Philips PM32671 Service Manual page 80

i
ADJUSTMENT ADJUSTING
ELEMENT
Square-wave response C895 ((2896)
trigger view via channel
Square-wave response
trigger view via external
trig. input
TRIGGERING
Trigger symmetry
Trigger sensitivity R388
Trigger balance channel R959
A, B and EXT R962
Com posi balance R964
t e
R841
Trigger view balance
Trigger balance R887
DTB via A and B
R889
ADJUSTING RESULT
The distances between the trigger points
and the top respectively the bottom of
the sine-wave signal must be equal.
Push and pull S8; trace must be
triggered a t trace height of 0.4 div.
Trace in vertical centre
Trace in the vertical centre
Trace in the vertical centre
Starting point of trace does not shift
when switching t o DC trigger coupling
Trace in the vertical centre
Start of trace on the vertical centre line
Start of trace on the vertical centre line
RECOMMENDED INSTRUMENT CHAPTER
AND INPUT SIGNALS
Square-wave function generator, 5.5.5.6.
frequency 1 MHz/rise-time Ins,
6 div. deflection.
Square-wave function generator,
5.5.5.6.
frequency IOkHz, amplitude 2V.
Square-wave calibration generator,
frequency 1 MHz, amplitude 2V,
rise-time 1 ns.
Sine-wave signal, IOkHz, ampl. 0.8V. 5.5.6.1.
Sine-wave signal, IOkHz, ampl. 5.5.6.2.
5.5.6.3.
5.5.6.3.
5.5.6.4.
Sine-wave signal, 1 OkHz,
ampl. 0.8V
5.5.6.5.
Sine-wave signal, 10kHz 5.5.6.6.
Sine-wave signal, 10kHz 5.5.6.6.
5.2.
5.3.
5.2.
5.1.
5.2.
5.2.
5.2.
5.2.
5.2.
5.2.