Hameg HM 407A Manual
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Hameg HM 407A Manual

Hameg HM 407A Manual

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General Information ........................................................ 4
Symbols ......................................................................... 4
Use of tilt handle ............................................................ 4
Safety ............................................................................. 4
EMC ............................................................................... 5
Warranty ......................................................................... 5
Maintenance .................................................................. 5
Protective Switch-Off .................................................... 5
Power supply ................................................................. 5
Type of signal voltage ..................................................... 6
Amplitude Measurements ............................................. 6
Total value of input voltage ........................................... 7
Time Measurements ..................................................... 7
Connection of Test Signal ............................................. 8
Controls and readout ....................................................... 9
Menu ................................................................................ 22
First Time Operation ..................................................... 23
Trace Rotation TR ........................................................ 23
Probe compensation and use ...................................... 23
Adjustment at 1kHz ..................................................... 23
Adjustment at 1MHz ................................................... 24
amplifiers in Yt mode ................................................... 24
X-Y Operation ............................................................... 25
in DUAL mode (Yt) ....................................................... 25
Triggering and time base ............................................. 26
Automatic Peak (value) -Triggering ............................. 26
Normal Triggering ........................................................ 27
(Slope) .................................................................... 27
Trigger coupling ........................................................... 27
Triggering of video signals ........................................... 28
Line triggering (~) ........................................................ 28
Alternate triggering ...................................................... 28
External triggering ........................................................ 28
HOLD OFF-time adjustment ....................................... 29
(Only in analog mode) .................................................. 29
Delay / After Delay Triggering ..................................... 29
(Only in analog mode) .................................................. 29
Auto Set ........................................................................... 31
Save/Recall ..................................................................... 31
Component Tester (analog mode) ............................... 31
General ......................................................................... 31
Using the Component Tester ...................................... 32
Test Procedure ............................................................ 32
Test Pattern Displays ................................................... 32
Testing Resistors ......................................................... 32
Testing Capacitors and Inductors ................................ 32
Testing Semiconductors .............................................. 32
Testing Diodes ............................................................. 32
Testing Transistors ...................................................... 32
In-Circuit Tests ............................................................. 33
Storage Mode ................................................................. 33
Signal recording modes ............................................... 34
Vertical resolution ........................................................ 34
Oscilloscope
HM 407
GB
Horizontal resolution .................................................... 34
Alias signal display ....................................................... 35
Test Instructions ............................................................ 35
General ......................................................................... 35
Linearity, Raster Distortion .......................................... 35
Astigmatism Check ...................................................... 35
Calibration of the Vertical Amplifier ............................. 36
Transmission Performance .......................................... 36
of the Vertical Amplifier ............................................... 36
INVERT and X-Y Operation .......................................... 36
Triggering Checks ........................................................ 36
Time base ..................................................................... 37
Hold Off time (analog mode only) ............................... 37
Component Tester ....................................................... 37
Trace Alignment ........................................................... 37
Service Instructions ....................................................... 37
General ......................................................................... 37
Instrument Case Removal ........................................... 37
Caution ......................................................................... 38
Operating Voltages ...................................................... 38
Maximum and Minimum Brightness .......................... 38
Astigmatism control .................................................... 38
Trigger Threshold ......................................................... 38
Trouble-Shooting the Instrument ................................ 38
Adjustments ................................................................. 39
RS232 Interface - Remote Control ............................... 39
Safety ........................................................................... 39
Operation ..................................................................... 39
RS-232 Cable ............................................................... 39
RS-232 protocol ........................................................... 39
Baud-Rate Setting ........................................................ 39
Data Communication ................................................... 39
Front Panel HM407 ......................................................... 40

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Summary of Contents for Hameg HM 407A

  • Page 1: Table Of Contents

    Table of contents General information regarding the CE marking ..2 General Information ............4 Symbols ................. 4 Use of tilt handle ............4 Safety ................4 Intended purpose and operating conditions ....4 EMC ................5 Warranty ................. 5 Maintenance ..............

