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HAMEG. OSCILLOSCOPE HM Specification. TLOPL HH4E. Vertical Deflection (Y). Bandwidth: of both channels. DC MHz (-3dB), DC MHz (- 6dB). OSCILLOSCOPE HM I Overscanning I Bandwidth DC MHz H Delayed Sweep H LPS Triggering to 40 MHz The HM demonstrates the. Hameg HM Oscilloscope problem. «on: January 16, , pm». Hey guys. The other day i went to the old stuff market and saw this oscilloscope.

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Oscilloscope HM412

If necessary, the measuring amplifier can be calibrated with an accurately known DC voltage DC-input coupling. Because the area around the CRT is relatively small, a tenacious adhesive tape will be a good help for tube rotation.

Therefore, when the voltage loss due to the attenuation of hajeg probe can be compensated by a higher sensitivity setting on the HM, the probe should always be used, also um should be remembered that the series impedance of the probe provides a certain amount of protection for the input of the oscilloscope amplifier.

For “Mono” operation all pushbuttons should be in the “out” position, the instrument is then operating on Channel I only. After this adjustment, a square- wave signal should be displayed and be verified once more in 41 with the Test Instructions. The blanking of the CRT is controlled by an opto-coupler. Sweep Delay Ranges 7 decade steps, ns – 1 s with fine control, ratio 10 ; 1.

An alternative method is to check the shape of the spot with both vertical inputs switched to the “GD” posi- tion and the “Hor. In the case of complete overscan both LED’s are illuminated.

To obtain a stably triggered display in these cases, it may be necessary to use the timebase variable control or the sweep bm facility.

The basic requirement for this is a correct DC-balance align- hhm on the input of the vertical amplifier see Operating Instructions. With signals with an extremely slow repetition rate the action of the LED is more or less flashing. Conversely, it should be ob- served that sinusoidal voltages indicated in Veff Vrms have 2.


HZ 62 and HZ 64 instruments. One side of the case has a compartment which can be used to carry accessories, tools and spares. The logical arrangement of the controls and connectors on the front panel ensures that the user will quickly become familiar with the operation of the instrument.

In this case, the connecting cable is matched hamg to the high impedance input of the oscilloscope. The trigger can be derived from the test signal itself when internal triggering is selected or from a frequency related signal applied to the external trigger input.

This means that the sensitivity range and in- put impedance are identical for both the X and Hajeg axes. In this mode a baseline will be 42 In the absence of a test signal. In “AC” position, a 30Hz signal requires a trigger voltage of approx. A few degrees of misalignment can be corrected by a preset resistor accessible through an opening on the front panel marked “TR”.

The sweep delay facility is particularly useful for the analysis of complex waveforms, for instance the colour burst in a composite video signal can be expanded to cover the full display area. Input resistance 10 Megohm. Full use has been hqmeg of the Latest Technology with integrated circuits and discrete semiconductors being combined for optimum performance.

HAMEG hm 412 Oszilloskop Oscilloscope

Larger deviations indicate that changes have occurred in the amplifier. While the adjustment is ac- complished with depressed “Hor. The number yameg cycles displayed will increase with the time coefficient. When using the HZ 37 the input voltage to the oscilloscope is reduced by a factor of It should be noted that all attenuator probes must be compensated in conjunction with the oscilloscope.

When investigating square or pulse waveforms with fast risetimes, transient phenomena on both the edge and top of the signal may become visible if the correct termination is not used. Missing deflecting plate voltages is probably hamwg by a defect in the power supply.

Astigmatism Correction The ratio of vertical and horizontal sharpness can be adjusted by the variable resistor of 50kQ, located near to the hameh edge of the Z-board see Adjusting Plan.


An ab- sent trace in spite of correct plate voltages means a fault in the CRT circuit. Initially, the Sweep Delay mode slide switch should be set in the “norm. Nevertheless, a compo- nent may only fail after a gm period of operation.

Compensation range pF. It is recommended to use only the original packing material when the instrument will be shipped to HAMEG for service or repair.

SI nately tightened turn by turn, otherwise the CRT might be misaligned again.

SM5CBW’s Hameg Oscilloscope Presentation

The risetime of the signal can be calculated using the following formula. All knobs and switches should again be checked to ensure that the correct positions have been selected.

Located on the upper right, next to the CRT, is the power switch and indicating lamp; the in- tensity, focus, horizontal position and trace rotation controls together with the graticule illumination slide switch are also in this section. All variable control knobs with ar- rows should be in the haneg anti-clockwise “Cal. It should be noted that this value is reduced at higher frequencies. In view of this, accurate evalua- tion of such signals with the HM41 2 is only possible up to a maximum repetition rate of 2MHz.

In the alternate trigger mode the source is taken alter- natively from channels I and IIthis enables signals which are not frequency related to be triggered.

However, smaller signals than this may also be displayed. The signal has an amplitude of 0. Fully matched X-Y operation is available, also the channels can be Added or Subtracted.

Trigger and Timebase To achieve a perfectly stable display the correct set- tings of the timebase and trigger controls is most im- portant. Also the precise measure- ment for the delayed portion of the waveform is possible.