ds203 user’s manual . 8 ix application example .9 1. example 1 measure simple signals 9 2. example...

29
DS203 USER’S MANUAL

Upload: phamliem

Post on 29-Mar-2018

239 views

Category:

Documents


11 download

TRANSCRIPT

DS203

USER’S MANUAL

2

Contents

I Product Intro………………………………………………………………………………………..…….2

II General Safety Rules ……………………………………………………………………………….. 2

III Major Functions ……………………………………………………………………………………..2

IV Operation Precautions …………………………………………………………………………………..2

V General Inspection …………………………………………………………………………………. 3

VI Functional Inspection................................................................................................................................ 3

VII Firmware Upgrade …………………………………………………………………………………….3

VIII Oscilloscope Familiarization…………………………………………………………………………. 4

1. Interface and Buttons…………………………………………………………………………………4

2. Screen………………………………………………………………………………………………5

2.1.Parameters…………………………………………………………………………………………5

2.2.Functions of Channel Area…………………………………………………………………………6

2.3.Functions of Detection Area…………………………………………………………………….7

2.4.Menus…………………………………………………………………………………………. 8

IX Application Example…………………………………………………………………………………….9

1. Example 1 Measure simple signals…………………………………………………………………9

2. Example 2 Acquire a single signal…………………………………………………………………9

3. Example 3 Measure with Cursors…………………………………………………………………10

4. Example 4 Compare waveforms……………………………………………………………………11

5. Example 5 Save waveform images…………………………………………………………………12

X Operation Tips…………………………………………………………………………………………13

3

I Product Intro

DS203 is a 5-trace 4-channel digital oscilloscope for common electronic engineering tasks. Its CPU is

based on ARM Cortex M3, adopting FPGA to manage the control & data buffering of ADC. A built-in 2MB USB

disk enables users to store waveforms & upgrade firmware. It also provides 4 application areas, convenient for

users to load & upgrade at most 4 kinds of application firmware.

II General Safety Rules

To ensure your safety & avoid any damage to the device/connected products, please read the following

precautions carefully. To avoid any possible dangers, please use this product according to the rules.

Avoid fire & physical injury.

Use appropriate power cord. Please use dedicated power cord which is certified in the country/region.

Connect & disconnect properly. Do not plug/unplug when the probe(s)/test lead(s) is connected to the

voltage source. Before you plug/unplug current probes, please disconnect power to the circuit-under-test.

Observe all terminal ratings. To avoid fire/electric shock, please observe ratings & symbols on the

product. Please read the user’s manual carefully to know detailed info of the ratings before connecting the device.

Do not operate in humid environment.

Do not operate in inflammable/explosive environment.

Please keep the surface of the product clean & dry.

III Major Functions

Pocket-size oscilloscope DS203 helps you test, adjust & present electronic designs. Its functions include: ▼ 8M Hz bandwidth,8-bit precision

▼ 2 analog channels: (CH_A, CH_B), 2 digital channels (CH_C, CH_D)

▼ Calculation channels: [CH_A]+[CH_B], [CH_A]-[CH_B], [CH_C]|[CH_D],

[CH_C]&[CH_D],REC_A, REC_B, REC_C, REC_D

▼ Sampling rate of any analog channel can reach 72 MS/s

▼ Record length of any channel can reach 4096 bits

▼ Users can save waveforms and upgrade firmware with a built-in 2M USB disk.

IV Operation Precaution

▌Temperature:

Operating Condition:+0°C to +50°C

Non-operating Condition:-20 °C to +60 °C

▌Humidity:

Operating Condition:high temperature:40 °C to 50 °C,0% to 60% RH

Operating Condition:low temperature:0 °C to 40 °C,10 to 90%RH

Non-operating Condition:high temperature:40 °C to 60 °C,5 to 60% RH

Non-operating Condition:low temperature:0 °C to 40 °C,5 to 90% RH

▌Parameters

Max transient-withstanding voltage is ± 400 V peak value.

Measure voltage range

Measure frequency range

Max input voltage of logic probe is ±15 V peak value.

4

V General Inspection

When you get a new DS203 oscilloscope, it’s suggested to inspect the product by following steps.

1.Inspect for damage caused by shipping.

If the packaging carton or protection pad is seriously damaged, keep the package until you check the

oscilloscope & accessories electrically and mechanically.

