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22.1. Selecting a FFT Window

The FFT feature provides four windows. Each one is a trade-off between frequency resolution and magnitude

accuracy. What you want to measure and your source signal characteristics help you to determine which

window to use. Use the following guidelines to select the best window.

Type

Description

Window

Rectangle

This is the best type of window for resolving frequencies that

are very close to the same value but worst for accurately

measuring the amplitude of those frequencies. It is the best

type for measuring the frequency spectrum of nonrespetitive

signals and measuring frequency components near DC.

Use rectangle for measuring transients or bursts where the

signal level before and after the event are nearly equal. Also,

use this window for equal-amplitude sine waves with

frequencies that are very close and for broadband random

noise with a relatively slow varying spectrum.

Hamming

This is a very good window for resolving frequencies that are

very close to the same value with somewhat improved

amplitude accuracy over the rectangle window. It has a slightly

better frequency resolution than the Hanning.

Use Hamming for measuring sine, periodic and narrow band

random noise. This window works on transients or bursts

where the signal levels before and after the event are

significantly different.

Hanning

This is a very good window for measuring amplitude accuracy

but less so for resolving frequencies.

Use Hanning for measuring sine, periodic, and narrow band

random noise. This window works on transients or bursts

where the signal levels before and after the event are

significantly different.

Blackman

This is the best window for measuring the amplitude of

frequencies but worst at resolving frequencies.

Use Blackman-Harris for measuring predominantly single

frequency waveforms to look for higher order harmonics.

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Содержание 1190

Страница 1: ...PeakTech 1190 1230 Operation manual Digital Oscilloscope with 16 CH logic analyzer ...

Страница 2: ...max voltages If it is not possible to exclude without that impulses transients disturbance or for other reasons these voltages are exceeded a suitable presale 10 1 must be used Replace a defective fuse only with a fuse of the original rating Never short circuit fuse or fuse holding Disconnect test leads or probe from the measuring circuit before switching modes or functions Check test leads and pr...

Страница 3: ...anana plug connectors Do not insert metal objects into connectors Periodically wipe the cabinet with a damp cloth and mid detergent Do not use abrasives or solvents The meter is suitable for indoor use only Do not store the meter in a place of explosive inflammable substances Opening the equipment and service and repair work must only be performed by qualified service personnel Do not place the eq...

Страница 4: ...ar on the products High Voltage Please Consult the Manual Protective Ground End Earth End on the Shell Grounding End for Measurement To avoid body damage and prevent product and connected equipment dam This product can only be used in the specified applications Carefully read the following safety information before using the test tool Warning The channels of the oscilloscope are non isolated elect...

Страница 5: ...ing function provided capable of fast setting Multiple waveform calculation function Built in FFT function Implementation of detecting the average and peak values of the waveform Digital real time oscilloscope Edge video pulse slope and alternate triggering function USB communication ports Different continuous displaying time Multiple Language User Interface English German Chinese 3 2 Logic Analyz...

Страница 6: ...s are included The knobs have the functions similar to other oscilloscopes The 5 buttons in the column on the right side of the display screen are menu selection buttons defined as F1 to F5 from top to bottom respectively through which you can set the different options for the current menu The other pushbuttons are function buttons through which you can enter different function menus or obtain a s...

Страница 7: ...s are idle and 6 F refer to different Oscilloscope function menu For LA 3 4 5 6 7 refers to figure and other keys refer to digit or function menu 4 Vertical control area It s including 3 keys and 4 knobs For Oscilloscope CH1 menu and CH2 menu correspond to setting menu in CH1 and CH2 Wave Math key refer to math menu the math menu consists of six kinds of operations including CH1 CH2 CH2 CH1 CH1 CH...

Страница 8: ... refer to trigger menu control Trig adjust knob to adjust trigger position in memory SET 50 is to set trigger position as 50 and SET Zero set trigger position as 0 4 3 User interface introduction Fig 3 Illustrative Drawing of Display Interfaces 1 The Trigger State indicates the following information Auto The oscilloscope is under the Automatic mode and is collecting the waveform under the non trig...

Страница 9: ...ling Ground indicates GND coupling 16 The reading shows the vertical scale factor the Voltage Division of the CH2 channel 17 The icon indicates the coupling mode of the CH1 channel The icon indicates the direct current coupling The icon indicates the AC coupling The icon Ground indicates GND coupling 18 The reading indicates the vertical scale factor the Voltage Division of the CH1 channel 19 The ...

Страница 10: ...n button to call out the function Recall Factory The default attenuation coefficient set value of the probe in the menu is 10X 2 Set the Switch in the Oscilloscope Probe as 10X and Connect the Oscilloscope with CH1 Channel Align the slot in the probe with the plug in the CH1 connector BNC and then tighten the probe with rotating it to the right side Connect the probe tip and the ground clamp to th...

Страница 11: ...u as 10X and that of the switch in the probe as 10X and connect the oscilloscope probe with the CH1 channel If a probe hook tip is used ensure that it keeps in close touch with the probe Connect the probe tip with the signal connector of the probe compensator and connect the reference wire clamp with the ground wire connector of the probe connector and then press the button 7 AUTOSET 2 Check the d...

Страница 12: ...of the probe switch are 1X and 10X see Fig 7 Fig 7 Attenuation Switch Note When the attenuation switch is set to 1X the probe will limit the bandwidth of the oscilloscope in 5MHz If it is needed to use the whole bandwidth of the oscilloscope the switch must be set to 10X 8 How to Implement Auto calibration The auto calibration application can make the oscilloscope reach the optimum condition rapid...

