BRG Precision Products NTP100B User manual
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BRG NTP100B Time Server
Stratum 1 GPS Synchronized Time Server
USER MANUAL
BRG Precision Products
600 N. River Street
Derby, Kansas 67037
http://www.brgproducts.com
7/30/2020
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Table of Contents
1 Introduction ............................................................................................................................. 4
2 Installation ............................................................................................................................... 4
2.1 Location ............................................................................................................................... 4
2.2 Connections ......................................................................................................................... 5
2.2.1Antenna ............................................................................................................................. 5
2.2.2 Power ................................................................................................................................ 5
2.2.3 Network ............................................................................................................................. 5
2.2.4 Front Panel Display and Control ........................................................................................ 6
3 Configuration........................................................................................................................... 6
3.1 Web Page ............................................................................................................................ 6
3.2 Default IP address is 192.168.1.15 ...................................................................................... 6
3.2.1 Network Setup .................................................................................................................. 8
3.2.2 GPS Lock, Signal, and Current Time Information .............................................................. 9
3.2.3 Use DHCP ........................................................................................................................ 9
3.2.4 IPv4 Address ..................................................................................................................... 9
3.2.5 IPv6 Address ..................................................................................................................... 9
3.2.6 IPv6 Link Local .................................................................................................................. 9
3.2.7 IPv6 Temporary ................................................................................................................10
3.2.8 Mask HTTP access on Subnet .........................................................................................10
3.2.9 Mask NTP access on Subnet ...........................................................................................10
3.2.10 Netmask .........................................................................................................................10
3.2.11 Gateway .........................................................................................................................10
3.2.12 MAC ...............................................................................................................................10
3.2.13 Echo GPS Strings Checkbox ..........................................................................................10
3.2.14 Serial TTL Level Outputs Checkbox ...............................................................................11
3.2.15 Debug Output Checkbox ...............................................................................................11
3.2.16 Unit Name ......................................................................................................................11
3.2.17 Password .......................................................................................................................11
3.3 Display Configuration ..........................................................................................................11
4 Troubleshooting .....................................................................................................................14
4.1 GPS Lock ............................................................................................................................14
4.2 Finding the IP Address ........................................................................................................14
4.3 Resetting to Factory Defaults ..............................................................................................15
5 Specifications .........................................................................................................................15
5.1 Time Server Features and Specifications ............................................................................15
5.2 GPS Module Specifications .................................................................................................15
5.3 Antenna Specifications ........................................................................................................16
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6 Warranty Agreement ..............................................................................................................17
7 Payments and Returns ...........................................................................................................20
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1 Introduction
The BRG Network Time Server is a simple to use GPS based time server that will supply
accurate Stratum 1 time for all computers and time keeping devices on the network. The BRG
time server incorporates the proven TimeMachines NTP engine to provide accurate and reliable
time. By placing a time server on the local network, NTP time packets are provided, without
requiring systems to go to the Internet to obtain time synchronization. The system uses an active
GPS antenna to maintain the current time as broadcast by United States GPS satellites. With this
device installed on your local network, there is no longer the worry that if the Internet connection
goes down, time synchronization is lost across the network.
The rack mount device can be placed anywhere within the network layout. The built in high
sensitivity GPS receiver is able to lock on to multiple satellites, in some cases, from within many
buildings or from a window location. The dome outdoor antenna includes 25 feet of antenna
cable, plus another 100 foot extension cable for a total length of 125 feet. Additional cable may
be added as needed.
Setup and use of this time server is straightforward. Simply connect both the included power
supply and the GPS antenna to the base unit and then connect the base unit to the local network.
Go to a computer on the network and browse to the device at its default address to enter the
software setup within the control box. Set parameters to match your network and the system will
start to send out time packets to any device on the system that asks for an update from it.
Multiple servers may be setup to provide redundancy and more capacity.
When paired with our digital Power over Ethernet (PoE) clocks, synchronized time is assured no
matter the state of your network, or the state of the internet time server the clocks are pointed to.
Accuracy is also improved because the network delay of the internet is highly variable, while the
local LAN connection is likely sub-millisecond delay.
BRG NTP time servers are suited to any application where coordination of events at multiple
locations is required. Without coordinated network time, searching for problems across multiple
system logs becomes much more difficult. Education, industrial facilities, military installations,
public safety command rooms, government, broadcasting, and hospitals are all candidates
for synchronized time systems.
2 Installation
2.1 Location
To receive GPS signals, the Time Server's antenna must be located in a location where it can
“see” the sky. Both indoor and outdoor antennas are included. The GPS module itself is highly
sensitive and able to “see” the GPS satellite signals from within many structures. Multi-Story or
metal structures may block the GPS signals such that the antenna must be located elsewhere. In
these cases, the GPS antenna may be located in a window. The Time Server unit can be located
anywhere on the network. All that is required is power and a wired network connection. In the
worst case, an outdoor antenna may be required.
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2.2 Connections
Time Server Rear View
2.2.1Antenna
The outdoor dome GPS antenna is connected through the SMA connector on the rear of the Time
Server. The outdoor antenna uses an SMA to BNC adapter to match the outdoor antenna cable.
The antenna includes 25’ cable with a BNC connector. If the antenna cable is extended, the
cable connections must be located indoors or otherwise protected from the elements. The BNC
connectors are not waterproof. The swivel mount allows the antenna to be mounted in a variety
of locations. For best reception, mount the antenna in a location that has a wide view of the sky.
