What is a 1PPS signal?
A pulse per second (PPS or 1PPS) is an electrical signal that has a width of less than one second and a sharply rising or abruptly falling edge that accurately repeats once per second. PPS signals are output by radio beacons, frequency standards, other types of precision oscillators and some GPS receivers.
What is PTP in LTE?
The Precision Time Protocol (PTP) is a protocol used to synchronize clocks throughout a computer network. On a local area network, it achieves clock accuracy in the sub-microsecond range, making it suitable for measurement and control systems.
What is PTP ToD?
PTP IEEE-1588v2 Slave Clock for ToD (Time of Day) and Frequency Synchronization.
What is the purpose of 1PPS?
The 1PPS signal is used for synchronization purposes. Suppose you have two devices located far away from each other and you want to generate clock pulses in both devices which start at exactly the same time.
What is the frequency of 1PPS?
The SecureSync base model includes one 1PPS output and one 10 MHz output. Additional 1PPS and frequency outputs are available with option cards.
Is PPS the same as Hz?
PRF has units of time-1 and is commonly expressed in Hz (1 Hz = 1/s) or as pulses per second (pps). PRF is the number of pulses transmitted per second and is equal to the inverse of PRT. RF = radio frequency. RF has units of time-1 or Hz and is commonly expressed in GHz or MHz.
What is a PTP switch?
Ethernet Switches and Delays. Precision Time Protocol (PTP) is defined in IEEE 1588 as Precision Clock Synchronization for Networked Measurements and Control Systems, and was developed to synchronize the clocks in packet-based networks that include distributed device clocks of varying precision and stability.
What is PTP domain number?
Every PTP message contains a domain number. A PTP instance is configured to work in one, and only one, domain. It is required to ignore messages with any other domain number. The point of this complication is to allow different independent timing systems to inhabit the same network without confusing each other.
What is PTP and SyncE?
PTP provides time-of-day information and phase (the second tick), and SyncE provides highly stable frequency synchronization. SyncE can also be used without enabling PTP, and in this case only the clock frequency is synchronized to the reference.
How long is 60Hz cycle?
approximately 16.6 milliseconds
The time between two identical points on a sine wave is called the period, and at a frequency of 60Hz (60 cycles per second) there will be a period of approximately 16.6 milliseconds, as shown in the diagram.
How is PTP used in a local area network?
PTP can provide sub-microsecond synchronization under ideal conditions. PTP supports a number of network technologies, including Ethernet, and is primarily intended to be used on dedicated Local Area Networks (LANs).
What is the purpose of the PTP protocol?
PTP is a protocol developed by the IEEE that enables the accurate synchronization of a set of peer clocks. It is intended to provide much more accurate synchronization than is normally achieved with the Network Time Protocol (NTP). PTP can provide sub-microsecond synchronization under ideal conditions.
How is NTP used in a wide area network?
NTP uses a hierarchy of clocks to provide clock synchronization to about 1 millisecond over a typical Local Area Network (LAN). NTP can also be used over Wide Area Networks, including the public Internet, but with lower accuracy. Many NTP implementations