2.Inspect the oscilloscope

Please contact us if following problems occur: (1) surface of device is damaged; (2) device can’t work well;

(3) device doesn’t pass performance test

If damage is resulted from shipping, please keep the container & inform the shipping department/others

responsible for this service.

VI Functional Inspection

Make a quick functional inspection to ensure this device works well. Please perform following steps:

1. Turn on power supply; access the homepage of the oscilloscope.

2. Connect the oscilloscope with standard signals (e.g.: square wave 20KHz, Vpp=5V); Set the switch on

probe tip as 1X, plug oscilloscope probe to CH_A.

Check whether the measured values are consistent with standard values. It can be calibrated if the margin is

narrow. Same for CH_B, CH_C & CH_D.

VII Firmware Upgrade

To upgrade the firmware, please perform following steps:

1. Open Web to access www.minidso.com, download the latest firmware of your oscilloscope to your PC.

2. Simultaneously press || of DS203 and turn on power supply, enter DFU firmware upgrade mode.

3. Use USB to connect DS203 to your PC, A removable disk named “DFU V3_10_D” will appear on your

PC. Copy the firmware to the root directory of this disk then restart DS203, thus firmware is upgraded.

5

VIII Oscilloscope Familiarization

1. Interfaces & buttons.

Front view, left→right: RUN/HOLD(||), CALIBRATE (■), PRESET (●), SAVE WAVE(▲)、

NAVIGATOR A(―…+), NAVIGATOR B(…).

Left view, top→bottom:Wave output[WAVE OUT],analog channel B[CH_B], analog channel A[CH_A].

Right view, top→bottom: Digital channelC [CH_C], digital channelD [CH_D], USB port, power switch.

----------------------------------------------------------------------------------------------------------------------

front view left view right view

RUN/HOLD PRESET SAVE WAVE

CALIBRATE NAVIGATOR A NAVIGATOR B

6

2. Screen

The display is depicted below:

Horizontally A—I is channel area; vertically J—T is measurement area. You can move cursor within A—G

by scrolling (…); change selection by scrolling (―…+); move cursor between upper & lower menus by

pressing (―…+). When cursor is in G Position, press (―…+) to move it within G—I; and press (▲) to move

cursor between channel area & measurement area. Each menu has the same color as its corresponding channel:

Channel A ( blue), Channel B( yellow), Channel C( purple), Channel D( green), Common menu is orange.

U—X is parameter area, U position shows parameters for THR, V1 & V2 to choose; V position is the

preferred parameter of (●) button; W position is △T=T2-T1, X position is △V=V1-V2

---------------------------------------------------------------------------------------------------------------------

2.1、Parameters

As in figure below, adjust G—I,output 1KHz from [WAVE OUT],input square waveform of 50% duty factor

into CH_B,Short press (●) to display current parameter.Annotations of parameters are shown in table below:

Display the position

of current waveform

Trigger

point

cache

depth

Channel Area

Parameter Area

Measurement Area

7

FPS Frames Per Second

Vpp Peak-to-Peak Voltage

Vdc Direct Current Voltage

RMS Average Value of Voltage

Max Maximum Voltage

Min Minimum Voltage

FRQ Signal Frequency

CIR Signal Cycle

DUT Duty factor

TH Monocycle High Level Time

TL Monocycle Low Level Time

Vbt Battery Voltage

There are 12 parameters; Short press(●) shows only 8 parameters; Press(●)longer and scroll (―…+)to

select parameter, press (―…+) to choose color (channel), press (…)or choose EXT to exit; as below:

---------------------------------------------------------------------------------------------------------------------

2.2. Functions of Channel Area

The table below shows the detailed introduction of the functions of menus in channel area:

Menu Item Function(Operate: Scroll(―…+))

