GRATTEN GA1022CAL, GA1042CAL, GA1202CAL, GA1302CAL, GA1062CAL User Manual

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The content of this manual is based on the current production models. As a
progressive company we pursue a policy of continuous product development and
improvement. Thus the content and operational procedure in this manual could be
changed without prior notice.

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© 2012 NANJING GLARUN-ATTEN TECHNOLOGY CO. LTD All Rights Reserved.

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is the registered trademark of NANJING GLARUN-ATTEN
TECHNOLOGY CO. LTD.

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People's Republic of China Patent that has been approved or is
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manuals) as well as translate the content into other languages
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TECHNOLOGY CO. LTD.

Security terms and characters

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

the operation.

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

properties if you perform the operation.

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

④

⑤

⑦

⑥

⑧⑨ ⑩ ⑪⑫⑬⑭⑮

Figure 1-2 Interface display

No. Details

①

Tri

gger 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 r

eading displays the setup of a main time base.

②

It disp

la

ys a time reading from the central scale.

③

④

The 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

⑥

The identifier displays a zero electrical level standard point of the channel

waveform.

The identifier is displayed only when the channel is open

The identif

ier displays a trigger electrical level

⑦

The iden

tifier displays bandwidth limit of the channel.

⑧

The iden

tifier displays coupling mode of the channel.

⑨

The re

ading displays vertical scale coefficient of the channel.

⑩

The ide

n

tifier displays inverse phase of waveform of the channel.

⑪

The r

e

ading displays counting frequency of a frequency meter.

⑫

It disp

la

ys a trigger source selected at present.

⑬

The ico

n

displays a selected trigger type.

⑭

The read

ing 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

1.3 Probe

1.3.1 Probe safety

Check and obey the rated values of the probe parameters before using it.

A protective cover surrounding the probe main body can prevent fingers from electric

shock.

Probe protective

device

Fi

gure 1-6 Probe

Connect the probe to the oscilloscope and ground the ground terminal before any

measurement.

Attention:

 Keep fingers behind the protective curve on the probe main body to prevent electric shock

when using the probe.

 Do not contact the metal part on the top of the probe when the probe is connected to a voltage

source.

 The signal measured by the oscilloscope uses ‘‘ground ’’ as reference voltage, and the ground

terminal should be grounded correctly to prevent short circuit.

1.3.2 Probe attenuation setting

The probe has different attenuation coefficients that influence the vertical scale of the

signal. The “ATTENUATION” switch on the probe is ensured to be matched with the

“PROBE” coefficients in the oscilloscope.

Manually set the probe options, press down the vertical menu key, and then select the

“PROBE” option (such as [CH1] →“PROBE”).

6

7

● Default setup of the probe optical is 1X.

● When the “ATTENUATION” switch is set as ×1, the probe limits the bandwidth of the

oscilloscope within 0-10 MHz (different probes have different specifications).

Ensure that the switch is set to be ×10 when to use the full bandwidth of the

oscilloscope.

1.3.3 Probe compensation

Carry out probe compensation when the probe connect the channel for the first time so

as to match the probe with the channel. Under compensation or Over compensation of

the probe may cause measurement errors or mistakes.

Figure 1-7 Probe compensation connection figure

1． Set the probe coefficient to 10X in channel menu, set the switch on the probe to ×10,

and connect the probe of the oscilloscope with channel 1.

2． Connect the end part of the probe to the probe compensation connector “1KHz”,

clamping the connector “GND” by the ground clamp, turn on the channel displayer,

and then press [AUTO] to display the waveform.

3． Check the shape of the di

splayed waveform.

under compensated suitable compensated over compensated

4． If necessary, rotate the adjustable capacitor on the probe handle to realize suitable

compensated.

8

2

This chapter introduces the functional keys and

operations of the front panel of the series of

oscilloscope in detail.

For effectively using the oscilloscope, the

following functions of the oscilloscope are needed

to be known:

 Menu and control keys
 Connector
 Automatic setup
 Default setup
 “Universal” knob
 Vertical system
 Horizontal system
 Triggering system
 Signal acquisition system
 Display system
 Measurement system
 Save system
 Auxiliary system
 On-line help system

DIGITAL STORAGE OSCILLOSCOPE

Function Introduction
and Operation

9

2.1 Menu and control keys

As shown in the figure below :

Figure 2-1 Control keys

All the keys are described as follows:

 [CH1], [CH2]: display setup menus of channel 1 and channel 2.

 [MATH]: display “ARITHMETICAL OPERATION” function menu.

 [REF]: display “REFERENCE WAVEFORM” menu.

 [HORI MENU]: display “HORIZONTAL” menu.

 [TRIG MENU]: display “TRIGGER” control menu.

 [SET TO 50%]: set the trigger electric level as midpoint of the signal amplitude.

 [FORCE]: It is used for finishing acquisition of the current waveform no matter

whether the oscilloscope detects trigger, and it is mainly applied to “NORMAL”

and “SINGLE” in the trigger mode.

 [SAVE/RECALL]: display the “SAVE/RECALL” menu of setups and waveform.

 [ACQUIRE]: display the “ACQUIRE” menu.

 [MEASURE]: display the “MEASURE” menu.

 [CURSORS]: display the “CURSOR” menu. The [UNIVERSAL] knob can be used for

regulating the position of the cursor when the “CURSOR” menu is displayed and

the cursor is triggered.

10

 [DISPLAY]: show the “DISPLAY” menu.

 [UTILITY]: display “AUXILIARY FUNCTION” menu.

 [DEFAULT SETUP]: recall the default factory setup.

 [HELP]: enter the on-line help system.

 [AUTO]: automatically set the control state of the oscilloscope so as to display

suitable waveform.

 [RUN/STOP]: continuously acquire waveform or stop acquisition

 [SINGLE]: Acquire a single trigger, finish acquisition and then stop.

11

2.2 Connector

Figure 2-2 Connector

 CH1, CH2: for an input connector of a measured signal.

 EXT TRIG: be used as an input connector of an external trigger source. Use [TRIG

MENU] to select “EXT” or “EXT/5” trigger source, and the trigger signal source

can be used for triggering in the third channel while acquiring data in two

channels.

 Probe compensation: The probe compensation signal is output and grounded so

that the probe is matched with the channels of the oscilloscope.

 This product is grounded by a protective ground wire of a power cord. For avoiding electric

shock, please ensure that the product is reliably grounded before connecting the input end

or output end of the product.

 The ground wire of the probe is connected to the ground only. Please do not connect the

ground wire to high voltage.

12

2.3 Default setups

The default setups represent some option parameters that are set before the

oscilloscope leaves factory for normal operations.

Figure 2-3 Default setup key

The [DEFAULT SETUP] key represents the default setup function, most of the options

and control setups of the factory are recalled by pressing them, some setups are not

changed, and the following setups are not reset:

 Language options

 Saved standard waveforms

 Saved setup files

 Contrast ratio of display screen

 Calibration data

Default setup

13

2.4 UNIVERSAL knob

Figure 2-4 Universal knob

This series of digital storage oscilloscope has a special knob-[UNIVERSAL] knob by

which the hold-off time, cursor measurement, pulse width setup, specified row in video

trigger, upper limit and lower limit of filter frequency, horizontal tolerance range and

vertical tolerance range for regulating PASS/FAIL function, waveform frame number

recording and playback in waveform recording function and the like can be changed.

The options for most of the menus can be selected by rotating the [UNIVERSAL] knob.

Universal knob