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Symmetricom TimeSource 2700 Manual

Symmetricom TimeSource 2700 Manual

Cdma primary reference source
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TimeSource 2700
CDMA Primary Reference Source
097-73000-02
Issue 1

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  • Page 1 TimeSource 2700 CDMA Primary Reference Source 097-73000-02 Issue 1...
  • Page 2 2300 Orchard Parkway San Jose, CA 95131-1017 http://www.symmetricom.com Copyright © 1999 Symmetricom, Inc. All rights reserved. Printed in U.S.A. All product names, service marks, trademarks and registered trademarks used in this document are the proper ty of their respective owners.

  • Page 3: Table Of Contents

    Description Introduction ......Physical Description ....Chapter 1 Functional Description .
  • Page 4 (Optional) ..... . . Remote Operation via a Terminal Server (Optional)....TimeSource 2700...
  • Page 5 During Alarms ....View BT3 (TimeSource 2700) Mode and Duration ....
  • Page 6 Change Password ....View BTMONitor Software Version . . . View Communication Information ..View System Firmware Information . . . TimeSource 2700...
  • Page 7 Troubleshooting Front Panel Lamps ....Theory of Alarm Processing and Chapter 5 Troubleshooting ....CDMA Event and Alarm Summary .
  • Page 8 Sales....... Manual Updates ..... TimeSource 2700...
  • Page 9 Specifications Magnetic-Mount Antenna ..High-Gain Antenna ....Chapter 6 Remote Communication Port ..Craft Communication Port .

  • Page 10: Contents

    Acronyms and Abbreviations alarm indication signal BTMONitor BesTime Monitoring CDMA code division multiple access digital signal, level 1 (1.544 Mb/s) electrostatic discharge extended superframe Global Positioning System loss of signal MDEV mean time deviation microprocessor parts per billion parts per million primary reference source remote oscillator rack unit (1.75 inches)
  • Page 11 Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference. TimeSource 2700...
  • Page 12 TimeSource 2700...
  • Page 13 Chapter Description This chapter provides a physical and functional description of the TimeSource 2700.

  • Page 14: Introduction

    Introduction The TimeSource 2700 is a Primary Reference Source (PRS) that tracks and ensembles multiple CDMA pilot signals. The CDMA pilot signals originate from CDMA base stations equipped with GPS based timing sources traceable to UTC. A pilot channel is transmitted continuously by each CDMA base station.

  • Page 15: Physical Description

    Physical Description The TimeSource 2700 consists of a shelf, an antenna with a cable, mounting hardware, and software. The shelf can be mounted on a wall or in an industry-standard 19 inch or 23 inch rack. In a rack, the shelf occupies two rack units (RU).
  • Page 16 Figure Magnetic-Mount Antenna Receiving element SMA connector 12 ft Magnetic cable base TimeSource 2700...
  • Page 17 Figure High-Gain Antenna Antenna N connector Description...

  • Page 18: Functional Description

    Functional Description Overview Figure 3 shows the main functions of the TimeSource 2700. The center of the TimeSource 2700 is the BesTime Ensemble Timing Generator. The Ensemble Timing Generator can receive multiple timing references, analyze their phase and frequency characteristics, and dynamically weight each input, to maximize the stability and accuracy of the timing outputs.
  • Page 19 Figure TimeSource 2700 Block Diagram TL1 messages Alarm Alarm contacts Interface Status lamps Local computer with BTMONitor Remote computer with BTMONitor Antenna CDMA input Receiver Local Rb Output span A Oscillator Optional sources Ensemble Timing Output span B Generator T1 input...

  • Page 20: Antenna

    Antenna The CDMA antenna mounts inside the building within 12 feet of the TimeSource 2700 Shelf. A single cable transports the CDMA pilot signals to the shelf. CDMA Receiver The CDMA Receiver automatically and continuously tracks multiple 1930 MHz-to-1990 MHz PCS band CDMA pilot signals.

  • Page 21: Ensemble Timing Generator

    Ensemble Timing Generator The clock signals from the CDMA Receiver, a local oscillator, T1 span lines (optional), and 5 MHz remote oscillators (optional) are used as sources by the BesTime algorithms in the Ensemble Timing Generator. The signals are analyzed for MDEV, TDEV, and other phase and frequency characteristics.

