CenterClick NTP Series Documentation - LEDs
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LEDs
The front panel LEDs can be in one of 3 states:
off
blink
on
| LED | Meaning |
|---|---|
| PPS | The GPS hasn't established a fix with satellites Each off-to-on transition is the precise start of a second
|
| NTP | No GPS sync Holdover, high jitter, or using backup NTP server Synchronized
|
| SYS | Just after power-up or shutdown/off System booting, bad power input, or no network Power and network good
|
| PWR | No power (all) or shutdown (NTP220/270/320/370/390 only) Powered on
|
| Ethernet Port |  Booted and Ethernet link up Rx/Tx packets |