  • Page 2: General Information Regarding The Ce Marking

    Technical Manager/Directeur Technique General information regarding the CE marking HAMEG instruments fulfill the regulations of the EMC directive. The conformity test made by HAMEG is based on the actual generic- and product standards. In cases where different limit values are applicable, HAMEG applies the severer standard.
  • Page 3 X-MAG. x10: analog to 10ns/div., dig. to 0.1µs/div ±5%. Delay: 120ms - 200ns, variable, The worldwide success of HAMEG´s HM205 and HM305 has led to the Hold-off time (analog): variable to approx. 10:1. introduction of the new microprocessor controlled HM407 Analog/Digital Bandwidth X-amplifier (analog): 0-3MHz (−3dB).

  • Page 4: General Information

    General Information General Information The case, chassis and all measuring terminals are connected to the protective earth contact of the appliance inlet. The This oscilloscope is easy to operate. The logical arrangement instrument operates according to Safety Class I (three- of the controls allows anyone to quickly become familiar with conductor power cord with protective earthing conductor and the operation of the instrument, however, experienced users...

  • Page 5: Emc

    However, purchase of the HAMEG scope tester HZ 60, which despite its low price is highly suitable for tasks of this type, is very much...

  • Page 6: Type Of Signal Voltage

    Type of signal voltage Type of signal voltage The relationship between the different voltage magnitudes can be seen from the following figure. The oscilloscope HM407 allows examination of DC voltages and most repetitive signals in the frequency range up to at least 40MHz (-3dB).

  • Page 7: Total Value Of Input Voltage

    For sinewave signals with frequencies higher than 40Hz this influence is negligible. With the above listed exceptions HAMEG 10:1 probes can be used for DC measurements up to 600V or AC voltages (with a mean value of zero volt) of 1200Vpp. The 100:1 probe HZ53 allows for 1200V DC or 2400Vpp for AC.

  • Page 8: Connection Of Test Signal

    Y-input of the oscilloscope. When using a 50Ω cable such as the HZ34, a 50Ω through termination type HZ22 is available from HAMEG. When transmitting square signals with short rise times, transient phenomena on the edges and top of the signal may become visible if the correct...