Страница 13: ...ent of the signal through the observation of the difference between the wave form and the signal ground If the channel is under the AC mode the DC component will be removed by filtration This mode helps you display the AC component of the signal with a higher sensitivity 2 Change the Vertical Setting and Observe the Consequent State Information Change With the information displayed in the status b...

Страница 14: ...it can be found that the Horizontal Time Base display in the status bar changes accordingly The horizontal scanning speed steps from 2ns up to 100s in the sequence of 1 2 5 2 Use the HORIZONTAL POSITION knob to adjust the horizontal position of the signal in the waveform window The HORIZONTAL POSITION knob is used to control the triggering displacement of the signal or for other special applicatio...

Страница 15: ...ange the trigger level setting With the rotation of the LEVEL knob it can found that the trigger indicator in the screen will move up and down with the rotation of the knob With the movement of the trigger indicator it can be observed that the trigger level value displayed in the screen changes 3 Press the button SET TO 50 to set the trigger level as the vertical midpoint values of the amplitude o...

Страница 16: ... binary system value for the channel position in current cursor 3 Battery powers indicate indicate battery power when battery inside 4 Decimal system value indicates the position of current cursor in storage area 5 Yellow dashed line indicates current cursor 6 Blue dashed line indicates current trigger position 7 Percentage value indicates current trigger position in storage area 8 Sample data are...

Страница 17: ...from the probes Then each time clock occurs the data will be sampled Then sampled data is sent to trigger function block and store in main memory The trigger program checks specific events with the sampled data and take specific action The trigger program can check events as rising edge data values and data ranges etc LA module enables a post trigger delay counter when trigger reach specified valu...

Страница 18: ...quency is 1M data width is 32 digits every clock corresponds to one data Signal voltage is 3 3V 16 Display systems We need only three channels as what we measure is 3 signals And other channel and bus can be off In this way the display resolution in using channel will be increased Display system mainly to set on off for measure channel We use CH00 CH01 CH02 as measure channel correspond to signal ...

Страница 19: ...Fig 12 Fig 13 135 ...

Страница 20: ...trigger mode as falling edge trigger position in 50 Trigger system setting steps as below 1 Press Trig menu and menu appears 2 Press F1 till trigger mode display as Edge 3 Press F2 or turn CH1 Volts Div till trigger sources display as CH00 4 Press F3 till trigger type display as Falling 5 Turn Trigger adjust knob or press SET 50 till NEXT T POS window display as 50 Then trigger system setting fini...

Страница 21: ...VMOS etc And you can set any trigger voltage using custom setting The signal voltage is 3 3V and we set threshold voltage as LVCMO3 3 1 7V as below steps 1 Press 1 Threshold key and the menu appears 2 Press F1 key till Channel display as CH00 CH03 3 Press F2 key till threshold display as LVCMOS3 3 1 7V Then the threshold setting is finished ref to Fig 16 Fig 16 137 ...

Страница 22: ...of the Logic Analyzer is fixed and once adding sample rate then resolution will get better accordingly But it will decrease the continuance for acquire signal In a word sample rate are quicker than the continuance for recorded signal will get smaller but with better resolution Sampling system can set difference sample rate and storage depth We use 10 times sampling rate to measure the signal clock...

Страница 23: ...2 MENU and MATH MENU and four knobs such as VERTICAL POSITION VOLTS DIV one group for each of the two channels Setting of CH1 and CH2 Every channel has an independent vertical menu and each item is set respectively based on the channel With the CH1 MENU or CH2 MENU menu button pushed down the system shows the operation menu of the corresponding channel see Fig 19 Fig 19 Channel Setting Menu 139 ...

Страница 24: ... The wave form is displayed normally Initiate the wave form inverted function 1 Setting Channel Coupling Taking the Channel 1 for example the measured signal is a square wave signal containing the direct current bias The operation steps are shown as below 1 Press the CH1 MENU button and call out the CH1 SETUP menu 2 Press the F1 menu selection button and select the Coupling item as AC to set the c...

Страница 25: ...he Band Limit as ON 20MHz with Channel 1 Band Limit is switched on 3 Setting the Channel ON OFF Taking the Channel 1 for example the operation steps are shown as below 1 Press the CH1 MENU button and call out the CH1 SETUP menu 2 Press the F3 menu selection button and select the Channel as OFF with Channel 1 switched off 3 Press F3 menu selection button again select the channel as ON with Channel ...

Страница 26: ...e measured data Take the Channel 1 as an example the attenuation coefficient of the probe is 10 1 the operation steps is shown as follows 1 Press the CH1 MENU button access CH1 SETUP menu 2 Press the F4 menu selection button and select 10X for the probe The Fig 23 illustrates the setting and the vertical scale factor when the probe of the attenuation coefficient of 10 1 is used Fig 23 Regulation o...

Страница 27: ...s 1 Press the CH1 MENU button and get access to the CH1 SETUP menu 2 Press the F5 menu selection button and select ON in the Inverted The wave form inverted function is initiated 3 Press the F5 menu selection button again and select OFF for Inverted item The function of wave form inverted is closed off For the screen display see Fig 24 and Fig 25 Fig 24 Wave Form not inverted Fig 25 Wave Form Inve...

Страница 28: ...e Channel 2 wave form CH1 CH2 Add the Channel 1 wave form to the Channel 2 CH1 CH2 Multiply Channel 1 wave form by Channel 2 wave form CH1 CH2 Channel 1 wave form is divided by the Channel 2 wave form FFT Waveform of Corresponding FFT operation Taking the additive operation between Channel 1 and Channels 2 for example the operation steps are as follows 1 Press the MATH MENU button and call out the...

