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Digital Phosphor Storage Oscilloscope

Model No. 72-14520, 72-14525,

72-14530 & 72-14535

Содержание 72-14520

Страница 1: ...1 Digital Phosphor Storage Oscilloscope Model No 72 14520 72 14525 72 14530 72 14535 ...

Страница 2: ...onnect to ground never connect to a voltage source This product must be earthed using the mains power cord ground connection Do not disconnect from the mains supply and it s ground connection when any item is connected to this product for measurement Children should be supervised to ensure that they do not play with the product Always disconnect from the mains when the product is not in use or bef...

Страница 3: ...bserve and analyse signal problems in a faster and clearer way 1 Screen display area 2 Copy print screen 3 Multifunctional control 4 Function menu 5 Automatic setting 6 Run stop 7 Single trigger control 8 All clear 9 Calibration and ground terminal 10 Trigger control area 11 Horizontal control area 12 Analogue channel inputs 13 Vertical control area 14 Control menu 15 USB HOST Interface 16 Power o...

Страница 4: ...Set the attenuation coefficient in the probe menu and the switch on the probe to 10x Enable CH1 and press AUTO Observe the shape of the displayed waveform Adjust the variable capacitor on the probe with an insulated screwdriver until a correct waveform is achieved The oscilloscope features an AUTO SET function which automatically adjusts the vertical deflection factor scanning time base and trigge...

Страница 5: ...midpoint position HORIZONTAL SCALE CONTROL Used to adjust the vertical scale of the current waveform The vertical scale has 1 2 and 5 steps Pressing the SCALE button allows the vertical adjustment to switch between main and extensible window mode Trigger system TRIGGER LEVEL CONTROL Adjusts the currently selected trigger level Press the control to return the trigger level back to the midpoint posi...

Страница 6: ...rage STORAGE Storage interface can select different types of storage and waveform settings which can be stored internally or through USB device CURSOR Cursor measurement menu can measure waveform s time and voltage manually with cursor Press F1 to turn on or off DISPLAY Select display settings such as display type format duration grid brightness and waveform brightness UTILITY The utility menu can...

Страница 7: ...igh frequency low frequency and noise TRIGGER LEVEL Indicates the current trigger level value can be adjusted with the trigger level control 7 CH1 Vertical Identification Displays CH1 activation state channel coupling bandwidth limit vertical profile and probe attenuation coefficient CHANNEL ACTIVATION STATE When the background colour is consistent with the channel colour the channel is activated ...

Страница 8: ...C Both AC and DC quantities of the signal being measured can now pass through The waveform displays both AC and DC quantities of the signal Functions Menu Setup Notes Coupling AC Intercepts the DC quantities of the input signal DC Pass AC and DC quantities of input signal GROUND Disconnect input signal Bandwidth Limit On Limit bandwidth to 20MHz to reduce noise display Off Full bandwidth Vertical ...

Страница 9: ...X in the menu This principle applies to other values to ensure the voltage reading is correct The coefficients can be set to 0 001X 0 01X 0 1X 1X 10X 100X and 1000X Waveform inversion Reverse Phase The displayed signal is inverted 180 degrees with respect to the ground level The vertical identification will display a reverse phase logo Vertical Volts Div adjustment setup The VOLTS DIV range of the...

Страница 10: ...channel The selected trigger source can operate normally whether the input is displayed or not Select any one of the analogue signal input terminal CH1 CH4 on the front panel of the oscilloscope as a trigger signal 2 External trigger Select the input Trig EXT from the back of the oscilloscope For example the external clock input can be used on the Trig EXT terminal as a trigger source EXT signal t...

Страница 11: ...FORCE key to generate a forced trigger signal If the waveform is not displayed in normal or single shot mode press the FORCE button to collect the signal baseline to ensure acquisition is normal Edge Trigger When selecting edge trigger you are triggering at the rising and falling edges of the input signal Press TRIG MENU and press F1 to select the trigger type and use the multifunction control to ...

Страница 12: ...t negative pulse width as the trigger signal Trigger mode Auto Normal Single The system automatically samples waveform data when there is no trigger signal input The scan baseline is shown on the display When the trigger signal is generates it automatically turns to trigger scan The system stops acquiring data when there is no trigger signal When the trigger signal is generated trigger scan occurs...

