Hameg HM 604 Manual
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Hameg HM 604 Manual

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Technical Data
. . . . . . . . . . . . . . . . . . . . . Z 1
Accessories
Mains/Line voltage change
Function of variable HOLD OFF control
Short Instruction
Front Panel Elements
Folder with Front View
CHOP., INV. l/II and XY-Betrieb
Subject to change without notice
P 1
M 2
Service Instructions
General . . . . . . . . . . . . . . . . . . . . . . . S 1
Operating Voltages . . . . . . . . . . . . . . . . . S 1
Minimum Brightness . . . . . . . . . . . . . . . . S 1
Astigmatismus control . . . . . . . . . . . . . . . S 1
M l 3
Trouble Shooting the Instrument . . . . . . . . . . S 2
Replacement of the Power Transformer . . . . . . S 2
Adjustments
Circuit Diagrams
Block Diagram
Wiring Diagram
Identification of Components
Y Input, Attenuator, Preamplifier CH. l/II
2
Y intermediate Amplifiers, Trigger Pre-Amplifiers,
Y Final Amplifier
T 1
Post Trigger, Field Selector
X Final Amplifier, Calibrator
CRT and HV circuit
Power Supply
T 2
Component Locations
XY Board
TB Board
PTFS Board
TBG, CAL, YF Boards
CO, EY, Z Boards

Table of contents

Oscilloscope
HM 604
. . . . . . . . . . . . . . . . . . . . S 3
D 1
D 2
D 3
D 4
D 5
D 6
D 7
D 8
D 9
D12
D13
D14
D15
D16
D17
D18
9.88. 604

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Summary of Contents for Hameg HM 604

  • Page 1: Table Of Contents

    Type of Signal Amplitude Measurements Time Measurements Connection of Test Signal Oscilloscope Operating First Time Operation HM 604 Trace Rotation TR DC Balance Adjustment Use and Compensation of Probes Operating Modes of the Y Amplifier X-Y Operation Ml 0 Service Instructions...
  • Page 2 Total acceleration voltage: 12 kV. Trace rotation: adjustable on front panel. With this state-of-the-art oscilloscope, HAMEG again sets a new price/ Calibrator: square-wave generator switchable performance standard which is not likely to be met by others in this category.
  • Page 3 An exact HF-compensation, however, is only possible with square- Viewing Hood HZ47 wave generators having a risetime <5ns. Most HAMEG scopes already feature such a calibration generator. For other oscillo- HM408, HM604, HM605 For HM203, HM204, HM205, HM208, scopes, it is available as accessory item HZ60-2.

  • Page 4: Operating Instructions

    Operating Instructions General Information Safety This oscilloscope is easy to operate. The logical arrange- This instrument has been designed and tested in accor- ment of the controls allows anyone to become familiar with dance with IECPublication346,SafetyRequirementsfor the operation of the instrument after a short time, however, Electronic Measuring Apparatus, and has left the factory experienced users are also advised to read through these in a safe condition.

  • Page 5: Operating Conditions

    -40°C ments. However, purchase of the new HAMEG scope test- er HZ 60, which despite its low price is highly suitable for The maximum operating altitude is up to 2200m (non- tasks of this type, is very much recommended.

  • Page 6: Type Of Signal

    All types of signals with a frequency spectrum below sulting peak-to-peak value must be divided by 2x- = 60 MHz can be displayed on the HM 604. The display of sim- 2.83. Conversely, it should be observed that sinusoidal volt- ple electrical processes such as sinusoidal RF and AF sig- ages indicated in V,,, (V,,,) have 2.83 times the potential dif-...

  • Page 7: Time Measurements

    However, these three values are not freely selectable. They It is very important that the oscilloscope input coupling is have to be within the following limits (trigger threshold, ac- set to DC, if an attenuator probe is used for voltages higher curacy of reading): than 400V (see page M6: Connection of Test Signal).

  • Page 8: Connection Of Test Signal

    Displayed ripple wavelength L = 1 cm, If magnification is used, this product must be divided by 10. set time coefficient T, = 10 ms/cm, The fall time of a pulse can also be measured by using this required ripple freq. F = 1 : (1 .10.10-3) = 100Hz. method.

  • Page 9: Operating

    HM 604, the probe should always be used. Also it should be The X-Section, located on the upper right, next to the screen,...

  • Page 10: First Time Operation

    The HM 604 accepts all signals from DC (direct voltage) up To obtain the maximum life from the cathode-ray tube, the to a frequency of at least 60MHz (-3dB). For sinewave minimum intensity setting necessary for the measurement voltages the upper frequency limit will be 80MHz. How- in hand and the ambient light conditions should be used.

  • Page 11: Use And Compensation Of Probes

    Using the probes HZ51, 52, and 54, the full bandwidth of probes. Only this type of construction ensures the extremely short ground connections which are essential for the HM 604 can be utilized without risk of unwanted wave- an undistorted waveform reproduction of non-sinusoidal form distortion.

  • Page 12: Operating Modes Of The Y Amplifier

    Providing these essential features, as well as switch-select- able output-frequencies, the calibrator of the HM 604 can, under certain conditions, replace expensive squarewave generators when testing or compensating wideband- attenuators or -amplifiers.

  • Page 13: X-Y Operation

    CH l/II -TRIG. l/II For Mono operation with Channel II, the nal frequencies up to 120 kHz. However, above this fre- DUAL pushbutton has to be pressed. When the button is quency the inherent phase difference between the vertical depressed, the HM604 is in Dualchannel operation. In this and horizontal system makes accurate measurements dif- mode, the channels are displayed consecutively (alternate ficult.

