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8
B
POSITION
(R5, R10, RI S, R20)
TRIGG. A, B, C, D
(SK 17)
CHOPPED-ALTERNATE
(SK 18)
4C
DC
• CHECK =Z RO
CO
DO
Vj cm
At[enuator
DC BAL GAIN
0
0
With this knob, the trace can be shifted in Y-direction.
The working-direction of this POSITION-control depends on the position of the
polarity switch.
With this push-button switch the triggersignal can be taken from channel
A, B, C or D.
Moreover it is possible to suppress the display of the triggering signal by
positioning the relevant INV-OFF-NORM selector to OFF.
This push-button switch allows two modes of operation, viz.
— CHOPPED.
The signals of each channel are displayed in the sequence A, B C and D
for 500 ns. Channels out of operation are skipped.
— ALTERNATE.
The signals of each channel are displayed successively in the sequence
A, B, C and D while channels out of operation are skipped.
Preampl ifier
INV
OFF
NORM.
DC BA O L GR OIN
B '~
TRIGG.
v~pm
Attenualor
AC
9CHECK ZERO
DC
V/cm
Attenuator
C
D
T
Pre-amplifier
INv
OAF
NORM.
V -plug
I
I
B lanking
y
ALTERNATE CHOPPED
Pulse g nerator
R ng
counter
Elec[ronlc switch
Final stage
V-amplifier
Alternate p Ise from time base
Trigger amplifier
Trigger empllfier
Pre-amps Iffier
DC BAL GAIN
AC
CHECK ZERO
DC
Fig. 2. Block-diagram
Pre-ampl Iffier
NORM.
OFF
INV
0
0
DC BAL GAIN
NORM.
OFF
INV.
PEM 3529
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