  • Page 22: Btmonitor Software

    BTMONitor (BesTime Monitoring) is a Windows 95/98/NT compatible craft software program, which provides system configuration, alarms, and diagnostics. BTMONitor resides on a user-provided PC, and interfaces to the TimeSource 2700 Shelf via the local (Craft) or remote (Remote) RS-232 communication port. Alarm Interface The MPU delivers major and minor alarms to dry-contact type connections at the Alarms connector.
  • Page 23 Chapter Engineering & Ordering This chapter describes mounting configurations for the TimeSource 2700 Shelf, lists computer requirements for operating the TimeSource 2700, and lists parts included in the TimeSource 2700 System.

  • Page 24: Shelf Considerations

    5 inch offset mounting. Allow for two RUs (3-1/2 inches) of vertical space on the rack, per wire-wrap panel. Wall Mounted The TimeSource 2700 can be attached to a wall or other surface by ordering the appropriate wall-mount configuration option.

  • Page 25: Computer Requirements

    Computer Requirements A user-supplied computer is required to operate the TimeSource 2700 System. Minimum requirements are as follows: • Operating system: Windows 95, Windows 98, or Win- dows NT 4.0 • CPU: x486 or equivalent, at 33 MHz • RAM: 8 MB •...

  • Page 26: Systems

    The wire-wrap panel (990-73000-11) is available separately, as an option, for the rack-mounted TimeSource 2700. It includes the panel and cables for connecting to the TimeSource 2700, and hardware for mounting in a 19 inch or 23 inch rack. TimeSource 2700...
  • Page 27 Table A. TimeSource 2700 Parts Part Number Description Rack-Mount Shelf with Magnetic-Mount Antenna (990-73000-02) 090-73000-02 TimeSource 2700 Shelf 093-73010-01 Magnetic-mount antenna with 12 ft cable 093-73000-02 Hardware kit (mounting brackets [2 RU] and hardware for mounting in a 19 in. or 23 in. rack)
  • Page 28 Table A. TimeSource 2700 Parts (cont’d) Part Number Description Rack-Mount Shelf with High-Gain Antenna (990-73000-04) 090-73000-02 TimeSource 2700 Shelf 093-73010-02 High-gain antenna kit (includes 12 ft cable and mounting hardware) 093-73000-02 Hardware kit (mounting brackets [2 RU] and hardware for mounting in a 19 in.

  • Page 29: Installation

    Installation Chapter This chapter provides the steps required to install and power-up the TimeSource 2700.
  • Page 30 Unpacking Install the TimeSource 2700, using steps in the order given in this chapter. If any difficulties are encountered during the installation process, contact Symmetricom’s Customer Technical Assistance Center (CTAC) at: • 1 888 367 7966 (North America and other areas, where avail- able) •...

  • Page 31: Antenna Installation

    CDMA signal. Magnetic-Mount Antenna For TimeSource 2700 Systems with magnetic-mount antennas, use this section, and skip the “High-Gain Antenna” section. For TimeSource 2700 Systems with high-gain antennas, skip this section, and use the “High-Gain Antenna” section. Installation...

  • Page 32: High-Gain Antenna

    Keep the antenna away from magnetic-sensitive media (e.g., floppy or hard disks). Route the antenna cable to the rear of where the TimeSource 2700 Shelf will be located, and out of the way of traffic. Use tie-wraps or equivalent to dress the cable in accordance with office procedures.
  • Page 33 Attach the N end of the antenna cable to the antenna. Route the antenna cable to the rear of where the TimeSource 2700 Shelf will be located, and out of the way of traffic. Use tie-wraps or equivalent to dress the cable in accordance with office procedures.
  • Page 34 Figure 4. High-Gain Antenna Mounting Mounting bracket Antenna Washer and nut Washer and nut Cable runway N connector Clamp Antenna cable Washer and nut TimeSource 2700...

  • Page 35: Shelf Installation

    Shelf Installation Rack Mounting The mounting ears, as shown in Figure 5, can be positioned for flush or 5 inch offset mounting, in either a 19 inch rack (Figure 5A) or a 23 inch rack (Figure 5B). To mount the shelf, follow Procedure B.
  • Page 36 (Figur e6) to the rack just below the TimeSourc e2700. Connect the cables (included in the wire-wrap panel kit) between the front panel connectors of the TimeSource 2700 and the connectors on the inside of the wire-wrap panel, as listed in Table B.
  • Page 37 Figure 6. Rack Mounting with Wire-Wrap Panel Rack TimeSource 2700 Shelf front panel Wire-wrap pins Cables from front of shelf to Wire-wrap panel wire-wrap panel A. Side view TimeSource 2700 B. Front view Wire-wrap panel Installation...
  • Page 38 Table B. Cable Connections TimeSource 2700 Wire-Wrap Panel Cable Type Power A P1 PWR-A DB9 – 3-pin Molex Power B P2 PWR-B DB9 – 3-pin Molex Output Span A J3 OUTPUT A RJ-45 – 5-pin Molex Output Span B J4 OUTPUT B RJ-45 –...

