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PoLabs PoScope Basic Скачать руководство пользователя страница 33

 

  

user manual

 

 

 

  

                          web: 

 

 

www.poscope.com

 

 

, mail: 

 

 

[email protected]

 

 

©

   

It is also necessary to note that when concurrently measurnig two channels at the same time the sampling 
frequency doubles as, for example, at Fs = 100 kHz the sampling frequency is actually Fs = 200 kHz.. If 2 
channels are measured at the same time the sampling frequency setup is automatically disabled if higher than 
100 KHz.

31

Содержание PoScope Basic

Страница 1: ...User manual v 1 2 ...

Страница 2: ......

Страница 3: ...5 11 Recorder 16 11 1 Recorder setup 17 12 Logic analyzer PATTERN generator 20 12 1 Concatenation mode 23 12 2 Logic analyzer pattern generator setup 24 13 Generator of PWM and Square signal 26 14 Reading modes 27 15 Information about THE CONTROL knob 29 16 Filter settings 30 17 Sounds 31 18 Statistics 32 19 Upgrading firmware 33 20 Analysis of standard interfaces 34 20 1 UART interface analysis 3...

Страница 4: ...r Generally each device requires a free interface connector usually LPT and requires its own power source In addition functional measurement instrumentation made by known companies is too expensive both for radio amateurs and developers within moderate sized firms At the same time appearance of some new peripheral rich microcontrollers with high speed data communication channel support USB1 which ...

Страница 5: ...sing pulse preset bit sequence edge decoding of UART SPI I2C and 1 Wire interface 5 channel square and PWM signal generator 8 channel pattern generator tabular waveform formatting or direct timing chart plotting with mouse on screen In addition PoScope Basic allows user to Add comments to each measurement to be recorded in the file with the measurement results Save all measurement results as a vec...

Страница 6: ... 24 hours at Fs 100 kS input voltage 20 20 V hardware 2 sub bands ADC capacity 10 bits Logic analyzer number of channels 16 8 if pattern generator is on sample rate 1 kHz 8 MHz memory depth buffer reading Fs 4 8 MHz 128 bit channel buffer reading Fs 2 2 66 MHz 1160 bit channel buffer reading Fs 1 Hz 1544 bit channel buffer reading in concatenation mode 1 Mbit channel pipe reading Fs 500kHz 4К to 2...

Страница 7: ...ng the drivers it is only necessary to determine the operating system whether Windows 98 ME or NT4 2000 XP and start the corresponding batch file from the Driver folder install_win2k_XP bat or install_win98 ME bat If automatic driver installation fails then the drivers must be installed manually via Device Manager Please see the ReadMe txt file for further driver installation information In additi...

Страница 8: ...WARE As seen from picture 4 PoScope Basic has two analog inputs For each of these an AC DC switch is present Picture 4 PoScope Basic from top The logic port pin out is described in picture 5 WARNING Do no use pins marked with asterisk You may destroy your unit 6 ...

Страница 9: ...entre of the main window there is a display for the selected operation mode where all the measurement results are properly displayed Below the display panel there is a settings panel for the selected operation mode At the bottom of the work window there is a status bar where the current device status is displayed e g information about waiting for the measurement as well as a brief program detail p...

Страница 10: ...aving the measurement results of the selected operation mode as a vector graphic in emf format Enhanced Metafile Save as bitmap allows saving the measurement results of the selected operation mode as a bitmap in bmp format Windows Bitmap Print preview opens the preview window of the measurement results of the selected operation mode as they would be printed Print prints the measurement results of ...

Страница 11: ... signal parameters DC and AC voltage and frequency component to be set Parameters may be calculated before processing smoothing and filtering when the real parameters of signal and processing will be calculated Parameter calculation upon processing may be useful if for example it is necessary to determine the parameters of each dual tone spectral component DTMF and for this purpose it is first nec...

Страница 12: ... off or the generator button is released This mode is to eliminate the undesirable signal suppression variation if the corresponding generator channels have accidentally not been disconnected from any elements of the device on test Markers select this menu item allows the generator data portion in the table to be selected where the portion limits are determined by the marker position i e they are ...

Страница 13: ...ns file Save options saves the application options in the file Language submenu of this item allows selecting the available interface languages 8 6 Upgrade menu The Upgrade menu opens the device software firmware upgrade window as well as indicating the version and release date of the current firmware Picture 12 Upgrade menu 8 7 Help menu The Help menu consists of the following items Help opens th...

