase
——
Set initial phase of sine wave
Note: 1. The in-phase in the operation menu is applicable to the synchronization in
TWO/25MHZ-channel output only. It is unnecessary for single-channel waveform.
2. The “——” in setup column represents no setup item, hereinafter inclusive.
Set output frequency/cycle

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1. Press →frequency to set frequency parameter value.
The displayed frequency is either the power-on default value or the frequency previously selected.,
Use the current value if the frequency value is valid for the new waveform when changing
parameters. To set waveform cycle, press the softkey of Frequency once again and switch to the
Cycle softkey (current option is in inverse display).
2. Enter the desired frequency value.
Use the numeric keypad to enter the desired parameter value. Select the unit desired by frequency
and press the softkey corresponding to the desired units. Or use left-right key to specify the digit
of parameter value to be amended and use knobs to alter the digit.
Figure 2-2 Input Frequency Parameters
Note:
To input value through numeric keypad, use left direction key for backspace to delete
previous digit; press the cancellation key to cancel digit input for misoperation.
To input value through knobs, use direction keys to alter the digit with the subscript of
horizontal bar for tracking. Then turn the knob to alter the digit to obtain the desired value.
Set output amplitude
1. Press →amplitude to set the parameter value of amplitude.
The displayed amplitude is either the power-on default value or the amplitude previously selected.
Use the current value if the amplitude is valid for the new waveform when changing parameters.
To use high/low level to set amplitude, press the softkey of Amplitude or Offset once again and
switch to the softkey of High-level and Low-level (current option is in inverse display).
2. Enter the desired amplitude
Use numeric keypad or knobs to enter the desired parameter value. Select the unit desired by
amplitude and press the softkey corresponding to the desired unit.

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Figure 2-3 Setup Parameter Value of Amplitude
Note:
The maximum amplitude will turn to 5Vpp if frequency is higher than 20MHz under 50Ωoutput.
Set offset voltage
1. Press →offset to set parameter value of offset voltage.
The displayed offset voltage is either the power-on default value or the offset previously selected.
Use the current value if the offset is valid for the new waveform when changing parameters.
2. Enter the desired amplitude
Use numeric keypad or knobs to enter the desired parameter value. Select the unit desired by
offset and press the softkey corresponding to the desired unit.
Figure 2-4 Setup Parameter Value of Offset

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Set initial phase
1. Press →phase to set parameter value of initial phase.
The displayed initial phase is either the power-on default value or the phase previously selected.
Use the current value if the phase is valid for the new waveform when changing parameters.
2. Enter the desired amplitude
Use numeric keypad or knobs to enter the desired value and then select the unit.
Figure 2-5 Setup Parameter Value of Initial Phase
2.1.2 Square wave setup
Press and the operation menu of square wave will be displayed at the bottom of the
screen. Use operation menu of square wave to set its output waveform parameters.
Major parameters of square wave include frequency/cycle, amplitude/high level, offset/low level,
duty cycle and phase. Different square waves are obtained by altering these parameters. As shown
in Figure 2-6, select duty cycle in the menu of softkey and the parameter value corresponding to
duty cycle will be selected in the parameter display area, in which users could alter the value of
duty cycle of square wave.

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Figure 2-6 Display Interface of Setup of Square Wave Parameters
Table 2-2 Square Waveform Menu Description
Functional Menu
Setup
Description
Frequency/cycle
——
Set waveform frequency or
cycle
Amplitude/high-level
——
Set waveform amplitude or
high-level
Offset/low-level
——
Set waveform offset or
low-level
Duty cycle
——
Set duty cycle of square wave
Phase
——
Set initial phase of waveform
Note:
Duty cycle: the percentage of square wave high level in the whole cycle.
≤100kHz: 1%~99%
100 kHz~5MHz: 20%~80%
5MHz~10MHz: 40%~60%
Set duty cycle
1. Press →duty cycle to set the parameter value of duty cycle.
The displayed duty cycle is either the power-on default value or the value previously selected. Use
the current value if it is valid for the new waveform when changing parameters.
2. Enter the desired duty cycle
Use numeric keypad or knobs to enter the desired parameter value. Select the unit desired by duty
cycle and press the softkey corresponding to the desired unit. Signal generator will immediately
adjust duty cycle and output square wave in the desired value.