  • Page 39: Wall Mounting

    Wall Mounting The TimeSource 2700 can be attached to a wall or other surface. Attach the proper mounting ears, included with the TimeSource 2700, as shown in Figure 7, then use appropriate screws (not included) to attach to the chosen surface.
  • Page 40 Input Output Alarms output span A, span B span A, span B Figure 9. Optional Wire-Wrap Panel Rear Panel Connectors 5 MHz input Power B Power A Input Output Alarms span A, span B span A, span B TimeSource 2700...

  • Page 41: Power And Frame Ground

    Power and Frame Ground Caution: Ensure the fuses in the fuse panel which will be used to power the TimeSource 2700 Shelf are removed before connecting power. Note: Input power is reverse polarity protected; there are no user replaceable fuses.
  • Page 42 • Strip enough insulation from the ground wire from the DB9 connector to permit three complete turns around the 6 AWG rod, and solder. Note: When soldering, use a 25 watt soldering iron to ensure the 6 AWG rod is heated sufficiently, to prevent a cold solder connection. TimeSource 2700...
  • Page 43 Without ground rod: Crimp an appropriate-sized spade lug to the wire from pin 6 of the DB9 connector, and secure the lug to a screw hole on the rack. Remove the paint, and sand the area around the screw hole, to ensure proper conductivity. Wire-Wrap Rear Panel 48 volt dc battery and frame ground enter through the –...
  • Page 44 Crimp an appropriate-sized spade lug to the wire from terminal F of the terminal block, and secure the lug to a screw hole on the rack. Remove the paint, and sand the area around the screw hole, to ensure proper conductivity. TimeSource 2700...

  • Page 45: Output Span (A, B)

    Output Span (A, B) Shelf Front Panel Connect the T1 outputs to the two RJ45 connectors labeled Output Span A and Span B. Figure 8 shows the location of the connectors on the front panel, and Table E lists the pinouts of each connector (Output Span A and Span B).
  • Page 46 OUTPUT DS1-A and DS1-B. Table F shows the location of the connectors on the wire-wrap panel, and Table F lists the pins of each connector (OUTPUT DS1-A and DS1-B). Table F. Wire-Wrap Panel T1 Output Connector Pinouts Signal Name Ring Frame ground TimeSource 2700...

  • Page 47: Craft

    Note: TL1 messages are available only via the Craft port. Make a direct connection to the TimeSource 2700 communication port at the RJ45 connector labeled Craft. Figure 8 shows the location of the connector on the shelf front panel, and Table G lists the pinouts of the connector.

  • Page 48: Remote

    Table H lists the pinouts of the connector. Table H. Remote RS-232 Connector Pinouts Signal Abbreviation Direction Data carrier detect To TimeSource 2700 Receive data To TimeSource 2700 Transmit data From TimeSource 2700 Data terminal ready From TimeSource 2700 Return/signal ground —...

  • Page 49: Alarms

    Alarms Shelf Front Panel The RJ45 connector labeled Alarms provides dry-contact relay closure points. The relay contacts are normally open, and close when reporting an alarm. Figure 8 shows the location of the connector on the front panel. Connect between the Major pins for a major alarm, and between the Minor pins for a minor alarm.

  • Page 50: Input Span (A, B)

    Grounding the shield at both ends is not recommended. Table J. Front Panel T1 and 5 MHz Connector Pinouts Signal Ring 3, 4 5 MHz (positive) 5, 6 5 MHz (negative) Frame ground Frame ground Note: Pins not listed are reserved for future use. TimeSource 2700...
  • Page 51 Wire-Wrap Panel Connect the optional T1 inputs to the two wire-wrap connectors labeled INPUT DS1-A and DS1-B. Figure 9 shows the location of the connectors on the wire-wrap panel, and Table K lists the pinouts of each connector. Note: The T1 signal shield is normally grounded only at the signal source.

  • Page 52: 10 Mhz Output

    Figure 8 shows the connector location on the shelf front panel. CDMA Antenna Connect the cable from the CDMA antenna to the SMA connector labeled CDMA RF IN. Figure 10 shows the connector location on the shelf rear panel. Figure 10. Shelf Rear Panel Connector CDMA antenna TimeSource 2700...

