GRATTEN GA1022CAL User manual

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Terms in this manual. The following terms may appear in this manual:
Warning
The warning announcement points out the operation or condition that
may endanger the operators.
Notice
The notice announcement points out the operation or condition that
may cause damage to the product or other properties.
Terms on the product. The following terms may appear on the product:
Danger It represents that harms may be caused to you at once if you perform
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Warning It represents that latent harms may be caused to you if you perform
the operation.
Notice It represents the damage possibly caused to the product or other
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Characters on the product. The following characters may appear on the product：
Notice
Please read
the manual
Protective
ground terminal
Chassis
ground terminal
Measuring
ground terminal

Introduction to GA1000 series of digital
storage oscilloscope
GA1000 series of digital storage oscilloscope is small in size and flexible to operate. It
adopts a TFT LCD and a pop-up menu for display, and can remarkably improve the
working efficiency by its ease of use.
GA1000 oscilloscope has a real-time sampling rate as high as 2GSa/s, therefore it is
capable of catching complex and quickly changing signals. It supports storage of USB
equipment, and is capable of updating and upgrading the system software by a USB
flash disc.
GA1000 series of oscilloscope has excellent performance, various functions and
competitive cost to performance ratio.
Model Bandwidth Sampling Rate
GA1102CAL
100MHz 1GSa/s
GA1202CAL 200MHz 2GSa/s
GA1302CAL 300MHz 2GSa/s
Characteristics：
The oscilloscope has a totally new ultrathin appearance design, and is small in
size and more portable
A 7-inch widescreen color TFT LCD displays clear, crisp and more stable
waveform display
Storage/ Memory depth: single channel: 40Kpts; double channels: 20Kpts
Various trigger functions: Edge, Pulse, Video, Slope and Alternation
Unique digital filtering and waveform recording functions
Pass/Fail function
GA1022CAL 25MHz 1GSa/s
GA1042CAL 40MHz 1GSa/s
GA1062CAL 60MHz 1GSa/s

32 kinds of automatic measurement and manual cursor tracking measurement
functions
Two groups of reference waveforms, 16 groups of common waveforms, 20
groups of internal storage/output; support waveform setting, external storage
and output of CSV and bitmap file by USB flash disc (CSV and bitmaps cannot be
output from USB flash disc)
Adjustable waveform brightness and screen grid brightness
The pop-up menu display mode realizes more flexible and more natural for
users’ operations
Various kinds of language interface display, Chinese and English
On-line help system
Shortcut key PRINT, support print screen
Standard configuration interfaces: USB Host, USB Device, RS-232
USB Host: support storage of USB flash disc and upgrading of USB flash disc
system software
USB Device: support PC connection for remote communication;
GA1000 series of digital storage oscilloscope accessories:
User's manual
Product warranty card
Certificate of approval
1：1/10：1 probes(2 PCS ea)
Power cord satisfying the standard of the user's country
USB cable
CD (containing PC software GAScope1.0)

Content Summary
The manual introduces related information about the operation of this series of digital
oscilloscope and comprises the following chapters and sections:
Chapter “Introduction” introduces the front panel, the user interface, the function
check and the probe compensation of the oscilloscope.
Chapter “Function Introduction and Operation” systematically introduces the
function and operation of the oscilloscope in detail.
Chapter “Application Example” includes many measure examples offered for
reference for users.
Chapter “System Prompt and Fault Recovery” introduces the system prompts
and lists some simple faults and solutions so that the users are capable to
rectify simple faults.
Chapter “Service and Support” introduces the warranty and technical support of
this series of product.
Chapter “Appendix A: Technical Specification” introduces the technical
specification of this series of oscilloscope in detail.
Chapter “Appendix B: Default Setting” lists related factory settings.
Chapter “Appendix C: Daily Maintenance and Cleaning” introduces the way to
maintain the oscilloscope.

