Hameg HM304 Скачать руководство пользователя страница 1

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Subject to change without notice

Oscilloscope

HM304

Test Instructions

General ................................................................... 23
Astigmatism Check ............................................... 23
Symmetry and Drift of the Vertical Amplifier ....... 23
Calibration of the Vertical Amplifier ....................... 23
Transmission Performance of the
Vertical Amplifier .................................................... 23
Triggering Checks .................................................. 24
Timebase ................................................................ 24
Holdoff time ........................................................... 25
Component Tester ................................................. 25
Trace Alignment ..................................................... 25

Service Instructions

General ................................................................... 25
Instrument Case Removal ..................................... 25
Operating Voltages ................................................ 26
Maximum and Minimum Brightness .................... 26
Astigmatism control .............................................. 26
Trigger Threshold ................................................... 26
Trouble-Shooting the Instrument .......................... 26
Adjustments ........................................................... 26
RS232 Interface - Remote Control ....................... 27
Baud-Rate Setting .................................................. 27
Data Communication ............................................. 27
Command definition .............................................. 27
Command Chart: ................................................... 27
Instrument Data Field with Single Commands .... 28
Short instruction for HM304 ................................. 29
Switching on and initial setting ............................. 29
Vertical amplifier mode .......................................... 29
Triggering mode ..................................................... 29
Measurements ...................................................... 29
Component tester mode ....................................... 29
Front Panel Elements HM304
(Brief Description - Front View) ............................. 30

Oscilloscope data sheet with technical details 

. .... 4

Operating Instructions

General Information ................................................. 5
Symbols ................................................................... 5
Use of tilt handle ..................................................... 5
Safety ....................................................................... 5
Operating conditions ............................................... 5
EMC ......................................................................... 6
Warranty .................................................................. 6
Maintenance ............................................................ 6
Protective Switch-Off .............................................. 6
Power supply ........................................................... 6
Type of signal voltage .............................................. 7
Amplitude Measurements ....................................... 7
Total value of input voltage ..................................... 8
Time Measurements ............................................... 8
Connection of Test Signal ........................................ 9
First Time Operation .............................................. 10
Trace Rotation TR .................................................. 10
Probe compensation and use ............................... 11
Adjustment at 1kHz ............................................... 11
Adjustment at 1MHz ............................................. 11
Operating modes of the vertical
amplifiers in Yt mode. ........................................... 12
X-Y Operation ......................................................... 12
Phase comparison with Lissajous figures ............ 13
Phase difference measurement
in DUAL mode ....................................................... 13
Measurement of an ............................................... 13
amplitude modulation ............................................ 13
Triggering and time base ....................................... 14
Automatic Peak-Triggering .................................... 14
Normal Triggering .................................................. 15
Slope ...................................................................... 15
Trigger coupling ...................................................... 15
Line triggering (~) .................................................. 16
Alternate triggering ................................................ 16
External triggering ................................................. 16
Trigger indicator ..................................................... 16
Holdoff-time adjustment ....................................... 16
Delay / After Delay Triggering ............................... 17
AUTO SET .............................................................. 18
SAVE/RECALL ........................................................ 19
Component Tester ................................................. 19
Using the Component Tester ................................ 19
Test Procedure ....................................................... 19
Test Pattern Displays ............................................. 19
Testing Resistors ................................................... 20
Testing Capacitors and Inductors .......................... 20
Testing Semiconductors ........................................ 20
Testing Diodes ....................................................... 20
Testing Transistors ................................................. 20
In-Circuit Tests ....................................................... 20

Table of contents

St.170698-Hüb/Ros/goRR

GB

Содержание HM304

Страница 1: ...tructions General Information 5 Symbols 5 Use of tilt handle 5 Safety 5 Operating conditions 5 EMC 6 Warranty 6 Maintenance 6 Protective Switch Off 6 Power supply 6 Type of signal voltage 7 Amplitude...

Страница 2: ...uction in the manual for a reduced cable length the maximum cable length of a dataline must be less than 3 meters long If an interface has several connectors only one connector must have a connection...

Страница 3: ...nzt durch 93 68 EWG Low Voltage Equipment Directive 73 23 EEC amended by 93 68 EEC Directive des equipements basse tension 73 23 CEE amend e par 93 68 CEE Angewendete harmonisierte Normen Harmonized...

Страница 4: ...35MHz 3dB Risetime 10ns Overshoot max 1 Deflection coefficients 14 calibrated steps from1mV div to20V div 1 2 5 sequence with variable 2 5 1 up to 50V div Accuracy in calibrated position 1mV div to 2m...

Страница 5: ...three conductor power cord with protective earthing conductor and a plug with earthing contact The mains line plug shall only be inserted in a socket outlet provided with a protective earth contact T...