Страница 14: ...ch complicating their analysis To install one of the nine standard zero positions you need to right click on the corresponding cursor and then select one of the possible zero position values from the pop up menu There are two markers and above the work screen frame that are used to perform the correct measurement of time intervals and voltage amplitude values of each channel The markers can be mov...

Страница 15: ...ggering control elements except for the markers are positioned on the Triggering panel The On Off button allows triggering to be turned on and off The A and B buttons select the channel and corresponding marker for the signal that will be used as the triggering source The Ext button indicates that the external source connected to the logic analyzer s B 5 channel will be the triggering source that ...

Страница 16: ... and perform the measurements for Тs 5 μs Fs 200 kHz as well and if there is not any signal distortion it means that your computer and operating system can transfer data at maximum speed In case of any distortion it is necessary to increase the sampling period e g up to 6 μs 167 kHz and perform the measurements again and so on Upon determining the sampling period with no distortion in the measurem...

Страница 17: ...the signal this flag sets the reference for the triggering markers If reference to the signal is selected the triggering marker will synchronously move within the screen when changing time base or shifting zero while keeping the given position in Volts Filter auto on enables the corresponding filter to be automatically turned on upon setting its parameters Triggering auto on enables triggering to ...

Страница 18: ...express the vertical scale either Volts or dB The second button which is active only if the first one is pressed determines the voltage level that corresponds to 0 dB either 0 775 V or the maximum voltage value along the whole frequency axis for the set channel On the Frequency panel button has been added to determine whether the frequency axis is linear or logarithmic The Triggering panel has bee...

Страница 19: ...f there is no signal distortion then it means that your computer and operating system can transfer data at the maximum speed If there is distortion then it is necessary to reduce the sampling frequency e g up to 190 kHz and perform the measurements once again and so on Upon determining the sampling frequency without distortion in the measurement results it is useful to set it as maximum Memory dep...

Страница 20: ...ge scale range to turn channels on off and to change time base will be disabled This is connected with the real time waveform record and any change would lead to significant CPU usage resulting in a skip of the new data portion In the upper right corner of the Period panel instead of information about the reading mode there is information about immediate waveform plotting in the recording mode if ...

Страница 21: ...rker quickly you need to select the corresponding cell of the table in the marker s color by left clicking it Marker parameters color and comments can be changed in the corresponding pop up menu It is necessary to note that the position of markers and their parameters are saved in the file with the measurement results i e when opening the file all the markers will point to the corresponding wavefo...

Страница 22: ...ng in record mode is disabled The reason to disable or enable plotting within the measurements is that within certain sampling periods e g of 5 μs 200 kHz each second 200 000 dots need to be plotted on the screen which is beyond the capabilities of even advanced computers and at this plotting rate would be an obscure picture on the screen the waveform would be just leaping On the other hand howeve...

Страница 23: ...then points plotted with the same coordinates in pixels on the screen are not displayed Waveform plotting will be much faster if a large waveform portion is shown within a mass compression but if there is an sudden signal variation then it will be shown incorrectly within mass compression Do not show the total record time during the recording if the flag is set and the sampling period is fixed at ...

Страница 24: ...further bus B can be used either in the mode of additional 8 channel logic analyzer or as an 8 channel pattern generator or disabled The operation mode of bus B is set by the corresponding buttons on the control panel Furthermore the color and name of each channel can be changed and for this you need to point to the name of the selected channel with the mouse cursor and left click This will cause ...

Страница 25: ...cted data portion below the generator data table There is also a row of buttons on the generator data panel that allows you to clear the generator data reading the generator data from a file or saving the generator data into the file shifting the selected data portion for backspace character up and down cutting or coping the selected portion in the buffer other than Windows buffer as well as pasti...

Страница 26: ...y value setting is only for the correct display of charts in the time base It makes sense to explain the point of external clocking application with an example Picture 22 Binary waveforms The figure displays the following binary waveforms blue color input line 1 3 red color received shown signal line 2 5 green color external clock signal line 4 In the first case the internal sampling frequency is ...

Страница 27: ...upon meeting triggering condition the required number of missing pulses is set and in the dropdown list positioned beneath the panel the channel is selected for which calculating and missing the given pulses number will be performed It is advised to use the missing pulse detection mode if concatenation mode is off On the Signal parameters below markers panel the position of each marker on the time...

