Brandywine NTP-800 User manual

P/N 900000200 REV A
1
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
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Revision(History!
REVISION
DATE
COMMENTS
ECO NUMBER
A
INITIAL RELEASE

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MANUAL 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. Isolate BOTH power supplies from
power before removing the top cover.
CAUTION:
Observe all necessary precautions for handling electrostatic
discharge sensitive devices when handing component
modules. Improper handling will damage internal circuitry.

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MANUAL P/N 900000200 REV A
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) ................................................................................... 8!
1.3.1!Reference Inputs........................................................................................... 8!
1.3.2!Outputs.......................................................................................................... 8!
2!Setup .......................................................................................................................... 9!
2.1!Installation............................................................................................................ 9!
2.1.1!Site Preparation ............................................................................................ 9!
2.1.1.1!Antenna .................................................................................................. 9!
2.1.1.2!Power ..................................................................................................... 9!
2.1.1.3!Network .................................................................................................. 9!
2.1.1.4!Reference sources ............................................................................... 10!
2.1.2!Mounting ..................................................................................................... 10!
2.1.3!Power .......................................................................................................... 10!
2.1.4!Antenna....................................................................................................... 10!
2.1.5!Ethernet....................................................................................................... 10!
3!Configuration ............................................................................................................ 12!
3.1!Accessing the NTP-800 ..................................................................................... 12!
3.1.1!Network Configuration................................................................................. 14!
3.1.2!NTP Configuration....................................................................................... 15!
4!NTP800 Connections ............................................................................................... 16!
4.1!Input Signal Connections................................................................................... 16!
4.1.1!GNSS Antenna Connections (GNSS Version)............................................ 16!
4.1.1.1!Standard GPS Antenna for NTP800 P/N 040002XX............................ 16!
4.1.1.2!Long Reach GNSS Antenna for NTP800 P/N 040003XX .................... 16!
4.1.2!IRIG B Time Code input .............................................................................. 16!
4.1.3!ASCII Serial Time Of Day Input .................................................................. 17!
4.1.4!1 PPS input ................................................................................................. 17!
4.1.5!10MHz Input................................................................................................ 17!
4.2!Output Connections ........................................................................................... 18!
4.2.1!1 PPS output ............................................................................................... 18!
4.2.2!IRIG Time Code Output .............................................................................. 19!
4.2.3!Time of day output ...................................................................................... 19!
4.2.3.1!NMEA0183 Message format GPZDA ................................................... 20!
4.2.3.2!TFS Message1 ..................................................................................... 21!
4.2.4!10MHz Output ............................................................................................. 21!
4.3!Network Ports .................................................................................................... 21!
4.4!Power Connection ............................................................................................. 22!
4.5!Default Setting / IP address button .................................................................... 22!
5!Web-based configuration ......................................................................................... 23!

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5.1!System Security................................................................................................. 23!
5.1.1!Login credentials: ........................................................................................ 24!
5.1.2!Remote Configuration Access..................................................................... 25!
5.1.3!SNMP v3 credentials................................................................................... 25!
5.1.4!NTP authentication...................................................................................... 25!
5.2!Network Configuration ....................................................................................... 26!
5.3!Configure ........................................................................................................... 30!
5.3.1!NTP ............................................................................................................. 30!
5.3.2!Outputs........................................................................................................ 33!
5.4!Status................................................................................................................. 34!
5.5!Events................................................................................................................ 36!
5.6!Remote restart ................................................................................................... 39!
6!Working with the Clock Management System.......................................................... 41!
7!Understanding the Network Time Protocol............................................................... 42!
7.1!Why use the Network Time Protocol ................................................................. 42!
7.2!Understanding NTP ........................................................................................... 43!
7.3!NTP Hierarchical Structure ................................................................................ 44!
8!Frequently Asked Questions .................................................................................... 45!
9!Maintenance............................................................................................................. 47!
9.1!Preventive Maintenance .................................................................................... 47!
9.2!Uploading New Firmware to the NTP-800 ......................................................... 47!
10!Troubleshooting........................................................................................................ 48!
10.1!Status LED meanings ........................................................................................ 48!
11!Updating Firmware and FPGA ................................................................................. 48!
12!Support Information.................................................................................................. 49!
13!Front Panel Drawing................................................................................................. 50!
14!Rear Panel Drawings................................................................................................ 51!
15!Parts Lists................................................................................................................. 52!
Table Of Figures
Figure 1 - NTP-800 Block Diagram.................................................................................. 7!
Figure 2 - NTP-800 Status Screen................................................................................. 13!
Figure 3. NTP800 Network Settings ............................................................................. 14!
Figure 4 NTP800 Configuration Screen......................................................................... 15!
Figure 5 NTP800 Rear Panel......................................................................................... 16!
Figure 6 1PPS Output Enable/Disable........................................................................... 18!
Figure 7 Configuring IRIG B output format .................................................................... 19!
Figure 8 Baud Rate Selection for Time of Day Output................................................... 20!
Figure 9 - NTP-800 System Screen............................................................................... 24!
Figure 10 - NTP-800 Network Screen............................................................................ 26!
Figure 11 - NTP-800 Network Screen Showing Configuration Changes ....................... 28!
Figure 12 - NTP-800 Network Screen After IP Change ................................................. 29!
Figure 13 - NTP-800 NTP Configuration Screen ........................................................... 30!
Figure 14 - NTP-800 Status Screen............................................................................... 34!
Figure 15 - NTP-800 Event Log Screen......................................................................... 36!
Figure 16 - Basic Method of Delay Calculation Over a Network.................................... 43!

