NEC NDA-24300 manual PLO Restore, Connected With Primary Oscillator M-OSC External Clock

Models: NDA-24300

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SYSTEM MESSAGES

1-W

PLO Restore

Default Alarm:

Default Grade:

Grade Modified:

Lamp Modified:

NON

3

 

 

 

 

 

 

This message displays when a failure such as internal clock down occurred to PLO is restored.

1: XXXX XX00 0000 0000 2: 0000 0000 0000 0000 3: 0000 0000 0000 0000

➁ ➂

4:0000 0000 0000 0000 5: 0000 0000 0000 0000 6: 0000 0000 0000 0000

7: 0000 0000 0000 0000 8: 0000 0000 0000 0000 9: 0000 0000 0000 0000

Restoration of PLO fault

b7

b0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current Status of PLO card

b7

b6

b5

b4

b3

b2

b1

b0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current Status of PLO card

b7

b4

 

 

b1

b0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

b0: 0/1 = PLO No. 0 system/PLO No. 1 system

b0:

0/1 = Clock is in STBY side/ACT side

 

b1:

0/1 = PLO synchronizing/PLO self running or drifting

b2:

0/1 = -/Input clock down

 

b3, b4: Route of input clock (see the table below)

 

 

 

 

 

 

b4

b3

Connected With Primary

 

Connected With

Oscillator (M-OSC)

 

External Clock

 

 

 

 

 

 

 

 

0

0

No. 0 M-OSC

 

Route 0

 

 

 

 

 

0

1

No. 1 M-OSC

 

Route 1

 

 

 

 

 

1

0

 

Route 2

 

 

 

 

 

 

 

 

Route 3

 

 

 

 

 

b5:

0/1 = -/PLO input all down

 

b6:

0/1 = -/PLO output down

 

b7:

0/1 = -/Drifting

 

b0:

0/1 = -/5msec clock down

 

b1:

0/1 = -/Frame Synchronization from SYNC card is down

b4:

0/1 = -/Internal OSC clock down

 

CHAPTER 3

NDA-24300

Page 68

Issue 1

Page 95
Image 95
NEC NDA-24300 manual PLO Restore, Connected With Primary Oscillator M-OSC External Clock