Страница 13: ...to synchronise with trigger Set synchronised trigger on the specified line and adjust by turning the multifunction control on the front panel Set video odd field to synchronised trigger Set video even field to synchronised trigger Functions Menu Setup Notes Type Slope Trigger source CH1 to CH4 Set Ch1 to CH4 as the signal source trigger signal Trigger Setting Enters trigger setting menu Slope Sett...

Страница 14: ...ogic level can be adjusted when the corresponding signal source is selected The way to adjust the signal level is the same with adjusting the trigger level To avoid the effect of noise it is suggested to set the level compare at the waveform centre area to obtain accurate results TRIGGER SETTING Set the Trigger Selection Select this option to enter the trigger setting menu The Trigger Mode can be ...

Страница 15: ...n also set the trigger condition START OF FRAME The waveform trigger is at the start bit of the RS232 protocol referred to the drawing Stable waveforms can be observed by choosing the start of frame when single string signals or multiple same string signals are sent If the data being sent is changing the waveform will also change correspondingly PARITY ERROR Set the RS232 parity bit to 0 or 1 acco...

Страница 16: ...200bps and customized The customized baud rate can be set from 1 to 5000000 5 million After selecting the customized baud rate the customized value can be adjusted using the Multi purpose control Press the corresponding baud rate display button to increase the baud rate digit being controlled in order to quickly set to the desired baud rate It is recommended that the interface length should be les...

Страница 17: ...is LSB the baud rate is 115200bps The bus settings are Bus is open the display format is ASCII event list open I2C Protocol Trigger and Decode Optional I2C protocol is usually used to connect micro controller and its peripheral equipment a widely used protocol in the field of microelectronics communication control The bus protocol uses two wires to transmit One is serial data cable SDA the other i...

Страница 18: ...mation trigger occurs on the receiving bit when SCL and SDA and both high 5 ADDR It is address trigger The address trigger will occur if the communication address is the same with the user setting address It can help to quickly locate using address 6 DATA It is data trigger The data trigger can occur with the following conditions equal greater less unequal It is convenient to analyse data and capt...

Страница 19: ...e oscilloscope will capture the continuous communication data which can be displayed directly by the screen or in the event list to make communication analysis quicker more accurate and more convenient BUS SETTING Use this option to enter decode bus settings BUS STATUS Use this function to enable bus control selection list to open or close the decoding function You can also operate using the multi...

Страница 20: ...Protocol Trigger and Decode Optional SPI interface is a kind of synchronized serial peripheral interface which can make the host and all kinds of peripheral equipment undertake communication through the serial methods It is a kind of synchronous communication bus of full duplex It usually uses four signal lines MOSI the host data output the slave data input MISO the host data input the slave outpu...

Страница 21: ...on to set the positive or negative polarity of the chip selection signal The normal SPI communication uses the transmission signal with negative polarity SCLK SETTING Set the Clock Signal Use this function to enter the clock signal setting interface Press the SCLK button to switch any channel among H1 CH4 as clock source The corresponding logic level can be adjusted when the corresponding signal s...

Страница 22: ... display options hexadecimal decimal and binary and ASCII The multi purpose control can also set it after the list displays EVENT LIST Press the button EVENT LIST and the decoding events can be open or closed The multi purpose control can also set it after the list displays PSEUDO SQUARE WAVE Select this option and the pseudo square wave function can be open and closed The multi purpose control ca...

Страница 23: ...ill be in ROLL mode At this point the trigger system will not work the oscilloscope will be continuous on the screen to draw the waveform of the voltage time chart Extended Window Used to enlarge waveform the extended waveform setting cannot be slower than main waveform setting Press the HORI MENU button in the control panel Press F1 to select the window scale OPERATION ...

Страница 24: ...e shows Because the waveforms displayed by the whole lower part are corresponding to the areas selected by upper half part rotating the horizontal SCALE control to reduce the selected areas can improve the scale time base namely can improve the waveforms horizontal SCALE multiple Note The max scale time base is 200ns div Independent Time Base In independent time base CH1 CH4 can be arranged in tim...

Страница 25: ... Logical AND OR NOT and XOR Custom Advanced Operations Digital Filter Press MATH button to enter the mathematical operation menu is The POSITION and the SCALE controls can be used to change the vertical position and the vertical profile of the mathematical operations Under maths operation the horizontal position cannot be independently adjusted it will change automatically according to the analogu...

