* An NTP server with GPS accuracy for digital video:
TIMENET provides a low-cost solution to the problem of providing accurate reference time signals for CCTV recording equipment.
CCTV and digital video recorder (DVR) installations require accurate reference time signals for synchronisation of system clocks to ensure that they are always set at the precisely correct time. It is crucial that all recordings are accurately time-stamped, especially for evidential purposes. Many DVR products, especially those which are PC-based, have inaccurate internal clocks which drift by many seconds per week. Considering that DVR systems may be left unattended for months on end, it is easy to see that the time settings can end up being in error by many minutes.
The traditional solution to providing an accurate reference time has been to use an atomic clock radio receiver or GPS sensor linked to an expensive rack-mounted master clock server, typically with serial-only output. Network output versions tend to be even more expensive. For this reason, master reference clocks are normally only used in very high-end installations such as city centres, airports and prisons. TIMENET integrates the GPS receiver and master NTP clock server into a single device which can be directly connected to the network. TIMENET is extremely compact, can be wall-mounted, uses very little power and is less than half the cost of competing solutions.
Accurate universal atomic clock reference
Supports all NTP compatible devices
Ideal for CCTV and DVR applications
Far lower cost than competing products
Ideal for closed or secure networks
Direct network interface for remote siting
Simple setup - One IP address
Automatic GPS lock and time sync
- Extremely compact design
- Indoor location (antenna on a window)
- Wall mounting
- Integral watchdog for long-term reliable operation
- Robust, self contained unit
- Wide operating temperature range
- Very low power use
* TIMENET installation and setup:
TIMENET is then connected to the network through its RJ45 connector directly to the CCTV/DVR network using a standard CAT5 cable (up to 100m long). The TIMENET setup program is run on any Windows PC, and the only parameter to set is the desired IP address of the TIMENET device. This completes the time server installation.
Any DVR or other NTP-compatible network devices can now be programmed to get their NTP time signals from the IP address of the TIMENET server.
The time server unit is very simple to install and set up. The GPS antenna is included with the TIMENET product. The antenna itself is provided with a self-adhesive surface which can be affixed to any window which has a view of some sky (to pick up the GPS satellite transmissions). The TIMENET unit can be positioned anywhere within the 3m reach of the antenna lead, and may be conveniently wall-mounted with the integral brackets supplied.
* About UTC Time:
Universal co-ordinated time is an official world-wide atomic clock standard for time, agreed by national standards around the world. UTC time copes with variations in the earth's rotation by the introduction of leap-seconds at pre-defined intervals. GPS time references incorporate this automatically. Therefore TIMENET will continuously provide an accurate UTC clock reference automatically.
* About NTP:
NTP stands for Network Time Protocol and is a universal standard for time synchronisation of computers or other devices on a network. TIMENET is NTP-compatible and acts as a time server for any NTP-enabled client.
* About GPS:
GPS is a global satellite system used primarily for position location, using very accurate atomic clock references. GPS signals are far less prone to interference than traditional national radio clock signals. Thus TIMENET is a universal solution which can be used anywhere in the world.
* About Time Zone:
UTC is effectively a GMT reference time and TIMENET provides this via NTP as a universal reference. It is the task of the network client (i.e. DVR or other client device) to look after the local time zone setting for the country or zone location, including any local or national variations to daylight savings time or equivalent.
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