Страница 29: ...mat dB Vrms Select dB for Format Select Vrms for Format Zoom 1 2 5 10 Set multiple 1 Set multiple 2 Set multiple 5 Set multiple 10 Taking the FFT operation for example the operation steps are as follows 1 Press the MATH MENU button and call out the WAVE MATH menu 2 Press F1 to turn on off FFT after entering FFT menu and please note that FFT is prohibited in Window setting mode The green waveform F...

Страница 30: ... very close and for broadband random noise with a relatively slow varying spectrum Hamming This is a very good window for resolving frequencies that are very close to the same value with somewhat improved amplitude accuracy over the rectangle window It has a slightly better frequency resolution than the Hanning Use Hamming for measuring sine periodic and narrow band random noise This window works ...

Страница 31: ...Fig 27 28 29 30 show four kinds of window function referring to sine wave of 1KHz Fig 27 Blackman window Fig 28 Hamming window Fig 29 Rectangle window 147 ...

Страница 32: ...ngle shot events set the oscilloscope acquisition mode to average 22 3 Term interpretation Nyquist frequency The highest frequency that any Real Time Digital Oscilloscope can measure is exactly half of the sampling rate under the condition of no mistakes which is called Nyquist frequency If under sampling occurs when the frequency sampled is higher than Nyquist frequency False Wave phenomenon will...

Страница 33: ...he vertical resolution of the wave forms of all channels including those obtained from the mathematical manipulation which can determine the sensitivity of the vertical division with the sequence of 1 2 5 The vertical sensitivity goes up when the knob is rotated clockwise and goes down when the knob is rotated anticlockwise 3 When the vertical position of the channel wave form is adjusted the scre...

Страница 34: ...is used to set the horizontal scale factor for setting the main time base or the window 3 HORIZONTAL MENU button with this button pushed down the screen shows the operating menu see Fig 32 Fig 32 Time Base Mode Menu The description of the Horizontal Menu is as follows Function Menu Setting Description Main Time Base The setting of the horizontal main time base is used to display the wave form Set ...

Страница 35: ...s Fig 33 Fig 33 Main Time Base 26 Set Window Press the F2 menu selection button and choose Set Window The screen will show a window area defined by two cursors In this case the HORIZONTAL POSITION and SEC DIV knobs can be used to adjust the horizontal position and size of this window area see Fig 30 a Press F2 menu button under the FFT mode it will notice FFT mode disable See Fig 34 Fig 34 Window ...

Страница 36: ...de disable 27 Window Expansion Press the F3 menu selection button and choose Zone Window As a result the window area defined by two cursors will be expanded to the full screen size see Fig 36 Fig 36 Zone Window 152 ...

Страница 37: ...Force trig Force to a trigger signal and mainly to use in Normal and Single mode SET Zero Trigger horizontal position set to Zero Trig menu Press this key and panel display menu There are two trigger modes single trigger and alternate trigger Single trigger Use a trigger level to capture stable waveforms in two channels simultaneously Alternate trigger Trigger synchronous signals steadily The two ...

Страница 38: ... the rising or falling edge of the input signal The Edge Trigger Menu is shown as Fig 37 Fig 37 Edge trigger menu Edge menu list MENU SETTING INSTRUCTION Source CH1 CH2 EXT EXT 5 Select CH1 as the trigger source Select CH2 as the trigger source Ext trigger Ext trigger divide to 5 and extend trigger level range Mode Edge Set vertical channel trigger type for edge trigger Slope Rising Falling Trigge...

Страница 39: ...y portion pass Holdoff 100ns 10s Turn TRIG LEVEL knob to set time slot before another trigger event Holdoff Reset Reset hold time to 100ns Follow up below step to set CH1 as rising slope edge trigger and trigger mode is auto coupling is DC 1 Press Trig menu 2 Press F1 to choose type as Single 3 Press F2 to choose source as CH1 4 Press F3 to choose mode as Edge 5 Press F4 to choose slope as Rising ...

Страница 40: ...Fig 38 Edge trigger Rising Wave the first menu Fig 39 Edge trigger Rising Wave the second menu 156 ...

Страница 41: ...gger divide to 5 to extend trigger level range Mode Video Sync Line Field Odd Field EvenField Designed Line Synchronic trigger in video line Synchronic trigger in video field Synchronic trigger in video odd filed Synchronic trigger in video even field Synchronic trigger in designed video line to Next menu Back to previous menu MODU NTSC PAL SECAM Video modulation setting Holdoff 100ns 10s Turn TRI...

Страница 42: ...oose synchronization as Line refer to Fig 41 6 Press F5 to Next menu 7 Press F2 to choose modulation as NTSC Fig 41 Video field trigger Oscillogram 28 3 Pulse Width Trigger Pulse trigger occurs according to the width of pulse The abnormal signals can be detected through setting up the pulse width condition The Pulse Width Trigger Menu is shown as Fig 42 Fig 42 Pulse Width Trigger menu 158 ...

Страница 43: ...rigger mode Auto Normal Single Acquire waveform whatever detect trigger condition or not Only acquire waveform when match trigger condition Only acquire waveform for single time when detect trigger condition then stop Coupling AC DC HF LF Not allow DC portion to pass Allow all portion pass Not allow high frequency of signal pass and only low frequency portion pass Not allow low frequency of signal...

Страница 44: ...Settings 24ns 10s Turn TRIG LEVEL knob to set slope time High level Turn TRIG LEVEL knob to set the High level Low level Turn TRIG LEVEL knob to set Low level Slew rate Slew rate High level Low level Settings Trigger mode Auto Normal Single Acquire waveform whatever detect trigger condition or not Only acquire waveform when match trigger condition Only acquire waveform for single time when detect ...

