User Manual
Contents
1. Fuse Bits Ext byte OxFF High byte OxD6 OxE2 F PCB normally The factory fuse setting for U4 and US are listed in tables at right Please do not change them unless you know what you are doing Low byt Oey OxEO H PCB Use Battery DSO 068 can be powered by battery Typically 3 7V 1200mAh Li ion battery is used When fully charged it can run the device about 4 hours with backlight on The assembly BOB2 JYE118 is battery USB power switch and battery charger It charges battery once USB is connected The charging process is fully automatical and terminates itself when battery is full The charge current can be programmed by R32 Please refer to datasheet of JYE118 for details Short JP5 if external battery is to be used Note Internal battery must be removed in this case Equivalent Time Sampleing ETS When timebase is set to 2us or faster capture will automatically use Equivalent Time Sampling method This method can display more details of signal But there are two conditions for it Specifications to work 1 Signal must be periodic Max ETS sampling rate 20MSa s 2 Trig must happens Max realtime sample rate 2MSa s Analog bandwidth 0 3MHz As a result in ETS you may see no screen Sensitivity range 10mV div 5V div activity if any of these conditions are not Max input voltage 50Vpk 1X probe 400 Vpk 10X probe met In this case try adjusting trigger leve2. Image amp Waveform Data Upload Use XModem supporting software such as Tera Term for uploading Name screen image to bmp file Name waveform data to csv file First start sending from menu and then start receiving at host Note that the screen or waveform displayed right before entering menu will be sent Boot Process and Indication At powering up or reset system first enters bootloader bootloader is installed before shipment LED D1 will flash once If jumper JP7 is closed buzzer will beep once accordingly System will stay in bootloader for about 2 seconds detecting firmware upgrading request from host If no request received it will enter the main firmware Once in the main firmware JYE Tech logo will be displayed together with firmware versions LED D1 will flash twice If jumper JP7 is closed buzzer will beep twice accordingly System then enters working state The activities of LED and buzzer serve as indication of correct booting Factory Default Timebase Ims DIV Vertical Pos 0 Horizon Pos 80 Trigger Mode AUTO Trigger Slope Falling Trigger Pos 50 Record Len 256 points Test Sig Freq 1000Hz Test Sig Amp 5V Forced Default Recovery Normally factory default can be recovered by menu It can also be done by connecting PF6 at J7 to ground and performing reset press SW12 for example Remember to disconnect PF6 from ground after recovery is done BJ JYE Tech Ltd www jyet
3. Attention DS0068 Digital Oscilloscope User Manual rev o2 Panel amp Connectors 1 Battery voltage must be within 2 5V range 2 Maximum input voltage is 50Vpk for 1X probe 3 Do not attempt to measure live power directly Basic Operations 1 Connection Connect probe to the BNC connector marked INPUT Fig 4 Connect USB cable if the unit is powered by USB Fig 2 2 Power on amp off Power ON Press ADJ dial once System will first enter Bootloader stay for about 2 seconds and then enter running state Power switch Menu Sensitivity Power OFF Hold ADJ dial for about 3 seconds Selector amp Parameter Adjustment Hold R SW3 o un 3 Set parameters Oscilloscope parameters can be grouped by three main catagories vertical horizontal and trigger Digital Oscillo Si Frequency Meter PS 1 Vertical including SENSITIVITY POSITION and COUPLE Sensitivity To set SENSITIVITY use the upper two slide switches Setting is displayed on screen as volt div Doo 1 To change vertical POSITION press VPOS button and then turn ADJ dial is Ves HPOS SEGON To change COUPLE use the lower slide switch Sara vt 2 Horizontal including TIMEBASE and POSITION SW1 USB Socket To set TIMEBASE press Sec Div button and then turn ADJ dial 9050 064 To change horizontal POSITION press HPOS and then turn ADJ Setting is diaplayed as Second div on screen External Battery Fi
4. ech com Firmware Upgrading DSO 068 contains two AVR microcontrollers from Atmel ATMega64 U4 and ATMega48 U5 Their function and performance can be changed by changing firmware Note that the firmware of U4 can be changed by programmer or bootloader Firmware of U5 can only be changed by programmer By Programmer J4 and J5 pinout The program ports for U4 and US are J4 and J5 respectively Their sy GND GND pinout is compatible to STK200 and is shown in Fig 7 It is important to pick up a programmer with matching programming 00000 header JYE Tech offers compatible programmer PN 07302 Pin 0000 Follow instructions of selected programmer and host application MOSI SCK nRST MISO to perform firmware upgrading Fig 7 By Bootloader DSO 068 has bootloader pre installed which can work with an PC application via serial connection to perform firmware upgrading The PC application is called AVRUBD It can be downloaded at http www jyetech com Support avrubd rar For how to use bootloader please refer to the aritcle How to Upgrade Firmware by Bootloader http www jyetech com Support HowToUpgradefirmwareByBootloader pdf DSO 068 can enter bootloader by one of three methods 1 powering up U4 ATmega64 Fuse Bits 2 executing menu item REBOOT 3 pressing switch SW12 Ext byte OxFF High byte 0xC2 Fuse Bits Setting Low byte 0x2E It is important to have correct fuse bit setting for DSO 068 to run US5 ATmega48
