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6
Drift
500 uVlweek
Triggering of the time base
required picture height:
3 mm for frequencies up to 10 Mcls
10 mm for frequencies up to 30 Mcls
1 cm in position "ALIT.'
1 cm video sigral in positions "TV LINE'and "TV FRAME"
Mechanical data
width
15
cm
depth
27.5 cm (including knobs and plug)
height
17.5 cm
weight
2
kg
Accessories
Manual
Optional accessories
measuring probe PM 933I A/lO
input impedance 10 Mo / / 8 pF
attenuation I : 10, tolerance + 3qo
maximum permissible voltage 1000 V peak
Description oÍ Íhe block diagram
The input circuit includes an "AC-DC" switch, a step
L.F. amplifier, is conveÍed into a square-wave vo]-
attenuator ("mVlcm - Y /cm") and a push-button
tage by a mechanical chopper.
"CHECK ZERO".
This square-wave voltage is amplified in an a.c.
coupled amplifier and after that detected. The output
The step attenuator is connected, via a cathode follo-
signal of the detector is applied to the d.c. coupled
wer stage, to trilo parallel connected amplifierg an
L.F. amplifier, with the result that drift in this am-
a.c. coupled H.F. amplifier and a d.c. coupled L.F.
plifier is heavily fed back.
amplifier. The output voltages are applied to an out-
The output amplifier contains the continuous gain
put amplifier via a cross over filter.
control, the "SHIFT" control and a screwdriver ad-
The input signal of the output amplifier is compared,
justment "GAIN ADJ.".
via an attenuator, with the signal on the input of
The output voltage of the output amplifier is applied
\/
the cathode follower stage.
to the vertical amplifier and the trigger preamplifier,
The difference voltage, due to drift in the d.c. coupled
via the Y-plug.
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