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Figure 17 – Explanation of Hierarchical Stratum Structure............................................ 44!
Table of Tables
Table 1 - NTP-800 Status Screen.................................................................................. 13!
Table 2 Long Reach Antenna Connections J16 ............................................................ 16!
Table 3 J9 Pin Connections ........................................................................................... 17!
Table 4 J10 Pin Connections ......................................................................................... 19!
Table 5 Figure 9 Power Cord Ordering Information....................................................... 22!
Table 6 - Faults/Troubleshooting guide ......................................................................... 48!

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Quad%Port%Network%Time%Server!(NTP-800)!
1 System Overview
1.1 Introduction to the NTP800 Multiport Time Server
This manual shows you how to install, configure and operate your NTP800 to provide
an NTP time server for your network. Once up and running the NTP800 will provide
accurate time synchronization for your computer clients to within microseconds on a
LAN and tens of milliseconds over a WAN,
Prior to installing the NTP800 please read the site preparation section first to ensure the
smooth operation of your NTP800 when it is installed. Then follow the quick setup guide
to get your NTP800 up and running. The remaining sections give more details on the
configuration and operation of the NTP800.
1.2 NTP-800 system overview
The NTP800 time server is a stratum 1 NTP server that can synchronize from up to
three external reference sources; GNSS, IRIG and serial time of day with PPS. There is
also a 10MHz input to maintain the timescale during periods of holdover.
The user can choose to select which of the reference sources is in use or allow the unit
to arbitrate amongst the available sources by using the TimeWall™ time validation &
verification algorithm. In this mode the sources have a default priority order of GNSS,
IRIG, Time of Day and 10MHz. Any of the reference sources can be promoted to the
top priority, the remaining ones demoted in the same order. All the sources are
continually monitored to ensure that they are the best source of time synchronization.
In addition, if the reference source is removed or not present, the unit can operate in
peer to peer mode with up to four NTP peer servers defined, the NTP stratum level
changing accordingly.
The network interfaces to NTP800 allow either an SFP module to be fitted or the RJ45
associated with a port to be used. If an SFP module is fitted the RJ45 connection is
disabled. The four network ports are entirely isolated from each other.
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

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1.3 Specifications (Basic Unit)
1.3.1 Reference Inputs
Commercial GNSS
!
!
GPS Pulse-per-second (1PPS) Input
GPS Have Quick Time Code Input
External IRIG B Input
External Sync Input (applicable when internal GPS
option is installed)
External 10MHz Reference Input!
1.3.2 Outputs
Pulse-per-second (1PPS) Output 1
Have Quick Time of Day Output
BCD Time Code Output
IRIG B Time code Output
Alarm Output
Reference Frequency Outputs
NTP Output
Management
Power and Environmental Specifications
Power
No of Inputs 1 standard, 2 redundant optional
Voltage 90-250VAC ±10% 50/60 Hz
Connector IEC 320 standard, optional
MS3102A-10SL-3P
Physical Dimensions
Length (depth)
Width 17.00” (Chassis) – 19.00” (Front
Panel)
Height
Weight
Cooling Requirements
Air Temperature -15ºC to +53ºC
Altitude Conditions 1500 ft to +11,000 ft.
Shock and Vibration Requirements or Sensitivities
Functional (operating) Shock
MIL-STD 810F Method 516.5
Procedure I
Bench Handling Shock
MIL-STD 810F Method 516.5
Procedure VI
Vibration, Functional (operating)
MIL-STD-167-1
EMI EN55022, EN55024, FCC Part 15
Safety CE Certified

