IEEE1588 Time Analyzer Contents - Tirumala Seven Hills ...€¦ · IEEE1588 Time Analyzer Contents ... like IEEE1588v2 time server, PTN/OTN/xPON etc, and base ... 40m GPS Antenna

IEEE1588 Time Analyzer Contents

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Contents Contents...........................................................................................................................1 1. Overview...................................................................................................................2

1.1 Symbol Descriptions ........................................................................................2

1.2 Product Overview.............................................................................................2

1.3 Ordering Information ........................................................................................3

1.4 Product Compositions......................................................................................4

2. Getting Started .........................................................................................................6 2.1 Unpacking Check.............................................................................................6

2.2 Power Supply...................................................................................................6

2.3 Switch-On ........................................................................................................7

2.4 Communication with PC...................................................................................8

2.5 Safety Precautions...........................................................................................9

3. Navigating the Displays.........................................................................................12 3.1 Menu Overview ..............................................................................................12

3.2 “Time Test” Menu ...........................................................................................13

3.3 “Frequency Test” Menu ..................................................................................17

3.4 “BITS Simulation” Menu.................................................................................19

3.5 “Wander Test”.................................................................................................19

3.6 “Storage” Menu ..............................................................................................20

3.7 “System” Menu...............................................................................................21

4. Performing Measurements....................................................................................22 4.1 Overview ........................................................................................................22

4.2 Performing the Measurements.......................................................................22

5. Functions & Specifications ...................................................................................29 6. Working with TestManagerPro..............................................................................31

6.1 Software Functions ........................................................................................31

6.2 System Configurations and Running Environment.........................................31

6.3 Install and Uninstall the Software on the PC ..................................................32

6.4 How to Use TestManagerPro .........................................................................32

Appendix: Abbreviations ...........................................................................................34

IEEE1588 Time Analyzer 1 Overview

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1. Overview This chapter briefly describes the symbols in the manual, product overview, ordering information, product compositions for the instrument.

1.1 Symbol descriptions

1.2 Product overview

1.3 Ordering information

1.4 Product compositions

1.1 Symbol Descriptions The following symbols in the manual indicate precautions or information which must be taken to maintain safe and right operation of the instrument.

“Caution” symbol denotes attention to the operation of the instrument.

“Warning” symbol denotes a hazard. It calls attention to a procedure, which if not correctly performed or adhered to could result in injury or loss of life, or serious damage or destruction to the instrument.

Before operation, the instructions following above symbols in the manual must be fully understood and met to ensure the right and safe operation of this instrument.

1.2 Product Overview The IEEE1588 Time Analyzer is one kind of time and frequency synchronization analyzer which can perform high precision measurement and analysis based on IEEE 1588v2 time and clock synchronous system, and is applicable in TD-SCDMA, TD-LTE, FDD-LTE, CDMA, WCDMA, CDMA2000, etc. It is used in R&D, production, installation, commisioning and maintenance etc.

IEEE1588 Time Analyzer mainly provides the following functions:

Built-in precision time-giver GPS and GPS-disciplined Rubidium clock or OCXO produce high-precision UTC time and generate high precision clock to be taken as the time reference for meanusrement

“Note” symbol denotes some help information to the operation of the instrument.


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Perform precision and performance measurement of time synchronization on transmission devices, like IEEE1588v2 time server, PTN/OTN/xPON etc, and base station devices, supporting 1PPS+TOD interface, IEEE1588v2PTP interface

Perform precision and performance measurement of clock synchronization based on IEEE1588v2 clock synchronous system or SyncE clock synchronous system, supporting G.703 2.048MHz, 2.048Mb/s

Perform statistics and analysis on time signal with random deviation and make the asymmetric compensation measurement, so as to provide reliable basis for the customer to work out compensation strategy

Work as supplementary time server to provide time information to the system by using 1PPS+TOD or IEEE 1588v2PTP signal output from the analyzer

GPS-disciplined Rubidium clock can provide at least 2 hours of time-hold capability, which is applicable in such situation as basement which has limited access to GPS antenna

Operate one or more instruments in the same network by remote control with special software and perform various measurements

Perform up to 7x24 hours continuous test to make statistics and analysis on the long term wander performance of time/clock synchronization, and calculate MTIE, TDEV

Perform self-calibration by connecting GPS antenna and locating satellite for 25 hours

Real-time screen grab function, and able to save the real-time test results in graphic format at any time to ensure the objectivity of test results

Manual, auto and timer test available; 4G of storage capability

Large capability of battery power, continuous working for 4~9 hours

Test results can be uploaded to PC by TestManagerPro via Ethernet port or U-disk for further filing, analysis, printing, etc. Also software can output the results to files which are able to be processed by PC.

1.3 Ordering Information Standard configuration list of the IEEE1588 Time Analyzer:

Item Qty. Item Qty.