A RUN/HOLD (Running Mode)RUN/HOLD, show voltage

B AC/DC/-- (Channel A)AC coupling/DC coupling/hide

50mV—10V (stepping in 1-2-5mode) voltage per grid

C AC/DC/-- (Channel B)AC coupling/DC coupling/hide

50mV—10V(stepping in 1-2-5mode) voltage per grid

D DC/-- (Channel C) DC coupling/hide

-- ----

8

E CH_(D)/(A+B)/(A-B)/(C&D)/(C|D)/

REC_A/ REC_B/ REC_C/ REC_D

thru CH_D: Input(A+B), waveforms of CH_A & CH_B sync

(A-B): get subtraction of waveforms of CH_A & CHA_B

(C&D): get and operation of CH_C & CH_D

(C|D): get or operation of CH_C & CH_D

REC_A: reload the last waveform saved in CH_A

Same for REC_B, REC_C & REC_D

-- -----

F AUTO/NORM/ (Trigger M)Auto/Norm/Sgl/slow scan/instant scan

0.1uS—1S(stepping in 1-2-5 mode) Unit per second

G Squ/Sin/Tri/Saw(≈2.8Vpp) (Waveform output)squ/sin/tri/sawtooth

H (Squ)10Hz—8MHz ﹤1MHz, stepping in 1-2-5mode

﹥1MHz, stepping in 2-4-6-8mode (Sin/Tri/Saw) 10Hz—20KHz

I (Squ)50%—90%(±10%) adjust duty factor

---------------------------------------------------------------------------------------------------------------------

2.3、Functions of Detection Area

The table below shows detailed illustrations of functions of menus in detection area:

Menu Item Function Operating Instruction

J

Trigger mode: falling

edge trigger, rising

edge trigger, (>, <)

trigger, (<, >) negative

pulse

width,(<, >)positive

pulse width

Scroll(―… + ) to choose trigger

mode, press (―… + ) to choose

channel (different colors)

K THR Trigger level Scroll (―…+ ) to adjust trigger

level (U position shows trigger

level),press (―…+ ) to choose

channel (CH_A/CH_B/hide)

L V1 Cursor V1: top limit

of visible trigger level

Scroll (―…+) to select top limit of

trigger level, and press (―…+) to

choose channel(CH_A/CH_B/

CH_C/CH_D/hide)

M V2 Cursor V2: bottom

limit of visible trigger

level

Scroll (―…+ ) to adjust bottom

limit of trigger level(in X position,

shows △V=V1-V2), press (―…+)

to choose channel (CH_A/CH_B/

CH_C/CH_D/hide)

N T1 Time Maker T1 Scroll (―…+) to adjust time maker

T1, and press (―…+) to hide time

marker

O T2 Time Marker T2 Scroll (―…+) to adjust time maker

T2 (in W position shows

△T=T1-T2), press (―…+) to hide

time marker T2.

P Y Horizontal Level of Scroll(―…+ )to adjust horizontal

9

each channel level, press(―… + ) to choose

channel(CH_A/CH_B/CH_C/CH_D)

Q X Choose the window to

display waveforms

Scroll(―…+) to choose waveforms

of different positions to display on

current window

R T0 ????? ???????

S 360-4K Memory depth Scroll (―…+) to choose memory

depth

T EXT/SAV ??????? ????????

---------------------------------------------------------------------------------------------------------------------

2.4、Menus

On screen, press (■) to access the menu, press again to exit. Detailed instructions are listed below:

Item(Up→Down) Function Operating Instruction

Save Param Save current parameter settings Press (―…+) to confirm,

scroll (…) to the next menu

Save Dat Save dat file to the built-in USB

disk

Press (―… + ) to confirm,

scroll (―…+) to choose file

no., scroll (…) to next menu

Save Buf Save buf file (sample data in

buffering area) to built-in USB

disk

Press (―… + ) to confirm,

scroll (―…+) to choose file

no., scroll (…) to next menu

Save Bmp Save bmp file (waveform

image) to the built-in USB disk.

Press (―… + ) to confirm,

scroll (―…+) to choose file

no., scroll(…) to next menu.

Save Csv Save csv file (export sampling

data of buffering area) to

built-in USB disk

Press (―… + ) to confirm,

scroll (―…+) to choose file

no., scroll(…) to next menu.

Load Dat Load dat file Press (―… + ) to confirm,

scroll (―…+) to choose file

no., scroll (…)to next menu.

Load Buf Load buf file Press (―… + ) to confirm,

scroll (―…+) to choose file

no., scroll (…)to next menu.

BackLight Adjust backlight brightness Press (―… + ) to confirm,

scroll (―… + ) to adjust

backlight brightness, scroll

(…) to next menu.

Buzzer Adjust buzzer volume Press (―… + ) to confirm,

scroll (―…+) to adjust buzzer

volume, scroll (…) to next

menu.

Standby Choose screensaver Press (―… + ) to confirm,

scroll (―…+) to choose file

no., scroll (…) to next

10

menu.

