Philips PM3208 - 5.3.28 Horizontal Bandwidth; 5.3.29 Z Input; 5.3.30 MTB Deflection Coefficients

5.3.28
5.3.29
5.3.30
5 PERFORMANCE CHECK AND ADJUSTMENT PROCEDURE
Horizontal bandwidth
TEST EQUIPMENT
SETTING
REQUIREMENTS
ADJUSTMENT
Z input
TEST EQUIPMENT
SETTING
REQUIREMENTS
ADJUSTMENT
Constant amplitude sine-wave generator
Channel A AMPL/DIV - 0,1 V
Channel A coupling - DC
Vertical mode - B
Trigger coupling - DC
Apply a 50 kHz reference sine-wave signal to channel A and
set the amplitude at exactly 6 divisions.
Check that the trace amplitude is = 4,2 div at 1 MHz.
NO
Function generator
Vertical mode - A
Channel A coupling - GND
Horizontal mode - MTB
MTB TIME/DIV - 0,5 ms
Triggering - AUTO
Adjust for a line with normal brightness.
Apply
a
1
kHz
square-wave
signal
with
zero
level
of
0
V
and
positive
level
of
3
V
to
the
Z
input
at
the
rear
side
of
the
instrument.
Note
that
parts
of
the
time-base
are
blanked.
Turn
the
MTB
VAR
knob
if
necessary.
NO
MTB deflection coefficients
TEST EQUIPMENT
SETTING
ADJUSTMENT
SETTING
ADJUSTMENT
Time-marker generator
Vertical mode -A
MTB TIME/DIV - 1 ms
Apply a 1 ms marker pulse to channel A.
Adjust
VR612
("A-1ms"
-
HOR
PCB)
for
coincidence
of
the
marker
pulses
and
the
vertical
graticule
lines.
MTB TIME/DIV - 1 us
Apply a 1 ws marker pulse to channel A.
Adjust
VR613
("A-14s"
-
HOR
PCB)
for
coincidence
of
the
marker
pulses
and
the
vertical
graticule
lines.
5.3 PERFORMANCE CHECK AND ADJUSTMENT PROG EDURE