Страница 26: ... of a limited length When this cycle is a whole number the YT waveform will have the same amplitude at the start and finish There is no waveform interruption If the YT waveform cycle is not a whole number there will be different amplitudes at the start and finish resulting in transient interruption of high frequency at the connection point In frequency domain this is known as leakage To avoid leak...

Страница 27: ...resolution is better than the rectangle window but amplitude resolution is poorer Sine cyclical and narrow band random noise Hamming Frequency resolution is marginally better than Hanning window Temporary or fast pulse Signal level varies greatly before and after Blackman The best amplitude resolution and the poorest frequency resolution Mainly for single frequency signals to search for higher ord...

Страница 28: ...form is being recorded and the recorded data is then stored in the memory Functions Menu Setup Notes Type Digital Filter Source CH1 to CH4 Set CH1 to CH4 for digital filter source Filter type Low pass High pass Band pass Set filter to low pass Set filter to high pass Set filter to band pass Frequency lower limit Only valid in high pass or band pass Use multi purpose control to modify lower limit v...

Страница 29: ... might be missing the sampling waveform might be different than the actual signal WAVE MIXING When the sampling rate is 2 times lower than the actual signal frequency Nyquist frequency the frequency of the reconstructed signal will be less than the actual signal frequency WAVEFORM LEAKAGE Due to low sampling rate the reconstructed waveform might not reflect the actual signal Acquisition Mode To ob...

Страница 30: ...htness and waveform brightness Press the DISPLAY key to enter the display menu Envelope The sampling points gathered at same time are calculated and the maximum and minimum values are displayed Peak detection mode is used for individual acquisitions using general envelope mode Storage Depth The storage depth is the number of waveforms that can be stored in the oscilloscope during a trigger acquisi...

Страница 31: ...litude level The horizontal SCALE control can be used to adjust the time position in order to obtain a well displayed Lissajous graph Functions Options Description Type Vector Point Using lines to display between samples Displays points directly Format YT XY 1 2 XY 3 4 Display level on time scale Display Lissajous graph of CH1 CH2 waveforms Display Lissajous graph of CH3 CH4 waveforms UPO2XX4CS on...

Страница 32: ...raw a difference angle θ arcsin A B or θ arcsin C D If the principal axis of an ellipse is in quadrants I and III then the phase angle should be in I IV quadrant in 0 to π 2 or 3 π 2 to 2 π If the principal axis of an ellipse in II IV quadrant then the phase angle should be π 2 to π or π to 3 π 2 In addition if the frequency or phase difference of the two detected signals is an integer the frequen...

Страница 33: ...al Analysis OFF Peak Difference Turn OFF feature Automatic calculation of user defined parameters of average max and min Only applicable when user defined parameters are present Automatic calculation of user defined parameters of average difference and number of measurements Only applicable when user defined parameters are present Next page Go onto the next page Signal source CH1 to CH4 Select the...

Страница 34: ...etitive waveform 2 Frequency The reciprocal of the period 3 Rise time The time it takes the waveform amplitude to increase from 10 to 90 4 Fall time The time it takes the waveform amplitude to decrease from 90 to 10 5 Width The width of a positive pulse at 50 amplitude 6 Width The width of a negative pulse at 50 amplitude 7 Duty The ratio of positive pulse width to period 8 Duty The ratio of negat...

Страница 35: ...ulti purpose control to confirm selection For every selected parameter a symbol will appear in front of the parameter F3 can be pressed to turn off user defined parameter selection menu and the parameters will be display at the bottom of the screen For convenience and immediate view of these parameters up to 5 parameters can be defined at the same time To open the measurement statistical function ...

Страница 36: ...r a periodic signal if AX and BX are set at the rising edge of adjacent cycles then BX AX is the signal s period and 1 BX AX is the frequency Parameters can also display the voltage value at cursor s current position That is AY BY and BY AY The multi purpose control can be used to adjust the BX and AX positions when setting is set to trace using the F3 key The method for voltage measurement is sim...

Страница 37: ...ti purpose control can adjust both AY and BY at the same time On the upper left corner of the display area BY and AY are represented by the current position of the cursor BY and AY respectively BY AY indicates the voltage difference between the two cursors Functions Options Description Type Storage Settings Disk DSO USB Data saved on the oscilloscope Data saved on USB drive File name File name can...

