Year1
- 规格：
- 1U19英寸
- 型号：
- W9001
- 颜色：
- 黑色
1.
Overview of satellite clock source
(satellite clock synchronization system, time correction system, timing system)
Satellite clock source
is a kind of system that can be synchronized with Beidou /Reference standard multi-functional high-precision time and frequency synchronization equipment. The equipment adopts a fully modular and high-reliability redundant design, providing users with a variety of optional functional modules. It can meet various user needs through flexible and diverse configurations. It can be widely used in national defense scientific research, communications, electric power, and transportation. , radio and television and computer network time synchronization and other fields.
Satellite clock source
The source is traceable and synchronized to the Beidou satellite cesium atomic clock. The output frequency has almost no drift, so there is no need to send it to the higher-level metrology department for periodic calibration. The performance is close to the cesium clock, but far lower than that of the cesium clock. The price of the clock is very low, and there is no problem like the cesium clock that the cesium beam tube has a short life and needs to be replaced at a high cost. The product is very suitable for use in radar synchronization, seismic observation, mobile communications, power systems and other fields, and can provide ultra-high-precision time and frequency benchmarks for the system.
The device has an intelligent state switching function, which can intelligently determine the stability of the Beidou receiving system, and provides a variety of time reference configuration methods. It can set any Beidou reference source to be a high, medium or low-level reference source. When used as the main reference source When unstable or unavailable, it can automatically switch to the next-level backup system in cycles. If both systems are interfered with and unavailable, it can automatically switch to the punctual unit mode, tame the oscillator based on historical operating performance parameters, and continue to provide high reliability. Time and frequency reference information output. If the reference source returns to normal, the system will automatically switch to the normal reference source system according to the level, making the switch seamless.
2.
Functions of satellite clock source
The equipment adopts a fully modular design, plug and play, and can be configured flexibly by the receiver, Beidou receiver, and B code signal input , rubidium atomic clock, constant temperature crystal oscillator, redundant distribution switching unit, time code generation unit, frequency standard distribution unit, server, protocol, power supply, display unit and monitoring and management unit. Its functions mainly include:
. Receive, Beidou, B time code timing signals
. Can generate,,, B,,,, and other time and frequency signals
3. Support single, single Beidou, Dual, dual Beidou, /Beidou dual system satellite receiver configuration.
.The device adopts a fully modular plug-and-play structure design, supports hot-swappable boards, has flexible configuration and is easy to maintain. It provides convenience for the access of other signal reference sources (Gali satellite signals, upstream terrestrial link signals, time reference signals, etc.) in the future, and lays the foundation for the future construction of a three-network-in-one digital synchronization network. At the same time, it provides convenience for adding or changing the timing signal interface during future on-site renovation and expansion.
.The device not only achieves full board compatibility, but also provides rich signal interface resources and an open special interface design platform, with excellent compatibility capabilities. The device can provide multi-channel pulse signals (,,,, event, empty contact, differential,, active, optical), B signal (,,, optical), signal (active, passive), time message (RR/, Optical),,/network time signals can meet the time synchronization interface requirements of different equipment in power plants/substations.
3.
Signal output of satellite clock source
The device adopts a plug-in card structure, and the number and type of signal output interfaces can be realized by adding corresponding plug-in cards. A maximum of signal output cards can be inserted.
Serial number
Card name
Card timing signal
Null contact pulse signal output card
Each block can output a null contact pulse signal. Set to hour pulse, minute pulse, second pulse, event as needed.
Differential pulse signal output card
Each block can output a differential pulse (i.e. R-level pulse) signal, which can be set to hour pulse, minute pulse, second pulse, or event as needed.
Pulse signal output card
Each block can output a pulse signal at the circuit level, which can be set as hour pulse, minute pulse, second pulse, or event as needed.
Serial port signal output card
Each block outputs four serial port signals using the B-head wiring method. It can be set to R3 serial port information output and R/serial port information output as needed.
One serial port signal output card
Each block outputs one serial port signal through terminal wiring, and can be set to R3 serial port information output and R/serial port information output as needed.
B signal output card
Each block can output channel level B signals.
B signal output card
Each block can output R-level B signals.
B () signal output card
Each block can output a sinusoidal modulation () B signal with adjustable amplitude.
Signal output card (two lines)
Each block can output signals.
Signal output card (three-wire)
Each block can output signals.
Network timing signal output card
Each block can output a network timing signal.
Optical signal output card
Each optical signal output card directly outputs 3 optical signals (B code, pulse, time message). The optical signal format passes through the short circuit block on the printed board. accomplish.
Signal output card
Each block can output a network timing signal.
In addition, specific signal output cards can be designed according to user needs.
4. Technical parameters of
satellite clock source
. Frequency source
Output amplitude:
Accuracy: - (hours after power-on, locked state, hourly average accuracy)
Stability: ＜ -
＜ -
＜ -
＜ -
＜ -
＜-
＜ -/日(LOCK)
Phase noise@
@
@
Distortion: Harmonics
． , clock source, and source
Output impedance: ohms.
3. B time code (conforming to standards)
B ()
Output level:,
Synchronization accuracy: better than.
B ()
Level (-): .~
Modulation degree::
． Second pulse
Level: Level
Jitter:
Rising edge:
Output impedance: Ohm
Timing accuracy:.
． Network time synchronization interface: /adaptive network interface, time synchronization accuracy:
. Network signal output timing accuracy:
. Time code: year, month, day, hour, minute and second
. power supply:.
． Reliability index
Mean trouble-free working time:
Mean maintenance time: R
Shock and vibration requirements: Comply with the provisions of 3.. and 3.. of the "General Specification for Time System Equipment".
Salt spray and mold requirements: Comply with the provisions of 3.. and 3.. of the "General Specifications for Current Equipment".
Electromagnetic compatibility: Meet B’s requirements for time and frequency standards.
． Physical and environmental parameters
Standard size/rack chassis
Weight:
Power supply
Operating temperature: -℃～ ℃
Storage temperature: -℃～ ℃
Operating humidity: (no condensation)
Storage humidity: (no condensation)
Power consumption
Satellite clock source
Typical performance:
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