Philips PM32671 Service Manual page 59

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STEP OBJECTIVE INPUT VOLTAGE
4.3.6. Input coupling Sine-wave signal 2kHz
offset to A input (B)
Common mode Sine-wave signal 2MHz
4.3.7.
rejection
input
Sine-wave signal 40MHz,
4.3.8. Dynamic range
Sine-wave signal 1 OOMHz,
Sine-wave signal 100MHz
4.3.9.
to A input
ampl. 160mV
SETTINGS
5 v
ov
1
+
- Depress 0 of S17 (S18)
DC
- Set the trace in the centre of the
screen R1 f t ( R 2 f t )
- Depress AC of S17 ( 9 8 )
-
Depress DC of S17 (S18)
- AMPLIDIV switches t o 20mV
-
Pull NII switch S5
-
Set the continuous controls for
minimum trace height difference
- Depress ADD of S1
-
Depress AC of S17 6 1 8 )
-
AMPLIDIV to 0.1V
- Shift trace with POSITION
control R l f t ( R 2 n )
- AMPLIDIV to 0.1V
- AMPLIDIV switches to 20mV
- Depress B of S1
Trace height 5 div., or -3% (+ 0.15 div.)
+
Trace height 2.5 div., or -3%
Signal is visible on the screen, centre of the
sine-wave is on the vertical centre of the
screen.
Signal is visible
Centre of the sine-wave is on DC offset level.
Rejection 40dB +trace height
0.08 div
24 div. trace height distortion-fre visible
on screen
8 div. trace height distortion-free visible
on screen.
Cross talk from A to B 0.1 div
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