Calibrat Instrument calibration (make

sure CH_A is ground connected)

Press (―…+) to confirm, press

(■) to calibrate.

IX Application Examples:

1. Example One:Measure simple signals

Observe one unknown signal in a circuit, measure & display the frequency & peak-to-peak value of the signal.

Please operate according to following steps:

Connect the probe of CH_A/CH_B to the detection point of the circuit.

Set CH(A)/CH(B) as AUTO mode, DC coupling, adjust the(horizontal) time calibration and (vertical) voltage

calibration, make sure the signal displays clearly.

Adjust THR value to make the display of signals stable.

Press(●), analyze signal parameters, e.g.:Vpp(peak-to-peak voltage), RMS(average value of

voltage),FRQ(frequency) and so on.

Take the following figure as an example:

2. Example Two: Acquire a single signal

It’s the superiority and feature of digital oscilloscope to easily acquire non-periodic signals like impulsion

and sentus. To acquire a single signal, you need a priori knowledge of it to set trigger level & trigger edge. E.G. if

impulsion is a TTL PWL logic signal, trig level should be set as 2V, trig edge as rising edge trig. If the signal is

not stable, it’s suggested to observe in a normal triggering mode to define trig level & trig edge.

Operation steps are as follows:

Connect the probe of CH_B to detection point of the circuit.

Set the triggering: set J as (rising edge trig), F as SINGL(single trig), trig setting: DC coupling.

Adjust horizontal time level and vertical scale to proper range.

Adjust K position THR, adjust to proper trig level.

Press (||), wait for proper trig signal to appear. If a signal reaches preset trig level, sample & display it.

11

This function can catch occasional incidents very easily; e.g. a sudden sentus of high amplitude. Set the trig

level a little higher than normal signal level, press (||), and when the sentus occurs, the device will automatically

trig & store the waveforms before & after the trig. It’s depicted as the figure below to better observe the changes

of waveforms before & after the trig.

3. Example Three: Cursor measurements

A cursor can be used to measure the time and voltage of the waveform very quickly.

(1)Measure the cycle of the 3rd waveform from the signal source.

Please operate according to the following steps:

Move cursor to N(T1)。

Scroll (―…+), put cursor T1 to the 3rd peak value of the signal.

Move cursor to N position (T2).

Scroll (―…+), put cursor T2 to the 4th peak value of the signal.

Then you’ll get: △T=14.0uS, i.e. cycle of the 3rd wave crest.

(2) Measure the peak-to-peak value of the signal source

Please operate according to the following steps:

Move the cursor to L position (V1)

Scroll (―…+), put cursor V1 to wave crest of the signal.

Move cursor to M position (V2)

Scroll (―…+), put cursor V2 to wave trough of the signal.

Then you’ll get: △V=168mV, i.e. peak-to-peak value of the signal

As shown in the following figure

12

4. Example Four: Comparison of Waveforms

Module E(REC_A/ REC_B/ REC_C/ REC_D) can be used to compare standard signal & unknown signal.

Please operate according to following steps:

Input standard signal to CH_A, press (■), choose Save Dat 01 to save waveform, as in Figure 4.1:

Input unknown signal to CH_ A, in E position choose REC_A, press (■), choose Load Dat, as Figure 4.2:

Move P position Y to adjust horizontal level, to compare waveforms, as in Figure 4.3:

Figure 4.1

Vpp Cycle

13

Figure 4.2

Figure 4.3

5. Example Five: Save waveform images

Sometimes waveform images need to be archived/analyzed on PC platform.

Please operate according to following steps:

With prerequisite of correct measurement of signal source, press (■), choose Save Bmp 01, scroll (―…+)

to choose file no., press (―…+) to confirm. The file (named IMAG001.BMP) will be saved to built-in USB

disk; as in following figure.

To analyze waveform images, you only need to copy the images to your PC.

14

X Operation Tips

1. When measure high frequency signals, to enhance scan speed, it’s suggested to lower buffer depth by

adjusting S position, 360 points as a window, and adjust X in Q position to observe the buffer waveforms in

the memory.