IEEE1588 Time Analyzer 1 Li-ion Rechargeable Battery

(Built-in) 1

AC Charger 1 Rubidium Clock or OCXO (Built-in) 1


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GPS Antenna

(Mushroon Connetor) 1

TestManagerPro CD （User Manual included） 1

GPS Antenna Bracket 1 Protective Cap 1

40m GPS Antenna 1 User Guide 1

Parallel Network Cable

(Direct Connection) 2 Quality Certificate Card 1

Grounding Cable 1 Maintenance Card 1

Coaxial Cable 4 Portable Carrying Case 1

120Ω Balance Test Cable 1 Packing List 1

Table 1-1 Standard configuration list

Optional configuration list of the IEEE1588 Time Analyzer:

Option Name Qty Option Name Qty

PTP Master 1 60m GPS Antenna 1

Wander Test 1

SFP Module and Patch Cord Type and Quantity can be ordered as per requirement

Table 1-2 Optional configuration list

1.4 Product Compositions IEEE1588 Time Analyzer consists of following modules:

• Firmware: Main board, Interface board, Power board and LCD board.

• Software: the embedded software, surveillance and management PC software.

• Accessories: Portable Carrying Case, Special Test Cables, Charger, GPS Antenna, Bracket, 40m GPS Antenna, etc.

1.4.1 Compositions of Instrument

• Front panel: LCD display, LED indicator, Switch button.

• Back panel: Serial number label, Bracket.

• Upper end: GPS antenna signal input port, 1PPS+TOD signal input/output port, E1 signal input/output port, Ethernet port (PTP), Outer reference source input port.

• Down end: Ethernet port, USB port, Master-slave USB port, Power input jack, Grounding port.


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1.4.2 Appearance of Instrument The appearance of the instrument is as shown in Fig 1-1:

Fig 1-1 Appearance of the IEEE1588 Time Analyzer

LED Indicator

Test Interface

LCD Touchscreen

Switch

Communication Port

IEEE1588 Time Analyzer 3 Navigating the Displays

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2. Getting Started This chapter briefly introduces the unpacking check, power supply, switch-on, communication with PC for the instrument and safety precautions for the operators.

2.1 Unpacking check

2.2 Power supply

2.3 Switch-on

2.4 Communication with PC

2.5 Safety precautions

2.1 Unpacking Check In order to safely transport, the IEEE1588 Time Analyzer is packed with a paper carton, and with all accessories placed in a portable carrying case.

Please check when receiving the product:

• If the packing carton is impaired and if the appearance of the product is impaired.

• If the instrument and all its accessories are available.

The standard configuration list of the IEEE1588 Time Analyzer is shown in Table 1-1.

The optional configuration list of the IEEE1588 Time Analyzer is shown in Table 1-2.

Caution:

Please check the configurations of instrument item by item according to the packing list. Please contact your vendor if anything is unavailable.

Please fill in the product maintenance card carefully and take good care of it.

If necessary, keep the packing materials in case they will be needed some time later.

2.2 Power Supply This instrument can be powered by external power supply or built-in rechargeable battery.

2.2.1 External Power Supply The external power supply is a power source of 100V to 240V AC at a frequency between 50Hz to 60Hz (nominal). And the instrument requires a nominal DC input of 16.8VDC. Plug the AC charger into an appropriate AC wall outlet and connect the instrument. And the instrument can be powered by the external power supply via the supplied Charger.


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2.2.2 Rechargeable Battery This instrument has built-in Li-ion rechargeable battery.

Caution: When the battery supplied for this instrument has been used expiring the charging life or are impaired, they should be dealt with control. If dealt with general waste processing system detained in the instrument, they will harm the instrument. The waste batteries must be recycled or disposed of properly at special recycling station or hazardous waste collection center.

Replacement of Rechargeable Battery:

A new rechargeable battery can be charged and discharged for about 500~800 times before it can not be used any more. Normally the fully charged batteries could support the instrument continuous working for 4 to 9 hours depending upon the test settings. So when the operating duration of the battery is reduced apparently, the batteries should be replaced.

It is strong recommended that the rechargeable batteries should be replaced every one or two years!

The Li-ion recharge battery is customized by the manufacturer. So when the user wants to change the battery, please contact with the supplier. Do not change the battery on your own.

2.2.3 Charging the Battery Please use the supplied Charger to recharge the battery. Note that the instrument can be used while the battery is charging. During charging, the LED indicator in the Charger will turn red. It will turn green when the charging completes.

2.2.4 Low Battery Indication In the status bar user will see the icon . It indicates the power level of the battery. When it shows one level or less, please recharge in time.

2.2.5 Power To save power, user can set the auto power shutdown time and LCD shutdown time in “System“-> “Mischellaneous“.

2.3 Switch-On 2.3.1 Switch-on Inspection Steps

• This instrument can be switched on after pressing “Switch” button for about 2 seconds. After switch-on, the LCD will display manufacturer’s LOGO and the embedded software version information of the instrument. About 10~20 seconds


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later, the switch-on process completes and the program and configurations have been loaded.

• This instrument can be switched off by pressing the “Switch” key again for 5 seconds.

• Switch on the instrument and check if LCD display is normal.

2.3.2 Setting the Time and Date

Time and date can be set in the menu of Time Settings in System. After the settings, click “OK” to make it effective.