Страница 38: ...form to the chosen destination Functions Options Description Reference REF A to REF D Select from any of the four references to callback waveform Disk DS0 When REF is pressed the waveform will be recalled from the oscilloscope memory USB When REF is pressed the waveform will be recalled from the connected external USB device USB CSV When Save is pressed waveform will be saved to an external USB de...

Страница 39: ...illoscope model number software version firmware version etc Language Displays menu language of oscilloscope Menu Display 1s 2s 5s 10s 20s Manual Set the menu to auto hide after a specified time or manually using MENU key Press MENU key to recall hidden menu 1 3 Enters Auxiliary function setting menu 2 Functions Options Descriptions Waveform recording Enters Waveform Recording Menu Pass test Enter...

Страница 40: ... which can be recorded will change according to current storage depth Functions Options Description Allow test Close Open Close Pass Test Open Pass Test Output Fail Pass Set the Pass Fail interface on the rear panel to a failure pulse and sound a buzzer Set the Pass Fail interface on the rear panel to a pass pulse and sound a buzzer Source CH1 to CH4 Set the source channel for the Pass Test Displa...

Страница 41: ...e multi purpose control to select the stop condition threshold Return Return to previous menu Template settings menu Stop settings menu SYSTEM UPGRADE After opening the pass test you are required to set the stop settings and template settings before you can perform the test function Otherwise you ll be prompted Function is Disabled Press UTILITY to enter the auxiliary function menu press F1 to vie...

Страница 42: ...applies only to the following conditions 1 Automatic setting is suitable for setting up simple single frequency signals and not for complex combination waves 2 The signal frequency is not less than 50Hz the amplitude is not less than 30mVpp and the square wave duty cycle is more than 5 3 Only opened channel can be used for automatic setting Run Stop When the RUN STOP key is pressed a green light w...

Страница 43: ...tch at the back of the oscilloscope is open press the front panel power key and confirm green light is present If there is a sound it indicates that the oscilloscope is activated Try the following operation Press DEFAULT key then F1 and if the device returns to normal the back light brightness is set too low Restart the oscilloscope After signal acquisition waveform does not appear on display Chec...

Страница 44: ...h rate is too slow Check whether the acquisition is set average and the number of times it averages You can speed up by display by reducing the average times or select other methods such as normal sampling SPECIFICATION Input Input coupling DC AC GND Input impedance 1MΩ 2 20pF 3pF Probe attenuation 0 001 0 01 0 1 1 10 100 1000 Maximum input voltage CATI 300 Vrms CATII 100 Vrms Transient Overvoltag...

Страница 45: ...high resolution envelope and average Average Value After all channels reach N times sampling N times in 2 4 8 16 32 64 128 256 512 1024 2048 4096 and 8192 Waveform Interpolation sin x x Storage Depth Auto 28kpts 280kpts 2 8Mpts 28Mpts Trigger Trigger level range Internal Centre of the screen 8 grids External 0 8V Trigger mode Automatic normal single Trigger hold off range 100ns 10s High frequency ...

Страница 46: ...25 NTSC and 1 625 PAL SECAM Measure Cursor Manual Voltage between cursors V Time between cursors T Frequency Hz 1 T Trace Mode Voltage and time at waveform point Indicator Allows auto display of cursor Auto measurement Max Min Peak Peak Top Bottom Amplitude Mean Middle Period Mean RMS Period RMS Area Period Area Overshoot Preshoot Frequency Period Rise Time Fall Time Positive Pulse Negative Pulse ...

Страница 47: ... default 10kHz Power supply 100V 240V 45Hz 440Hz Fuse 3A T level 250V Humidity temperature range Operational below 35o C 90 relative humidity Storage 35o C 40o C 60 relative humidity Altitude Operational Below 3000m Storage Below 15 000m Size 336mm W 164mm H 108 D mm Weight 3 5kg Maintenance Recommend calibration check annually Interface Standard USB Host USB Device LAN EXT Trig AUX Out Display Di...

Страница 48: ...ed Contact your local authority for details of recycling schemes in your area Made in China PR2 9PP Man Rev 1 0 MAINTENANCE Cleaning Periodically wipe the case with damp cloth and mild detergent Do not use abrasives or solvents for cleaning Disconnect from the mains first Clean the measurement probe tips occasionally as dirt on the probes can affect reading accuracy Take care to avoid scratching t...

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