What is the PPL states of the clock?

Created: Sep 17, 2019 14:43:34Latest reply: Sep 17, 2019 14:58:26 83 1 0 0
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Hi,

When the BTS synchronizes the reference clock source, what are the phase-locked loop states of the clock?


  • x
  • convention:

Featured Answers
Neil_Tong
Admin Created Sep 17, 2019 14:58:26 Helpful(0) Helpful(0)

Hi friend,
The clock has four PLL(phase-locked loop) states: Free running, fast tracking, locked, and hold.
When the BTS is not configured with a reference source, the BTS is in the free-running state. After the BTS is configured with a reference source, the BTS will enter the fast-tracking state from the free-running mode. The two states change quickly, generally, which will be changed immediately after the reference source is set.

For the more details about PPL states, please refer to the 5.3 section of below link:
http://support.huawei.com/hedex/hdx.do?docid=SE0000749359&id=GEC03057_09_10079&text=Synchronization%2525252BFeature%2525252BParameter%2525252BDescription&lang=en
  • x
  • convention:

All Answers
Neil_Tong
Neil_Tong Admin Created Sep 17, 2019 14:58:26 Helpful(0) Helpful(0)

Hi friend,
The clock has four PLL(phase-locked loop) states: Free running, fast tracking, locked, and hold.
When the BTS is not configured with a reference source, the BTS is in the free-running state. After the BTS is configured with a reference source, the BTS will enter the fast-tracking state from the free-running mode. The two states change quickly, generally, which will be changed immediately after the reference source is set.

For the more details about PPL states, please refer to the 5.3 section of below link:
http://support.huawei.com/hedex/hdx.do?docid=SE0000749359&id=GEC03057_09_10079&text=Synchronization%2525252BFeature%2525252BParameter%2525252BDescription&lang=en
  • x
  • convention:

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