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Instruments

Oscilloscope

HM1507-

ENGLISH

M A N U A L • H A N D B U C H • M A N U E L

Содержание HM1507-3.02

Страница 1: ... Instruments Oscilloscope HM1507 3 02 ENGLISH MANUAL HANDBUCH MANUEL ...

Страница 2: ...MANUAL HANDBUCH MANUEL ...

Страница 3: ... DUAL mode 30 Measurement of an amplitude modulation 30 Triggering and time base 30 Automatic Peak value Triggering 31 Normal Triggering 31 Slope 31 Trigger coupling 31 Triggering of video signals 32 Line Mains triggering 32 Alternate triggering 32 External triggering 33 Trigger indicator 33 HOLD OFF time adjustment 33 B time base 2nd time base 34 Triggering after Delay 34 AUTO SET 34 Component Te...

Страница 4: ...on the following hints and conditions regarding emission and immunity should be observed 1 Data cables For the connection between instruments resp their interfaces and external devices computer printer etc sufficiently screened cables must be used Without a special instruction in the manual for a reduced cable length the maximum cable length of a dataline must be less than 3 meters and not be used...

Страница 5: ...Variable 2 5 1 up to 1 25s div X MAG x10 5 max 5ns div Holdoff time variable to approx 10 1 Bandwidth X amplifier 0 3MHz 3dB X Y phase shift 3 below 220kHz Digital Time Base Accuracy 3 1 2 5 sequence A 100s 0 1µs div Peak detect 100s 5µs div B 20ms 0 1µs div Peak detect 20ms 5µs div Operating modes A or B alternate A B X MAG x10 5 10ns div Bandwidth X Amplifier 0 20MHz 3dB X Y phase shift 3 below ...

Страница 6: ...d in a socket outlet provided with a protective earth contact The protective action must not be negated by the use of an extension cord without a protective conductor The mains line plug must be inserted before connec tions are made to measuring circuits The grounded accessible metal parts case sockets jacks and the mains line supply contacts line live neutral of the instrument have been tested ag...

Страница 7: ...osition but the convection cooling must not be impaired The ventilation holes may not be covered For continuous operation the instrument should be used in the horizontal position preferably tilted upwards resting on the tilt handle The specifications stating tolerances are only valid if the instrument has warmed up for 30minutes at an ambient temperature between 15 C 59 F and 30 C 86 F Values with...

Страница 8: ...ownwards at each change Pure direct voltages can only be measured with DC coupling The input coupling is selectable by the AC DC pushbutton The actual setting is displayed in the readout with the symbol for DC and the symbol for AC coupling Amplitude Measurements In general electrical engineering alternating voltage data normally refers to effective values rms root mean square value However for si...

Страница 9: ...In this case an appropriate high voltage capacitor approx 22 68nF must be connected in series with the input tip of the probe With Y POS control input coupling to GD it is possible to use a horizontal graticule line as reference line for ground potential before the measurement It can lie below or above the horizontal central line according to whether positive and or negative deviations from the gr...

Страница 10: ...ts full length at not too great steepness and that the horizontal distance at 10 and 90 of the amplitude is measured If the edge shows rounding or over shooting the 100 should not be related to the peak values but to the mean pulse heights Breaks or peaks glitches next to the edge are also not taken into account With very severe transient distortions the rise and fall time measure ment has little ...

Страница 11: ...e as short and thick as possible When the attenuator probe is connected to a BNC socket a BNC adapter should be used In this way ground and matching problems are eliminated Hum or interference appearing in the measuring circuit especially when a small deflection coefficient is used is possibly caused by multiple grounding because equalizing currents can flow in the shielding of the test cables vol...

Страница 12: ... and no other LED on the front panel is lit except A All INTENS settings are stored after the instrument is switched off The AUTO SET function switches the readout on and selects A time base mode A LED lit The INTENS setting for each function is automatically set to the mean value if less intensity was previously selected 5 TR The trace rotation control can be adjusted with a small screwdriver ple...

Страница 13: ...i cally again it will be required to stop rotating the knob for at least about 2 seconds Attention The dynamic range limits of the A D converter may become visible if a Y position shift is performed after storage This can affect those signal parts which were originally above or below the screen 8 PTR PK Det Pushbutton with two functions Neither function is available in analog mode PTR Briefly pres...

