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OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL
WARNING
Ageing-resistance material has been used in the CRT. In any case, the
screen can be damaged if a spot or a trace extremely bright is set on it
for a long time. So if an intense brightness is needed for a measurement
make sure to decrease intensity (INTEN) just after the measurement is
performed. You should get used to decrease brightness when your not
going to observe the oscilloscope for a while too.
3. Align the trace with the horizontal central line of the graticule by adjusting the
CH1
4. Adjust the
the graticule left end line.
4.2.2 Trace Rotation Adjustment
Preadjust the instrument until a trace just as indicated in the previous paragraph is
obtained.
Align the trace with the horizontal central line of the graticule by adjusting the CH1
POSITION control knob [40].
Is the trace is not parallel to the central line, adjust the TRACE ROTATION [5]
potentiometer by means of a suitable screwdriver until the trace becomes parallel.
4.2.3 Probe Compensation
Probe compensation desadjustment is, frequently, a measurement errors source.
Attenuated probes include a compensation adjustment. Get used to check probe
compensation before performing the measurements to assure optimum conditions
measurements.
Set the instrument as indicated in section 4.2.1.
Connect a probe (x10) to the CH1 input terminal [12] and connect the probe tip to
the CAL 2 Vpp terminal [1]. On the CRT screen should be displayed a square waveform
with four divisions amplitude (4 x 0.5 V/DIV = 2 Vpp).
If the displayed waveform is distorted, adjust the compensation trimmer on probe
for optimum square wave (minimum overshoot, rounding off and tilt). See figure 6.
November 2000
POSITION [40] control knob.
POSITION [34] control knob to align the left end of the trace with
Figure 6.- Probe Compensation.
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