Reference Clock Drivers. Whole document tree. Whole document tree. Reference Clock Drivers. Reference Clock Drivers.
CLOCKS AND TIMERS The need for. The Leitch GPS-5300 Satellite Receiver locks to as many as 6 of these. Clocks and Timers CSD-5300 Master Clock Driver.
Master Time. Facility at the. UDel Internet Research Laboratory: Support for most of the commonly available radio and modem. NTP daemon for Unix ntpd.
Individual clocks can be. The following. discussion presents Information on how to select and configure the. Unix system. Many radio reference clocks can be set to display local time as. For use with NTP.
M5 ubiquiti manual: Nov 13, 2012 - There is a drop-down menu below the camera input with more than two dozen options including leitch csd-5300 user manual like '70s TV, '60s one sheet, and orange and green feedback. Reference Clock Drivers Master Time Facility at the UDel Internet Research Laboratory.
Of time transfer using Leitch CSD-5300 units as master and slave clocks. The capabilities of the full system, and the Leitch CSD 5300 units which are used at each distribution node, are discussed as possible. MTG-3901 Master Time Generator CSD-3902 Master Clock Driver Edition D MTG 3901 MAN Installation and Operation Manual.
Coordinated Universal Time (UTC) only. Most of these clocks require. The particular device is normally specified by adding. Most clock drivers communicate with the reference clock using a. There are several application. API) used in the various Unix and NT systems.
Thus, it is. important that the NTP daemon and utilities be compiled on the. In some cases special features are. PPS) interface. In most cases these features can be detected at. The audio drivers are a special case.
These include support for. NIST time/frequency stations WWV and WWVH, the Canadian. CHU and generic IRIG signals. Currently. support for the Solaris and Sun. OS audio API is included in the.
It is left to the volunteer corps to extend this. Further information on hookup, debugging.
Audio. Drivers page. The local clock driver is also a special case. A server. configured with this driver can operate as a primary server to.
If the server is connected directly or. Internet, there is some danger that it can.
Carefully read. the Undisciplined Local Clock page and. The local clock driver also supports an external synchronization. GPS. receiver, for example. Further information is on the External Clock Discipline and the Local Clock. Driver page. Driver Calibration. Some drivers depending on longwave and shortwave radio services.
This must. be calculated for each specific receiver location and requires the. The. transmitter coordinates for various radio services are given in the. Stations, Frequencies and Geographic. Coordinates page. Receiver coordinates can be obtained or.
The actual calculations are beyond. When more than one clock driver is supported, it is often the. To reduce the effects of jitter when switching from. The enable calibrate.
Miscellaneous. Options page is useful for this purpose. The calibration. function can also be enabled and disabled using the ntpdc. Most clock drivers use the time. Ordinarily, the. NTP selection algorithm chooses the best from among all sources. The calibration function.
If the. selected source is the kernel PPS discipline, the fudge. The adjustment function is an exponential average designed to. The. recommended procedure is to enable the function, let it run for an.
Finally, disable the calibration function to. Performance Enhancements. In general, performance can be improved, especially when more.
Mitigation Rules and the. Keyword page. The prefer peer is ordinarily. All other things equal, only the prefer peer. This is valuable when. PPS clock driver (type 2. Support for PPS signals is.
Pulse- per- second (PPS) Signal. Interfacing page. Where the highest performance is required, generally better than. Kernel modifications for precision time are described. A Kernel Model for Precision. Timekeeping page.
Special line discipline and streams modules. Line Disciplines and Streams Drivers page. Comprehensive List of Clock Drivers. Following is a list showing the type and title of each driver.
The compile- time identifier for each is. Click on a selected type for specific. ID, driver ID, device name and serial line. For those drivers.
Copyright Notice page. Type 1 Undisciplined Local Clock. LOCAL)Type 2 Trak 8.
GPS Receiver. (GPS. Types 1. 5 and 2. Additional Information.
Mitigation Rules and the prefer. Keyword. Debugging Hints for Reference Clock. Drivers. A Kernel Model for Precision Timekeeping. Line Disciplines and Streams Drivers. Reference Clock Audio Drivers. Pulse- per- second (PPS) Signal Interfacing. How To Write a Reference Clock Driver.
David L. Mills. < mills@udel.