Brandywine PTP-800 User manual

User Manual
Quad Port PTP Time Server
PTP-800
For Brandywine Communications and Time &
Frequency Solutions Part Number:
050600XXX
900600200 Rev. A
June, 2023

Revision History
REVISION DATE COMMENTS ECO NUMBER
A 2023/06/08 Initial Release ECO12629
ii

Safety Warnings
WARNING:
The lightning flash with an arrowhead inside of an
equilateral triangle is intended to alert the user to
the presence of uninsulated “dangerous voltage”
within the product’s enclosure. The “dangerous
voltage” may be of sufficient magnitude to con-
stitute a risk of electrical shock to people.
WARNING:
This unit contains dual power supplies. Isolate
BOTH power supplies from power before remov-
ing the top cover.
CAUTION:
Observe all necessary precautions for handling
electrostatic discharge sensitive devices when
handing component modules. Improper handling
will damage internal circuitry.
iii

Contents
1 Overview 1
1.1 Introduction................................ 1
1.2 SystemOverview ............................. 2
1.3 Specifications ............................... 4
1.3.1 ReferenceInputs ......................... 4
1.3.1.1 GNSS .......................... 4
1.3.1.2 Outputs......................... 4
1.3.1.3 Connections . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.1.4 Interface Standards . . . . . . . . . . . . . . . . . . . 5
1.3.1.5 Configuration and Status . . . . . . . . . . . . . . . 5
1.3.1.6 Physical......................... 6
1.3.1.7 Environment ...................... 6
1.3.1.8 Input Synchronization Accuracy . . . . . . . . . . . . 6
1.3.1.9 Frequency Stability . . . . . . . . . . . . . . . . . . . 7
2 Quick Start Guide 9
3 Installation 11
3.1 SitePreparation.............................. 11
3.1.1 Antenna.............................. 11
3.1.1.1 Power .......................... 12
3.1.1.2 Network......................... 12
3.1.1.3 Reference Sources . . . . . . . . . . . . . . . . . . . 12
3.1.1.4 Power .......................... 13
3.1.1.5 Antenna......................... 13
3.1.1.6 Ethernet......................... 13
v

4 Setup 15
4.1 AccessingthePTP800 .......................... 16
4.2 Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3 SourcesandNTP............................. 19
4.4 PTPConfiguration ............................ 20
5 Connections 21
5.1 Input Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1.1 GNSS Antenna Connections . . . . . . . . . . . . . . . . . . . 22
5.1.1.1 Standard GPS Antenna . . . . . . . . . . . . . . . . 22
5.1.1.2 Long Reach GPS Antenna . . . . . . . . . . . . . . . 22
5.1.2 IRIG B Time Code Input . . . . . . . . . . . . . . . . . . . . 23
5.1.3 ASCII Serial Time Of Day Input . . . . . . . . . . . . . . . . 23
5.1.4 1PPSInput ............................ 24
5.1.5 10MHzInput........................... 24
5.2 OutputConnections ........................... 25
5.2.1 1PPSOutput ........................... 25
5.2.2 IRIG Time Code Output . . . . . . . . . . . . . . . . . . . . . 26
5.2.3 Time of Day Output . . . . . . . . . . . . . . . . . . . . . . . 27
5.2.3.1 NMEA0183 Message format GPZDA . . . . . . . . . 28
5.2.3.2 TFS Message1 . . . . . . . . . . . . . . . . . . . . . 29
5.2.4 10MHzOutput.......................... 29
5.3 NetworkPorts............................... 30
5.4 PowerConnection............................. 31
5.5 Default Setting / IP Button . . . . . . . . . . . . . . . . . . . . . . . 32
6 Web Configuration 33
6.1 SystemSecurity.............................. 35
6.1.1 Login Credentials . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.1.2 Remote Configuration Access . . . . . . . . . . . . . . . . . . 37
6.1.3 SNMP v3 Credentials . . . . . . . . . . . . . . . . . . . . . . . 38
6.1.4 NTP Aunthentication . . . . . . . . . . . . . . . . . . . . . . . 38
6.2 Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.3 Configure ................................. 44
6.3.1 NTP................................ 44
6.3.1.1 STATS ......................... 45
6.3.1.2 AUTO-OFF / Holdover . . . . . . . . . . . . . . . . 45
6.3.1.3 Leap Second . . . . . . . . . . . . . . . . . . . . . . 45
vi

