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User Manual Quad Port Network Time Server NTP-800 P/N 040600202 900000200 Revision A July 2019 PREPARED BY BRANDYWINE COMMUNICATIONS 1153 Warner Avenue Tustin CA. 92780 CAGE 03NF8 P/N 900000200 REV A...
Safety Warnings WARNING: The lightning flash with an arrowhead inside of an equilateral triangle is intended to alert the user to the presence of un-insulated “dangerous voltage” within the product’s enclosure. The “dangerous voltage” may be of sufficient magnitude to constitute a risk of electrical shock to people. WARNING: This unit contains dual power supplies.
Table of Contents Revision History ....................... 2 Safety Warnings ....................... 3 Quad Port Network Time Server (NTP-800) ..............7 1 System Overview ......................7 1.1 Introduction to the NTP800 Multiport Time Server ..........7 1.2 NTP-800 system overview ................... 7 1.3 Specifications (Basic Unit) ...................
The NTP800 provides frequency output of 1pps and 10MHz and time outputs of IRIG DCLS or AC (depending on model) and serial time of day in RS422 and RS232. Figure 1 - NTP-800 Block Diagram MANUAL P/N 900000200 REV A...
2 Setup Remove the NTP-800 from the shipping carton. The following items should be included in the shipment: 1x NTP-800 2x Power supply cables 1x CD-ROM containing User Manual and Utility Software 2.1 Installation 2.1.1 Site Preparation 2.1.1.1 Antenna To prepare the site for the NTP800 installation a suitable antenna location has to be found.
Original Manufacturer: General Devices Chassis Trak Type C300. 2.1.3 Power Insert the power cord of the NTP-800 into an electrical socket to power up the unit. If dual redundant power is required, connect both power sources to independent power sources 2.1.4...
3 Configuration Power on the NTP-800 by switching the rear Power Supply Module to the upwards “On” position. To view the IP address depress the reset button on the rear of the unit for a maximum of 5 seconds and release. The 4 IP addresses are then rolled across the display for 10s...
Table 1 - NTP-800 Status Screen Field Description Firmware Displays the name of the NTP-800’s firmware. Runtime The length of time that the NTP-800 has been powered on. Version Displays the current version of the NTP-800’s firmware Date Displays the current date and time of day.
Once connected, the NTP800 web page interface will show the status of the system. 3.1.1 Network Configuration Use the network button on the right to select the network configuration page. This provides configuration for all the network settings, IP addresses, SNMP and service selection for the network ports.
3.1.2 NTP Configuration The supplied configuration will run the auto-arbitration mechanism between all the sources, GNSS, IRIG, Time of Day. With these initial settings and a GNSS antenna fitted the NTP800 will synchronize with GNSS and provide accurate time. Figure 4 NTP800 Configuration Screen When using peer to peer mode add the NTP peers’...
4 NTP800 Connections Figure 5 NTP800 Rear Panel 4.1 Input Signal Connections 4.1.1 GNSS Antenna Connections (GNSS Version) 4.1.1.1 Standard GPS Antenna for NTP800 P/N 040002XX The antenna is connected to the BNC port marked J17 GPS Antenna on the rear of the NTP800.
This is internally configured for either Modulated (IRIG B12X) or IRIG DCLS (IRIG B00X) Configuration for IRIG B12X Install JP23 Remove JP24 Configuration for IRIG B00X Install JP24 Remove JP23 4.1.3 ASCII Serial Time Of Day Input Time of day input is available on RJ45 connector J9 using the pin out shown below.
4.2 Output Connections 4.2.1 1 PPS output The 1 Pulse per second (1PPS) output is directly generated from the NTP800 internal oscillator. This 1PPS output is the on-time mark for the NTP800 and can be used to measure the accuracy of the NTP800. The1PPS output is connected to BNC connector J14.
4.2.2 IRIG Time Code Output The NTP800 generates IRIG B serial time code in either carrier modulated (AC) or Unmodulated (DCLS) format. The code format is selected on the Output Setting webpage (Figure 7) and output on connector J16 The hardware selection for modulated code or DCLS code formats is made by hardware link selection internally.
