Chapter 2. Installation
61200.129L1-1
TSU 120 User Manual
31
POWER UP TESTING AND INITIALIZATION
When shipped from the factory, the TSU 120 is set to
factory default conditions. At the first application of
power, the unit automatically executes a memory self
test. A full self test can be run from the front panel,
and a pass code and unit ID may be set using the UTIL
menu.
Self Test
Upon a power-up, the LCD displays Memory Test
Now Testing and the Test LEDs are illuminated.
When the self test is completed with no failures
detected, the OK LED lights up and the LCD momen-
tarily displays All Tests Passed. If a failure is detected
a list of failures is displayed in the LCD window. The
full self test procedure (invoked from the front panel
or T-Watch) consists of the following steps:
1.
Board level tests. Each of the TSU 120 board
contains an on-board processor which executes a
series of tests checking the circuitry on the board.
a. RAM tests; EPROM checksum
b. DS0 map tests
c. On-board data path. Sending a known test
pattern through an on-board loop.
2.
Unit level tests.
a.
Front panel LED verification
b. Phase locked loop verification
c.
Board-to-board interface test. A test pattern is
sent from the controller through a loopback on
all other boards and checked on the controller.
This verifies the data path, clocks, and control
signals.
Summary of Contents for TSU 120
Page 1: ...TSU 120 PART NUMBER 1200129L1 USER MANUAL 61200 129L1 1A July 1997...
Page 52: ...Chapter 2 Installation 38 TSU 120 User Manual 61200 129L1 1...
Page 132: ...Appendix C System Configuration Charts 118 TSU 120 User Manual 61200 129L1 1...
Page 138: ...Appendix D TSU 120 System Messages 124 TSU 120 User Manual 61200 129L1 1...