Страница 14: ... STOR MODE Pushbuttons with associated LEDs These functions are not available in analog mode If digital SINGLE SGL mode has not been chosen one of the associated LEDs is lit The signal capture and display mode can be selected by pressing one of the pushbuttons The mode setting is indicated by one of the LEDs RFR ENV AVM and ROL and also displayed by the readout The only exception is in XY storage ...

Страница 15: ...g mode on or off SINGLE mode is indicated by the associated SGL LED SINGLE mode is available in digital as well as in analog mode and remains unchanged when switching over from analog to digital mode or vice versa The main purpose of SINGLE is the capture of one time events but it can also be used in combination with repetitive signals SINGLE mode automatically selects A time base mode and normal ...

Страница 16: ...s reference memory acquisition Before starting the procedure the current signal can but must not be protected by the HOLD function As the reference signal is then equal to the current signal it is usually not visible at once If neither HOLD nor SINGLE is active the current signal can be shifted by the Y POS control s to make the reference signal visible If both REFERENCE I and II LEDs lit and DUAL...

Страница 17: ...e the DC content of a signal by comparing the actual Y position with the previously determined 0 Volt Y position Y POS I Symbol Provided that the readout is displayed and DC REFE RENCE ON is selected in the SETUP submenu MISCELLANEOUS the 0 Volt reference position is indicated by a ground symbol For channel I this symbol is displayed on the left of the vertical graticule center line if the Y POS I...

Страница 18: ...e control knob causes a different trigger point setting voltage The trigger unit starts the time base when the edge of a trigger signal voltage crosses the trigger point In most Yt modes the trigger point is displayed in the readout by the symbol on the left vertical graticule line If the trigger point symbol would overwrite other readout information or would be invisible when being set above or b...

Страница 19: ...to GD 34 38 Whether alternated or chopped channel switching is present in analog mode depends on the actual time base setting and is displayed in the readout ALT analog mode only displayed in the readout indicates alternate channel switching After each time base sweep the instrument internally switches over from channel I to channel II and vice versa This channel switching mode is automatically se...

Страница 20: ...te A B time base mode B time base mode and line mains trigger coupling STORAGE MODE ONLY In ROLL mode the signal capture is untriggered Con sequently alternate triggering is not available 25 VOLTS DIV Control knob This control knob for channel II has a double function The following description relates to the input attenuator function VAR LED dark Turning the control knob clockwise increases the se...

Страница 21: ... start of the intensified sector In the free run condition delay trigger not active of the B time base an approximate value is displayed in the readout Dt This is an aid to find the position of the intensified sector which may be very small If only the B time base is being operated the delay time can be varied but there is no intensified sector as the A trace is not visible STORAGE MODE ONLY The H...

Страница 22: ... information is also displayed in the readout as an approximate value e g Dt 2 5ms related to the calibrated A time coefficient uncalibrated e g Dt 2 5ms The width of the segment decreases when the B time coefficient is set to a lower value higher time deflection speed Alternate time base mode causes the display to alter between A and B time base after each sweep analog mode In alternate DUAL mode...

Страница 23: ...ion coefficient setting is not possible in storage mode Underneath the front panel sector described before the BNC sockets and four pushbuttons are located 32 INPUT CH I BNC socket This BNC socket is the signal input for channel I In XY mode signals at this input are used for the Y deflection The outer ground connection is galvanically connected to the instrument ground and consequently to the saf...

Страница 24: ...e The trigger coupling depends on the TRIG MODE 27 setting ANALOG MODE ONLY Z Input If neither COMPONENT TEST nor external trigger coupling TRIG EXT is chosen the socket is operative as a Z trace intensity modulation input High TTL level positive logic effects blanking low level gives unblanking No higher voltages than 5 Volt are permitted Below the CRT there are the controls for the readout the c...

Страница 25: ...t frequency f is displayed If the time base is uncalibrated the readout displays t or f STORAGE MODE ONLY Extended CURSOR measurement The extended CURSOR measurement functions are available under the following conditions 1 EXTENDED CURSOR in the menu Setup Miscel laneous must be in ON condition 2 Time base mode must be present 3 t or 1 t f cursor measurement must be activated Briefly pressing the ...

Страница 26: ...nes and the readout displays VY Briefly pressing the CHI II 41 pushbutton selects channel II X signal measuring Then the cursor lines are displayed as vertical lines and the readout indicates VX Please note In all V voltage measurement conditions the division ratio of the probe s must be taken into account The voltage value displayed in the readout must be multiplied by 100 if e g a x100 100 1 pro...

