Left-Hand View - Philips Pm 3342 Manual

28
2700 St
1 WATT
s%
TO BE ADDED
Fig. 7. Tz7-S pulser
which is controlled with the aid of the calibration volt-
age of the basic oscilloscope; the output voltage of the
pulser can be adjusted to the required value by means
of an attenuator. If a Tektronix TU-5 Pulser (cat. nr.
015-0038-00) is used a 2700 S2 resistor (.1 Watt, 5%)
must be added as shown at Fig. 7.
— Set the knobs of the basic oscilloscope to the follow-
ing positions:
"TIME/cm": ".OS µsec./cm"
"MAGNIFIER": "x 5".
C 318
Fig. 8. Left-hand view
1. Channel A
— Set the knobs mentioned below to the following
positions:
"V/cm" (SK4) to ".O1 ".
"V/cm" (R3) to "CAL."
"MODE" (SKS) and "TRIGG." (SK6) to "A".
Apply a 40 mV square-wave with a rise time of
~ 25 nsec. to BU1.
Adjust the frequency to 200 Hz and the timebase to
2 msec/cm.
— Select C217 and R263 so that optimum squarewave
display is obtained.
Increase the frequency to 10 kHz and the timebase
to 50 µsec./cm.
Select C215 and R255 so that optimum squarewave
display is obtained.
Increase the frequency to 100 kHz and the timebase
to 2 µsec./cm.
Select C211 and R235 so that optimum squarewave
display is obtained.
Increase the frequency to 1 MHz and the timebase
to .5 µsec./cm.
— Select C422 and R413 so that optimum squarewave
display is obtained.
czs ac~2s
SQUARE
WAVE
RESPONSE
IN PUT
CAPACITANCE