HAMEG HM 412 PDF

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 phase shift is 3 degrees at 1 0OkFIz. As the HM is a fully transistorized oscilloscope the heat generation of the instrument is very low, thus ensuring long term reliable operation.

The trimmer can be adjusted to equal the input capacitance of the oscilloscope, then the impedance of the HZ 23 is equal to the specified Input impedance of the oscilloscope under test. HZ 30 Oscilloscope Probe x 10 The HZ 35 is a straight through probe without attenuation and therefore allows the full sensitivity of the oscilloscope to be used. This means that the sensitivity range hame in- put impedance are identical for both the X and Y axes.

Check for a negligible trace widening and periodic shadowing in the chopped mode. A cer- tain loss of marginal sharpness of the CRT is gm, this is due to the manufacturing pro- cess of the CRT. Input resistance 10 Megohm.

Alteration of the trigger threshold is only possible internally. The LED in the delay section is not illuminated in this mode. Almost every early failure can be detected by means of intermittent operation during this test. For precise determina- tion set the peak of the first marker or cycle peak ex- actly behind the first vertical graticule line using the “X-POS. Astigmatism Check It should be checked whether the horizontal and ver- tical sharpness of the display are equal.

The maximum ratings are specified on the circuit diagrams.

Today the BNC connection system is the most widely used type in the commercial electronics field, and the HZ 34 gives the user a test cable with specified characteristics. Reference position; probe tip grounded via 9 Megohm, oscillo- scope input grounded. If an attenuator probe XI 0 is used, it should be remembered that a further multiplication by a factor of hwmeg is required to ascertain the correct voltage value.

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For RF suppres- sion the output signal is derived via a low-pass filter. Ahmeg method employed is as follows.

SM5CBW’s Hameg Oscilloscope Presentation

HZ34 must be terminated at the vertical input of the oscilloscope with a resistor equal to the characteristic impedance of the cable e. It is recommended that any adjustments that have to be carried out inside the instrument are undertaken by qualified personnel.

Nevertheless, this cannot be entirely avoided, even in fully serviceable in- struments. The LED is located above the timebase switch to the right. An increased trigger sensitivity creates the risk of response to the noise level in the trigger circuit. In the X-Y mode the horizontal signal is derived from channel II so that both the 4112 and vertical channels have the same input impedance and sensitivity range.

This unit contains the three-pin power connector.

Sometimes the trace will disappear after an in- put signal has been applied. It is important to note that the x5 magnifier in- corporated in the “X-POS. In accordance with standard safety regulations, the earth wire must not be disconnected.

With composite signals, the trigger facility is dependent on the occurence of certain periodically recurring levels. When gameg at mains frequency, actuation of the “TV” push button should have no effect. Symmetry and Drift of the Vertical Amplifier Both of these characteristics are substantially deter- mined by the input stages of the amplifiers. As the band- width of the amplifiers differ normally between 20 and 25MHzthe measured values in hhameg upper limit range cannot be defined exactly.

It should be noted that the HZ62 may be used to calibrate oscilloscopes manufactured by other com- panies.

Oszilloskop HM412-5

It should be noted that if the change is less than 1 mm after a 20 minute warm-up period then the instrument is within specification. Because each LED is correlated with one of both possible directions the beam position is known even if the beam is not visible, or the horizontal deflection is missing, or the vertical positioning control have been adjusted improperly. Maximum and Minimum Brightness Two variable resistors of kQ each, located on the upper edge of the vertical positioned Z-board, are us- ed for these adjustments see Adjusting Plan.

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Dimensions for the carrying case are x x mm, while the compartments measure- ments are x x 50 mm. The correct display is shown in the following figure. Focus the horizontal tops of the square-wave signal at normal intensity, then check the sharpness of the vertical edges.

It is important that this attenuator is screened. After switching to “delay” the display is fully visible; the delay mode indication shows continuously. When investigating pulse or square waveforms the critical feature is the risetime of the voltage step. If this is not done, serious signal deformation may result from any spuri- ous currents through the ground leads or test chassis parts.

Two BNC sockets for Z modulation input and ramp output are mounted on the rear panel of the instrument. Conversely, it should be ob- served that sinusoidal voltages indicated in Veff Vrms have 2. By adjusting the seven position delay range switch and twenty turn precision fine control the commencement of the trace can be set just prior to the short time interval to be investigated.

It should be remembered that this capacitor must have a sufficiently high breakdown voltage. In “search” position the delay mode indicator is flashing. If magnification is used, this product must be divided by 5. Accessories supplied; Sprung Hook. This is also true with any input signal. Operation of the sweep delay is relatively easy, as only 3 controls need to be used: It is strongly recommended that when the instrument needs to be returned that the original packing should be used to avoid possible transport damage.