6.3.1.4 SignalMask....................... 46
6.3.1.5 Elevation Mask . . . . . . . . . . . . . . . . . . . . . 46
6.3.1.6 CableDelay....................... 46
6.3.1.7 Mode .......................... 46
6.3.1.8 IRIGyear........................ 47
6.3.1.9 AC/DCLS........................ 47
6.3.1.10 LocalTime ....................... 47
6.3.1.11 CableDelay....................... 47
6.3.1.12 TimeofDay ...................... 48
6.3.1.13 Localtime........................ 48
6.3.1.14 Peer Servers 1-4 . . . . . . . . . . . . . . . . . . . . 48
6.3.1.15 Mulitcast (or Broadcast) Address . . . . . . . . . . . 49
6.3.1.16 Local Time Zone . . . . . . . . . . . . . . . . . . . . 49
6.3.2 Outputs .............................. 50
6.4 Status ................................... 51
6.4.1 Status ............................... 51
6.4.2 PTPStatus ............................ 53
6.5 Events................................... 54
6.5.1 SystemEvents .......................... 55
6.5.2 GPSEvents............................ 55
6.5.3 NTP Server Events . . . . . . . . . . . . . . . . . . . . . . . . 56
6.6 RemoteRestart.............................. 57
7 Precision Time Protocol 59
7.1 WhyUsePTP?.............................. 59
7.2 PTPHeirarchy .............................. 61
8 Maintenance 63
8.1 Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.2 Uploading New Firmware . . . . . . . . . . . . . . . . . . . . . . . . 64
9 Frequently Asked Questions 65
10 Troubleshooting 67
10.1StatusLEDMeanings .......................... 68
10.2 Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . 69
11 Updating Firmware and FPGA 71
vii

A Support Information 73
B Network Time Protocol 75
B.1 Why use the Network Time Protocol . . . . . . . . . . . . . . . . . . 75
B.2 UnderstandingNTP ........................... 76
B.3 NTPHierarchy .............................. 77
C SNMP MIB Format 79
C.1 Brandywine Common MIB . . . . . . . . . . . . . . . . . . . . . . . . 79
C.2 TFSCommonMIB............................ 91
D TFS Message4 Format Definition 101
Front Panel Drawing 103
Rear Panel Drawing 105
Parts List 107
viii

List of Figures
1.1 BlockDiagram .............................. 3
2.1 QuickSetupGuide ............................ 10
4.1 PTP800FrontPanel ........................... 15
4.2 StatusWebPage ............................. 16
4.3 Network Setting Web Page . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4 NTP Configuration Web Page . . . . . . . . . . . . . . . . . . . . . . 19
4.5 PTP Configuration Web Page . . . . . . . . . . . . . . . . . . . . . . 20
5.1 RearPanelDrawing ........................... 21
5.2 1PPSOutput ............................... 25
5.3 Configuring IRIG B Output Format . . . . . . . . . . . . . . . . . . . 26
5.4 Baud Rate Selection for Time of Day Output . . . . . . . . . . . . . 27
6.1 NavigationMenu ............................. 33
6.2 SystemScreen............................... 35
6.3 Web Security Settings . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.4 SNMP v3 Credentials Input Area . . . . . . . . . . . . . . . . . . . . 38
6.5 NTP Authentication Key Input . . . . . . . . . . . . . . . . . . . . . 38
6.6 Network Settings Screen . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.7 Network Screen Showing Configuration Changes . . . . . . . . . . . . 42
6.8 Network Screen After IP Address Change . . . . . . . . . . . . . . . . 43
6.9 NTP Configuration Screen . . . . . . . . . . . . . . . . . . . . . . . . 44
6.10 PTP800 Status Screen . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.11EventLogScreen............................. 54
6.12 Detail View of Remote Restart Option . . . . . . . . . . . . . . . . . 57
6.13 Remote Restart Complete . . . . . . . . . . . . . . . . . . . . . . . . 58
ix