2.4 Communication with PC This instrument supports communication with PC via U-disk or Ethernet port with help of TestManagerPro software. And TestManagerPro can do two jobs: one is to upload the test results stored in the instrument to PC for further processing including filing, printing and analyzing, outputting Excel file, and the other is to upgrade the embedded software via PC to protect your investment.

2.4.1 Communication Steps • Connect the instrument with PC via Network cable

• Enable the Ethernet port and set IP in Network Settings of System menu.

• Run the TestManagerPro software on PC, click “Select” button to choose the instrument’s type and click “Connect” button to choose Ethernet. If Specify IP is selected, please set the correct IP address. After successful connection, the user can upload, view, analyze, delete, print test results in the form of report and upgrade the instrument.

2.4.2 Upgrading the Embedded Software

Manufacturer will launch the latest version embedded software and host software TestManagerPro in the company website for the users to download. Make sure to visit the website frequently or contact your vendor to ensure you will always get the software of the latest version. For the software upgrading method, please refer to the relevant part of “Communication with PC” and follow instructions of the TestManagerPro.

Caution: When performing the embedded software upgrading, in order to prevent the instrument from auto power off due to battery exhausting, it is strongly recommended to use external Charger to power on the instrument.


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2.5 Safety Precautions The following general safety precautions must be observed during all phases of operation, packing, transportation, service, and repair of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. The manufacturing company assumes no liability for the customers’ failure to comply with these requirements.

Warning: Do not operate damaged equipment: Whatever it is possible that the safety protection features built into this product have been impaired, either through physical damage, excessive moisture, or any other reason, remove power and do not use the product until safe operation can be verified by service-trained personnel. If necessary, return the product to your vendor and service office for service and repair to ensure the safety features are maintained.

2.5.1 External Power Supply Requirements

Please use the supplied Charger when operating with the instrument or charging the battery. The parameters of the supplied Charger are:

AC Input: 100V ~ 240V, 50/60 Hz, Max 0.5A.

DC Output: 16.8V, Max 2000mA.

Warning:

Do not use other Charger to provide power supply.

This instrument has an external power supply with an autoranging line voltage input. Ensuring the line supply is within the specified range.

The supplied standard Charger should be used indoor only.

DC Connector Polarity:

Fig 2-1 DC connector polarity

2.5.2 Battery Power Requirements

This instrument is designed for Indoor use only.

This instrument should be operated under the following conditions:

+VE

-VE


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Temperature: 0 ~ +50

Altitude: Max 3050m (10,000 feet)

Humidity: 5% ~ 90%, non-condensing

Warning:

This instrument is designed for Indoor use only.

Do not operate the product in an explosive atmosphere or in the presence of flammable gasses or fumes.

2.5.3 Operation Requirements

The instrument contains components sensitive to electrostatic discharge. To prevent component from damaged, follow the handling precautions presented below carefully.

The smallest static voltage most people can feel is about 3500 volts. It takes less than one tenth of 1 second at about 300 volts to destroy or severely damage static sensitive circuits. Often, static damage does not immediately cause a malfunction but significantly reduce the component’s life. Adhering to the following precautions will reduce the risk of static discharge damage.

• Before handling the instrument, select a work area where potential static sources are minimized. Avoid working in carpeted areas and non-conductive chairs. Keep body movement to a minimum. We recommend that you use a controlled static workstation.

• Handling the instrument by its cover. Avoid touching any components or edge connectors.

Warning:

When connecting or disconnecting, ensure that you are grounded to bring you and the instrument to the same static potential.

Do not connect this instrument to any test connector or any signal cable carrying a hazardous voltage.

2.5.4 Special Notes during The Operation

• When using GPS-disciplined reference source, it requires to set up the antenna in an open area to and fix it. Please make sure that the mushroom connector in the antenna is towards the sky and avoid any shelter or reflective objects.

• If the environment is not suitable for setting up the antenna, please discipline the instrument first, and then click “Enter Hold Mode” in “Reference Source Settings” before unplugging the antenna.


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• The instrument adopts color touchscreen operation. Please click with some strength when operating it. Click “Calibrate Screen” in “System” -> “Miscellaneous” to calibrate the touchscreen.

Caution:

Please take care of your hands when folding the antenna.

2.5.5 Storage and Shipment Requirements

The instrument may be stored or transported in environments within the following limits:

Temperature: -30 ~ +70

Altitude: Max 15,200 meters (50,000 feet)

2.5.6 Repacking Requirements

• If the instrument is being returned to the factory for service, please complete the maintenance card, stating the fault and attach it to the instrument.

• Wrap instrument in heavy paper or plastic. If the instrument is being shipped to the factory, attach a tag indicating the type of service you required, return address, model number, and full serial number. Mark the container FRAGILE to ensure careful handling. In any correspondence, refer to the instrument by model number and full serial number.

• Use a strong shipping container. A double wall carton made of 250 pound test material is adequate.