Страница 27: ... will only be displayed if the interface HO79 6 is connected to the oscilloscope For further information please note the HO79 6 manual which is supplied with the interface First Time Operation The following text assumes that the SAFETY section of this manual has been read carefully and understood Each time before the instrument is put into operation check that the oscilloscope is connected to prot...

Страница 28: ...mum utilization of the full bandwidth together with constant group delay at the high frequency end thereby reducing characteristic transient distortion near the leading edge e g overshoot rounding ringing holes or bumps to an absolute minimum Using the probes HZ51 52 and 54 the full bandwidth of the oscilloscope can be utilized without risk of unwanted wave form distortion Prerequisite for this HF...

Страница 29: ...nnection and do not use the probe ground leads or cable shields X Y Operation The most important control regarding this operation mode is the DUAL XY 23 pushbutton please note section Con trols and Readout In XY mode the time base is deactivated The signal applied to the input of channel II front panel marking HOR INP X causes the X deflection The input related controls AC DC GD pushbutton and the...

Страница 30: ...ode with Lissajous figures Measurement of an amplitude modulation The momentary amplitude u at time t of a HF carrier voltage which is amplitude modulated without distortion by a sinusoidal AF voltage is in accordance with the equation where UT unmodulated carrier amplitude Ω Ω Ω Ω Ω 2πF angular carrier frequency ω ω ω ω ω 2πf modulation angular frequency m modulation factor The lower side frequen...

Страница 31: ...g Break down of triggering is best recognizable at the left screen edge the start of the trace in differing display height The automatic peak value triggering operates over all variations or fluctuations of the test signal above 20Hz However if the pulse duty factor of a square wave signal exceeds a ratio of 100 1 switching over to normal triggering will be necessary Automatic triggering is practi...

Страница 32: ...ger pulse from the vertical sync pulses may become visible under certain conditions Due to the integra ting network time constant not all vertical sync pulses starting the trace are visible On the 10µs div setting and line TV triggering selected approx 1 lines are visible Those lines originate from the odd and even fields at random The sync separator circuit also operates with external triggering ...

Страница 33: ...ger signal has a sufficient amplitude and the trigger level control setting is correct This is valid with automatic and with normal triggering By observing the trigger LED sensitive trigger level adjustment is possible when normal triggering is used particularly at very low signal frequencies The indication pulses are of only 100ms duration Thus for fast signals the LED appears to glow continuousl...

Страница 34: ...in Yt time base mode is possible In most cases no additional manual instrument setting is required Briefly pressing the AUTO SET pushbutton causes the instru ment to switch over to the last Yt mode settings regarding CH I CH II and DUAL If the instrument was operated in Yt mode the actual setting will not be affected with the exception of ADD mode which will be switched off At the same time the at...

Страница 35: ...st object has a linear ohmic resistance both deflecting voltages are in the same phase The test pattern expected from a resistor is therefore a sloping straight line The angle of slope is determined by the resistance of the resistor under test With high values of resistance the slope will tend towards the horizontal axis and with low values the slope will move towards the vertical axis Values of r...

Страница 36: ...uding Safety Earth pull out power plug from out let Remove all measuring cables including probes between oscilloscope and circuit under test Other wise both COMPONENT TESTER leads are not isola ted against the circuit under test In circuit tests are possible in many cases However they are not well defined This is caused by a shunt connection of real or complex impedances especially if they are of ...

Страница 37: ...voltage drop on a 5 Volt line is expected the 0 Volt line may be set to the horizontal center graticule line by using the Y POS control Then the trigger point symbol may be set 2 division above the 0 Volt position using the LEVEL control If the deflection coefficient is set to 200mV and DC input coupling selected using a x10 probe the trigger point is at 4 Volts A voltage drop from 5 Volts below 4...

Страница 38: ...s are described under item MENU 34 in section Controls and Readout After a warm up time of 20 minutes the following items can be used by operators not equipped with precision instruments Both items are regarding the instrument s temperature response under extreme environmental conditions Similar effects can be caused by component failures as a result of the application of too high voltage at an in...

Страница 39: ...ut can be controlled via the interface only The only ways to quit this status are Switching the oscilloscope off transmitting the command RM 0 from the PC to the oscilloscope or depressing the AUTO SET LOCAL pushbutton if in unlocked condition command LK 1 was not sent RS232 Interface Remote Control Front control HM1507 3 After the remote state has been switched off the RM LED 3 is dark Please not...

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