Страница 45: ...Trigger Type Edge Menu list MENU SETTING INSTRUCTION Source CH1 CH2 Select CH1 as the trigger source Select CH2 as the trigger source Mode Edge Set vertical channel trigger type for edge trigger Slope Rising Falling Trigger in signal rising edge Trigger in signal falling edge Coupling AC DC HF LF Not allow DC portion to pass Allow all portion pass Not allow high frequency of signal pass and only l...

Страница 46: ...er source Ext trigger Ext trigger divide to 5 to extend trigger level range Mode Video Sync Line Field Odd Field EvenField Designed Line Synchronic trigger in video line Synchronic trigger in video field Synchronic trigger in video odd filed Synchronic trigger in video even field Synchronic trigger in designed video line Modulation NTSC PAL SECAM Video modulation setting Holdoff 100ns 10s Turn TRI...

Страница 47: ...se width more than Pulse width equal to Pulse width less than Pulse width more than Pulse width equal to To select pulse width condition settings 24ns 10s Turn TRIG LEVEL knob to set time Coupling AC DC HF LF Not allow DC portion to pass Allow all portion pass Not allow high frequency of signal pass and only low frequency portion pass Not allow low frequency of signal pass and only high frequency ...

Страница 48: ...e than Negative pulse and less than Negative pulse and equal to settings 24ns 10s Turn TRIG LEVEL knob to set slope time High level Turn TRIG LEVEL knob to set the High level Low level Turn TRIG LEVEL knob to set Low level Slew rate Slew rate High level Low level Settings Coupling AC DC HF LF Not allow DC portion to pass Allow all portion pass Not allow high frequency of signal pass and only low f...

Страница 49: ...in phase Normal trigger mode In this mode the oscilloscope cannot detect the curve before it is triggered Without trigger the oscilloscope displays the original curve without new curves are recorded Single mode In this mode the oscilloscope detects a trigger and captures the curve whenever the operator presses the RUN STOP Run Stop button Sensitivity Trigger circuit with delay line to avoid effect...

Страница 50: ...e allows the oscilloscope to acquire waveforms even when it does not detect a trigger condition If no trigger condition occurs while the oscilloscope is waiting for a specific period as determined by the time base setting it will force itself to trigger Normal The Normal mode allows the oscilloscope to acquire a waveform only when it is triggered If no trigger occurs the oscilloscope keeps waiting...

Страница 51: ...een shown as Fig 49 Fig 49 ACQU MODE Menu The description of the Sampling Setup Menu is shown as follows Function Menu Setting Description Sample General sampling mode Peak Detect It is used for the detection of the jamming burr and the possibility of reducing the confusion Average It is used to reduce the random and don t care noises with the optional number of averages Averages 4 16 64 128 Choos...

Страница 52: ...ling edge of the square wave can be detected and the noise is heavy Fig 51 Common ACQU Mode display in which no burr can be detected Fig 52 The displayed wave form after the noise is removed under the Average Mode in which the average number of 16 is set 168 ...

Страница 53: ... vector form Only the sampling points are displayed Persist OFF 1sec 2sec 5sec Infinite Set the persistence time for each sampling point Format YT XY Show the relative relation between the vertical voltage and the horizontal time Channel 1 is displayed on the horizontal axis and Channel 2 on the vertical axis FFT mode disable Carry Bitmap Vectors The data transmitted as screenshot is in bitmap BMP...

Страница 54: ... button pushed down you can shift between Vectors and Dots types The differences between the two display types can be observed through the comparison between Fig 54 and Fig 55 Fig 54 Display in the Vector Form Fig 55 Display in Dots form 170 ...

Страница 55: ...able to Channel 1 and Channel 2 After the XY display format is selected Channel 1 is displayed in the horizontal axis and Channel 2 in the vertical axis the oscilloscope is set in the un triggered sample mode the data are displayed as bright spots and the sampling rate is 1MS s and cannot be changed The operations of all control knobs are as follows The Vertical VOLTS DIV and the Vertical POSITION...

Страница 56: ...Set Menu 2 Press the F3 menu selection button and choose the form as XY The display format is changed to be XY mode see Fig 57 Fig 57 XY Display Mode At the mode of FFT if switching YT to XY FFT MODE is unavailable prompts as Fig 58 Fig 58 FFT mode XY Format Disable 172 ...

Страница 57: ...ce in the selected address CH X X A B C oder D OFF ON Switch on or off the display of the stored waveform The PeakTech 1190 1230 oscilloscopes can store four waveforms which can be displayed with the current waveform at the same time The stored waveform called out cannot be adjusted In order to save the waveform of the channel CH1 into the address A the operation steps should be followed 1 Press t...

Страница 58: ...The voltage level and time base level will also be shown at the upper left corner of the display area at the same time see Fig 60 Fig 60 Wave Saving Fig 61 FFT wave Saving 174 ...

Страница 59: ...Menu The description of the Auxiliary Function Menu is shown as the following table Function Menu Setting Description System Status Display the system function menu Recall Factory Call out the factory settings Do Self Cal Carry out the self calibration procedure Language Chinese English German Choose the display language of the operating system 175 ...

Страница 60: ...F3 menu selection button and choose Auto calibration After confirming it is all set push down F3 button and choose Do Self Cal entering the self calibration procedure of the instrument 37 System Status SYS STAT Press the F1 menu selection button and choose System Status item The menu pops up in the screen as Fig 63 Fig 63 SYS STAT Menu The SYS STAT menu is described as the following table Function...