2. After access to the signal, choose AC coupling scale when need to observe noise and ripple waveform.

3. Use cursor V1 & V2 to measure two random points for voltage difference.

4. Use cursor T1 & T2 to measure two random points for time differ

The content on this Web site is for informational purposes only, and

is subject to change, without prior notice.

http://shop36212219.taobao.com

http://meishun88.taobao.com

15

DS203 用户手册 (app_yijian)

目录

一、产品简介………………………………………………………………………………..…….2

二、常规安全概要 ……………………………………………………………………………….. 2

三、主要功能 ……………………………………………………………………………………..2

四、操作注意事项 ………………………………………………………………………………..2

五、一般性检查 …………………………………………………………………………………. 3

六、功能检查 .................................................................................................................................. 3

七、升级固件 …………………………………………………………………………………….3

八、熟悉仪器 ……………………………………………………………………………………. 5

1、仪器接口与按键介绍………………………………………………………………………5

2、主屏幕介绍…………………………………………………………………………………5

2.1、参数键参数介绍…………………………………………………………………………6

2.2、通道区功能介绍…………………………………………………………………………7

2.3、检测区区功能介绍……………………………………………………………………….7

2.4、菜单键菜单介绍…………………………………………………………………………. 9

九、应用实例…………………………………………………………………………………….9

1、例一:测量简单信号………………………………………………………………………9

2、例二:捕捉单次信号………………………………………………………………………10

3、例三:应用游标测量………………………………………………………………………11

4、例四:波形对比……………………………………………………………………………12

5、例五:保存波形图片………………………………………………………………………14

十、操作小技巧……………………………………………………………………………………15

16

一、产品简介

DS203 是一个 5 踪 4 线的通用电子工程任务的数字示波器。它的基于 ARM Cortex M3 内核的 CPU,

采用 FPGA 实现对外接 ADC 的管理控制和数据缓存,内置 2MB 的 U 盘,用户可以通过 U 盘来存储波形和升

级系统固件,并提供 4个应用程序分区,方便用户装载和升级最多 4个不同的应用程序固件。

二、常规安全概要

详细阅读下列安全性预防措施,以避免人身伤害,并防止损坏本产品或与本产品连接的任何产品。

为避免可能的危险,请务必按照规定使用本产品。

避免火灾或人身伤害。

使用合适的电源线。 请只使用本产品专用并经所在国家/地区认证的电源线。

正确连接并正确断开连接。探头或测试导线连接到电压源时请勿插拔,连接电流探头或断开电流探

头的连接之前请将被测电路断电。

遵守所有终端额定值。为避免火灾或电击,请遵守产品上的所有额定值和标记。在对产品进行连接

之前,请首先查阅产品手册,了解有关额定值的详细信息。

请勿在潮湿环境下操作。

请勿在易燃易爆的环境中操作。

请保持产品表面清洁干燥。

三、主要功能

袖珍示波器 DS203 可以帮您验证、调试和表征电子设计。主要功能包括:

▼ 8M Hz 带宽,8 位精确度

▼ 两个模拟通道(CH_A、CH_B),两个数字通道(CH_C、CH_D)

▼ 运算通道数[CH_A]+[CH_B], [CH_A]-[CH_B], [CH_C]|[CH_D], [CH_C]&[CH_D],REC_A,

REC_B, REC_C, REC_D

▼ 所有模拟通道上的取样速率高达 72 MS/s

▼ 所有通道上的记录长度均为 4096 点

▼ 用户可通过内置 2M的 U 盘存储波形和升级系统固件

四、操作注意事项

▌温度:

工作状态:+0°C 到+50°C

非工作状态:-20 °C 到 +60 °C

▌湿度:

工作状态:高温:40 °C 到 50 °C,0% 到 60% RH

工作状态:低温:0 °C 到 40 °C,10 到 90%RH

17

非工作状态:高温:40 °C 到 60 °C,5 到 60% RH

非工作状态:低温:0 °C 到 40 °C,5 到 90% RH

▌参数

最大瞬时承受电压是 ± 400 V 峰值。

测量电压范围

测量频率范围

逻辑探头输入处的最大输入电压为 ±15 V 峰值。

五、一般性检查

当您得到一台新的 DS203 示波器时,建议您按以下步骤对仪器进行检查。

1.检查是否存在因运输造成的损坏。

如果发现包装纸箱或泡沫塑料保护垫严重破损,请先保留,直到整机和附件通过电

性和机械性测试。

2.检查整机。

如果发现仪器外观破损,仪器工作不正常,或未能通过性能测试,请和公司联系。

如果因运输造成仪器的损坏,请注意保留包装。通知运输部门和负责此业务的

RIGOL 经销商。RIGOL 会安排维修或更换。

六、功能检查

做一次快速功能检查,以核实本仪器运行正常。请按如下步骤进行:

