Horizontal Deflection; Main Time Base; Delay Time Base - Philips PM3055 Service Manual

2-6
CHARACTERISTICS
SPECIFICATION
ADDITIONAL INFORMATION
2.3 HORIZONTAL DEFLECTION OR
X AXIS
*
Horizontal dis-
MTB, MTBI,
play modes
ALT.TB, DTB
X-DEFL
2.3.1 Main Time Base
(MTB)
1, 2,
5
sequence (magn.off)
Measured
at -4.
.
.+4 div.
from
screen centre.
shifted over screen
centre
* Time coeff.
Error limit
0
,
5
sec
, , ,
50
ns
< 3%
*
Horizontal
posi*
tion range
Start of sweep and
10th div. must
be
*
Variable control
1
:
>
2,5
ratio
*
Time Base mag- Expansion *10
nifier
Error
limit
<
4%
*
Horizontal mag-
<
2,5
sd
nifier balance
* 10
>
*
1
*
Hold-Off
Minimum
to
maxi-
mum hold-off
time
1
:
> 10
ratio
2.3.2
Delay Time Base
(DTB)
*
Time coeff,
I
ms
.
, ,
50 ns
Error limit
*
Horizontal posi-
t
ion range
* Time Base
Mag-
nifier
Not valid in X-def lection.
Measured
at
+4...-4
div. from
screen centre.
Excluding
first
50 ns and
last 50 ns.
Shift start of sweep
in * 10
in
mid-screen position, then
switch
to
*
1
.
Minimum hold
off time
is
rela-
ted
to time base setting.
Sequence
1,
2,
5.
See MTB
See MTB
See MTB