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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.
The antenna is a sealed unit. It should be located outside where there is good sky-
coverage (e.g. on a roof) and away from high frequency electrical interference sources.
It is highly recommended to use the fixings supplied and not to make any additional
holes for fixing since this compromises the IP65 rating of the antenna.
The antenna is supplied with 30m/100ft of RG58 cable. If longer cable runs are
required, it is possible to use a higher quality cable such as RG213 or LMR-500, or the
long reach GPS antenna option P/N 100DG000C. The long reach antenna allows the
antenna to be connected via low cost CAT5 cable, at distances of up to 2000ft/1800m
Type of Cable Maximum Length of Cable Cable P/N
RG58 34m/120ft 002-037 (included)
LMR-500 100m/330ft 002-0108
2.1.1.2 Power
The NTP800 requires 90-240V AC @ 50-60Hz for power.
Power Consumption is <30W
2.1.1.3 Network
The NTP800 has four RJ45/SFP network connections. If an SFP module is fitted
for a port, the associated RJ45 port is disabled.

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2.1.1.4 Reference sources
The NTP800 requires a source of time in order to provide a traceable reference to
NTP clients. The unit’s time at power on is from a battery backed Real Time Clock.
The available references are:
•GNSS (GPS/Glonass/Beidou) from the included GNSS receiver. This requires an
antenna to be installed with appropriate view of the sky.
•Serial Time Code. The time code supported is IRIG B. Either the 1kHz modulated
code (IRIG B127) or the DC Level Shift variant is supported (IRIG B007)
depending on model and jumper settings.
•ASCII Serial time of day message (both RS422 or RS232 levels) with the support
for the following protocols
oNMEA0183 protocol $GPZDA
oTFS message 1 and 1pps.
2.1.2 Mounting
The NTP-800 can be installed into a 19” rack mount cabinet using rack slides. Slides
are installed using 10-32 UNF-2B hardware.
Optional Rack Mount Slides:
P/N 002000123, SLIDE, RACK, 24", 21" TRAVEL, 85 LB
P/N 002000150, SLIDE, RACK, 28", 27" TRAVEL, 80 LB
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 Antenna
Connect the antenna to the BNC connector J17 labeled “GPS Antenna” on the rear of
the unit.
2.1.5 Ethernet
Connect one end of an Ethernet patch cable to one of the Etherent ports located on the
rear of the unit (J1 – J8) . Connect the other end of the Ethernet cable to the network
with an Ethernet hub or switch.
The network ports are supplied with default IP addresses of:
ETH1 192.168.102.92 J1/J2
ETH2 192.168.103.92 J3/J4

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ETH3 192.168.104.92 J5/J6
ETH4 192.168.105.92 J7/J8

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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
each in sequence, expressed in the standard dot decimal format, with the left most digit
indicating the port number 1 to 4
3.1 Accessing the NTP-800
Once the NTP-800 is powered on and connected to the network, open up a web
browser on a device connected to the same network as the NTP-800. If prompted, enter
the username and password for the device.
NOTE
The NTP-800’s factory settings have no default username and
password for the system. Ensure you configure appropriate
security settings for your environment after setting it up.

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Figure 2 - NTP-800 Status Screen
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. This can either be the local time
in the current time zone or UTC,
depending on user settings.
GNSS Status
Displays the current status of the
GNSS receiver.
Sats
Displays the current number of
satellites tracked and satellites in view.
Latitude
Displays the current latitude of the
GNSS receiver.
Longitude
Displays the current longitude of the
GNSS receiver.
Altitude (ellipsoid)
Displays the current Altitude of the
GNSS receiver.

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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.
Figure 3. NTP800 Network Settings
Configure each port as required. Note that submit must be pressed for each port
modified. Changing ports without submitting will lose any changes.
Select the services required for the port, SUPPORT provides SSH access and is used for
factory support and firmware update when using SCP.
Once the settings have been made, press the submit button.
Depending on whether the IP address of the port being accessed is being changed the
page will show either some reconfiguration information or a link to the new address.
Click this link to return to the status page otherwise use the STATUS button. These steps
are shown in more detail in section 5.2.