3. 打开电源开关,进入示波器主页面。

4. 示波器接入标准信号(如:方波 20KHz,Vpp=5V), 用示波器探头将信号接入通道 A(CH_A) :

将探头上的开关设定为 1X,并将示波器探头与通道 A 连接。 将探头插槽对准 CHA 插接件上的

插口并插入。

检验测量值与标准值是否一致,相差不大可进行校准,同理可检测 CH_B, CH_C, CH_D。

七、升级固件

要升级示波器的固件,请执行以下操作:

1.打开 Web 浏览器访问

www.minidso.com,将适用的示波器最新固件下载到 PC 上。

2.按下 DS203 的 || 键并同时按下电源键开机,进入 DFU 固件升级模式。

3.用 USB 数据线将 DS203 连接到 PC 机上,PC 机将出现名为:DFU V3_10_D 的可移动硬盘,把准

备好的固件拷贝到该移动硬盘的根目录下,重新启动 DS203,完成固件升级。

18

19

八、熟悉仪器

1、仪器接口与按键介绍

、正面图,上方有六个按键,从左到右依次是运行/暂停键( || )、菜单键( ■ )、参数键( ● )、

跳转键( ▲ )、选项键( ―…+ )、移动键(…)。

、左视图,有三个通道,从上到下依次是波形输出[ WAVE OUT ]、模拟通道 B[ CH_B ]、模拟

通道 A[ CH_A ]。

、右视图,从上到下依次是数字通道 C[ CH_C ]、数字通道 D[ CH_D ]、USB 接口、电源开关。

----------------------------------------------------------------------------------------------------------------------

2、主屏幕介绍

主屏幕如下图所示:

显示当前波形窗口

在内存中的位置

内存中的

触发位置

内存缓存

深度

通道区

参数区

测量区

正面图 左视图 右视图

运行/暂停键 参数键 选项键

菜单键 跳转键 移动键

20

横向 A—I 选项是通道区,纵向 J—T 是测量区,滚动移动键(…)可使光标在 A—G 之间移动,

滚动选项键( ―…+ )可更改选项,按下选项键( ―…+ )可使光标在上下层菜单跳转,当光标在 G

处时,按下选项键( ―…+ )可使光标在 G—I 之间跳转,按下跳转键( ▲ )可使光标在通道区与测

量区之间跳转,各菜单选项颜色与通道一 一对应,通道 A 菜单(蓝色)、通道 B(黄色)、通道 C(紫色)、

通道 D(绿色),公共菜单用橙色。

U—X 是参数区,U 位置是 THR、V1、V2 可选显示的参数,V 位置是参数键首选项显示参数,W 位

置是△T=T2-T1,X 位置是△V=V1-V2

---------------------------------------------------------------------------------------------------------------------

2.1、参数键参数介绍

如下图所示,调节 G—I,使波形输出[ WAVE OUT ]通道输出 1KHz,占空比 50%的方波,接入通道

B(CH_B),按下参数键(短按),显示当前参数,参数注释如下表:

FPS 每秒扫描波形帧数

Vpp 电压峰峰值

Vdc 直流电压

RMS 电压平均值

Max 电压最大值

Min 电压最小值

FRQ 信号频率

CIR 信号周期

DUT 占空比

TH 单周期高电平时间

TL 单周期低电平时间

Vbt 电池电压

总共有 12 个参数,按下(短按)参数键只能显示其中 8 位参数,可通过长按参数键,滚动选项键选

择显示参数,按下选项键可选择不同颜色(不同通道),按下移动键或选择 EXT 按下选择键退出,如

下图:

21

---------------------------------------------------------------------------------------------------------------------

2.2、通道区功能介绍

下表是通道区详细菜单选项功能说明:

菜单 选项 功能(操作:滚动选项键( ―…+ ))