Страница 61: ...sponding parameters shown in the screen If press the F1 menu selection button and choose the function item Horizontal the Horizontal System State will be displayed in the screen Press any other function button and exit from the SYS STAT menu see Fig 64 Fig 64 Horizontal System State 177 ...

Страница 62: ...s of measurements and 4 measurement results can be displayed simultaneously Press the F1 menu selection button to choose Source or Type menu You can choose the channel to be measured from the Source menu and choose the measurement Type Freq Period Mean PK PK and Cyc RMS The menu is displayed as Fig 65 Fig 65 Measure Menu 178 Quelle Typ Anzeige ...

Страница 63: ...pulse in the 50 amplitude points Delay 1 2 The delay between the two channels at the rising edge Delay 1 2 The delay between the two channels at the falling edge Duty Duty Cycle defined as Width Period Duty Duty Cycle defined as Width Period 39 Measure Four automatic measured values can be detected on each channel simultaneously Only if the waveform channel is in the ON state can the measurement b...

Страница 64: ...nt 40 How to Implement the Cursor Measurement Press the CURSOR button to display the cursor measurement function menu CURS MEAS in the screen the Cursor Measurement for normal model The cursor measurement includes Voltage Measurement and Time Measurement at normal model shown as Fig 67 Fig 67 CURS MEAS Menu 180 ...

Страница 65: ...ion of Cursor 1 can be adjusted with the CURSOR1 VERTICAL POSITION knob of Channel 1 and that of Cursor 2 can be adjusted with the CURSOR2 VERTICAL POSITION knob of Channel 2 Perform the following operation steps for the voltage cursor measurement of the channel CH1 1 Press CURSOR and recall the CURS MEAS menu 2 Press the F1 menu selection button to choose Voltage for Type with two purple dotted l...

Страница 66: ...Adjust the positions of CURSOR1 and CURSOR2 according to the measured waveform with the period and frequency of Cursor1 and Cursor 2 displayed in the increment window The current position of Cursor1 is displayed in the Cursor1 window and that of Cursor2 is displayed in the Cursor2 window see Fig 69 Fig 69 Wave Form of Cursor Measurement The Cursor Measurement for FFT model Press the CURSOR button ...

Страница 67: ...t the cursor measurement the position of Cursor 1 can be adjusted with the CURSOR1 VERTICAL POSITION knob of Channel 1 and that of Cursor 2 can be adjusted with the CURSOR2 VERTICAL POSITION knob of Channel 2 Perform the following operation steps for the Vamp cursor measurement 1 Press CURSOR and recall the CURS MEAS menu 2 Press F1 and choose Vamp for Type with two purple dotted lines displayed a...

Страница 68: ...Cursor2 window see Fig 72 Fig 72 wave of Freq cursor measurement 41 How to use Autoscale The function is applied to follow up signals automatically even if the signals change at any time Autoscale enables the instrument to set up trigger mode voltage division and time scale automatically according to the type amplitude and frequency of the signals The menu is as follows Function Menu Setting Instr...

Страница 69: ...on the right of the screen 2 Press F1 and choose ON 3 Press F2 and choose Horizontal Vertical for Mode item 4 Press F3 and choose for Wave item Then the wave is displayed in the screen shown as Fig 73 Fig 73 Autoscale Horizontal Vertical multi period waveforms Fig 74 Autoscale Horizontal Vertical mono period waveform 185 ...

Страница 70: ...g or Coupling settings 5 At the mode of Autoscale if adjust the vertical position voltage division trigger level or time scale of CH1 or CH2 the oscilloscope will turn off Autoscale function and if press AUTOSET again the oscilloscope will enter into Autoscale 6 Turn off the submenu at the Autoscale menu the Autoscale is off and turn on the submenu still enters into the function 7 When video trigg...

Страница 71: ... sampling Note Under the Stop state the vertical division and the horizontal time base of the waveform can be adjusted within a certain range in other words the signal can be expanded in the horizontal or vertical direction When the horizontal time base equal to or is less than 50ms the horizontal time base can be expanded for 4 divisions downwards U DISK COPY Insert U disk into USB port then pres...

Страница 72: ...o low narrower pulse signal may get lost So the sample rate and storage depth should be set correctly according to the actual measuring signal Press E ACQU and display menu as the Fig 75 Fig 75 Sampling menu Function Setting Instruction Sample rate P 1190 20 Sa s 500 MSa s P 1230 20 Sa s 1 GSa s Storage depth Low memory General Deep memory Storage depth of 16K Storage depth of 256K Storage depth o...

Страница 73: ...s 10 24 ms 160 ms 2 kHz Low Memory General High Memory 8 s 128 s 2000 s 12 5 MHz Low Memory General High Memory 1 28 ms 20 48 ms 320 ms 1 KHz Low Memory General High Memory 16 s 256 s 4000 s 5 MHz Low Memory General High Memory 3 2 ms 51 2 ms 800 ms 500 Hz Low Memory General High Memory 32 s 512 s 8000 s 2 5 MHz Low Memory General High Memory 6 4 ms 102 4 ms 1 6 s 200 Hz Low Memory General High Me...

Страница 74: ...d refer to Fig 76 Fig 76 Sampling setting 43 2 How to set trigger system Trigger system including Trigger level adjust knob Trigger menu SET 50 Set to Zero Trig level adjust knob is to adjust trigger position Since the digital storage depth is fixed so the proportion of storage data between pre trigger points and re trigger ones depend on trigger position Trigger mode including Edge trigger bus tr...