• Use a layer of shock absorbing material 70 to 100 mm (3 to 4 inch) thick, around all sides of the instrument to provide firm cushioning and prevent movement inside the container. Protect the Front LCD Panel and Front End connectors with cardboard.

• Seal shipping container securely.

2.5.7 Maintenance Requirements Maintenance appropriate for the operator is:

Cabinet Cleaning: Clean the panel by using a damp cloth.

Warning:

No adjustable components and operator serviceable parts inside. Refer service to qualified personnel. To prevent electrical shock, please do not dismantle the instrument on your own.


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3. Navigating the Displays This chapter first briefly gives an overview of the six main operating menus, and then explains the relative operations of these main operating menus in details.

3.1 Menu Overview

3.2 “Time Test” Menu

3.3 “Frequency Test” Menu

3.4 “BITS Simulation” Menu

3.5 “Wander Test” Menu

3.6 “Storage” Menu

3.7 “System” Menu

3.1 Menu Overview The operating menus of the IEEE1588 Time Analyzer consist of six functional modules, including 3 testing modules of Time Test, Frequency Test and Wander Test, one Reference Source module of BITS Simulation and two supplementary modules of Storage and System, as shown in Fig 3-1.

Fig 3-1 Main Menu

The basic operations of IEEE 1588 Time Analyzer are as below:

1） Click the required function in the main menu and get into the settings menu

2） Configure the parameters in setting menu and check if the signal is normal in the status bar


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3） After fixing the Refernce Source, click “Start” to start up the test and the interface will switch to “Results” menu automatically

4） During testing, click “Settings”, “Results” to switch between the menus and view relevant settings and results

5） Click “Stop” to end the test if required, and choose to save the results in graphics

6） View the test results on the Results menu by click “Statistics Info.”, “Zoom All”, “Graphics”, “Text” respectively. Click “Screen Grab” to capture the screen and save the snaps.

3.2 “Time Test” Menu Under Main Menu, click “Time Test” and getting into the time test menu. The “Time Test” menu consists of three modules: Settings, Results and Status bar

1） The Status bar consists of five status indications: Time input/output signal status, Reference Source status, Testing status, Power status, and reference time.

2） The Settings consists of three pages: Signal Settings, Reference Source Settings, and Test Control Settings. If selecting PTP slave signal, it has one more page of PTP Network Settings.

3） The Results consists of 3 pages: Offset Statistics, Offset Datum, and TOD Message.

Select “Signal Settings” in “Time Test” Menu and get into the 1PPS+TOD signal settings and PTP slave signal settings respectively, as shown in Fig 3-2 and Fig 3-3.

Fig 3-2 1PPS+TOD Signal settings (Time Test)


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Fig 3-3 PTP Slave Signal settings (Time Test)

Explantions on some parameters In Fig 3-2 and 3-3:

Signal Type: Set the tested signal type according to the input signal from the test port

Interface Type: Set the interface type based on the input signal port; the instrument detects the signal status in real time and shows it in status bar.

Cable Compensation: To compensate the delay at the input end of the cable; the test results will deduct the delay automatically when performing measurement.

Time Server Compensation: To compensate the inherent offset between the time server and the instrument; the test results will deduct the compensate value automatically when performing measurement.

TOD Protocol: Protocol type and corresponding parameters need to be configured when testing TOD protocol.

PTP Protocol: PTP protocol message, delay mechanism, delay mode, etc need to be configured when testing PTP Slave.

PTP Re-synchronization: Click “Re-sync” to accelerate the synchronization process when PTP parameters change.

Select “PTP Network Settings” in “Time Test” menu and getting into the PTP nework settings menu, as shown in Fig 3-4.


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Fig 3-4 PTP Network Settings (Time Test)

PTP Network Settings mainly consists of IP address, Subnet Mask, Gateway, VLAN, and Network Environment.

PTP Network Settings mainly perform settings on the PTP network access environment. Generally test with direct connection does not need to configure PPT network.

Select “Reference Source Settings” in “Time Test” menu and getting into the reference source settings, as shown in Fig 3-5.

Fig 3-5 Reference Source Settings (Time Test)


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Antenna Compensation: To compensate the error due to the delay of antenna.

Reference Source Level: The higher the level is, the longer it takes to discipline. Please select the suitable level based on actual measurement requirement.

Caution:

Click “To Holdover”, and make sure the reference source status shows that holdover takes effect before unplugging the antenna. Do not unplug the antenna before getting into the Hold Mode.

Take 1PPS+TOD Signal as an example. Click “Start” and get into the menu as shown in Fig 3-6.

Fig 3-6 1PPS+TOD Offset Statistics

Explantions on some parameters in Fig 3-6:

Sample Count: The numbers of sampling

Instant Differential: Deviation in current second

Offset Range: The Min and Max deviation of current sample statistics

Mean Differential: The average of all samples

Standard Deviation: The standard deviation of all samples

Asymmetric Evaluation: Make statistics on the Offset Range, Mean Differential, and Standard Deviation of recent samples (10-5000 configurable)


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Reference TOD: Reference Source time of the instrument

Measured TOD: Time of measured signal

Instant Differential: Deviation of current TOD second

On 1PPS+TOD Result menu, click “Offset Datum” and get into the interface as shown in Fig 3-7.

