PC-Based USB digital storage oscilloscope

 DSO-2090/2150/2250/2500/5200/5200A USB

2. Characteristic

• USB2.0 interface, no external power source required, easy to use.
• be suitable for notebook computer，product line maintenance，be used easily on business.
• Dimensions (mm):190(L) x100(W) x35(H), be carried easily.
• High performance, 100MS/s-500MS/s real-time sampling, 40MHz Bandwidth.
• Operating System: Windows98,Windows Me, Windows NT, Windows 2000, Windows XP ,VISTA
• 23 measurement functions, PASS/FAIL Check, be suitable for technical application.
• Waveform average, persistence, intensity, invert, addition, subtraction, multiplication, division, X-Y plot.
• Save waveform in the following: text file, jpg/bmp graphic file, MS excel/word file.
• FFT
• One computer can connect many DSO, extend channel easily.
• Labview\VB\VC\Delphi\C++Builder Second Design instance.

3. Hardware Specification

Channel	2 Channels
Impedance	1MΩ 25pF
Coupling	AC/DC/GND
Vertical resolution	8Bit
Gain range	10mV-5V, 9Steps
DC accuracy	±3%
Timebase range	4ns-1h, 38 Steps
Vertical adjustable	Yes
Input protection	Diode clamping
X-Y	Yes
Autoset	Yes (30Hz to 200MHz)
EXT. input	Yes
Trigger Mode	Auto, Normal and Single
Trigger Slope	+/-
Trigger level adjustable	Yes
Trigger Type	Rising edge, falling edge
Trigger Source	CH1, CH2, EXT
Pre/Post trigger	0-100%
Buffer size	10K-1M/Channel
Shot bandwidth	DC to 200MHz
Max. Sample rate	100MS/s-500MS/s
Sampling selection	Yes
Waveform Display	port/line, waveform average, persistence, intensity
Network	Open/Close
Vertical mode	CH1, CH2, Dual, ADD
Cursor measurement	Yes
Spectrum analyzer
Channel	2 Channels
Math	FFT, addition, subtraction, multiplication, division.
Bandwidth	40MHz-200MHz
Cursor	Frequency, Voltage
Data Samples	10K-1M/Channel
Accessories	S/W CD, probes, manual, USB cord

4．Software：

Operating system: Windows98, Windows Me, Windows NT, Windows 2000,

Windows XP, VISTA.

5．SecondDesign：

    Supply DEMO code (VC、CVI、VB、LABVIEW) and technical support.

6．Accessories：

S/W CD, probes, manual, USB cord

DSO2250/2150/2090 Second Design Manual

1．Functions introduction

Define struct:

sttruc Control_Data1_Struct{   

        WORD Trig_Source;      //Trigger Source

        WORD Ch_select;      //Channel Select

        WORD TIMEBASE;      //TimeBase

        WORD Trig_Addr;      //Address of trigger point

        WORD Data_Length;      //Length of data

    WORD Data_BufferSize;    //Buffer Size

      WORD Alt_flag;        //Remark of ALT

};

struct Levers_Struct{

        WORD Ch1Lever;      //Position of Channel 1

        WORD Ch2Lever;      //Position of Channel 2

        WORD Ch1TrigLever;     //Position of Channel 1 trigger

        WORD Ch2TrigLever;     //Position of Channel 2 trigger

        WORD ExtTrigLever;      //Position of extern trigger

};

Functions for hardware

1.

WORD __stdcall dsoSetTriggerAndSampleRate ( 

WORD DeviceIndex, //Device Index

                  Struct Control_Data1_Struct *Control_Data1 ) 

Note: Init and set trigger and sample rate. If you change TimeBase, you must use this

function. If successful return 1, else return 0.

 2.

WORD __stdcall dsoSetFilt ( WORD DeviceIndex,

              WORD Ch1_Filt,      //Channel 1 filter

              WORD Ch2_Filt,      //Channel 2 filter

              WORD Trigger_Filt)     // Trigger filter

Note: Init and set channel or trigger filter. If successful return 1, else return 0.

3.

WORD __stdcall dsoSetVoltageAndCoupling (

WORD DeviceIndex,

                  WORD Ch1_Att,     //Channel 1 voltage

                  WORD Ch2_Att,     //Channel 2 voltage

                  WORD Ch1_ACDC,    //Channel 1 AC/DC

                  WORD Ch2_ACDC    //Channel 2 AC/DC,

                  WORD TriggerSource )  //Trigger source

Note: Init and set channel voltage and coupling. If successful return 1, else return 0.

4.

bool __stdcall dsoSetOffset ( WORD DeviceIndex,

struct Levers_Struct * Levers,   /* Channels and trigger

lever data   */

              WORD Ch1_Att,

              WORD Ch2_Att,

              WORD TriggerSource,

              WORD * level )       //Channels level data

Note: Init and set trigger lever and level. If successful return TRUE, else return FALSE.

5.

WORD __stdcall dsoGetCaptureState ( WORD DeviceIndex,

int *Ram_Addr )  //Address of trigger point

Note: Get address of trigger point. If successful return 2, else return 0 or 1.

6.

WORD __stdcall dsoGetChannelData ( WORD DeviceIndex,

                   WORD Ch1_Att,

                   WORD Ch2_Att,

                   WORD pos_trig,  //Position of trigger point

                   WORD * ch1_data,   //Channel 1 data

                   WORD * ch2_data,  //Channel 2 data

                   struct Control_Data1_Struct *Control_Data1, 

                   int Ram_Addr,

int calData ) //Calibration Data Offset

Note:

Variable: ‘calData‘: Calibration Data Offset. Range(0~10).

Get Channel1 and Channel 2 data. If successful return 1, else return 0.

7.

WORD __stdcall dsoCaptureStart ( WORD DeviceIndex )

Note: Start capturing data. If successful return 1, else return 0.

8. 

long __stdcall dsoTriggerEnabled ( WORD DeviceIndex,

WORD Ch1_Att,

WORD Ch2_Att )

Note: Allow of next trigger. If the function succeeds, the return value is nonzero. If the

function fails, the return value is zero.

9.

BOOL __stdcall dsoForceTrigger

 ( WORD DeviceIndex )

Note: If hardware does not trigger long time, this function will trigger one time. If the

function succeeds, the return value is nonzero. If the function fails, the return value is

zero.

2.Flowchart    Operation Manual

For example: DSO2150 USB

Running Step:

1． Install labVIEW.

2． Copy the file "dso_2150usb.dll" to the path"C:\WINDOWS\system32".

 Equipment consists of two  oscilloscope probe