Страница 28: ... main chart solid lines the chart to be pasted dotted lines will appear these are the results of the last measurement with the 48 missing triggering pulses 11 As there are 50 triggering pulses in the main chart but it was missed by 2 it is necessary to shift the chart to be pasted by 2 SCK pulses For this purpose it is necessary to press the left arrow button and keep pressing it until the start o...

Страница 29: ...ised to set it as maximum Theoretically the hardware of the PoScope can transfer data at speed of 1 МBytes sec but practically it will use only 256 kBytes sec as there are not adequate SiLabs drivers avaiable when operating in synchronous mode If the buffer is small then the sampling frequency can be increased up to 400 kHz e g when reading only 4k data there will not be enough time for the FIFO 1...

Страница 30: ...e when any button on the panel Trigger is pressed Skip same bytes during search when this option is active it allows a group of consecutive identical bytes to be skipped when searching For example if bus A contains the bytes AA BB CC AA AA AA DD AA and you need to find sequence АА then on the first press of the search button the marker will point to AA on the second press the marker will point to ...

Страница 31: ...ircuit and perform measurements with oscilloscope or spectral analyzer PWM generator has fixed frequency of 7 8125 kHz It is possible to change Duty cycle from 1 to 100 Square signal generator have fixed duty cycle of 50 Frequency is variable in 8 steps from 3 91 kHz to 1 MHz Because of hardware limitation user settings differ from real value which is displayed Picture 26 How to find generator 29 ...

Страница 32: ...is sufficient When analyzing a tone with a frequency of 50 Hz i e 4000 samples for signal period then less than 1 3 of the period would be displayed which is unacceptable for any analysis The question arises why we use reading with the microcontroller buffer The point is that not all computers are equipped with USB1 1 and Windows 2000 or XP operating systems which ensure general process priority a...

Страница 33: ... when concurrently measurnig two channels at the same time the sampling frequency doubles as for example at Fs 100 kHz the sampling frequency is actually Fs 200 kHz If 2 channels are measured at the same time the sampling frequency setup is automatically disabled if higher than 100 KHz 31 ...

Страница 34: ... 1 Using the mouse when left clicking on the knob cursor takes the form of a hand and moving the mouse but not exactly over the knob When moving the mouse the knob cursor will be positioned along a line drawn from the center of the knob to the mouse cursor position i e Simulating the effect of a mechanical control knob Upon clicking on the knob this element is within the input focus i e can be key...

Страница 35: ...lect it with the mouse cursor which then takes the form of a hand Then left click and start moving the reference point in the desired direction while keeping the left mouse button pressed When moving the reference point the current coordinates will be shown on the status panel gain and frequency factors To delete the reference point select it with the mouse cursor and left click while holding the ...

Страница 36: ... selecting one of the standard sounds or pressing the relative button with an open file icon and selecting the required sound file To listen to the selected sound it is necessary to press the corresponding button positioned on the same bar with event name with loudspeaker icon All standard sounds are played through the PC s built in speaker selected sound files are played when using the computer s...

Страница 37: ... channels number of rising front and falling rear edges of the measured channel and then minimum maximum average length of signal pulse and pause at which the average length is calculated for the whole signal but as arithmetic average between minimum and maximum length and average signal frequency Change in any data of the logic analyzer or pattern generator immediately leads to recalculation of a...

Страница 38: ...file by pressing the Open button and then the Upgrade button becomes active Information about the firmware file size and its version will be displayed When opening the file and there are not any error messages you can press the Upgrade button Then the device firmware upgrade starts automaticilly A progress indicator will give an information about the upgrade status that is positioned just higher t...

Страница 39: ... in the video capture board It take us three and half hours to manually decode 48 bytes All this was done on paper of coure subject to any error When decoding the same interface with a program on PC prototype model of the logic analyzer the whole communication cycle of 1026 bytes was analyzed in 8 minutes but it took one and a half days to write the analysis program for I2C It does not mean that w...

Страница 40: ...is of the timing chart of the channel RxD and if possible corrected on the basis of the standard series of speeds Upon determining the communication rate it may be a good practice to set the values of other interface settings correctly which cannot be determined automatically The most common settings of UART interface are set as default Upon setting all the parameters it is desirable to set marker...

