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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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The control range for max- imum and minimum brightness intensity must be such that the beam just disappears before reaching the left hand stop of the “INTENS. With higher tolerances it should first be in- vestigated whether the cause lies within the amplifier or in the amplitude of the square-wave signal. Hsmeg common-sense will certainly be required when a complex fault has to be investigated. This is achieved by adjusting hmeg trim- mer located in the 2: The X-signal is then de- rived from Channel II.

Y Overscanning Indication Two light-emitting diodes, located above the vertical input attenuators, show any overscanning of the usable screen dimensions in the vertical direction. Transmission Performance of the Vertical Amplifier The transient response and the phase compensation can only be checked with the aid of a square-wave generator with a fast risetime max.

If a smaller display is acceptable it is possible to investigate signals up to about 40 MHz. When the Sweep Delay mode slide switch is set to the “norm.

Full text of “Hameg: hm 4 man”

The instrument is designed so that even incorrect operation will not cause serious damage. Haemg the BNC and 4 mm signal plug have anti-kink mouldings while the 4 mm earth lead is fine stranded wire, to minimize the risk of the cable breaking. Larger deviations indicate that changes have occurred in the amplifier. It is recommended to operate only in the sequence “norm.


A few degrees of misalignment can be corrected by a preset resistor accessible through an opening on the front panel marked “TR”. The load resistance should not be less than lOkQ. As with all HAMEG oscilloscopes, the front panel is subdivided into sections according to the various functions. In view of this, hammeg evalua- tion of such signals with the HM41 2 is only possible up to a hameb repetition rate of 2MHz.

It is recommend- ed to check the ripple and also the interaction from other possible sources.

Oszilloskop HM412-5

For correct operation the termination I must be connected directly hamge the oscilloscope input, otherwise the test signals, irrespective of its fundamental shape, will be de-: Accessories optional Attenuator Probes xIO and x This tech- nique ensures reliable triggering on low level signals up to 40 MHz. The probe trimmer is then adjusted by using the trim- ming tool supplied.

Pay attention to the Overscanning Indication see next paragraph. Probe Adjustment To achieve the undistorted display of signals when using an XI 0 or XI 00 attenuator probe the probe must be compensated to match the input impedance of the vertical amplifier. This termination should be used to I terminate signal generators and koax -cables which have a 50 ohm characteristic impedance.

These facilities coupled with graticule illumination, Z Modulation, and a square-wave calibrator make the HM a very versatile instrument.

With dual mode it is the same. With composite signals, the trigger facility is dependent on the occurence of certain periodically recurring levels.

Maximum deviations of 1. If pumping does occur it is normally due to a fault in the stabiliza- tion circuit for the high voltage supply. Trigger Indicator An LED on condition indicates that the timebase is triggered and will produce a stable display. This mode is par- ticularly useful when asynchronous signals are being investigated. Checking of the internal Gameg is possible with a video signal of any given polarity. With signals with an extremely slow repetition rate the action of the LED is more or less flashing.


In the absence of an input signal the baseline will only be displayed if this control is in the fully anti-clockwise position marked “AT” Automatic Triggering. AC Voltage Change The instrument has a power plug-in unit at the rear. Excessive values might be very often the reason for incomprehensible faults.

HAMEG hm 412 Oszilloskop Oscilloscope

A built-in 1 kHz square -wave hamegg can be used to check amplifier calibration and probe alignment. If repositioning of the CRT is required the procedure described in the Service Instructions should be followed. However, when in- vestigating signals at frame rate, the “TV” pushbut- ton must be depressed.

Internally the printed circuit boards are easily accessable to facilitate ease of main- tainance, should this be required. Sometimes such effects occur after long periods of operation.

HAMEG hm Oszilloskop Oscilloscope | eBay

This probe is connected to the test circuit by a sprung hook and integral ground lead with an insulated crocodile clip. All push buttons should be in the “out” position. In the xlO mode the characteristics are the same as the HZ In “AC” position, a 30Hz signal requires a trigger voltage of approx. In addi- tion, and especially when investigating square or pulse waveforms, a resistor equal to the charac- teristic impedance of the cable must also be con- nected to the cable at the input of the oscilloscope.

In this case, the connecting cable is matched directly to the high impedance input of the oscilloscope. In almost any case, the faulty section can be located.