Страница 75: ...er Trigger on the rising edge Trigger on the falling edge Trigger either on rising edge or falling edge For example To measure a 3 lines SPI signal which includes enable clock and data The data get into effective when enable is low voltage We use CH00 CH01 CH02 to measure the data CH00 to measure enable signal CH01 and CH02 to measure clock and data Trigger setting steps as below 1 Press Trigger m...

Страница 76: ...efer to Fig 78 and ready for data acquisition Fig 78 Edge trigger setting 2 BUS trigger Set BUS as trigger source and make data on BUS as the trigger condition to make trigger BUS trigger menu refer to Fig 79 Fig 79 Bus trigger menu 192 ...

Страница 77: ...as 0X18 how the data changed before and after We set the BUS0 to include CH00 CH07 and use channel CH00 CH07 to measure the signal Trigger setting steps as below 1 Press Trigger menu and menu appears 2 Press F1 till trigger mode display as Bus 3 Press F2 till signal source display as BUS0 4 Press F3 and data in code type as red background and green digital indicator on then insert data value 18 an...

Страница 78: ... Pattern trigger menu Pattern trigger menu as below Function Setting Instruction Channel choice CH00 CH0F x0100000 00000000 Select the channel to set signal pattern 16 channel status indicator X don t care 0 low 1 high CH00 CH0F Don t Care Low High No trigger occur Trigger occur when signal on the low level Trigger occur when signal on the high level 194 ...

Страница 79: ...e display as Pattern 3 Press F2 or turn CH1 Volts div knob till CH SEL display as CH00 4 Press F3 till F3 window display as CH00 High and CH00 in F2 window display as 1 5 Repeat operation of step D and set CH01 CH02 to High and CH03 as Low CH04 CH0F set as Don t care Pattern trigger setting finished refer to Fig 82 and ready for data acquisition Fig 82 Pattern trigger 195 ...

Страница 80: ...equential queue trigger Sequential queue trigger function as below Function Setting Instruction Source BUS0 BUS3 Select the trigger source from BUS0 BUS3 Code 0x0000 0xffff HEX 0 65535 DEC Can be set discretionarily between 0x0000 and 0xffff HEX or between 0 and 65535 DEC according to the bus and code setting Add Add the code type to the queue Delete Delete the code type from the queue 196 ...

Страница 81: ...lue 0X9999 and set code as 0X9999 Press F3 again and red background disappeared Repeat operation of step D if setting error or need to be modified 5 Press F4 and add setting value into the trigger queue then info window will display the value of 0X9999 6 Repeat the operation of step D E and add 0X9998 0X9997 0X9996 to trigger queue Then info window will display value of 0X9999 0X9998 0X9997 0X9996...

Страница 82: ... Distributed queue trigger function as below Function Setting Instruction Source BUS0 BUS3 Select the trigger source from BUS0 BUS3 Code 0x0000 0xffff HEX 0 65535 DEC Can be set discretionarily between 0x0000 and 0xffff HEX or between 0 and 65535 DEC according to the bus and code setting Add Add the code type to the queue Delete Delete the code type from the queue Setting operation are same as seq...

Страница 83: ...65535 DEC Can be set discretionarily between 0x0000 and 0xffff HEX or between 0 and 65535 DEC according to the bus and code setting Duration 10 ns 50 s The duration width can be set from 10ns 1 2 5 to 10 00us 1 2 5 according to the sampling rate from high to low Qualifier Trigger occur on condition that the bus value is equal to the code type and the duration is more than or equal to the duration ...

Страница 84: ...a in code type as red background and green digital indicator on then insert data value 0X99 Press F3 again and red background disappeared Repeat operation of step D if setting error or need to be modified 5 Press F4 and duration in menu setting window correspond to F4 display red background Turn CH1 Volts Div knob and set duration as 50ns 6 Press F5 till qualifier display as 7 Turn Trigger level a...

Страница 85: ...ing Instruction CH SEL CH00 CH03 CH04 CH07 CH08 CH0B CH0C CH0F 16 channels can be divided into 4 groups to have individual setting Threshold voltage CMOS 2 5V LVCMOS3 3 1 7V LVCMOS2 5 1 3V LVCMOS1 8 0 9V Custom CMOS level and set threshold voltage as 2 5V LVCMOS3 3V level and set threshold voltage as 1 7V LVCMOS2 5V level and set threshold voltage as 1 3V LVCMOS1 8V level and set threshold voltage...

Страница 86: ...ars 2 Press F1 till channel source display as CH00 CH03 3 Press F2 to choose threshold as CMOS 2 5V 4 Press F1 till channel source display as CH04 CH07 5 Press F2 to choose threshold as custom Menu setting correspond to F3 display the setting voltage value 6 Turn CH1 Volts div knob and set voltage value as 0 50V Threshold voltage setting finished refer to Fig 90 Fig 90 Threshold custom setting 202...

Страница 87: ...ig 91 Fig 91 Display menu Display function menu as below Function Setting Instruction Source BUS Channel Choose resource as BUS Choose resource as channel BUS SEL CH SEL BUS0 BUS3 CH00 CH0F Among BUS0 BUS3 Among CH00 CH0F display ON OFF BUS or Channel on Bus or Channel off Contrast Increase Contrast Decrease Increases display contrast Decreases display contrast 203 ...

Страница 88: ...al display as OFF Repeat the operation of steps 5 6 and set BUS2 BUS3 as OFF 7 Press F1 till signal source display as Channel 8 Press F2 or turn CH1 Volts div knob till channel display as CH00 9 Press F3 to choose signal source as ON 10 Repeat operation of steps 8 9 and set CH01 CH02 CH03 as ON 11 Press F2 or turn CH1 Volts Div knob till channel display as CH04 12 Press F3 to choose signal display...

