HAMEG HM 208 PDF

Mezibar New storage is only possible on each channel when the relevant button is released out. However, the AT position is used for the rol- ling mode described further below provided the LEVEL knob is correctly adjusted, a display as in the refresh mode results: The frequency limit in the X direc- tion is approx. It should always be as close as possible to the measuring point. Frequency and pulse duty factor are not critical here. Should the value marked with the arrow on the rear cover not agree with the existing mains voltage, the unit must be switched over according to the instructions on page M2.

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These are percentages which refer to the horizon- tal screen width of mm, counting from left to right. The time coefficient can be changed within a large range as required.

Direct voltages are suppressed but load the oscil- loscope input coupling capacitor concerned! Therefore, if the voltage loss due to the attenuation of the probe can be compen- sated by a higher amplitude setting, the probe should always be used.

The calibrator of the HM can even replace expensive square wave generators with these properties and the switchable frequency, e. The time base is completely switched off in the real time X-Y mode.

In this case, special safety precautions are to be taken, which must be supervised by qualified per- sonnel if the voltage is higher than 42V. However it should be noted that even above 50 kHz, a noticable phase difference between Hmm and Y occurs and this increases with frequen- cies.

The faster line pulses are then attenuated by a low pass filter to such an extent it is easily possible to trigger on the leading or trail- ing edge of the frame-synchronizing pulse using the level control. Decreases deflection by a factor of 2. It is essential that it has sufficient breakdown strength. In MONO mode display of the sum or difference depressed in addition of two signals. In roll mode the HM functions very similar to a chart recorder, with the signal running slowly from right to left with continous trace.

Amplitude variable control center pot. The current time sweep is inter- rupted. Adjusts vertical position of trace for Channel 1 and Channel II. HAMEG Hm Oscilloscope 20mhz Digital Storage Generally when displaying different signals, both sig- nal voltages should only be picked up with attenuator probes of absolutely the same impedance and attenuation.

Pre-triggering The course of the signal can be followed in particular before and possibly also after the set trigger point with pre-trig- gering. The same attenuator switch position is normally used for both channels with algebraic addition.

When the attenuator probe is connected to a BNC-socket, a BNC- adapter, which is often supplied as probe accessory, should be used. In the case of a complaint, a label should be attached to the housing of the instrument which describes briefly the faults observed.

Each signal change is immediately detected. This hsmeg circuit should be repeated several times im- portant when changing tubes! Fine control knob in the CAL. Their position does not influence the result. The complete signal display reappears immediately on the screen.

Adjust the trimmer with the insulating screw driver provided until the tops of the square wave signal are exactly parallel to the horizontal graticule lines see 1 kHz diagram. Plug according to DIN5 pole. It should always be as close as possible to the measuring point. The same procedure applies for Channel II single channel display and storage. However, as the bandwidths of the vertical amplifiers differ normally between 20 and 25 MHzthe measured values in the upper limit ranges cannot be defined so exactly.

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HAMEG HM 208 PDF

Moogumi Single component and in-circuit tests are both possible. Also these probes do not normally have compensation facilities. It can be switched over to other voltages at the fuse holder combined with the 3-pole appliance inlet nameg the rear of the instrument. When displaying very low frequency pulses, the flat tops may be sloping with AC coupling of the vertical amplifier AC limit frequency approx.

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These are percentages which refer to the horizon- tal screen width of mm, counting from left to right. The time coefficient can be changed within a large range as required. Direct voltages are suppressed but load the oscil- loscope input coupling capacitor concerned! Therefore, if the voltage loss due to the attenuation of the probe can be compen- sated by a higher amplitude setting, the probe should always be used. The calibrator of the HM can even replace expensive square wave generators with these properties and the switchable frequency, e. The time base is completely switched off in the real time X-Y mode.

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