The output format is defined in the CONFIGURE->OUTPUTS webpage. The Baud Rate may be set with the selections shown in Figure 8. Figure 8 Baud Rate Selection for Time of Day Output Currently the NTP800 supports two different message formats: 4.2.3.1 NMEA0183 Message format GPZDA UTC day, month, and year, and local time zone offset...
4.2.3.2 TFS Message1 Field Meaning BCD centiseconds BCD seconds BCD minutes BCD hours BCD Day of Week (00 = Sunday) BCD Day of Month BCD Month BCD Year 0x00 = not leap year or 0x0F = leap year 0x00 = not Daylight Saving or 0x03 = Daylight Saving 0x00 = not synchronized or 0x3F =synchronized 0xFF 4.2.4...
Port characteristics are: Speed: 10/100/1000BaseT Electrical: RJ45 connection SFP: 1Gbps 4.4 Power Connection The AC power connector is suitable for 90-240V AC at 50/60Hz. Use the power cord appropriate to the country of use. A locking cord is available for applications where the power cord must remain securely attached when the power cord may experience tension –...
5 Web-based configuration The main configuration method is via the web interface. There are five main pages, two for status information and three for configuration. Access to any of these is via the navigation bar shown right. The three pages that configure the unit are •...
Figure 9 - NTP-800 System Screen This page sets security configuration for the following items: 5.1.1 Login credentials: Use these fields to set a username and password, and to control access to the NTP800. Enter the desired User name and Password and click on [Submit] If the [view passwords] box is checked, then the typed password is visible.
5.1.2 Remote Configuration Access The remote configuration access limits access of the web interface to a single IP address or a range of IP addresses. Be extremely careful when setting these values since it is possible to lock out all access. The address and the subnet mask MUST agree.
This page allows the configuration of each of the Ethernet ports. Select the port to configure from the drop down list box. The current settings for that port will be shown. Figure 10 - NTP-800 Network Screen The following settings are port specific:...
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HTTP Enable the web service on this interface. Note that it is not possible to disable the web interface from all ports with this setting. Support Allow for firmware upload with SCP protocol and remote access for factory support if there are any problems. Note that any changes must be submitted prior to changing the port selection otherwise they will be lost.
Figure 11 - NTP-800 Network Screen Showing Configuration Changes Note that if you change the IP address of the port through which the web page is being accessed the following will be shown, the link ‘Click here to redirect to STATUS PAGE’...
5.3.1 The default configure page is the NTP service and input source configuration page. Figure 13 - NTP-800 NTP Configuration Screen The top two lines configure TimeWall™ to control how to use the external reference sources. The user can either select any of the individual references or auto-arbitrate for TimeWall™...
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are not used or the monitoring of reference time is not taken into account. For these situations the auto-off mechanism will stop the NTP80 servicing NTP requests after a period specified, in seconds, from the time that synchronization is lost. Initially when this is enabled the holdover time will be set to 86400s, i.e.
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recommended that the signal and elevation masks are reduced to help improve GNSS satellite visibility. IRIG year For IRIG formats that do not contain a year, enter the current year. This will be provided by other reference sources if they are available. AC/DCLS Set to agree with the configuration of the unit for the IRIG input;...
when synchronizing to another NTP server will not be as good as running in holdover. If peer NTP servers are available in this configuration the AUTO-OFF will not function until all possible synchronization sources have failed. Mulitcast (or Broadcast) Address The NTP80 can be used as a broadcast NTP server.
Figure 14 - NTP-800 Status Screen The GNSS status shows position and the satellite status. The status will reflect the condition of the GNSS receiver with its pps and time. The status of the other reference sources, IRIG, Time of day and the frequency input are shown.
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The REFID indicates the reference ID in use on the NTP packets when the sync source is TimeWall™ and it wil reflect the current reference source in use, GPS, IRIG, ToD. If the source is an NTP peer REFID reflects the peer’s reference source. Offset, jitter, freq offset and stability indicate the performance of the NTP service.
