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Instruments

M A N U A L

Oscilloscopes

HM 1004-

3

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HM 1505-

3

.01/.02/.03

FRANKFURT

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PARIS

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LUTON

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BARCELONA

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NEW YORK

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OCEANSIDE

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HONG KONG

ENGLISH

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Содержание HM 1004-3.01

Страница 1: ... Instruments MANUAL Oscilloscopes HM 1004 3 01 02 03 HM 1505 3 01 02 03 FRANKFURT PARIS LUTON BARCELONA NEW YORK OCEANSIDE HONG KONG ENGLISH ...

Страница 2: ...ggering 25 Normal Triggering 25 Slope 25 Trigger coupling 26 Triggering of video signals 26 Line triggering 26 Alternate triggering 27 External triggering 27 Trigger indicator TR 27 HOLD OFF time adjustment 27 B Timebase 2nd Timebase Triggering after Delay 28 Auto Set 28 Save Recall 29 Component Tester 29 General 29 Using the Component Tester 29 Test Procedure 29 Test Pattern Displays 29 Testing R...

Страница 3: ...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 4: ...att at 50Hz Min Max ambient temperature 0 C 40 C Protective system Safety class I IEC1010 1 Weight approx 5 9kg Color techno brown Cabinet W 285 H 125 D 380 mm Subject to change without notice 08 00 These microprocessor controlled oscilloscopes have been designed for a wide multitude of applications in service and industry For ease of operation the Autoset function allows for signal related automa...

Страница 5: ...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 against insulation breakdown with 2200V DC Under certain conditions 50Hz or 60Hz hum voltages can occur in the measur...

Страница 6: ...arantee claims Maintenance Various important properties of the oscilloscope should be carefully checked at certain intervals Only in this way is it largely certain that all signals are displayed with the accuracy on which the technical data are based The test methods described in the test plan of this manual can be performed without great expenditure on measuring instruments How ever purchase of t...

Страница 7: ...mit a true signal display The display of sinusoidal signals within the bandwidth limits causes no prob lems but an increasing error in measurement due to gain reduction must be taken into account when measuring high frequency signals These errors become noticeable at approx 40MHz HM1004 3 or 70MHz HM1505 3 At approx 80 MHz HM1505 3 110 MHz the reduction is approx 10 and the real voltage value is 1...

Страница 8: ...caus ing damage to the input of the oscilloscope However if for example only the residual ripple of a high voltage is to be displayed on the oscilloscope a normal x10 probe is sufficient 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 li...

Страница 9: ... 9ns The measurement of the rise or fall time is not limited to the trace dimensions shown in the above diagram It is only particularly simple in this way In principle it is possible to measure in any display position and at any signal amplitude It is only important that the full height of the signal edge of interest is visible in its full length at not too great steepness and that the horizontal ...

Страница 10: ...0kHz There fore the derating curve of the attenuator probe type con cerned must be taken into account The selection of the ground point on the test object is important when displaying small signal voltages It should always be as close as possible to the measuring point If this is not done serious signal distortion may result from spurious currents through the ground leads or chassis parts The grou...

Страница 11: ...justed with a small screwdriver please note trace rotation TR 6 FOCUS This control knob effects both the trace and the readout sharpness 7 SAVE RECALL The instrument contains 9 non volatile memories These can be used by the operator to save instrument settings and to recall them This relates to all controls which are electronically selected Press the SAVE pushbutton briefly to start the save proce...

Страница 12: ... with this control knob In ADD addition mode both Y POS I and Y POS II control knobs are active If the instrument is set to XY mode this control knob is inactive and the X POS knob must be used for a horizontal position shift DC voltage measurement If no signal is applied at the INPUT CHII 31 the vertical trace position represents 0 Volt This is the case if INPUT CHII 31 or in addition ADD mode bo...

Страница 13: ... aid of the X POS control As the X expansion results in a higher timebase speed lower time deflection coefficient all time and frequency relevant information in the readout is switched over Please note that in alternate timebase mode the inten sified sector may become invisible due to the X posi tion setting This pushbutton is not operative in XY mode 16 VOLTS DIV This control knob for channel I h...

Страница 14: ...channel II followed by XY Except the cursor lines which may be active all other readout information including the trigger point symbol are switched off In addition to all trigger and timebase related controls the Y POS II 10 knob and INV 33 button are deactivated For X position alteration the X POS 14 knob can be used 19 TRIG Pushbutton with double function for trigger source selec tion and associ...

Страница 15: ...ol switched off NR high frequency noise rejected LF low pass filter cuts off frequencies above approx 1 5kHz TVL TV signal line pulse triggering trigger point symbol switched off TVF TV signal frame pulse triggering trigger point symbol switched off line mains triggering trigger point symbol and TRIG LED 19 are switched off Please note In delay trigger mode B timebase the instrument is automatical...

Страница 16: ...TIME DIV 24 control knob is operative only for this timebase The readout then only displays the A time coefficient The timebase settings for this condition are stored if the timebase mode is changed ALT If alternate A and B ALT timebase mode is selected the TIME DIV 24 knob only controls the B timebase switch or vernier function The alternate timebase mode is a subfunction of the B timebase mode w...