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Figure 2-7 Setup Parameter Value of Duty Cycle
2.1.3 Set ramp wave
Press and the operation menu of ramp wave will be displayed at the bottom of the
screen. Use operation menu of ramp wave to set its output waveform parameters.
Major parameters of ramp wave include frequency/cycle, amplitude/high level, offset/low level,
symmetry and phase. Different ramp waves are obtained by altering these parameters. As shown in
Figure 2-8, select Symmetry in the menu of softkey and the parameter value corresponding to
symmetry will be selected in the parameter display area, in which users could alter the value of
symmetry of ramp wave.

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Figure 2-8 Display Interface of Setup of Parameter Values of Ramp Waveform
Table 2-3 Ramp Waveform Menu Description
Functional menu
Setup
Description
Frequency/cycle
——
Set waveform frequency or
cycle
Amplitude/high-level
——
Set waveform amplitude or
high-level
Offset/low-level
——
Set waveform offset or
low-level
Symmetry
——
Set symmetry of ramp wave
Phase
——
Set initial phase of waveform
Note:
Symmetry: the percentage of setup ramp waveform in rise in the whole cycle.
Range: 0~100%
Set symmetry
1. Press →symmetry to set parameter value of symmetry.
The displayed symmetry is either the power-on value or the percentage previously selected. Use
the current value if it is valid for the new waveform when changing parameters.
2. Enter the desired symmetry
Use numeric keypad or knobs to enter the desired parameter value. Select the unit desired by
symmetry and press the softkey corresponding to the desired unit. Signal generator will
immediately adjust symmetry and output ramp wave in the desired value.

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Figure 2-9 Setup parameter value of symmetry
2.1.4 Set pulse wave
Press and the operation menu of pulse wave will be displayed at the bottom of the
screen. Use operation menu of pulse wave to set its output waveform parameters.
Major parameters of pulse wave include frequency/cycle, amplitude/high-level, offset/low-level,
pulse width/duty cycle and rising edge/falling edge. Different pulse waves are obtained by altering
these parameters. Specific interface is shown in Figure 2-10
Figure 2-10 Interface for Setup of Pulse Waveform Parameters

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Table 2-4 Pulse waveform menu description
Functional menu
Setup
Description
Frequency/cycle
——
Set waveform frequency or
cycle
Amplitude/high-level
——
Set waveform amplitude or
high level
Offset/low-level
——
Set waveform offset or
low-level
Duty cycle/pulse width
——
Set duty cycle or pulse width
of pulse wave
Rising edge/falling edge
——
Set rising and falling edge of
waveform
Note:
Pulse width: it represents the interval time from the 50% threshold value in the range of rising
edge and to the 50% threshold value in the range of next falling edge.
Set pulse width
1. Press →duty cycle/pulse width→pulse width.
The displayed pulse width on screen is either the power-on default value or the pulse width
previously selected. Use the current value if it is valid for the new waveform when changing
parameters.
2. Enter the desired pulse width.
Use numeric keypad or knobs to enter the desired parameter value. Select the unit desired by pulse
width and press the softkey corresponding to the desired unit. Signal generator will immediately
adjust pulse width and output pulse wave in the desired value.
Figure 2-11 Setup Parameter Value of Pulse Width

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Note:
1. Pulse width is restricted by minimum pulse width and pulse period
Minimum pulse width: 20ns;
Pulse width ≥minimum pulse width;
Pulse width ≤pulse period-minimum pulse width
2. Pulse duty cycle is restricted to minimum pulse width and pulse period
Pulse duty cycle ≥100 ×minimum pulse width ÷pulse period
Pulse duty cycle ≤100 ×(1- minimum pulse width ÷pulse period)
3. Pulse width is pertinent to the setup of duty cycle
ONE/10MHZ will vary based on the variation of the other. For example, current cycle is 1ms,
pulse is 500us and duty cycle is 50%, duty cycle will turn to 20% after pulse width is set to 200us.
Set rising/falling edge
1. Press →leading edge.
2. Enter the desired pulse rising edge.
3. Press →rising /falling edge→falling edge.
4. Enter the desired pulse falling edge.
2.1.5 Set noise wave
Press and the operation menu of noise wave will be displayed at the bottom of the
screen. Use operation menu of noise wave to set its output waveform parameters.
Major parameters of noise wave include: amplitude/high level and offset/low level. Different noise
waves are obtained by altering these parameters. Noise is random signal without frequency and
periodicity. Specific interface is shown in Figure 2-12.