  • Page 14: Measurement Of An Amplitude Modulation

    Figure 2 Amplitude modulated oscillation: F = 1 MHz; 1 kHz; 50 % 28.3 mVrms. Dual-Trace Phase Difference Measurements Oscilloscope setting for a signal according to figure 2: T = Horizontal distance foroneperiod(cm). t = Horizontal distance of zero-crossing points (cm). CH.

  • Page 15: Triggering Of Video Signals

    TV SEP. switch is in off position. The HM 604 has 4 coupling modes: When in V mode, it is possible to select field I or II by releas- LF, HF.

  • Page 16: Sweep Delay /After Delay Triggeringe

    Function of var. HOLD-OFF control In DEL. TRIG. mode SEP. switch in H or V position, after delay triggering to the next following line is possible. If it is found that a trigger point cannot be located on ex- Therefore discrete lines are representable. The slope is ap- tremely complex signals even after repeated and careful ad- pointed by the TV+ or N- position of the delay switch.
  • Page 17 If a display is not obtained in this mode, then a lower delay If the timebase sweep speed is increased (rotate TIME/ time range should be selected. For example, when inves- DIV. switch clockwise), then the short time interval will be tigating the waveform shown in the figures, a display could expanded.

  • Page 18: Delay Mode Indication

    General A built-in quick-acting fuse protects the CTand the oscillo- The HM 604 has a built-in electronic Component Tester (ab- scope against mis-operation, e.g. device under test not dis- breviated CT), which is used for instant display of a test pat- connected from mains/line supply.
  • Page 19 Testing Capacitors and Inductors diodes. Possibly a small portion of the knee is visible. Z- only Capacitors and inductors cause a phase difference be- diodes always show their forward knee and, up to approx. tween current and voltage, and therefore between the X 1 OV, their Z-breakdown, forms a second knee in the oppo- and Y deflection, giving an ellipse-shaped display.

  • Page 20: Miscellaneous

    Miscellaneous Pay attention to the usual caution with single MOS-com- ponents relating to static charge or frictional electricity! A posifive-going sawtooth voltage of approximately SV, In-Circuit Tests coincident with display’s sweep time is available at a BNC Caution! During in-circuittests make sure the circuit is output connector on the rear panel.

  • Page 21: Test Patterns

    Test patterns Single Transistors Short circuit Resistor 510 Q Junction B-C Junction B-E Mains transformer prim. Capacitor 33 vF Junction E-C Single Diodes In-circuit Semiconductors Z-diode under 8V Z-diode beyond 12V Diode paralleled by 6800 2 Diodes antiparallel Diode in series with 51 Q B-E paralleled by6808 Silicon diode Germanium diode...
  • Page 22 COMPONENT TESTER button. Connect both component terminals to CTand ground jacks. Press Circuit under test must be disconnected to battery or power (pull out power plug), /n-circuit test: signals and ground (earth). Remove all signal connections to HM 604 (cable, probe), then start testing. Subject to change without notice...

  • Page 23: Test Instructions

    Operating (page M 7). Instructions Normally, the CRT of the HM 604 has very good brightness. Any reduction of this brightness can only be judged visually. The symmetry of Channel I and the vertical final amplifier...

  • Page 24: Transmission Performance Of The Vertical Amplifier

    direct connection is made between the 0.2 mV output and attenuators and readjust them as necessary. A compen- the input of the vertical amplifier, the displayed signal in the sated 2:1 series attenuator is also necessary, and this CAL.) position (variable control to should be must be matched to the input impedance of the oscillo- scope.

  • Page 25: Triggering Checks

    IOOMHz at a display height of approx. when the HF trigger coupling mode is set. HM 604 is given as +3%, but as a rule it is considerably bet- ter than this. For the simultaneous checking of timebase For external triggering (EXT.

  • Page 26: Sweepdelay

    I V/cm; Timebase to one step slower sweep speed With connection of the CTsocket to one of the ground jacks than on the HM 604 under test. The latter must have no input in the Y-Section, a vertical straight line with approx. 6cm and no trigger voltage (free-running sweep;...
  • Page 27 CH.1 tor. Settings: attenuator switch to (optional) attenuator switch to input coupling to DC, Checking the blanking facility on the 2 modulation connec- input coupling to GD, TIMEIDIV. switch to 0.5ms/ tor (rear panel) is possible with a sine- or square-wave cm, automatic triggering (LEVEL knob in AT position), generator.

  • Page 28: Instrument Case Removal

    Handling of the CRT needs utmost caution. The glass the HM 604, if the nominal values do not meet the specifica- bulb must not be allowed - under any circumstances - tions. These instructions primarily refer to those faults, to come into contact with hardened tools, nor should it which were found after using the Test Instructions.

  • Page 29: Trouble Shooting The Instrument

    If trouble is suspected, visually inspect the instrument tions. The HAMEG Service Department can give you advice thoroughly after removal of the case. Look for loose or badly for troubleshooting and replaceable parts. Replacement...
  • Page 30 Adjustments After replacing the power transformer, all remaining bits of wire, solder and other foreign matter must be removed from the PCBs, the vicinity of the power transformer and As advised in the Operating, Test and Service Instructions, small corrections and adjustments are easily carried out from within the insulating connecting box by shaking, with the aid of the Circuit Diagrams and Adjusting P/an.

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