  • Page 53: Power-Up

    Connect the supplied serial communications cable between the TimeSourc e2700 Craft connector and a serial communications port on the computer. Install fuses in the fuse panel that powers the TimeSource 2700. On the front panel, when the Minor Alarm lamp is yellow, and the Locked lamp is blinking green, continue.
  • Page 54 • Automatic Selection, Scan COM Ports. This selection will scan the serial communications ports on the host computer for the communications port connected to the TimeSource 2700, when the OK button is clicked. • Manual Selection: Allows the user to enter or choose the host computer communication port that is connected to the TimeSource 2700.
  • Page 55 Note: If a dialog box appears stating, “Failed to Open COM Port” instead of the User Login screen, verify that the TimeSource 2700 is powered, and the serial communications are connected. Then click OK, and repeat Steps 7 and 8.
  • Page 56 Enter the user name and password for this installation, then click the OK button. A screen appears showing the version number, copyright date, and the serial port that communicates with the TimeSource 2700 (shown below). Notes: 1. The user name, “default1”, is set at the factory, and the password, “TS2700:”, is set at the factory.
  • Page 57 Procedure C. Power-Up (cont’d) Step Action Verify the correct version number and serial port, then click the OK button. The BTMONitor main screen appears (shown below). Installation...
  • Page 58 The Installation screen appears (shown below). In the Location ID area: Enter two to eight alphanumeric characters for the TimeSource 2700 identification. The identification name can be used to identify this particular TimeSource 2700 among multiple TimeSource 2700 systems. Caution: Use the factory-set name, or enter a name.
  • Page 59 Procedure C. Power-Up (cont’d) Step Action Select Performance Statistics from the main screen, then select CDMA Summary, as shown below. The CDMA Summary Report screen appears (shown below). Installation...
  • Page 60 The system is factory-set to Auto Search for pilot channels on power up. Observe the Lock display for each pilot. Any number other than 0 indicates the TimeSource 2700 has detected, and locked onto, an acceptable pilot signal(s). Lock is required for only one pilot for the system to produce PRS outputs.

  • Page 61: Remote Operation Via A Modem (Optional)

    Action Connect a straight-through serial communications cable (user supplied) between the TimeSource 2700 Remote connector and serial communications port on the modem, and verify all links between the modem and the host computer are connected. From the BTMONitor main screen, click Exit.
  • Page 62 The profile.dat file contains up to 10 communication profiles. A communication profile contains modem settings, including a phone number, for communicating with a TimeSource 2700 System. Instructions for creating a modem profile follow this paragraph. The profile.dat file can be copied, and renamed, using standard Windows procedures (do not change the dat file extension).
  • Page 63 Procedure D. Installing BTMONitor Using a Modem (cont’d) Step Action Click the Open button. If the file has not yet been created, a dialog box appears (shown below) that asks to create the file profile.dat. If the file has been created, the Comm. Profile Edit screen appears (shown in Step 6).
  • Page 64 In the TS Name box, change the name of the modem profile, if desired. The TS name should reflect the name of the TimeSource 2700 Shelf to which the profile connects. Check that the Comm Port window displays the communication port that is connected to the modem, and that the Modem button is selected.
  • Page 65 Procedure D. Installing BTMONitor Using a Modem (cont’d) Step Action Click OK. BTMONitor is now set up to communicate with the TimeSource 2700 via the modem. The Comm. Profile Edit screen appears. If desired, repeat Steps 7 through 14 to create another modem profile.

  • Page 66: Remote Operation Via A Terminal Server (Optional)

    (Optional) Use Procedure E to set up communications between BTMONitor and the TimeSource 2700 via a terminal server. This allows the user to select and/or edit the terminal server number and the terminal server port number, to allow the TimeSource 2700 to communicate with the host computer via an LAN network.
  • Page 67 Procedure E. Remote Operation via a Terminal Server Step Action From the BTMONitor main screen, click Exit. Open the BTMONitor application. The COMM Port Selection screen appears. Click Use TCP/IP. Click the TCP/IP option, on the left of the menu bar. Select or edit a terminal server and TCP/IP address by clicking one of the following: •...
  • Page 68 Action In the Address/Port area of the Select IP Address screen (see below), highlight the desired terminal server address and port, then click Use (the Use button will display the selected address and port). Skip to Step 11. TimeSource 2700...
  • Page 69 Procedure E. Remote Operation via a Terminal Server (cont’d) Step Action In the Address/Port area of the Edit IP Address screen (see below), highlight the terminal server address and port to be edited, then click Edit Address (the Edit Address button will change to Copy to List).
  • Page 70 Select. b. Highlight the desired terminal server address and port, then click Use. Click OK. Enter the user name and password for this installation, then click OK. Verify the correct version number and serial port, then click OK. TimeSource 2700...
  • Page 71 Operation This chapter provides tasks which may be required to operate the TimeSource 2700. Chapter...

