Square Wave Response Of The X Amplifier - Philips GM 5605 Manual

Checking and adjusting 43
Position SK4 Voltage on BU4 Picture width
.03 V
p
_p/div.
.1 Vp-
p
/div.
-3 V
p
_
p
/div.
I V
p
_
p
/div.
3 Vp-
p
/div.
10 V
p
_p/div.
30 V
p
_
p
/div.
84.75 mV
r
.
m
.
s
.
0.2825 V
r
.
m
.
8
.
0.8475 V
r
.
m
.
s
.
2.825 V
r
.
m
.
s
.
8.475 V
r
.
m
.,.
28.26 V
r
.
m
.
s
.
84.75 V
r
.
m
.
s
.
7.8-8.2 divisions
6. Continuous attenuator
Turn R7 fully clockwise.
To BLJ4 apply a sinewave voltage of a frequency of 2 kc/s and an
amplitude such that the picture height is 3.5 divisions.
Turn R7 fully anti-clockwise.
- Now the picture width must be between 0.7 and 1 division.
7. Square wave response
Turn SK4 and R7 fully clockwise.
- Apply a square wave voltage to BU4 of a frequency of 2 kc/s. The
picture width must be approximately 8 divisions.
The square wave response must at least be in accordance with Fig. 19.
E113
Fig. 19. Square wave response of the X amplifier