7.1 PTPProtocolDiagram.......................... 60
7.2 PTP Heirarchical Structure . . . . . . . . . . . . . . . . . . . . . . . 61
B.1 NTP Propagation Delay . . . . . . . . . . . . . . . . . . . . . . . . . 76
B.2 NTP Stratum Structure Diagram . . . . . . . . . . . . . . . . . . . . 77
D.1 FrontPanelDrawing ........................... 103
D.2 RearPanelDrawing ........................... 105
x

List of Tables
1.1 Oscillator Frequency Stability . . . . . . . . . . . . . . . . . . . . . . 7
4.1 StatusWebPage ............................. 17
5.1 Long Reach Antenna Connections J16 . . . . . . . . . . . . . . . . . 22
5.2 J9PinConnections............................ 23
5.3 J10PinConnections ........................... 27
5.4 ZDAMessageFields ........................... 28
5.5 TFSMessage1Fields........................... 29
5.6 Power Cord Ordering Information . . . . . . . . . . . . . . . . . . . . 31
6.1 Port Specific Network Settings . . . . . . . . . . . . . . . . . . . . . . 41
6.2 Port Non-specific Network Settings . . . . . . . . . . . . . . . . . . . 41
6.3 Output Configuration Options . . . . . . . . . . . . . . . . . . . . . . 50
6.4 SystemEvents............................... 55
6.5 GPSEvents................................ 55
6.6 NTPServerEvents............................ 56
9.1 Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . 65
10.1 Faults/Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . 69
D.1 TFS Message4 Format Definition . . . . . . . . . . . . . . . . . . . . 101
xi

Chapter 1
System Overview
1.1 Introduction to the PTP800 Multi-port Time
Server
This manual shows you how to install, configure and operate your PTP800 to provide
a Precise Time Protocol (PTP) time server for your network. Once up and running
the PTP800 will provide accurate time synchronization for your computer clients to
within nanoseconds on a Local Area Network (LAN) and tens of microseconds over
a Wide Area Network (WAN).
Prior to installing the PTP800 please read the site preparation section first to ensure
the smooth operation of your PTP800 when it is installed. Then follow the quick
setup guide to get your PTP800 up and running. The remaining sections give more
details on the configuration and operation of the PTP800.
1 of 107
900600200 Rev. A

1.2. SYSTEM OVERVIEW CHAPTER 1. OVERVIEW
1.2 PTP800 System Overview
The PTP800 time server is a PTP Grandmaster that can synchronise from up to
three external reference sources: Global Navigation Satellite Systems (GNSS)—such
as the Global Positioning System (GPS)—Inter Range Instrument Group (IRIG)
Time Code and serial time of day with Pulse Per Second (PPS). There is also a
10 MHz 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 10 MHz. 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.
The network interfaces to PTP-800 allow either a Small Form Factor Pluggable (SFP)
module to be fitted or the Reference Jack 45 (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 PTP800 provides frequency output of 1 PPS and 10 MHz and time outputs of
IRIG Direct Current Level Shift (DCLS) or AC (depending on model) and serial
time of day in RS422 and RS232.
See Figure 1.1 on the facing page for a block diagram of how the PTP800 operates.
2 of 107
900600200 Rev. A

CHAPTER 1. OVERVIEW 1.2. SYSTEM OVERVIEW
Figure 1.1: PTP800 Block Diagram
3 of 107
900600200 Rev. A

1.3. SPECIFICATIONS CHAPTER 1. OVERVIEW
1.3 Specification (Basic Unit)
1.3.1 Reference Inputs
1.3.1.1 Commercial GNSS
•GNSS, Active or Long Distance Antenna
•1 PPS with Serial Time of Day
•IRIG B, AC or DC
•NTP Client
•10 MHz
1.3.1.2 Outputs
•IRIG-B, AC or DC
•1 PPS
•Serial Time of Day
•10 MHz
1.3.1.3 Connections
•Four combo RJ45/SFP connectors for 10/100/1000 BASE-T networks
•GNSS antenna either with 50 Ω BNC socket or RJ45
•IRIG-B input/output with 50 Ω BNC sockets. Independently supports IRIG-
B000 to 0007, or B120 to B127
•1PPS input/output (rising edge) with BNC sockets at 5 V 10 MHz sine wave
input/output with BNC sockets at 5 V rms micro USB-B port for support
4 of 107
900600200 Rev. A