Fig 3-7 1PPS+TOD Offset Datum

Zoom All: Show the deviation of all the samples in graphics

Graphics: Show the deviation of 100 samples in graphics in pages

Text: Show the deviation of 100 samples in text in pages

3.3 “Frequency Test” Menu Under Main Menu, click “Frequency Test” and getting into the frequency test menu. The menu is like that in “Time Test”.

Take 2.048MHz signal as an example, click “Settings” and get into the Signal Settings Menu, as shown in Fig 3-8.


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Fig 3-8 Signal Settings menu (Frequency Test)

Signal Type: The frequency test supports 3 types of signal: 2.048MHz, 2.048Mbit/s, and Ethernet

Line Interface: In 2.048MHz and 2.048Mbit/s there are 75Ω and 120Ω interface

savailable, and in Ethernet there are Copper and Fiber interfaces available Measured Time: Support test frequency of 1 second and 10 seconds

Besides, in 2.048Mbit/s output signal, SSM bit and SSM level can be configured.

Take 2.048MHz signal as an example, click “Start” and getting into the interface, as shown in Fig 3-9.

Fig 3-9 Offset Statistics menu (Frequency Test)


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3.4 “BITS Simulation” Menu Under Main Menu, click “BITS” and get into the BITS simulation menu. The BITS simulation can output time and frequency signals simultaneously.

Time Output: Output 1PPS+TOD or PTP Master time source

Frequency Output: Output 2.048MHz or 2.048Mbit/s signal

Take PTP Master as an example. Select PTP Master in the Time Output Settings and get into the settings interface as shown in Fig 3-10.

Fig 3-10 PTP Master in Time Output Settings

Page 1: Output ports and PTP protocol settings

Page 2: Packet-sending interval settings of PTP protocol

Page 3: PTP network settings

3.5 “Wander Test” Under Main Menu, click “Wander” and get into the wander test menu. The menu is same as that in “Frequency Test”.

Take 2.048MHz signal as an example, click “Start” and get into the interface as shown in Fig 3-11.


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Fig 3-11 Wander Test menu

Sample Statistics: The number of Sampling

Sampling Frequency: Sampling times per second, to test TIE for 50 times each second when it is 50Hz

Offset Range: Max and Min TIE in the sample statistics of current test

In Wander Test, outer signal of 2.048MHz or 2.048Mbit/s can be taken as the reference time source.

3.6 “Storage” Menu Under Main Menu, click “Storage” and get into the storage memu, as shown in Fig 3-12.


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Fig 3-12 Record Menu

Results: To show the records saved in the analyzer

Screen Grab: To show the records of snaps in graphics

View: To view the selected records of settings and results

Delete: To delete selected records

U-Disk Output: To output the selected records to U-disk, and upload to PC for further analysis later on

3.7 “System” Menu The “system” menu consists of four modules: “Network Settings”, “Time Settings”, “Miscellaneous”, and “Tester Info”.

Network Settings: To configure the IP and Subnet Mask, so as to connect PC with instrument via Ethernet port for communication.

Time Settings: To set the local time zone and time & date

Miscellaneous: Includes Auto Power Off, Auto Screen Off, Font Settings, Default Settings, Screen Calibration, U-disk Upgrade, Reference Source Calibration, etc.

Tester Info: Includes Serial Number, Software Version, Firmware Version, Total Volume, Free Volume, Temperature, etc

IEEE1588 Time Analyzer 4 Performing Measurements

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4. Performing Measurements This chapter is intended to help the operator in performing measurements with IEEE1588 Time Analyzer. Full details of some common measurements and how to perform will be described below.

4.1. Overview

4.2. Perform the measurements

4.1 Overview IEEE1588 Time Analyzer combines time/frequency test, BITS simulation, and wander test in one unit. It provides time and frequency synchronization measurement for field operation, check and acceptance, and maintenance in the PTN network. It is applicable in the R&D, production, engineering installation, commisioning, and maintenance in synchronization system of TD-SCDMA, LTE, CDMA2000, etc. It can be used to measure the time/frequency precision, and evaluate the long term stability of the PTP time server.

4.2 Performing the Measurements 4.2.1 Synchronization Performance Measuremt on PTN Devices 4.2.1.1 Frequency Synchronization Test

The frequency synchronization test is mainly performed in measuring the accuracy and wander charateristics of 2Mb/s frequency output from the PTN devices. The IEEE1588 Time Analyzer can be used as the time source to inject the time signal into the PTN devices; also it can perform measurement on 2Mb/s frequency output interface of PTN device. Besides, it can used to measure the frequency precision of FE interface in PTN devices and evaluate the clock synchronization performance.

In the factory, the Rubidium clock in the IEEE1588 Time Analyzer does not require to be disciplined with external GPS antenna. Use the signal from built-in Rubidium clock as the clock reference source directly and inject it into the PTN devices. The accuracy and wander characteristics of clock signal will be measured from clock output interface of PTN devices. The result of the testing is a relative value.The connection diagram is shown in Fig 4-1.