Страница 89: ...ting Instruction BUS BUS0 BUS3 Choose BUS for operating Channel CH0F CH00 1X111111 11111111 Choose any channel among CH00 CH0F BUS channel complex indication 1 for include X for exclude CH0F CH00 Include Exclude The bus selected includes this channel The bus selected excludes this channel Code Type HEX DEC All of the code type and measured value are HEX All of the code type and measured value are ...

Страница 90: ... or turn CH1 Volts div knob till channel display as CH00 4 Press F3 and set CH00 as Include Then Channel CH00 refer to display of 1 5 Repeat the operation of steps 2 3 and set CH01 CH02 CH03 as Include and other channel as exclude Then CH SEL display as XXXXXXXXXXXX1111 BUS setting finished 6 Press F4 and set code type as HEX BUS setting is finished refer to Fig 94 Fig 94 Bus setting 206 ...

Страница 91: ... synchronously Press measure and BUS value for current cursor position will display directly in measurement window BUS0 include CH00 CH03 BUS1 include CH00 CH07 BUS2 include CH00 CH0B BUS3 include CH00 CH0F 4 BUS auto measurement display as Fig 95 Fig 95 Bus measurement 207 ...

Страница 92: ... and trigger setting And it is possible to save 10 groups of settings Waveform storage and setting storage menu display as Fig 96 Fig 96 Storage menu Storage menu instruction as below Function Setting Instruction Memory SEL Waveform Setups Waveform for storage or recall Setups for storage or recall Memory ID Wavefor Waveform3 Setups 0 Setups 9 Storage 4 groups of waveform Storage 10 groups of setu...

Страница 93: ... F2 till memory ID Display as Waveform 0 4 Press F3 to save current display waveform Info window will show Waveform saving then show as Waveform saved successfully when storage finished 5 Press F1 till memory SEL as Setups 6 Press F2 till memory ID display as Setups 0 7 Press F3 to save current various settings Info window show Setting saved successfully 8 Press F4 to recall the memory waveform or...

Страница 94: ...mputer by connecting USB disk to computer Note During the U disk saving procedure some notes such as Waveform saving Waveform saved USB already connected USB connection interrupt etc will be prompted 43 9 How to search Searches have different operation according to different targets Search target including trigger position BUS value and pattern 1 Search triggers position as following steps Press 2...

Страница 95: ...1 till target display as BUS 3 Press F2 till BUS SEL as BUS0 4 Press F3 and choose Code Type value under displayed with red background and green digital indicator in the panel is on Then insert the value of 18 by digital key in the panel to get start 5 Press F3 again and red background for value under code is disappeared and value setting finished Repeat operation of steps D E if need to modify th...

Страница 96: ...sor Next Search the matched value after the current cursor For example follow up below steps to search signal complex of 00000000000010X1 1 Press 2 SEARCH and menu appears 2 Press F1 till target display as Pattern 3 Press F2 or turn CH1 Volts div knob to choose channel as CH00 4 Press F3 and set CH00 as high Then CH00 in CH Sel refer to 1 5 Repeat the operation of steps C D and set other channels ...

Страница 97: ...ow to review setting info You can choose system information display to be On or OFF by press INFO key System information includes all settings for acquired waveform and next acquisition Fig 101 System info 213 ...

Страница 98: ...of cursor 2 corresponds to trigger position Follow up below steps to measure data pulse frequency in CH00 with cursor measurement 1 Press 9 CURSOR and cursor menu appears 2 Press F1 till cursor display as Time Two purples vertical lines display in panel and refer to Cursor 1 and Cursor 2 separately 3 Turn CH1 POSITION knob and set Cursor 1 position in falling edge of CH00 4 Turn CH2 POSITION knob ...

Страница 99: ...appears 2 Press F1 till cursor display as Position Two purples vertical lines display in panel and refer to Cursor 1 and Cursor 2 separately 3 Turn CH1 POSITION knob and set Cursor 1 position in falling edge of CH00 4 Turn CH2 POSITION knob and set Cursor 2 position in next falling edge of CH00 5 Now the position difference between two cursors display in F2 is 10 which means there is 10 acquired d...

Страница 100: ...ity menu as below Function Setting Instruction Recall factory Default setting for LA Language Chinese English Default to be Chinese Default to be English Carry Vector BMP Set data format to be vector in Bin format for PC software Set data format to be BMP and loading data as picture 216 ...

Страница 101: ...m Automatic Measurement The oscilloscope can measure most displayed signals automatically Complete the following operations for the measurement of frequency cycle mean and peak to peak value Press the MEASURE button to show the automatic measurement function menu Press the F1 menu selection button and choose Source with the Source menu displayed Press the F2 F3 F4 and F5 menu selection buttons and...

Страница 102: ...s the F3 menu selection button and choose Pk Pk 9 Read the peak to peak values of Channel 1 and Channel 2 from the displayed menu see Fig 106 10 Calculate the amplifier gain with the following formulas Gain Output Signal Input signal Gain db 20 log gain Fig 106 Wave Form of Gain Measurement Example 3 Capture the Single Signal The digital storage oscilloscope takes the lead in providing the conveni...

Страница 103: ...e of the signal to be measured 12 If the Trigger State Indicator at the top of the screen does not indicate Ready push down the RUN STOP button and start Acquire waiting the emergence of the signal in conformity with the trigger conditions If a signal reaches to the set trigger level one sampling will be made and then displayed in the screen With this function any random occurrence can be captured...