  • Page 9: Controls And Readout

    Standard attenuator probes on the oscilloscope normally reduce its bandwidth and increase the rise time. In all cases where the The large front panel is, as is usual with Hameg oscilloscopes, oscilloscope bandwidth must be fully utilized (e.g. for pulses is marked with several fields.
  • Page 10 Controls and readout that the “RM” LED is lit, all electronically selectable The oscilloscope is in analog mode if none of the LED’s controls on front panel are inactive. This state can be left associated with the STOR.MODE (9) pushbuttons are lit by depressing the AUTOSET pushbutton provided it was and a pre- or post-trigger value (PT...%) is not indicated by not deactivated via the interface.
  • Page 11 Controls and readout For additional information regarding the digital mode, see following sequence: PT0%, PT25%, PT50%, PT75%, section STORAGE OPERATION. PT100%, PT-75%, PT-50%, PT-25% and back to PT0%. The values refer to the X-axis (graticule) of the screen HOLD display (10% = 1div). STORAGE MODE ONLY The following description assumes that the X magnifier Briefly pressing the STOR.
  • Page 12 Controls and readout If digital SINGLE (SGL) mode has not been chosen, one In this case also several signal acquisition scans are of the associated LEDs is lit. The signal capture and required; hence, it is similar to Refresh operation. The display mode can be selected by pressing one of the signal is averaged over the several acquisitions so that buttons.
  • Page 13 Controls and readout In this operating mode a single signal acquisition process Single events recorded in DUAL mode can also be or sweep can be started with a trigger, providing the displayed in the XY mode when switched over to XY trigger circuit has been previously activated with RESET.
  • Page 14 Controls and readout must be performed twice. At first REFERENCE memory If automatic triggering (AT) is present and the input is set I must be displayed and then overwritten. Then REFE- to GD (33), the vertical trace position corresponds with 0 RENCE memory II must be chosen and overwrittten.
  • Page 15 Controls and readout Attention! The trigger point symbol is automatically switched off in In XY mode the 0 Volt reference symbol is automatically those modes where there is no direct relation between switched off. the trigger signal and the displayed signal. STORAGE MODE ONLY ANALOG MODE ONLY The Y-POS.
  • Page 16 Controls and readout Turning the control knob clockwise increases the sensitivity DUAL mode (decreases the deflection coefficient) in a 1-2-5 sequence Briefly pressing this button switches over to DUAL and decreases the sensitivity (increases the deflection mode. Both deflection coefficients are then displayed. coefficient) if turned in the opposite direction (ccw.).
  • Page 17 Controls and readout ANALOG MODE ONLY Each condition is indicated by the associated LED. The trigger All trigger and time base related controls as well as the Y- point symbol is switched off in external trigger condition. POS. I (13) knob are deactivated. For X position alteration, the X-POS.
  • Page 18 Controls and readout vernier (variable). The current setting is displayed by the is automatically set to minimum when the time base is VAR-LED located above the knob. After switching the changed. (For the application of hold off time setting see VAR-LED (24) on, the deflection coefficient is still the paragraph with the same heading).
  • Page 19 Controls and readout None of these will appear in the readout in undelayed time In the case of untriggered ”DEL” (DELAY) mode (29), base operation. briefly pressing the button switches over to ”DTR” (triggered DELAY mode). Thereby, the previously active When ”SEA”, ”DEL”...
  • Page 20 (hardcopy) if the following preconditions are met: (37) GD - INV. - Pushbutton with two functions. 1.The oscilloscope must be connected to the external HAMEG interface HO79-6. Each time this pushbutton is pressed briefly, the input is 2.The software version installed in HO79-6 should not be switched from active to inactive and vice versa.
  • Page 21 Controls and readout The PRINT function replaces the actuation of the HO79- applied causing an X and a Y deflection. The deflection 6 ”START” pushbutton, which may not be accessible coefficient selected for each channel may be different, thus as in DUAL mode the ∆ ∆ ∆ ∆ ∆ V cursor measurement (e.g.

  • Page 22: Menu

    1.2.1.3 QUICK START ON/OFF (44) CAL. - Pushbutton and concentric socket. In condition ON the HAMEG logo and the menus will not be displayed after switching the instrument on. Then the A squarewave signal of 0.2Vpp ±1% is available from the instrument is quickly ready for operation.

  • Page 23: First Time Operation

    As Adjustment at 1kHz long as the HAMEG logo is visible different internal checks are made. Thereafter the instrument will revert to its last used operating mode.

  • Page 24: Adjustment At 1Mhz

    First Time Operation Connect the probes (Types HZ51, 52, 54, or HZ36) to the CH After completion of the HF-adjustment, the signal amplitude I input. Set the deflection coefficient to 5mV/div and the input displayed on the CRT screen should have the same value as coupling to DC.

  • Page 25: X-Y Operation

    Operating modes of the vertical amplifiers in Yt mode Antiphase input voltages: No invert function active = difference. Channel II invert function active = sum. In the ADD mode the vertical display position is dependent upon the Y-POS. setting of both channels. The same Y deflection coefficient is normally used for both channels with algebraic addition.

  • Page 26: Measurement Of An Amplitude Modulation

    Triggering and time base In the example illustrated, t = 3div and T = 10div The phase • Triggering: Normal; with LEVEL-setting; internal difference in degrees is calculated from (or external) triggering. If the two values a and b are read from the screen, the modulation factor is calculated from or expressed in radians where a = U...