Fig 4-1 2Mb/s Frequency test in single PTN device


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According to the connection diagram shown in Fig 4-1, it can verify the clock locking state and working mode of PTN device with external clock source. When performing Frequency test or Wander test, it can measure the output deviation of 2Mb/s clock signal, or perform the long-term wander measurement to check the quality of clock signal.

Also, without injecting the clock signal into PTN device from the analyzer, the inner clock of PTN device is used to measure the frequency deviation of clock outout in PTN device.

IEEE1588 Time Analyzer can test the 2Mb/s clock signal. It can test the clock frequency from Ethernet port of PTN device directly as well. The connection diagram is shown in Fig 4-2.

Fig 4-2 Frequency Test from Ethernet port

IEEE1588 Time Analyzer can test the clock frequency and its deviation of Ethernet FE port in PTN device, and check the clock transmission performance under synchronous Ethernet Technology. The test interface can be Fiber or Copper.

4.2.1.2 Time Synchronization Test

The service information and time information can be transmitted together along the PTN network. The IEEE1588 Time Analyzer provides 10/100M PTP Fiber/Copper port. When selecting PTP (Slave) mode in the analyzer, the IEEE1588 data can be received directly from the Ethernet port of PTN device and the time information can be parsed. Or it can be connected via 1PPS or 1PPS+TOD port directly to measure the time deviation. Besides, the BITS simulation in the analyzer provides high-precision in-band or out-of-band time source to evaluate the time synchronization performance for the PTN device.

Time synchronization test on PTN devices

IEEE1588 Time Analyzer is used as the time source to inject the time information into the PTN device via time in-band interface. And it will measure the relative deviation via in-band or out-of-band interface when the time information goes through the PTN device. The connection diagram is shown in Fig 4-3a and Fig 4-3b.


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Fig 4-3a Out-of-band time information test

Fig 4-3b In-band time information test

In out-of band time information test, as shown in Fig 4-3a, the IEEE1588 Time Analyzer will analyze the TOD message, and show it on the LCD screen for the user to check directly.

When selecting PTP (Maser) mode in the analyzer, it will inject the time information into the PTN device via out-of-band interface. It will measure the relative deviation via in-band interface when the time information goes through the PTN device. The connection diagram is shown in Fig 4-4.

Fig 4-4 Out-of-band time information test under PTP（Master）mode

The test mode in IEEE1588 Time Analyzer refered above brings good convenience to the measurement of PTN device. Inject different time information by only one set of analyzer, and perform measurement via in-band or out-of-band interface. It simplifies the system setup in time synchronization test greatly.

In the factory, the test mode refered above can be extended to the PTN network system


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conveniently. Inject time information from one PTN device and measure the relative deviation of time information going through PTN network via in-band or out-of-band interface of other PTN device.

Besides, by connecting the external GPS anntena, the IEEE1588 Time Analyzer can perform more accurate measurement on the time/frequency deviation after tracking satellites and clock disciplined, so as to test the transmission quality of system time information and clock signal effectively.

4.2.2 PTP Time Synchronization Server Measurement

By connecting with the output port of the PTP time synchronization server directly, IEEE1588 Time analyzer can measure the time/frequency deviation of PTP time server, check if the PTP protocol data transmits normally or not, and evaluate the wander characteristics (MTIE and TDEV) of time/frequency signal from PTP time synchronization server.

Besides, long-term stability measurement should be performed on the time/frequency of PTP time synchronization server to observe the deviation. The time giver should be switched from GPS to Big Dipper; and then to observe the changes of time output in the switching process and perform the long-term stability measurement after switching.

IEEE1588 Time Analyzer mainly includes frequency test and time test on the PTP time synchronization server measurement solutions, which is described as below seperately.

Frequency test

The Frequency test of IEEE1588 Time Analyzer consists of frequency offset test and wander test. It mainly measures the output indexes of the 2Mb/s clock port or FE port in PTP time synchronization server. Select Frequency test or Wander test in the analyzer, and perform relevant settings based on the interfaces accordingly, and then perform the measurements. The connection diagram is shown in Fig 4-5.

Fig 4-5 Connection diagram of Frequency test


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Time test By connecting with 1PPS or 1PPS+TOD ports directly, the IEEE1588 Time Analyzer can measure the time deviation. Or select PTP (Slave) mode in the analyzer to receive the IEEE1588 data from the Ethernet port of PTP time synchronization server, analyze the related time information and calculate the time deviation.

Select Time Test in the analyzer, set relevant parameters according to the interface of PTP time synchronization server under test, and then perform measurements. The connection diagram is shown in Fig 4-6.

Fig 4-6 Connection diagram of Time test

Measurements on time sever when switching between GPS and Big Dipper

As shown in Fig 4-5, Fig 4-6, connect the analyzer with PTP time server, unplug the GPS antenna, and perform the measurements. The test method is same as that in time/frequency/PTP test refered above. This test is mainly to observe if there is any hop in PTP time server during the switching process between GPS and Big Dipper as the time giver. The switching process between GPS and Big Dipper completes via PTP time server and it just requires test by connecting analyzer to the time or frequency port of time server.

