Vector 4 - Page 159

VECTOR GRAPHIC, INC.
To test specifiec ports, enter the command PORTEST DP SP <R> [RETURN]
The screen will clear and display:
VECTOR SERIAL PORT TEST
Vs. 1.x
Type
[RETURN]
when
loopback
plug
is
installed:
When
the
loopback
plug
enabling
the
port
test
is
in
place
in
the
desired
RS-232
socket,
press
[RETURN].
The
screen
will
clear
and
display:
Byte
sent:
##
Byte
rcvd:
##
The numbers of the bytes sent and received show all possible combinations of
codes. If the byte received does not match the byte sent, the program
detects an error and indicates on the screen that:
The loopback test has failed!
If all codes pass, the screen will display:
The loopback test has passed.
&%
In the example above, the ** indicates the location of display of signals which
were found to be stuck either high or low. Below this, the sereen will also
indicate the baud rate.
4.0 Keyboard Test
4.5.1 Purpose Of Test
This program alllows the technician to determine or test the value generated
by each key in each level of the keyboard. There are four levels to which
the keyboard can be selected:
CTRL/SHIFT
CTRL
SHIFT
UNSHIFT
II 4-4 7200-0001 09-01-82