HP 8340b - Page 316

5.
On the
oscilloscope
CRT
observe
a
positive
going TTL
pulse
occuring once
every
sweep.
6.
Connect
the
oscilloscope
probe
to
pin
10
of
the
8410
INTERFACE
connector
Observe
the
refer¬
ence
line
trace on
the
CRT.
7.
On
the
controller,
enter
the following
command:
OUTPUT
719;
"IM,
2,
2.0E10,
4.0E10,
2.0E10,
4,
4.5E07,
0,
0.5,
0, 2,
0"
8.
On the
oscilloscope
CRT
observe
a
positive
going TTL
pulse
occuring
once
every
sweep.
9.
Connect
the
oscilloscope
probe
to
pin
17
of
the
8410
INTERFACE
connector.
Observe
the
refer¬
ence
line
trace
on
the
CRT.
10.
On the
controller, enter
the
following
command:
OUTPUT
719;
"IM,
2.
2.0E10,
4.0E10,
2.0E10.
4,
4.5E07.
0, 0.5,
0, 4,
0"
11
On the
oscilloscope
CRT
observe
a
positive
going
TTL
pulse
occuring
once
every
sweep.
12. Connect
the
oscilloscope
probe
to
pin
4
of the
8410
INTERFACE
connector.
Observe
the
refer¬
ence
line
trace
on
the
CRT.
13.
On the
controller,
enter
the
following
command:
OUTPUT
719;
"«M,
2,
2.0E10,
4.0E10,
2.0E10,
4.
4.5E07.
0,
0.5,
0, 8,
0"
14.
On the
oscilloscope
CRT
observe
a
positive
going
TTL
pulse
occuring
once
every
sweep.
This
completes
the
troubleshooting
procedure
for these four data control
lines.
If
any
of the lines
fail
to
perform
as
indicated
in
the
procedure,
troubleshoot
the
A57
marker/bandcross
or
the
A60
pro¬
cessor
assemblies.
G-46b
Rear
Panel
Theory
of
Operation
Change
7
HP 8340B/41B