4.2.3 Engineering Maintetance Measurement on PTN Synchronization

1） Measurement on PTP Synchronization Timer Server

Please refer to the relevant parts in section 4.2.2.

2） Cable Symmetry Evaluation

Check the two fibers (including pigtail) of the two sites and take complete records accordingly. If necessary, measure the relative length of these two fibers (including pigtail) by using OTDR to make sure that they are of the same length, so as to be taken as reference in the asymmetric compensation later on.

3） Synchronization Performance Measurement on PTN Device


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The service information and time information transmit together in the PTN network. The IEEE1588 Time Analyzer provides 10/100M PTP synchronized Fiber/Copper ports. Select PTP (Slave) mode in the analyzer and receive the IEEE1588 data via Ethernet port of the PTN to analyze the time information. Or connect with 1PPS or 1PPS+TOD port directly and measure the time deviation. The connection diagram is shown in Fig 4-7.

Fig 4-7 Synchronization Performance Measurement on PTN Device and Base Station Besides, the BITS simulation in IEEE1588 Time Analyzer provides high-precision time source for the PTN device, and evaluate the IEEE155 synchronization performance.

4） Measurement & Evaluation on Optical Path Asymmetric and Protection Path Asymmetric Compensation

The synchronization mechanism of IEEE1588 is set up on basis of symmetric path. However, in the real network application, there are few cases of real symmetric path. Since the path is asymmetric, the PTN net cell, as slave clock, will have some certain delay after synchronization. Therefore, it is necessary to measure the delay caused by the asymmetric path on the engineering deployment accurately, so as to work out the compensation strategy in advance and perform asymmetric compensation through the PTN network management system. Currently compensation in sections is adopted, that is, to measure the delay of each device and compensate separately.

In the actual time test and delay adjustment, the delay value measured by the instrument in the past is not an exact value. In fact it oscillates back and forth in some certain range. That’s why it takes very long time to complete the measurement. IEEE1588 Time Analyzer adopts the analysis principle of Statistics and special algorithm, and provides quick measurement on the asymmetric compensation value of optical path, which guarentees that the value is relatively accurate and scientific, and can be taken as the practical


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reference in asymmetric compensation. The connection diagram is shown in Fig 4-7.

5） Synchroniztion Measurement on Base Station

Currently Synchronized Ethernet Technology and IEEE1588v2 are adopted to synchronize the time/frequency of PTN network. When prefoming measurements on synchronization system of Base Station, connect the input interface of time/frequency in the analyzer with output interface of time/frequency in Base Station devices to perform the time deviation, clock signal measurement and wander test to check the synchronization stability. The connection diagram is shown in Fig 4-7.

6） Synchronization Measurement on PTN System Protection Switching

APS（Automatic Protection Switching）is one big advantage of PTN network construction.

It is neccessary to verify the effect that PTN system protection switching put on the time/frequency signal. Also, it requires to verify the evaluation of protection path asymmetric compensation. The connection diagram is shown in Fig 4-8.

Fig 4-8 Synchronization Measurement on PTN System Protection Switching

IEEE1588 Time Analyzer 5 Functions & Specifications

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5. Functions & Specifications 5.1 Performance of Inner Reference Source

Reference Source Type Reference Signal Accuracy

PPS (Fixed GPS) 15ns OCXO

10MHz 1.16x10E(-12)/day

PPS(Fixed GPS) 30ns

10MHz 1x10E(-12)/100seconds

Less than 3x10E(-11)/monthRubidium Clock

PPS(Missed fixing GPS) Less than 40ns/hour（Room Temperature）

5.2 Measureable Signal Signal Type Electrical

Characteristics Interface Type

Measureable Time Signal

1PPS/ PP2S-TTL Level 3.3V LVTTL Level with rising

edge effective BNC Coaxial

1PPS/ PP2S-RS422 Output Swing 0~5V,

Transferred into TTL Level with rising edge effective

RJ45（CMCC）

1PPS+TOD-RS422 Output Swing 0~5V ,

Transferred into TTL Level with rising edge effective

RJ45（CMCC）

TOD CMCC RJ45（CMCC）

PTP V2 Copper(Slave) 10M/100M Adaptive RJ45

PTP V2 Fiber(Slave) 100M Optical Module SFP

Measureable Frequency/Wander Signal

2.048MHz-75Ω Comply with G.703 BNC Coaxial

2.048MHz-120Ω Comply with G.703 RJ45,with cable of RJ45

to Crocodile clips

2.048Mbits/s-75Ω Comply with G.703 BNC Coaxial

IEEE1588 Time Analyzer 5 Functions & Specifications

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2.048Mbits/s-120Ω Comply with G.703 RJ45,with cable of RJ45