Страница 17: ... switch and B vernier VAR LED on In the latter case the TIME DIV knob can be used in the same way as de scribed before under A timebase condition Underneath the front panel sector described above the BNC sockets and four pushbuttons are located 27 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 ...

Страница 18: ...n trols assumes that the readout is visible and the component tester is switched off 35 MENU Pushbutton Pressing and holding the pushbutton activates the display of the MAIN MENU It contains the submenus SETUP and CALIBRATE Once a menu is displayed the following pushbuttons are of importance 1 SAVE and RECALL 7 pushbutton Briefly pressing selects the submenu or an item within the submenu 2 SAVE 7 ...

Страница 19: ...coefficients of channel I and II Please note item 36 CHI II Addition ADD mode In ADD addition mode normally two input signals are displayed as one signal sum or difference As the result can only be determined if both calibrated deflection coefficients are equal the CHI II 36 selection function is deactivated In that case the readout indicates V without any additional channel information Different ...

Страница 20: ...erstood Each time before the instrument is put into operation check that the oscilloscope is connected to protective earth For that reason the power cable must be connected to the oscillo scope and the power outlet Then the test lead s must be connected to the oscilloscope input s Check that the device under test is switched off and connect the test lead s to the test point s Then switch on the in...

Страница 21: ...nt 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 compensation is a square wave generator with fast risetime typically 4ns and low output impedance approx 50Ω providing 0 2V at a frequenc...

Страница 22: ...cal probes should be used for both vertical inputs In order to avoid ground loops use a separate ground connection 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 18 pushbutton please note section Con trols and Readout In XY mode the timebase is deactivated The signal applied to the input of channel II fro...

Страница 23: ...eep edges It must be noted that the phase difference cannot be deter mined if alternate triggering is selected Phase difference measurement in DUAL mode t horizontal spacing of the zero transitions in div T horizontal spacing for one period in div In the example illustrated t 3div and T 10div The phase difference in degrees is calculated from Relatively small phase angles at lower frequencies can ...

Страница 24: ... the scope needs only correct amplitude and timebase settings for a constantly visible trace Automatic mode is recommended for all uncomplicated meas uring tasks However automatic triggering is also the appropri ate operation mode for the entry into difficult measuring problems e g when the test signal is unknown relating to amplitude frequency or shape Presetting of all parameters is now possible...

Страница 25: ...layed signal and the trigger signal is lost In TV F mode interference may occur if chopped DUAL mode is chosen or the readout is active Video signals are triggered in the automatic mode The internal triggering is virtually independ ent of the display height but the sync pulse must exceed 0 5div height The polarity of the synchronization pulse is critical for the slope selection If the displayed sy...

Страница 26: ...activated External triggering The external trigger input is activated with the aid of the TRIG 19 pushbutton see Controls and Readout if the trigger coupling is not set to line mains trigger coupling Then the internal trigger source is deactivated As the external trigger signal applied at the TRIG EXT socket normally has no relation to the signal height of the displayed signal the trigger point sy...

Страница 27: ...intensified sector on the A trace can be stated as the delay time It is related to the A trace start and the A time coefficient The delay function delays the B trace start by a variable time from the A trigger point This allows the sweep to begin on any portion of a signal except the first millimeters If the display shows jitter it is possible to select triggering of the B timebase after the elaps...

Страница 28: ...mponent under test is limited to a range from approx 20Ω to 4 7kΩ Below and above these values the test pattern shows only short circuit or open circuit For the interpretation of the displayed test pattern these limits should always be born in mind However most electronic components can normally be tested without any restriction Using the Component Tester After the component tester is switched on ...

Страница 29: ...resulting test patterns are shown below The basic equivalent circuit of a transistor is a Z diode be tween base and emitter and a normal diode with reverse polarity between base and collector in series connection There are three different test patterns For a transistor the figures b e and b c are important The figure e c can vary but a vertical line only shows short circuit condition These transis...

Страница 30: ...e sharpness of the vertical edges A certain loss of marginal sharpness of the CRT is unavoidable this is due to the manufacturing process of the CRT Symmetry and Drift of the Vertical Amplifier Both of these characteristics are substantially determined by the input stages of the amplifiers The symmetry of both channels and the vertical final amplifier can be checked by inverting Channel I and II d...

Страница 31: ...ry to synchronize with the time variable control the chop frequency 0 5MHz Check for negligible trace widen ing and periodic shadowing when switching between 0 5ms div and 0 2ms div It is important to note that in the I II add mode or the I II difference mode the vertical position of the trace can be adjusted by using both the Channel I and Channel II Y POS controls In X Y Operation the sensitivit...

Страница 32: ... not connected open circuit The length of this trace should be approx 8div With the test leads shorted together a vertical straight line with approx 6div height should be displayed The above stated measurements have some tolerances Trace Alignment The CRT has an admissible angular deviation 5 between the X deflection plane D1 D2 and the horizontal center line of the internal graticule This deviati...

Страница 33: ...terface 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 After the remote state has been switched off the RM LED 3 is dark Please note A minimum time must elapse between the commands RM 1...

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