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Operation
15
Notes
- If the time base line cannot be displayed by means of knobs "<—X-V*
and "|Yj", potentiometer "DC-Balance" of the Y amplifier (accessible
on the left-hand side of the apparatus) must be turned until the time
base line appears. This potentiometer must be adjusted in such a way,
that the picture does not shift if the continuous control "Y AMPL." is
turned (see section V.F.I).
- If knob "X AMPL." is in position "0.3 V/div.", knob "DC-Balance"
of the X amplifier (accessible on the right-hand side of the apparatus)
must be adjusted in such a way, that the light spot on the screen no
longer shifts if the continuous control is turned (see section V.G. I).
With cathode ray tubes, astigmatism may arise. Then the light spot on
the screen is not round. This can be corrected by means of potentio-
meter "ASTIGM.", accessible on the left-hand side of the apparatus.
B. DISPLAYING WAVEFORMS
1. Time base internally triggered
- Adjust as described under "Preliminary setting" (page 14).
Turn knob "STAB.*' anti-clockwise, until the time base line just dis-
appears.
- Apply a voltage to the d.c. or a.c. input of the Y amplifier.
Turn knob "STAB." until a stable picture is obtained.
- Place knobs "Y AMPL." and "NV* in the required position.
Note; If no triggering occurs at minimum setting (0.5 div.), potentio-
meter "LEVEL" (R513, in the right-hand side wall) must be adjusted
according to section V.H.I.
2. Time base externally triggered
- Adjust as described under "Preliminary setting" (page 14).
Turn knob "STAB." anti-clockwise until the time base line just dis-
appears.
- Apply a voltage to the d.c. or a.c. input of the Y amplifier.
- Apply an external trigger voltage to socket "EXT.TRIGG." on the
right-hand side of the apparatus (if the picture must be stationary, this
voltage must be derived from the voltage from which the Y signal also
originates).
- Place knobs "Y AMPL." and "N\ at the required position.
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