Tektronix 494A Water Dispenser User Manual


 
Maintenance
-
494A/494Ap
Service
Vot.
i
Table
6-13
(cont)
Data
Bits
76543210
Description
C. Vldeo
Processor (7C)
011xxxxx
001xxxxx
1l1xxxxx
010xxxxx
D. Dlgital
Storage
o
o
o
a
a
t
t
a
o
I
o
I
o
a
o
o
o
o
I
o
o
o
o
o
o
o
o
a
o
I
o
o
a
e
t
I
o
o
o
o
o
e
o
a
xxx0000x
xxx0001x
xxx1001x
xxx1101x
xxx0011x
xxx1011x
xxx1111x
xxxxxxxl
xxxxxxx0
l xxxxxxx
0xxxxxxx
xlxxxxxx
xxlxxxxx
xxxlxxxx
xxxxlxxx
xxxx0xxx
xxxxxlxx
xxxxx0xx
xxxxxxlx
xxxxxx0x
xxxxxxxl
xxxxxxx0
Extended
Address
2-O
DB1-DB7
DBO
Out-of-band
clamp
-
ns
clamp
Out-of-band
clamp
- g;6rt
upper
5 div
Out-of-band
ctamp
-
66rO
lower
div
Out-of-band
clamp
- qlgmt
lower
5 div
Mdeo
filter off
Video
filter
30 kHz
Mdeo
filter
3 kHz
Video
filter
300 Hz
Video
filter
30 Hz
Mdeo
filter
3 Hz
Mdeo
filter
0.3 Hz
Base-line
leveling
on
Base-line
leveling
off
Horlzontal
Digital
Storage
Board
7B
Digital
Storage
Acquisition
Enable
Digital
Storage
Acquisition
Dis-
abl€
Extended
Address
2
Extended
Address
1
Extended
Address
0
B-SAVE
A on
B-SAVE
A otr
VIEW
B
on
VIEW
B off
VIEW
A on
VIEW
A
off
SAVE
A on
SAVE
A off
Subaddress
bits for
Port
7A
giv-
ing
subaddresses
Z-0.
Addressing
7A.6
transfers
the
bus
to
the Vertical
Digital
Storage
board.
7A.0
Secondary
Marker
position
bits
Secondary
Marker
trace
bit
Data
Bits
7654321
D.
Digital
Storage
(cont)
DB8, DBg
DB1
DBl-7
DBO
DB8_9
DB1
ADDRT-ADDRO
DB6
DB5
D84
ADDRg,
ADDRS
DB4-7
DBO-3
DBO-7
DBO
& DBl
Description
Horlzontal
Digital
Storage
Board
(cont)
7A.1
Secondary
Marker
position
bits
Secondary
Marker
trace
bit
7A.2
Primary
Marker
position
bits
Primary
Marker
trace bit
7A.3
Primary
Marker
position
bits
Primary
Marker
trace
bit
7A,.4
Digital
Storage
address
bits
7A.5
Transfers
the bus
to the Vertical
Digital
Storage board.
Determines
if
bus transfer
is for
a
single cycle
or
until
it is
returned
by
the
Vertical
Digital
Storage board.
Disable
Update Marker
Loading
ADDRT-o
reloads
th€
last
ADDR9.8
7A.7
Primary Marker
intensity
bits
Secondary
Marker
int€nsity
bits
FA
Digital Storage
position
bits
FB
Always low
to
indicate
that
it is
from the Horizontal
Digital
Storage board
Digital
Storage
position
bits
Table
S13
(cont)
6-58