CHAPTER 1. OVERVIEW 1.3. SPECIFICATIONS
1.3.1.4 Interface Standards
•PTP [IEEE 1588v2]
•NTP V3 [RFC 1305], V4 [RFC5905], SNTP V4[RFC 4330]
•SNMPV1[RFC1155/7], V2c[RFC1901/8], V3 [RFC 3411/8]
•Ethernet/ IEEE802.3
•IPv4 [RFC 791], IPv6[RFC2460, 8200]
•ICMP ping [RFC 792]
•SSH [RFC 4250-4254]
•HTTP [RFC 7540]
•DNS [RFC 1034/5]
•FTP [RFC 765]
1.3.1.5 Configuration and Status
Secure web browser configuration of all Network, Protocol, Input and Output op-
tions. Stored in non-volatile memory.
“Restore Defaults” button for factory reset.
Web browser indicates status and system log.
Status available through SNMP.
9 Digit LED panel displaying Day and Time. Status LEDs to show synchronization
status and power.
User specific network parameters can be factory-configured upon request.
All Ethernet ports available for upgrade of flash code for newer versions or additional
options.
5 of 107
900600200 Rev. A

1.3. SPECIFICATIONS CHAPTER 1. OVERVIEW
1.3.1.6 Physical (Stand Alone Unit)
Size : 19-inch rack mounting 1U high 200 mm deep
Weight : 4.5 kg
Power : Dual redundant option, hot swappable
AC Power : 90 V to 264 V AC 50-60 Hz
Load 20 W (typical), subject to oscillator.
Connection via 3 pin IEC plug
DC Power : 18 V to 36 V DC
36 V to 72 V DC
Isolation : 2250 V DC Input-Output
Display : 9 digit display + 6 status LEDs
1.3.1.7 Environment (Operation & Storage)
Temperature : −5◦C to + 50 ◦C
Humidity : Up to 95% RH (non-condensing)
EMC : CE compliant
Safety : IEC 60950-1, CSA 22-2
1.3.1.8 Input Synchronization Accuracy (Rb and OCXO Options)1
GNSS : ±100 ns from UTC
IRIG-B AC : ±500 ns
IRIG-B DC : ±2µs
PPS with Time of Day : ±100 ns
NTP Client : ±50 µs from UTC, dependent on network.
10 MHz : Unit will track the input signal if it has time
1TCXO option – accuracies up to 10 times degraded
6 of 107
900600200 Rev. A

CHAPTER 1. OVERVIEW 1.3. SPECIFICATIONS
1.3.1.9 Frequency Stability
Table 1.1 below shows the frequency stability of the various oscillator options for the
PTP800.
Table 1.1: Oscillator Frequency Stability
Oscillator Stability
per ◦CPerformance while disciplined Averaging Time
Holdover accuracy at
constant temperature
after loss of reference.
Time Frequency
Option Description 1s 10s 100s 1000s 10000s 1 day 1 day 1 day 3 days
12TCXO 1.5×10−82×10−95×10−10 5×10−10 5×10−10 6×10−11 1×10−12 <2 ms <2×10−8<3×10−8
2 OCXO 1.2×10−10 3×10−10 3×10−10 4×10−10 4×10−10 5×10−11 1×10−12 <60 µs<2×10−9<4×10−9
3 Rubidium 7 ×10−12 3×10−11 8×10−12 3×10−12 3×10−12 2×10−12 8×10−13 <1µs<1.0×10−11 <1.5×10−11
As we are always seeking to improve our products, the information in this document
only provides general indications of product capability, suitability and performance,
none of which shall form any part of any contract.
2N.B. Option 1 TCXO supplied as standard unless otherwise specified
7 of 107
900600200 Rev. A