Catalogue
Chapter 1 Introduction………………………………………………………………………………………………………………………….…………1
1.1 Accidence of front panel and user interface ………….……………..………………..… 1
1.1.1 Front panel………………………………………………………………………………………………1
1.1.2 Back of instrument……………………………………………………………………….………4
1.2 Function check…………………………………………………………………………………………………5
1.3 Probe…………………………………………………………………………………………………………………6
1.3.1 Probe safety……………………………………………………………………………………………6
1.3.2 Probe attenuator setting…………………………………………..……….…………………6
1.3.3 Probe compensation……………………………………………………..………………………7
Chapter 2 Function Introduction and Operation……………………..………9
2.1 Menu and control button…………………………………………………………………….………………9
2.2 Connector…………………………………………………………………………………….………………………11
2.3 Default setting………………………………………………………………………………….…………………12
2.4 [Universal] knob………………………………………………………….………………………………………13
2.5 Vertical system……………………………………………………………………………………………………14
2.5.1 Channels CH1 and CH2……………………………………………………………….……………14
2.5.2 Application of [POSITION] and [VOLT/DIV] knobs of the vertical system
……………………………………………………………………………………………………………………………….20
2.5.3 Implementation of MATH function…………………………………………………………20
2.5.4 Implementation of REF function………………………………….…….……………………27
2.6 Horizontal system……………………………….……………………………………………………………29
2.6.1 Horizontal control knob…………………………………………………………..………………30

2.6.2 Window expansion………………………………………….…………………………………………31
2.7 Triggering system………………………………………………………………………………………………32
2.7.1 Signal source………………………………………………………………………………………………33
2.7.2 Type……………………………………………………………………………………………………………33
2.7.3 Coupling……………………………………………………………………………………………………42
2.7.4 Trigger hold-off…………………………………………………….……………………………………42
2.8 Signal acquisition system…………………………………………………………………………………44
2.9 Display system……………………………………………………………………………………………………48
2.9.1 X-Y mode………………………………………………………………..………………………………50
2.10 Measurement system…………………………………………………………………………………………52
2.10.1 Scale measurement……………………………………………….………………………………52
2.10.2 Cursor measurement…………………………………………….………………………………52
2.10.3 Measurement…………………………………………….…………………………………………56
2.11 Storage system……………………………………………………………..……………………………………63
2.12 Auxiliary system…………………………………………………………………………………………………69
2.12.1 System status…………………………………………………………………………………………71
2.12.2 Language selection…………………………………………………………………………………71
2.12.3 Self correction…………………………………………………………………………………………72
2.12.4 Self test……………………………………………………………………………………………………72
2.12.5 Firmware upgrading………………………………………………………………………………74
2.12.6 Test passed………………………………………………………………………………………………74
2.12.7 Waveform recording………………………………………………………………………………78
2.12.8 Interface setting……………………………………………………………………………………80
2.13 Help function……………………………………………………………………………………………………81

Chapter 3 Application Examples…………………………………………………………………………………………82
3.1 Simple Measurement……………………………………………………………………………………………82
3.2 Cursor Measurement……………………………………………………………………………………………84
3.2.1 Measurement of width of spike pulse……………………………………………………84
3.2.2 Measurement of amplitude of spike pulse……………………………………………84
3.3 Single signal catching……………………………………………………………………………………86
3.4 Detailed information of analysis signal………………………………………………………87
3.4.1 Noise signal observation…………………………………………………………………………87
3.4.2 Separation of signal from noise…………………………………………………………87
3.5 Application of X-Y function………………………………………………………………………88
3.6 Application of arithmetical operation in communication signal difference
analysis…………………………………………………………………………………………………………………90
3.7 Screen capture………………………………………………………………………………………………………91
Chapter 4 System prompt and Fault Recovery…………………….………..……………92
4.1 System prompt message description………………………………………………………………92
4.2 Fault troubleshooting…………………………………………………………………………………………94
Chapter 5 Service and Support…………………………………………………………….……………………………………………96
5.1 Maintain summary……………………………………………………………………………………..………96
Chapter 6 Appendix…………………………………………………………………………………………………………………………………………97
Appendix A: Technical specification……………………………………………………………………97
Appendix B: Default setting…………………………………………………………………………………102

Appendix C: Daily maintenance and cleaning…………..…………………………………………106

1
This series of digital storage oscilloscope is a
small and light portable instrument that can be
measured by a ground voltage as reference.
This chapter introduces how to implement the
following tasks:
Accidence of front panel and user interface
Implement brief function checks
Match probe attenuation coefficients
Implement probe compensation
DIGITAL STORAGE OSCILLOSCOPE
Introduction

