Chapter 2. Installation
2-2
ESU LT User Manual
61200410L1-1
Power Connection
Power is supplied to the ESU LT through an IEC-type power
connector on the rear of the unit.
Power Up Testing and Initialization
When shipped from the factory, the ESU LT is set to factory
default conditions. At the first application of power, the unit
automatically executes self-tests followed by an initializatio
sequence which sets up the unit. The following chart explains
how Self-tests work.
Power to the ESU LT must be from a grounded 90-240 VAC, 50/60 Hz
power source.
When
Then
A power-up or com-
manded self-test oc-
curs
The LCD displays
ADTRAN ESU LT INITIAL-
IZING
and the LEDs illuminate sequentially.
The self-test is com-
pleted with no failures
detected
The LCD momentarily displays
ALL TESTS
PASSED
.
A failure is detected
It is displayed in the LCD window.
The automatic self-test consists of the fol-
lowing tests:
Board level tests
Random access memory (RAM) tests; eras-
able programmable read only memory
(EPROM) checksum.
On-board data path. Sending a known test
pattern through an on-board loop.
Unit level tests
Front panel LED verification.
Phase lock loop verify.
Содержание 200410L1
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Страница 18: ...List of Tables xviii ESU LT User Manual 61200410L1 1 ...
Страница 28: ...Chapter 1 Introduction 1 10 ESULT User Manual 61200410L1 1 ...
Страница 44: ...Chapter 4 Status Menu 4 6 ESULT User Manual 61200410L1 1 ...
Страница 56: ...Chapter 5 Configuration Menu 5 12 ESU LT User Manual 61200410L1 1 ...
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Страница 90: ...Index Index 6 ESU LT User Manual 61200410L1 1 ...
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