5.5 Events Figure 15 - NTP-800 Event Log Screen The following lists all the events and their causes that can appear in the event log. They will cause an SNMP v1 trap to be sent to SNMP enabled ports. GPS events are also shown on the front panel of the NTP80, and these events will be shown in the relevant status field on the web status page.
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Antenna shorted There is a fault with the antenna connection. No antenna present No antenna is connected. Check antenna is connected. Not detected Initial start-up condition. All the above are decoded from the status value visible on the web page and relate to the GPS operating status.
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NTP SERVER Sync. Synchronized to source & serving time. System peer <ip address> Synchronization source found. When this is the GPS engine the IP address will be shown as 127.127.46.0 Acquiring sync Locking to time source No system peers no valid synchronization sources. Unit in holdover. NTP suspend NTP service suspended &...
5.6 Remote restart There is a mechanism to remotely reboot the NTP80. From the SYSTEM page notice the small ‘_’ on the top left side of the page. Pressing the reboot now button will cause the unit to do a complete restart. It will take approximately 1 minute to reboot.
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Clicking the link shown will take you back to the status page. The reboot is recorded in the event log. MANUAL P/N 900000200 REV A...
6 Working with the Clock Management System The status of the NTP800 will be shown on the status tab for the particular time server. There are five sources of possible alarm states. These relate to the status elements NTP overall state, GPS system state and the ETHx ifOperState for each port. For the NTP overall state the following will indicate a fault and turn the indicator red: not loaded NTP not loaded will be the case at start up, prior to first...
7 Understanding the Network Time Protocol. 7.1 Why use the Network Time Protocol Accurate Time has always been an important issue, especially in today’s world where computer systems are required to precisely time stamp events and occurrences. However, computers are notorious for poor time keeping because they use a basic watch crystal as their internal timebase.
7.2 Understanding NTP The client computer obtains the NTP protocol by requesting a NTP packet from the NTP Server. The Software that requests the packet handles reception, maintenance and distribution of the time on the computers where it is installed. All Time &...
7.3 NTP Hierarchical Structure The NTP protocol supports a hierarchical structure to ensure the availability of time, allowing the user to monitor their position in the hierarchy and thus the quality of the time service available. Figure 17 – Explanation of Hierarchical Stratum Structure The timeserver’s hierarchy is classed as Stratum, where a Stratum 1 time server that is directly synchronized to a traceable standard source such as UTC.
8 Frequently Asked Questions The following is a list of commonly asked questions by our customers. If the question that you wished to be answered is not in the list please contact us. Contact details are found at the end of this manual under Chapter 0. Can the NTP800 act as a stratum 1 server? Yes, Once the NTP800 has synchronized to a traceable GPS or Off-Air source it will automatically become a stratum 1 server.
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Satellites’ visibility has been reduced through new building structures, or the new installation of other equipment above the antenna. How many Clients may I connect to one NTP800 Time Server? The NTP800 can handle up to 512 packets per second, which equates to a theoretical 512 x 64 (32,000+) clients assuming standard NTP operation.
9 Maintenance 9.1 Preventive Maintenance The NTP-800 does not require scheduled preventative maintenance during normal operation. 9.2 Uploading New Firmware to the NTP-800 See the section titled “Updating Firmware and FPGA” for the instructions on how to do this. MANUAL P/N 900000200 REV A...
Troubleshooting The NTP-800 is capable of alarm and status reporting. These alarms are listed in Table 6 together with likely causes, and potential solutions. 10.1 Status LED meanings POWER LED on PSUs STATUS – On TIME VALID On=unit has obtained time from a time source since power on...
Support Information All Brandywine Communications products come with a one-year warranty. If the unit is still exhibiting problems not covered by the above troubleshooting guide, contact us for technical support at support@brandywinecomm.com or call us at 714-755-1050. If it becomes necessary to return the unit to the factory for repairs, call us at 714- 755-1050 extension 113 to arrange an RMA.
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