A RUN/HOLD (运行状态)运行/暂停,显示电量

B AC/DC/-- (通道 A)交流耦合/直流耦合/隐藏

50mV—10V(1-2-5 步进) 单位小格伏值

C AC/DC/-- (通道 B)交流耦合/直流耦合/隐藏

50mV—10V(1-2-5 步进) 单位小格伏值

D DC/-- (通道 C)直流耦合/隐藏

-- 无

E CH_(D)/(A+B)/(A-B)/(C&D)/(C|D)/ CH_(D):选择通道 D 输入

-- 无

F AUTO/NORM/ (触发模式)自动/标准/单次/慢扫描/即时扫

0.1uS—1S(1-2-5 步进) 时间单位值

G Squ/Sin/Tri/Saw(约 2.8Vpp) (波形输出)方波/正弦波/三角波/锯齿波

H (Squ)10Hz—8MHz 1MHz 以下 1-2-5 步进

1MHz 以上 2-4-6-8 步进 (Sin/Tri/Saw) 10Hz—20KHz

I (Squ)50%—90%(±10%) 占空比调节

---------------------------------------------------------------------------------------------------------------------

2.3、检测区区功能介绍

下表是检测区详细菜单选项功能说明:

22

菜单 选项 功能 操作说明

J

触发方式:下降沿触发、上

升沿触发、大于触发、小于

触发、负脉宽小于触发、负

脉宽大于触发、正脉宽小于

触发、正脉宽大于触发。

滚动选项键选择触发

方式,按下选项键选择

通道(不同颜色)

K THR 触发线: 滚动选项键调节触发

伏值大小(在 U 位置

显示伏值),按下选项

键 选 择 通 道

(CH_A/CH_B/hide)

L V1 游标 V1:可视伏值上限 滚动选项键调节伏值

上限大小,按下选项键

选 择 通 道

( CH_A/CH_B/

CH_C/CH_D/hide)

M V2 游标 V2:可视伏值下限 滚动选项键调节伏值

下限大小(在 X 位置

显示

△V=V1-V2),按下选

项 键 选 择 通 道

( CH_A/CH_B/

CH_C/CH_D/hide)

N T1 时间游标 T1 滚动选项键调节时间

游标 T1 大小,按下选

项键选择隐藏游标 T1

O T2 时间游标 T2 滚动选项键调节时间

游标 T2 大小,(在 W

位置显示

△T=T1-T2)按下选项

键选择隐藏游标 T2

P Y 各通道的水平线 滚动选项键调节水平

线,按下选项键选择通

( CH_A/CH_B/

CH_C/CH_D)

Q X 选择显示波形窗口 滚动选项键选择内存

不同位置的波形显示

在当前窗口

R T0 ????? ???????

S 360-4K 内存储存深度 滚动选项键选择内存

储存深度

T EXT/SAV ??????? ????????

---------------------------------------------------------------------------------------------------------------------

23

2.4、菜单键菜单介绍

主界面下,按下菜单键,进入菜单选项,再次按下菜单键,退出菜单选项,具体说明如下表:

选项(上—下) 功能 操作说明

Save Param 保存当前参数设置 按下选项键确认,滚动移动键

到下一个菜单选项

Save Dat 保存 dat 文件到内置 U 盘

按下选项键确认,滚动选项键

选择文件编号,滚动移动键到

下一个菜单选项

Save Buf 保存 buf 文件(采样缓冲

区数据)到内置 U 盘中

按下选项键确认,滚动选项键

选择文件编号,滚动移动键到

下一个菜单选项

Save Bmp 保存 bmp 文件(波形图)

到内置 U 盘中

按下选项键确认,滚动选项键

选择文件编号,滚动移动键到

下一个菜单选项

Save Csv 保存 csv 文件(导出采样

缓冲区数据 )到内置 U

盘中

按下选项键确认,滚动选项键

选择文件编号,滚动移动键到

下一个菜单选项

Load Dat 载入 dat 文件 按下选项键确认,滚动选项键

选择文件编号,滚动移动键到

下一个菜单选项

Load Buf 载入 buf 文件 按下选项键确认,滚动选项键

选择文件编号,滚动移动键到

下一个菜单选项

BackLight 调节背光亮度 按下选项键确认,滚动选项键

调节背光亮度,滚动移动键到

下一个菜单选项

Buzzer 调节蜂鸣器音量大小 按下选项键确认,滚动选项键

调节蜂鸣器音量大小,滚动移

动键到下一个菜单选项

Standby 选择屏保 按下选项键确认,滚动选项键

选择文件编号,滚动移动键到

下一个菜单选项

Calibrat 仪器校准(确认 CH_A 接

地)