Страница 104: ...ment according to the following steps 1 Press the ACQUIRE button to display the ACQU MODE menu 2 Press the F2 menu selection button and choose Peak Detect In this case the screen display contains the wave form of a random noise Especially when the time base is set as Low Speed then noise peak and burr contained in the signal can be observed with the peak detection See Fig 108 Fig 108 Wave Form of ...

Страница 105: ... to show the ACQU MODE menu 2 Press the F3 menu selection button and choose Average 3 Press the F4 menu selection button and observe the wave form obtained from averaging the wave forms of different average number After the averaging the random noise is reduced and the detail of the signal is easier to be observed Shown as follows after the noise is removed the burrs on the rising and falling edge...

Страница 106: ...button and recall the DISP SET menu 6 Press the F3 menu selection button and choose XY for Format The oscilloscope will display the input and terminal characteristics of the network in the Lissajous graph form 7 Adjust the VOLTS DIV and VERTICAL POSITION knobs optimizing the wave form 8 With the elliptical oscillogram method adopted observe and calculate the phase difference see Fig 110 Fig 110 Li...

Страница 107: ...the TRIG MENU button to display the trigger menu 2 Press the F1 menu selection button and choose Single for Type 3 Press the F2 menu selection button and choose CH1 for Source 4 Press the F3 menu selection button and choose Video for type 5 Press the F4 menu selection button and choose Field for Sync 6 Adjust the VOLTS DIV VERTICAL POSITION and SEC DIV knobs to obtain a proper wave form display se...

Страница 108: ...n button and choose Single for Type 3 Press the F2 menu selection button and choose CH1 for Source 4 Press the F3 menu selection button and choose Video for mode 5 Press the F4 menu selection button and choose Line for Sync 6 Adjust the VOLTS DIV VERTICAL POSITION and SEC DIV knobs to obtain the proper wave form display see Fig 112 Fig 112 Wave Form Obtained from the Video Line Trigger 224 ...

Страница 109: ...The measured voltage amplitude value is 10 times greater or smaller than the actual value Check whether the channel attenuation coefficient and the attenuation ration of the probe used in practical application is match 4 There is wave form displayed but it is not stable Check whether the Source item in the TRIG MODE menu is in conformity with the signal channel used in the practical application Ch...

Страница 110: ...function menu and execute the Auto calibration procedure All specification standards can be fulfilled except one s marked with the word Typical Digital Storage Oscilloscope Performance Characteristics Instruction Bandwidth 100 MHz P 1190 200 MHz P 1230 Channel 2 1 External Acquisition Mode Normal Peak detect Averaging Sample rate real time P 1190 Dual CH 500MSa s Single CH 1 GSa s P 1230 Dual CH 1...

Страница 111: ...nterval T Accuracy DC 100 MHz Single 1 interval time 100 ppm reading 0 6 ns Average 16 1 interval time 100 ppm reading 0 4 ns Vertical system A D converter 8 bits resolution 2 Channels simultaneously Sensitivity 2 mV div 10 V div at BNC Displacement 1 V 2 mV 50 mV 10 V 100 mV 1 V 100 V 2 V 10 V Analog bandwidth 100 MHz P 1190 200 MHz P 1230 Single bandwidth Full bandwidth Low Frequency 5 Hz at inp...

Страница 112: ...n center EXT 600 mV EXT 5 3 V Trigger level Accuracy typical Internal 0 3 div EXT 40 mV 6 of Set Value EXT 5 200 mV 6 of Set Value Trigger displacement Pre trigger 655 div Post trigger 4 div Trigger Holdoff range 100 ns 10 s 50 level setting typical Input signal frequency 50 Hz Edge trigger slope Rising Falling Sensitivity 0 3 div Pulse trigger Trigger condition Positive pulse Negative pulse Pulse...

Страница 113: ...cimal system Hex Digital Filter 0 1 2 optional Display Display Type 20 cm 8 Colored TFT LCD Liquid Crystal Display Display Resolution 640 Horizontal 480 Vertical Pixels Display Colors 65536 colors Output of the Probe Compensator Output Voltage Typical About 5V with the Peak to Peak value equal to or greater than 1 MΩ of load Frequency Typical Square wave of 1 kHz Power Mains Voltage 100 240 VAC RM...

Страница 114: ...ing Check the probe and instrument regularly according to their operating state Clean the external surface of the instrument following the steps shown below 1 Please wipe the dust from the instrument and probe surface with a soft cloth Do not make any scuffing on the transparent LCD screen when clean the LCD screen 2 Clean the instrument with a wet soft cloth not dripping water during the period o...

Страница 115: ...according to the instructions on the screen to perform the installation until it is completed 4 Connect the PeakTech oscilloscope to a USB port on your PC 5 Windows will detect new hardware and reports that the USB drivers to be installed now 6 The USB drivers of the device can be found in the installation directory of the installed software see step 3 7 After the USB drivers are installed the sof...

Страница 116: ...ow on the top of panel when oscilloscope power supplied by the battery and imply for different power consumption and when shows it means the power can only supply for 5 minutes maximum Note To avoid superheat of battery during charging the environment temperature is not allowed to exceed the permissible value given in technical specification Replacing the Lithium Battery Unit It is usually not req...

Страница 117: ...armful substances are marked with the symbol of a crossed out waste bin similar to the illustration shown left Under the waste bin symbol is the chemical symbol for the harmful substance e g Cd for cadmium Pb stands for lead and Hg for mercury You can obtain further information about the Battery Regulations from the Bundesministerium für Umwelt Naturschutz und Reaktorsicherheit Federal Ministry of...

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