  • Page 27: Normal Triggering

    Triggering and time base voltage point on the trigger signal (trigger point), by the The time base generator can be triggered by a rising or falling adjustment of the trigger level control. The control range edge of the test signal. Whether the rising or the falling edge depends on the peak to peak value of the signal.

  • Page 28: Triggering Of Video Signals

    Triggering and time base Triggering of video signals This trigger mode is present if the ~ LED is lit (26). The trigger point symbol is inactive in line/mains trigger mode as there is In TV-L and TV-F trigger coupling mode the instrument is no direct amplitude relationship between the trigger voltage automatically set to automatic triggering and the trigger point and the signal voltage.

  • Page 29: Trigger Indicator "Tr

    Triggering and time base coupling is not set to line/mains trigger coupling. Then the signal, required for evaluation, is easily obtainable by expanding internal trigger source is deactivated. As the external trigger the hold off time until one signal is displayed. signal applied at the TRIG.
  • Page 30 Triggering and time base If the display shows jitter, it is possible to select for (second) Example: triggering after the elapsed delay time (DELay TRIGger = The SEARCH setting selected in figure 2 is 5ms/cm. The DTR). As mentioned before, it is possible to display video display in DELAY mode, also with 5ms/cm is delayed but signals using the frame sync pulses for triggering (TV-F).

  • Page 31: Auto Set

    Auto Set - Save/Recall Of course, the magnification is not restricted to a factor 50 as • Trigger level in electrical midrange position mentioned in the example. The limit is given by the increasing • Y deflection coefficient(s) calibrated between 5mV/div and loss of trace intensity as the magnification is increased.

  • Page 32: General

    Component Tester (analog mode) Component Tester (analog mode) slope is determined by the resistance of the resistor under test. With high values of resistance, the slope will tend General towards the horizontal axis, and with low values, the slope will move towards the vertical axis.

  • Page 33: Testing Transistors

    The analog mode offers an unsurpassed faithful signal display. In case of doubt, one component terminal may be unsoldered. With the combination of analog and digital oscilloscope, HAMEG Subject to change without notice...

  • Page 34: Signal Recording Modes

    25 samples per division. For a given time base setting the HAMEG instrument samples at a 4 (compared to VGA) or 8 ( referred to LCD) times higher sampling rate. The AVERAGE and ENVELOPE are REFRESH sub-modes and described in section “Controls and readout”...

  • Page 35: Alias Signal Display

    - Channel I by itself accordance with international standards (see CRT data book). - Channel II by itself These limit values are strictly supervised by HAMEG. The - Channel I and II simultaneously selection of a cathode-ray tube without any tolerances is - The sum or difference of both channels practically impossible.

  • Page 36: Calibration Of The Vertical Amplifier

    A suited generator for this test display height from which a signal will be stably displayed. It is HZ60 from HAMEG. should be approx. 0.3-0.5div for the instrument. An increased trigger sensitivity creates the risk of response to the noise Of course, the quality of the transmission performance is not level in the trigger circuit.

  • Page 37: Time Base

    For any further technical information check is only necessary after changing the cathode-ray tube. call or write to HAMEG . Addresses are provided at the back of the manual. It is recommended to use only the original If a precise marker signal is not available for checking the Time...

  • Page 38: Caution

    Service Instructions panel can withdrawn forward. When the chassis is inserted adjustment is achieved, when the trace can be blanked in XY into the case later on, it should be noticed that the case has to analog mode and, in addition, when the requirement described fit under the flange of the front panel.

  • Page 39: Adjustments

    0.2ms and causes a break on the PC. In case of disregard of the safety warnings contained in this Data Communication manual, HAMEG refuses any liability regarding personal injury and/or damage of equipment. After successfully being set to remote control mode, the Operation oscilloscope is prepared for command reception.

  • Page 40: Front Panel Hm407

    Front Panel HM407 Subject to change without notice...

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