to Crocodile clips

Ethernet Copper 10M/100M Adaptive RJ45

Ethernet Fiber 100M Optical Module SFP

5.3 Output Signal

Signal Type Interface Type

1PPS -TTL Level BNC Coaxial

1PPS+TOD-RS422 RJ45（CMCC）

PTP V2 Copper(Master) RJ45

PTP V2 Fiber(Master) SFP

2.048MHz-75Ω BNC Coaxial

2.048MHz-120Ω RJ45,with cable of RJ45 to Crocodile clips

2.048Mbits/s-75Ω BNC Coaxial

2.048Mbits/s-120Ω RJ45, with cable of RJ45 to Crocodile clips

5.4 Reference Source Input

Signal Type Interface Type

GPS-50Ω BNC Coaxial

2.048MHz-75Ω BNC Coaxial

2.048Mbits/s-75Ω BNC Coaxial

5.5 Measurement Accuracy

Signal Type Measurement Accuracy

Resolution

1pps/pp2s 50ns 0.01ns

PTP V2 50ns 0.01ns

2.048MHz/2.048Mbits/s ±0.5ppb 0.01ns

Ethetnet Clock ±1ppb 0.01ns

IEEE1588 Time Analyzer 6 Working with TestmanagerPro

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6. Working with TestManagerPro This chapter briefly describes the software functions, system configurations and running environment, install and uninstall the software on the PC and how to use TestManagerPro software.

6.1 Software Functions

6.2 System Configurations and Running Environment

6.3 Install and Uninstall the Software on the PC

6.4 How to Use TestManagerPro

6.1 Software Functions TestManagerPro communicates with instrument via U-disk or Ethernet port in PC. It supports uploading the stored data to PC from the instrument, viewing and printing the stored results. You can easily check, manage and analyze every test result on your PC. Another very important function of TestManagerPro is that you can upgrade the embedded software in the instrument with this PC software.

Basic functions of TestManagerPro: Select the type of the instrument.

Connect the instrument.

Upload the test results stored in the instrument.

View the stored results.

Analyze the stored results.

Clean up the uploaded records.

Print the test results with report format.

Upgrade the embedded software.

Outputting results in TXT or EXCEL files.

Help.

6.2 System Configurations and Running Environment 6.2.1 Firmware

Basic configurations required:

PC: 586/133MHz or above Memory：16MB or above

Hard disk：50MB or above CD-ROM drive for installation

Standard mouse and keyboard USB/Ethernet port

Windows-compatible printer Network interface card and cable


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6.2.2 Software

Operating system

Windows98/ME/2000/XP/NT

6.2.3 System Configuration Recommendation

System display mode: 800x600 Pixels

Install the printer before setup

6.3 Install and Uninstall the Software on the PC 6.3.1 Installation Process

Close all programs and turn off virus protection software to prevent installation

from system conflict;

Open the package and take out the CD disk with the mark of “TestManagerPro”;

Insert the CD into the CD-ROM drive;

View the contents of the CD from “My Computer”;

Double-click “Setup.exe”;

Complete the installation according the setup wizard;

After completing installation of the software, one short-cut icon “TestManagerPro”

will be placed on the desktop automatically;

Double-click the icon “TestManagerPro” to run the program.

6.3.2 Uninstall TestManagerPro From the “Start” menu, choose “Settings”;

Open “Control Panel”;

Click “Add/Remove Programs”;

Select “TestManagerPro” in the list;

Click “Change/Remove” button to remove the software automatically.

6.4 How to Use TestManagerPro 6.4.1 Connect the Instrument Please refer to chapter 2.4 for more details. Make sure the instrument is well connected to the PC and configure correct settings when using Ethernet port for communication.

6.4.2 TestManagerPro Software Operation Graphic windows help you operate TestManagerPro software simply and easily. You can work with TestManagerPro as shown in Fig 6-1TestManagerPro.


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Fig 6-1 TestManagerPro operation flow chart

Start

Double-click the icon of “TestManagerPro” to run the software. Enter into the main window of the program.

Successfully

Connect the instrument with PC by provided Network cable

Connect instrument

Yes

No Check if the PC can ping the instrument and also check if the system settings are correct;

Select functions

Upload records Upgrade embedded software

U-disk upload records

View records

Select records

View results of record Output results in EXCEL or TXT format

Print in form

View

uploaded records

Read data from instrument

Upload the records to PC from U-disk after outputting these results from instrument

Save the form as other format file

Load in upgrade file

Start upgrading

End

Exit from TestManagerPro

IEEE1588 Time Analyzer Appendix

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Appendix: Abbreviations 1PPS 1 Pulse Per Second

TOD Time Of Date

FCS Frame Check Sequence

PTP Precision Time Protocol

UDP User Datagram Protocol

E2E End-to-End

P2P Peer-to-Peer

GPS Global Positioning System

IP Internet Protocol

VLAN Virtual Local Area Network

TIE Time Interval Error

GMT Greenwich Mean Time

UTC Universal Time Coordinated

Documents

IEEE1588 Time Analyzer Contents - Tirumala Seven Hills ...€¦ · IEEE1588 Time Analyzer Contents ... like IEEE1588v2 time server, PTN/OTN/xPON etc, and base ... 40m GPS Antenna