2.2.2 Power
A UL Listed 5 volt DC power supply is supplied with the unit. Connect one end to a standard
United States 110-120 Volt outlet and the barrel connector to the rear of the Time Server. The
time server will begin trying to find the GPS satellites. On power-up, synchronization to the GPS
satellites will take several minutes. No battery backup of position is provided to allow for a
warm start so the Time Server is always starting from scratch in determining its location to
achieve GPS lock. The time server maintains time during power loss, but the LED display will
blank and the NTP time server engine is shut down.
2.2.3 Network
Connect the 10/100 RJ45 port on the back of the Time Server to a network connection. Verify
that the network settings are correct for your system. See the configuration section of this manual
for more information on doing this.
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2.2.4 Front Panel Display and Control
The front panel of the Time Server includes an LED alphanumeric display and four control
buttons. When the time server is first powered on, hours, minutes and seconds will appear on the
display. A green “S” sync indicator will display when the time server is locked and sync’d to the
GPS time signal. If the GPS signal is lost, the “S” will turn off.
3 Configuration
3.1 Web Page
Default password is 'tmachine'
3.2 Default IP address is 192.168.1.15
All Time Server parameters are accessed on the configuration web page. The page can be
accessed by pointing any web browser at the IP address of the Time Server. The initial IP
address is 192.168.1.15 from the factory.
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Illustration 1: Password Page
Default password is 'tmachine'
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Illustration 2: Parameters Page
The time server must
3.2.1 Network Setup
By default the network parameters are setup to static address 192.168.1.15. The Time Server is
able to use DHCP, but the rest of the network will need to be able to automatically adjust to its
IP address should it change. This would involve setup with DHCP and DNS systems. Usually,
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static setup is recommended. Addresses in the Network section must be entered in IPv4, dotted
quad, format.
All of these parameters require a restart for changes to take effect.
3.2.2 GPS Lock, Signal, and Current Time Information
At the top of the Time Server Configuration page is status information about the software
version in the Time Server and from the GPS module in the Time Server. The Firmware Version
is displayed and should be known before calling for support. The “GPS:” label will state whether
the GPS is locked to satellite signals or not. A “LOCKED” status in green letters is required for
operation. The “Signal Strength” line will give the signal strength of the top three satellites being
received. The possible range is from 0 to 99dB SNR. The time server will use as many satellites
as it can receive for the greatest possible accuracy. The current time is also displayed at the top
of the web page. The time zone is determined automatically from the browser settings. The time
is updated when the page is loaded (and GPS is locked) and thereafter is dependent on the
system clock of the web browser. Over time this value will drift based on the characteristics of
the HW clock in the browser hardware. Refreshing the page will update the time.
3.2.3 Use DHCP
Checking this option will tell the Time Server to ignore the other IP address settings and request
an IP address from the network's DHCP server at startup.
3.2.4 IPv4 Address
If the DHCP option is not being used, then the IP address of the unit set to by entering a standard
IPv4 dotted quad in this field. 192.168.1.15 or 10.10.0.96 are examples of acceptable formats for
this field.
3.2.5 IPv6 Address
This is the 128 bit IPv6 address of the device either statically entered of determined by DHCP.
The first 64 bits indicate the network address and the last 64 bits are user defined for their
network. Please note that a user should still setup the device as initially using IPv4. They can
then set an IPv6 address and/or view the IPv6 temporary. The web page can be accessed using an
IPv4 and/or IPv6. The time server will respond to Ping, Ping6, rdate and rdate -6.
3.2.6 IPv6 Link Local
This address is only valid for communications within the network segment (link) and is required
for stateless address auto-configuration. Neighbor Discovery Protocol is part of the IPv6 protocol
and uses stateless address auto-configuration. This address begins with prefix fe80::/64. The last
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64-bits are based on the MAC address of the time server. This address is unique to each time
server and not modifiable.
3.2.7 IPv6 Temporary
This is a default address based on the network address and the MAC address. The time server
uses Neighbor Discovery Protocol to find the network address. The last 64-bits are based on the
time server’s MAC address. This address is unique to each time server and not modifiable. The
time server will default to this address to serve time if the IPv6 address has not been set,
otherwise the modifiable IPv6 address is used to serve time.
3.2.8 Mask HTTP access on Subnet
This checkbox will enable HTTP (web browser) access only on the time server’s configured
subnet. This has the effect that the time server will only respond to requests for the web page if
they come from the same subnet as the time server is configured on. This is a security feature to
limit the access to the configuration of the device only to the local subnet.
3.2.9 Mask NTP access on Subnet
This checkbox will enable NTP access only on the time server’s configured subnet. This allows
the time server to ignore requests for time from all devices that are not on the same subnet and
provides a measure of security and protection from denial of service attacks.
3.2.10 Netmask
The Netmask entry determines what addresses are on the local network and what addresses are
reached through the Gateway. Typical Netmasks are 255.255.0.0 or 255.255.255.0. Consult the
network administrator for more information on who this entry should be set.
3.2.11 Gateway
The Gateway IP address is used when a destination address is determined to not be on the local
network. Consult the network administrator for this setting.
3.2.12 MAC
This is an information only field and displays the MAC address of the Time Server.
3.2.13 Echo GPS Strings Checkbox
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