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8-3
Self Tests
The communication unit and the terminal unit are equipped with self
tests which check them for proper operation.
Self test at power application (communication
unit)
The communication unit performs the following tests when it is turned
on:
a) ROM sum test
b) RAM read and write test
c) DP RAM read and write test
d) EEPROM sum test
e) VITERBI decoder test
If the unit finds no fault it goes into normal operation.
Testing the communication unit through the
keyboard
This test can only be initiated from the main DTE. The communica-
tion unit must be idle.
1. Press [F7] to display the Options menu.
2. Press [6] to display the Test menu.
3. Press [3]. The Communication Unit (self test) screen appears.
Figure 8-1 Communication unit screen
4. Press [Enter] to start the test.
The message “Now Communication Unit-testing” appears in
blinking reverse video during testing.