1
1.1 Accidence of front panel and the user
interface
This section will make you understand the front operation panel of this series of digital
oscilloscope at first before use.
The content below simply describes and introduces the front panel and the back part
of this series of digital oscilloscope so that you can know this series of digital
oscilloscope well within the shortest time.
1.1.1 Front panel
This series of digital oscilloscope has a front panel that is simple but clear in function,
and is convenient for a user to finish basic operations. Knobs and functional keys are
arranged on the panel. Five grey keys which have been arranged in a row on the left
side of a display screen are option keys. The current menu can be provided with
different options. The other keys are function keys that can be set in different
functional menus or directly obtain specific function application. The knobs can be
used for quickly regulating the corresponding setups of the oscilloscope.
Attention: in this specifications, 【】represents the keys and knobs of the oscilloscope,
and ‘‘’’ represents the menu options displayed in a program interface.
Power Button USB Port Menu On/Off Input Channel
for Analog Signal
External
Trigger Terminal
Function Keys
Print Screen
Universal Knob
Menu Controls
Auto Setup
Advanced Trigger
ControlsHorizontal Controls
Vertical Controls
Probe Compensation Signal
Output Terminal/ Ground
Terminal
Figure 1-1 Figure of Front Panel controls

①②③
④⑤
⑦
⑥
⑧⑨ ⑩ ⑪⑫⑬⑭⑮
Figure 1-2 Interface display
No. Details
①Trigger status
Armed: The oscilloscope is acquiring pre-triggering data. All triggers are ignored
in this state.
Ready: The oscilloscope has acquired all the pre-triggering data and is ready to
accept a trigger.
Trig’d: The oscilloscope has caught a single trigger and acquires the data after
triggering.
Stop: The oscilloscope has stopped acquiring waveform data.
Auto: The oscilloscope is at an auto mode and acquires the waveform at a
non-triggered state.
Scan: The oscilloscope continuously acquires and displays the waveform at a
scan mode.
2

The reading displays the setup of a main time base.
②
It displays a time reading from the central scale.
③
④The identifier displays the horizontal trigger position.
The horizontal [POSITION] knob is used for regulating the horizontal trigger
position
It represents the oscilloscope is connected to a computer
⑤
⑥The identifier displays a zero electrical level standard point of the channel
waveform.
The identifier is displayed only when the channel is open
The identifier displays a trigger electrical level
⑦
The identifier displays bandwidth limit of the channel.
⑧
The identifier displays coupling mode of the channel.
⑨
The reading displays vertical scale coefficient of the channel.
⑩
The identifier displays inverse phase of waveform of the channel.
⑪
The reading displays counting frequency of a frequency meter.
⑫
It displays a trigger source selected at present.
⑬
The icondisplays a selected trigger type.
⑭
The reading displays a set trigger electrical level value.
⑮
3

4
1.1.2 Instrument back
This series of digital oscilloscope provides various standard interfaces, as shown in
the figure below :
4
1 2 3
1. Pass/Fail output port: output a Pass/Fail detection pulse
2. RS-232 interface: connect test software or waveform printing (a bit slow)
3. USB Device interface: connect test software or waveform printing (quick)
4. Power input interface: input a three-pin power supply

1.2 Function check
Carry out a quick function check to check whether the oscilloscope works normally
according to the following steps:
1. Turn on the power source, and set the default attenuation as 1× according to the
probe option [DEFAULT setup].
2. Set a switch on a probe of the oscilloscope as ×1 and connect the probe with a
connector CH1BNC of the oscilloscope. Connect a hook-shaped head of the probe
to a probe compensation signal connector marked with ‘‘1KHz’’, and clamp a
grounding hook marked with “GND” by a grounding clamp, as shown in the figure
below:
Figure 1-4 Function detection
3．Press [AUTO]. Within few seconds, CH1 displays a square wave of which the
frequency is 1kHz and the peak-to-peak voltage value is 3V.
Figure 1-5 Probe compensation signal
4. Connect the probe with channel 2, and CH2 displays the same waveform after [AUTO]
is pressed.
5