按下选项键确认,按下菜单键

开始校准

九、应用实例:

1、 例一:测量简单信号

观测电路中一未知信号,迅速显示和测量信号的频率和峰峰值。

请按如下步骤操作:

将通道 A(通道 B)的探头连接到电路被测点。

24

设置通道 A(通道 B)为 AUTO 模式,直流耦合(DC),调节(水平)时间单位刻度与(竖直)伏值单

位刻度,使信号清晰显示。

调整 THR 值使信号稳定显示。

按下参数键,分析信号参数,例如:Vpp(电压峰峰值)、RMS(平均电压)、FRQ(频率)等。

例如下图:

2、 例二:捕捉单次信号

方便地捕捉脉冲、毛刺等非周期性的信号是数字示波器的优势和特点。若捕捉一个单次信号,首先需

要对此信号有一定的先验知识,才能设置触发电平和触发沿。例如,如果脉冲是一个 TTL 电平的逻辑信

号,触发电平应该设置成 2 伏,触发沿设置成上升沿触发。如果对于信号的情况不确定,可以通过普通

的触发方式先行观察,以确定触发电平和触发沿。

操作步骤如下:

将通道 B 的探头连接到电路被测点。

进行触发设定:J 位置为 (上升沿触发),F 位置为 SINGL(单次触发),触发设置:直流耦合。

调整水平时基和垂直档位至适合的范围。

调节 K 位置 THR,调整适合的触发电平。

按 RUN/STOP 执行按钮,等待符合触发条件的信号出现。如果有某一信号达到设定的触发电平,即采

样一次,显示在屏幕上。

利用此功能可以轻易捕捉到偶然发生的事件,例如幅度较大的突发性毛刺:将触发电平设置到刚刚高

于正常信号电平,按 RUN/STOP 按钮开始等待,则当毛刺发生时,机器自动触发并把触发前后一段时

间的波形记录下来。便于观察毛刺发生之前的波形,如下图所示。

25

3、 例三:应用游标测量

使用游标可迅速地对波形进行时间和电压测量

(1)测量信号源第三个波峰的周期

请按如下步骤操作:

移动光标到 N 位置(T1)。

滚动选项键将游标 T1 置于信号的第三个峰值处。

移动光标到 N 位置(T2)。

滚动选项键将游标 T2 置于信号的第四个峰值处。

得到:△T=14.0uS 即是第三个波峰的周期。

(2)测量信号源峰峰值

请按如下步骤操作:

移动光标到 L 位置(V1)。

滚动选项键将游标 V1 置于信号波峰处。

移动光标到 M 位置(V2)。

滚动选项键将游标 V2 置于信号波谷处。

得到:△V=168mV 即是信号峰峰值,

如下图。

26

4、 例四:波形对比

使用 E 位置(REC_A/ REC_B/ REC_C/ REC_D)模块可实现标准信号与未知待测信号对比

请按如下步骤操作:

通道 A 输入标准信号波形,按下菜单键选择 Save Dat 01,保存波形,如下图 4.1。

通道 A 输入未知待测信号,E 位置选择 REC_A,按下菜单键选择 Load Dat,如图 4.2。

移动 P 位置 Y 调节水平线,实现波形对比,如下图 4.3。

峰峰值 周期

27

图 4.1

图 4.2

28

图 4.3

5、 例五:保存波形图片

波形图有时需要存档,或是在 PC 机平台分析

请按如下步骤操作:

正确测量信号源前提下,按下菜单键,选中 Save Bmp 01,滚动选项键选择保存图片文件编号,按

下选项键确认,文件将保存在内置 U 盘中,文件名为 IMAG001.BMP 如下图。

需分析波形图是只需把图片拷贝到 PC 机上即可。

29

十、操作小技巧

1、当测量高频信号时,为了提高扫描速度,可调节 S 位置降低缓存深度,360 个点为一个窗口,可调

节 Q 位置的 X 选项任意观察内存中缓存得波形。

2、接入信号后,需观察噪声、纹波时,可选择交流耦合档位。

3、可通过游标 V1、游标 V2 测量任意两点电压差值。

4、可通过游标 T1、游标 T2 测量任意两点时间差值。

注:资料如有更新,恕不另行通知

美顺科技

广州胜豪电子科技有限公司

http://shop36212219.taobao.com

http://meishun88.taobao.com