5. g 1 Parmeter iede Fig 2 Connector 3 Trigger including trigger MODE SLOPE and LEVEL To set trigger MODE press MODE button and then turn ADJ dial To set trigger SLOPE press SLOPE button and then turn ADJ dial Trigger Level HOLD Indicator To change trigger LEVEI press LEVEL button and then turn ADJ dial Couple a What Trigger Mode Means and How to Use It Vertical en y The trigger can work under automatic AUTO normal NORM or single SING mode Under AUTO mode the scope Position will perform capture and display results no matter there is trigging or not Under NORM mode the scope performs capture Timebase Sec Div and updates display only when trigging happens The SING mode is similar to NORM mode The only difference is under een SING mode the scope will enter HOLD state automatically after a capture and will stay untill manual release oti Mode When trigger mode is set to NORM or SING you may find no screen updates This is because there is no trig happening i In this case you may like first switch to AUTO mode to make sure signal and trigger level are in proper range and then Trigger Level Facer switch back to NORM or SING Fig 3 Hor Position Trig Point Trigger Slope T Fig 4 Menu Operations 1 Press ADJ to have menu displayed 2 Turn ADJ to select function and press ADJ to execute B n functions arem dependent Please aie i ct n sa a n p nee Rie Under any mode Menu Functions see their function under dilreren
6. l i Input impedance 1M ohm 20pF to make trig happen Resolution 8 bits Note that trig point has no meaning in ETS Record length 256 5 12 1024 points variable Timebase range 10m minute Div 0 5us Div Data Interface Trigger modes Auto Normal and Single The data interface of DSO 068 is a serial Trigger position range 0 100 interface of Uart TTL level or USB It has Frequency meter range 5MHz two main functions F meter sensitivity 0 2Vpp 5MHz 3 7V Li ion batter USB 1 Working with jyeLab as USB Scope Power supply 2 High resolution 10 bits Data Logger Current consumption 300mA with LCD backlight ON Dimension 140 x 70 x 30mm Details of the data interface are separately 0 18KG without battery and probe documented Weight
7. mplitude dispaly The calibration can be perform by use of the built in test signal generator of 068 Test signal output 1 Enter menu Set test signal to 1KHz and 5V respectively 2 Set the switch on probe handle to 10X position 3 Set timebase to 0 2ms and sensitivity to 0 2V see Fig 6 4 Place probe tip onto the central conductor of test signal connector Fig 5 Adjust trigger level if display is not stable 5 Adjust the cap trimmer at probe connector with small screw driver see Fig 5 so as sharp rectangle waveform is displayed middle screen of Fig 6 Cap trimmer Fig 5 Fig 6 Good Too much Not enough Vertical Position Alignment In case of that there is a mismatch between OV trace and the vertical position indicator please follow the steps below to eliminate it 1 Set couple switch to GND position 2 Hold VPOS for about 3 seconds You should see the OV trace aligned to the indicator USB Connection In order to use USB function the host which DSO 068 is to communicate with is required to install driver supporting the USB Uart bridge CP2102 Please use the following link to download driver and install it refering to documents accompanying www silabs com products mcu pages usbtouartbridgevcpdrivers aspx Serial Port Parameters For the main firmware serial port parameters are fixed to 115200 bps and 8 N 1 For the bootloader serial port parameters are fixed to 9600 bps and 8 N 1 Screen
8. t Modes DELOW any hold power off LEVEL hold backlight ON OFF No Menu Item Button Functions 1 Function Descriptions Oscilloscope Mode 0 OSCILLOSCOPE Enter oscilloscope mode RUNNING 1 FREQ METER Enter frequency meter mode Button Name Function HOLD 2 FFT Enter FFT mode VPOS Select vertical position Button Name Function 3 SAVE WAVEFORM Save waveform The last waveform captured before enter menu is saved to EEPRON HPOS Select horizontal position VPOS Select vertical position This function is only available under oscilloscope mode SEC DIV Select timebase HPOS Select horizontal position 4 RECALL WAVEFORM Recall saved waveform from EEPROM and display it in HOLD state MODE Select trigger mode MODE Select trigger mode This function is only available under oscilloscope mode SLOPE Select trigger slope ADJ ratating Adjust parameter selected 5 SEND SCREEN Send screen as bitmap file via serial port The screen right before entering menu will be LEVEL Select trigger level ADJ press Enter MENU sent XModem protocol is used for the transfer Refer to documents at www jyetech com HOLD Enter HOLD HOLD Return to running 6 SEND WAVE DATA Send waveform data as CSV file via serial port The displayed waveform right before ADJ ratating Adjust parameter selected entering menu will be sent XModem protocol is used for
9. the transfer ADJ press Enter MENU gt MENU 7 CHANGE REC LEN Select record length by turning ADJ Record length can be set to 256 512 or 1024 V OSL HO nga ver lee position Puron Nome aes CHANGETRIGPOS Select trigger position by turning ADJ Trigger position can be set to 1 100 of Sen selector1 Change sensitivity ADJ ratating Select menuitem capture buffer Sen selector2 Change sensitivity ADJ press Eee eee 9 TEST SIGNAL Set the frequency and amplitude of test signal Use ADJ to change frequency Press Couple selector Change couple LEVEL to select amplitude oem ied 10 RESTORE DEFAULT 7 f i defaults See the table i for affacted eset parameters to factory defaults See the table in next page for affacted parameters 2 Frequency Meter Mode a a acta y paget p Button Name Function IAD ipes Enter MENU 11 REBOOT Reboot device usually to enter bootloader for firmware upgrading ADJ press Enter MENU HPOS Select FFT size 12 EXIT Exit menu and return to previous state Sen selector1 Change sensitivity SEC DIV Select FFT samplingrate Sen selector 2 Change sensitivity ADJ ratating Adjust parameter selected Couple selector Change couple Sa JYE Tech Ltd www jyetech com Advanced Operations 10X Probe Calibration Due to input capacitance 10X probe must be calibrated for correct a
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