Страница 41: ...a long pulse pause appears in SCK channel which length has to differ sufficiently from adjacent pulses pause If a long pulse is found then SCK channel level in the standby mode is high i e triggering must be on the falling edge if a long pause is found then SCK channel level in the standby mode is low and triggering must be on the rising edge Before you start measuring it may be good practice to t...

Страница 42: ... of SCL and SDA lines will be always high because of the pull up resistors That s why it is advised to turn on triggering on the falling edge for the channel SDA Before you start measuring it may be a good practice to turn off the device to be analyzed and then press the Start button and then to turn on the device If triggering is set correctly then the start of timing charts will show start of co...

Страница 43: ...in 15 60 μs low level for 15 60 μs in the case of only one slave on the bus Upon receiving the confirmation signal the master transmits one or more bytes high order bits go first and the slave responds to the master as required As the session starts when the DQ line goes from high to low then it is advisedto turn on triggering as to the falling edge Before you start measuring it may be prudent to ...

Страница 44: ...r I2C mode are supported 1 Master Transmitter i e we notify that we shall transmit the data 2 Master Receiver i e we notify that we shall receive the data 3 Slave Receiver i e we are notified that we have to receive the data 4 Slave Transmitter i e we are notified that we have to transmit the data It is also possible to set the number of receiving transmitting bytes Slave addresses and transfer sp...

Страница 45: ...lower the computer the longer these steps will take This means that the delay shall be longer as well approximately equal to the communication timeout When increasing any timeout it is necessary to increase delay after reset as well The value of wait_reset_trigger determines time to reset the device if the triggering parameters are changed and the device shows no response i e it hung We can explai...

Страница 46: ...o labs gmail com out of operation then it is kindly recommended to set the value of this parameter to 1 and send me the error codes but if it runs satisfactorily then you can disable this function and set the value of the parameter to 0 44 ...

Страница 47: ... operation mode Ctrl Q Closes program Shift Ctrl C Copies the measurement results of the selected operation mode as vector graphic in emf format Enhanced Metafile to the Windows buffer Shift Ctrl X Copies the measurement results of the selected operation mode as bitmap in bmp format Windows Bitmap to the Windows buffer Ctrl N Clears the measurement results of the selected operation mode Ctrl R Ope...

Страница 48: ...user manual web www poscope com mail po labs gmail com 24 HARDWARE ISSUE There are not known hardware issues since Software and Firmware version 3 1 46 ...

Страница 49: ...ounterparts It not only saves your money but also saves The Earth All PoLabs products are produced with ROHS compliant parts and packed with recyclable or recycled packing materials PoLabs recognizes its responsibility as a global citizen and is continually working to reduce the environmental impact of the products we create PoLabs products are produced under ROHS directive http europa eu int eur ...

Страница 50: ...n a computer that may be running other software products For this reason one of the conditions of the license is that it excludes usage in mission critical applications for example life support systems Viruses This software was continuously monitored for viruses during production but you are responsible for virus checking the software once it is installed Support If you are dissatisfied with the p...

Страница 51: ...ge For computers that do not have an earth connection for example laptops it must be assumed that PoScope Basic is not protected by an earth in the same way a battery multimeter is not protected by an earth The maximum input voltage range of any input is 20 to 20V Any voltage in excess of 30V may cause permanent damage to the oscilloscope or your computer The unit contains no user serviceable part...

Страница 52: ... WITH SUCH UNINTENDED OR UNAUTHORIZED USE EVEN IF SUCH CLAIM ALLEGES THAT RCL WAS NEGLIGENT REGARDING THE DESIGN OR MANUFACTURE OF THE PRODUCT PLEASE CHECK WITH LOCAL RULES REGULATIONS IN YOUR COUNTRY BEFORE USE OF THE PRODUCT 9 MEMBER ACKNOWLEDGES THAT MEMBER HAS READ THIS AGREEMENT AND AGREES TO ALL ITS TERMS AND CONDITIONS MEMBER UNDERSTANDS THAT ELECTRONICS INFOLINE MAY AT ANY TIME DIRECTLY OR...

Страница 53: ...de except former USSR countries PoScope Basic is made calibrated and tested in Slovenia PoLabs provides technical support customer service and manufacturer s warranty of the PoScope Basic worldwide except former USSR countries 27 1 Contact If you have any questions feel free to ask by e mail po labs gmail com or visit www poscope com Copyright 2004 2008 PoLabs 51 ...

Страница 54: ...web www poscope com email po labs gmail com ...

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