Страница 6: ...aintenance 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...

Страница 7: ...ms Veff have 2 83 times the potential difference in Vpp The relationship between the different voltage magnitudes can be seen from the following figure Voltage values of a sine curve Vrms effective va...

Страница 8: ...e base setting indicated by one of the TIME DIV LED s one or several signal periods or only a part of a period can be displayed The time coefficients are stated in s div when the red sec LED and the 0...

Страница 9: ...hes next to the edge are also not taken into account With very severe transient distortions the rise and fall time measurement has little meaning For amplifiers with approximately constant group delay...

Страница 10: ...oscilloscope by depressing the red POWER pushbutton The instrument will revert to its last used operating mode Except in the case of COMP TESTER mode where a trace appears on the screen if the INTENS...

Страница 11: ...should be adjusted The location of the low frequency compensation trimmer can be found in the probe information sheet Adjust the trimmer with the insulated screw driver provided until the tops of the...

Страница 12: ...channell I to channel II and vice versa after each sweep period In DUAL mode the internal trigger source can be switched over from channel I to channel II and vice versa if the TRIG pushbutton is dep...

Страница 13: ...compared with C short circuited then the test voltage leads the reference voltage and vice versa This applies only in the region up to 90 phase shift Therefore C should be sufficiently large and produ...

Страница 14: ...t when external trigger is used the trigger threshold can be stated as vertical display height in div through which the time base generator starts the display is stable and the trigger LED located in...

Страница 15: ...gnals than the DC coupling because the white noise in the trigger voltage is strongly suppressed So jitter or double triggering of complex signals is avoidable or at least reduced in particular with v...

Страница 16: ...er voltage may have a completely different form from the test signal voltage Triggering is even possible in certain limits with whole number multiples or fractions of the test frequency but only with...

Страница 17: ...following explanation assumes that the trace starts on the left vertical graticule line Photo 1 composite video signal MODE undelayed TIME DIV 5ms div Trigger coupling TV F Trigger slope falling Depre...

Страница 18: ...ted in Dual mode under conditions where DUAL chopped mode is active this display mode is not switched off when time coefficients are being reduced 0 2ms div to 0 05 s div for signal expansion in DEL a...

Страница 19: ...also be made to integrated circuits All these components can be tested in and out of circuit The test principle is fascinatingly simple A built in generator delivers a sine voltage which is applied a...

Страница 20: ...ore testing of transistor amplification is not possible but testing of a single junction is easily and quickly possible Since the test voltage applied is only very low all sections of most semiconduct...

Страница 21: ...ould then be connected to the insulated COMP TESTER socket avoiding hum distortion of the test pattern Another way is a test pattern comparison to an identical circuit which is known to be operational...

Страница 22: ...Subject to change without notice 22...

Страница 23: ...of astigmatism 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 characteri...

Страница 24: ...eck of the mono channel display is unnecessary it is contained indirectly in the tests above stated Triggering Checks The internal trigger threshold is important as it determines the display height fr...

Страница 25: ...and also the influence of the earths magnetic field which is dependent on the instruments North orientation are corrected by means of the TR potentiometer In general the trace rotation range is asymme...

Страница 26: ...hanged Generally max halving or doubling of this resistance value should be sufficient A too small trigger threshold cause double triggering or premature trigger action due to interference pulses or r...

Страница 27: ...R ckgabe Beschreibung PC Scope Scope PC ID ID Daten CR LF data consits of instrument type manufacturer CR R CR LF remote status and baud rate acceptance TRSTA TRSTA b CR LF query for trigger status d...

Страница 28: ...nter 0 13 CH2 GND AC INV2 ON VALUE Counter 0 13 mv DIV 0000 20V DIV 1101 MODE CT XY A TR CHOP ADD 0 TR SOURCE 00 Y1 01 Y2 1x EXT TB1 x10 0 0 TB A TIME Counter 1 26 50ns DIV 00 bis 0 5s DIV 15hex TB2 0...

Страница 29: ...cy ranges AC 10Hz 100MHz DC 0Hz 100MHz HF 1 5kHz 100MHz LF 0Hz 1 5 kHz TV L to trigger on line sync pulses TV F to trigger on separated frame sync pulses Select SLOPE for the leading slope Sync pulse...

Страница 30: ...control for trace sharpness mechanical knob TR Trace rotation mechanical To align trace with horzontal field potentiometer graticule line Compensates adjustment with influence of Earth s magnetic scr...

Страница 31: ...triggering Not available in combination with ext triggering XY or COMP TESTER modes INPUT CH II Channel II signal input BNC connector Input impedance 1M II 20pF AC DC Selects input coupling of CH II...

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