Several commonly used instrument for timing gps time mode
Keywords: the GPS timing device, gps time service
gps timing is widely used for range, weapons systems, hospitals, electricity, finance and other industries. This article will discuss the way we gps timing device commonly used several pairs.
gps timing device is received by the satellite antenna and the host of two parts, which can be divided into a host device timing the standard time signal reception means, holding means and the time time-frequency signal generating unit, which in practical applications is to put a few units are integrated on one device.
gps timing analyzer to provide users with accurate time and frequency signals, ensure that the time of the whole system is highly accurate uniform. gps timing device timing methods are commonly used when timing NTP, IRIG-B code, IEEE588 other time synchronization mode, wherein the chassis has a type, card type, and other modules.
Timing device obtained by receiving the satellite signals or various reference time outside the standard time information signal, synchronize the local clock, and using the time base within the holder, the external output NTP, PTP, B (DC) time signal and the like. Here we a brief introduction of the three commonly used timing mode.
When NTP network time service, commonly used network devices such as computers, servers, network cameras are all applicable NTP time service. Timing accuracy can reach ms time level synchronization accuracy. ntp protocol uses a client / server mode of operation, the server receives a signal Beidou or use the built-in atomic clock as a time reference correction Beidou system, according to the set client access to the server at regular intervals to obtain accurate time information and adjust their system clock to synchronize their time.
Ptp need hardware support when granted, is usually used together with the master and slave. Continue to exchange messages, and the master node from the node synchronization time, thereby adjusting the calibration time from the node.
In addition to the equipment chassis PTP master clock from the outside, often relatively small in an actual use environment of the equipment size requirements, and integration units of clock module 1588, various 1588ptp case optionally purchasing cards, compact, cost-effective high , do call the shots from can be used. For example, recommendations on the use SYN2407C timing module type with SYN2306C receivers simultaneously, otherwise the late commissioning is too much trouble.
B refers to code decoding apparatus which equipment receives IRIG-B (DC) / IRIG-B (AC) signal and demodulates time information, and generates the serial signal 1pps second synchronizing pulse signal. In this manner when a high timing accuracy, a transmission error is small.
Code generating apparatus B refers to paragraph gps satellite signal receiving device or receiving time information and the serial signal B codes 1pps Equipment (board or chassis) for time synchronization, generates one or more channels IRIG-B (DC) or IRIG -B (AC) for the internal clock signal code provided by the client system B code timing. Portable chassis, standard type 1U chassis boards and the like for the user to select modules to meet different application scenarios.
This article belongs to all synchronized Xi'an, respect the original, non-wash draft, without authorization, shall not be reproduced, All Rights Reserved!