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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’ IP addresses as required along with
a polling interval range this should be from 64s, the NTP standard.
Press submit to make the changes. Reconfiguration information is displayed. The
STATUS button can be used to return to the status page.
Further details on the NTP configuration can be found in section 5.3.1
The NTP800 will now be configured and able to serve time on your network.
The following sections give further and more detailed descriptions on configuring and
running the NTP800.

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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. The antenna connector is a BNC Socket (50 ohm) and its connections are;-
Center Pin: GPS Signal 1.6GHz (& +5v antenna amplifier power)
Shield: GPS Return.
4.1.1.2 Long Reach GNSS Antenna for NTP800 P/N 040003XX
The Long Reach Antenna P/N 100DG000C is connected to the RJ-45 connector labeled
J16 Remote GPS.
Table 2 Long Reach Antenna Connections J16
Pin
Signal
1
+15 V /200mA max power
2
GND
3
1PPS-
4
Data In -
5
Data In +
6
1PPS+
7
Data Out -
8
Data Out +
4.1.2 IRIG B Time Code input
The IRIG B time code input is connected to BNC connector J15.
The pin connections are as follows
Center Pin: Time Code input
Shield: Time Code Return

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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. Either RS422 or RS232 electrical connections can be used and must be
selected from the CONFIGURE->NTP webpage.
Table 3 J9 Pin Connections
Pin
Signal
1
No Connection
2
No Connection
3
RS422 RX-
4
GND
5
RS232 RX
6
RS422 RX+
7
No Connection
8
No Connection
4.1.4 1 PPS input
This 1PPS input is used to provide the on-time mark for the time of day. Time of
day message will follow the PPS to which it is associated. The 1PPS input is
connected to BNC connector J13.
The pin connections are as follows
Center Pin: 1PPS input, rising edge
Shield: 1PPS Return
Impedance: 50ohm
Voltage: 2.5 to 5.5V max
4.1.5 10MHz Input
The NTP800 can accept a 10MHZ sinewave output on BNC connector J11. The 10MHZ
input can be used as a frequency reference input, and selected to provide holdover
capability in the event that other references are lost.
The pin connections are as follows
Center Pin: 10MHz Input
Shield: 10MHz Return
Impedance: 50 ohm
Amplitude: 8 -15dBm

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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. The 1PPS output may be enabled or disabled by means of a
webpage setting as shown in Figure 6Figure 6. The PPS output box should
include the button highlighted as shown to enable the 1PPS output.
Figure 6 1PPS Output Enable/Disable
The pin connections are as follows
Center Pin: 1PPS output, rising edge
Shield: 1PPS Return
Voltage: >2.5V into 50ohm
NOTE
If enabled The 1PPS output will be available from initial power on,
although it should be noted until the NTP800 has synchronized the 1
PPS will not be within the quoted accuracy specifications. Upon
synchronization of the NTP800 to the selected reference, the 1PPS will
be accurate to the quoted specifications.

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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.
Configuration for IRIG B12X Install JP25 Remove JP26
Configuration for IRIG B00X Install JP26 Remove JP25
Figure 7 Configuring IRIG B output format
4.2.3 Time of day output
The time of day output is an RJ45 connection J10 with the following pin out. RS422 and
RS232 are available from the pins shown below:
Table 4 J10 Pin Connections
Pin
Signal
1
RS422 TX+
2
RS422 TX-
3
No Connection
4
GND
5
RS232 RX
6
RS232 TX
7
No Connection
8
No Connection

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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
An!example!of!the!ZDA!message!string!is:!
$GPZDA,172809.456,12,07,1996,00,00*45!
4.2.3.1.1ZDA)message)fields)
Field
Meaning
0
Message ID $GPZDA
1
UTC
2
Day, ranging between 01 and 31
3
Month, ranging between 01 and 12
4
Year
5
Local time zone offset from GMT, ranging from 00
through ±13 hours
6
Local time zone offset from GMT, ranging from 00
through 59 minutes
7
The checksum data, always begins with *
Fields!5!and!6!together!yield!the!total!offset.!For!example,!if!field!5!is!-5!and!field!6!is!+15,!local!time!is!5!
hours!and!15!minutes!earlier!than!GMT.!