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4.4.2° COMMUNICATIONS TEST
The purpose of this test is to verify the-integrity of the Datascope Bus and the RS232
Channel. The user will be instructed to jumper the transmit and receive pins together
on the RS232 connector, and to disconnect any Datascope Bus cables. This will allow
both serial communication channels to. transmit data and receive back the data that is
sent.
・
M
1. Select COMMUNICATIONS
TEST from the Diagnostic Menu.
A set of instructions will be display on the LCD panel as shown in figure 4-7.
2. Disconnect the Datascope bus
ON THE AS232 CONNECTOR
3. Jump the transmit and receive
pins (pins 2 & 3}, on the RS232
connector, together.
.
4. Press the START key to run the
_
sommunications test.
PRESS START TO RUN THE TEST WHEN READY
αι
Lr
FIGURE 4-7
" COMMUNICATIONS
TEST
The Datascope bus test involves
transmitting values from 0 to OFFh,
then reading back the received
data to verify that all data was cor-.
recily received.
o
The RS232 test involves transmitting the ASCII characters from space to lower case z,
then ver ifying that the received data is the 'same as what was transmitted.
In both tests, if the data i is received incorrectly or if not enough data is received the
test will fail. The RS232 test will fail if the transmit and receive pins are not jumped to-
gether.
The test results will be displayed on the LCD panel as shown in figure 4-8.
'5. lf the START key is pressed
again, the tests are performed
again. If the HOLD key is pressed,
DATASCOPE BUS TEST
PASSED/FAILED
the test ends and the main Diag-
.
.
=
Е
nostic Menu displays on the LCD
RS232 CHANNEL TEST
PASSED/FAILED
panel.
。
PRESS START TO REPEAT TEST_
6. FOR REV "F" AND ABOVE
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