  • Page 72: Introduction

    Introduction The following pages have tasks which may be required to operate the TimeSource 2700. Items not called out in windows are for factory use only. TimeSource 2700...
  • Page 73 View Alarms and Alarm Thresholds In the main menu, click Status. Click Alarm Monitor. View the LEDs to determine the status of the inputs. On CDMA: • Green indicates locked. • Yellow indicates not locked. • Red indicates warm-up. On Span A, Span B, ROA, and ROB: •...
  • Page 74 Threshold displays the amount of time a minor alarm exists before escalating to a major alarm. CDMA, Span A, Span B, Rmt Osc A, and Rmt Osc display the amount of time an item has been in minor alarm. TimeSource 2700...
  • Page 75 Change Alarm Thresholds In the main menu, click Status. Click Alarm Monitor. Click the up and down arrows to set the alarm threshold. This sets the amount of time a minor alarm exists before becoming a major alarm. For CDMA inputs, this also sets the amount of time from the beginning of bridging mode to escalation to a minor alarm.
  • Page 76 Change Alarm Thresholds (cont’d) Click to save the alarm threshold settings. TimeSource 2700...
  • Page 77 View Output Framing and Output During Alarms In the main menu, click Status. Click Alarm Monitor. View the span line output, and trouble code sent during an alarm. Note: Span Output displays the output settings only. It does not indicate real-time activity or the current state of the outputs.

  • Page 78: View Bt3 (Timesource 2700) Mode And Duration

    View BT3 (TimeSource 2700) Mode and Duration In the main menu, click Status. Click Alarm Monitor. View the current BT3 (TimeSource 2700) mode, and the amount of time the unit has been in that mode. The TimeSource 2700 will be in one of four modes: CDMA normal, bridging, holdover, or warm-up.

  • Page 79: View Alarm Log

    View Alarm Log In the main menu, click Status. Click Alarm Log Display. View the most recent 512 alarms and events. Refer to the Troubleshooting chapter for a list of all possible messages that may appear in the log. Click to update the log information.

  • Page 80: Set Location Id

    Set Location ID In the main menu, click Configuration. Click Installation. Type in the TimeSource 2700 identification. The identification must be from two to eight alphanumeric characters. The identification name can be used to identify this particular TimeSource 2700 System among multiple TimeSource 2700 Systems.

  • Page 81: Enable Inputs

    Enable Inputs In the main menu, click Configuration. Highlight Provision, and select Inputs. Click any of the input source(s) to enable (provision) monitoring of an input. Caution: It is not required to select an input. If an input is not used, do not select;...

  • Page 82: Ensemble Inputs

    Note: An input must be enabled (provisioned) before it can be ensembled. Click to restore the factory settings. Click OK to save the ensembling selections, or click Cancel to ignore any changed information. TimeSource 2700...

  • Page 83: View Input Weighting And Gear

    View the stage (gear) in the time calculation process. Gears 1, 2, and 3 are warm-up processes after power-up. Gears 4, 5, and 6 indicate a settling period when the TimeSource 2700 outputs Stratum 1 signals. Gear 7 indicates steady-state operation. Operation...

  • Page 84: View Input Performance Statistics

    View the accumulation period for the data. View the statistics data, which is the report of the measurement difference between the provisioned inputs and the TimeSource 2700 output. This data can be plotted and compared against any one of several timing performance masks, to gauge the quality of the timing being received on the input(s).
  • Page 85 View Input Performance Statistics (cont’d) Set the log file to contain phase data. Data from the screen is written to the file at every screen update. The log file may be opened and read during the logging process, however, the log file is read-only during the logging process.

  • Page 86: Set Output Format And Output During

    For ESF output format, select one of the following alarm methods: AIS on Error, Squelch on Error, or SSM. Note: If SSM is selected, select one of the following: STU, ST2, ST3, or DUS. The recommended setting is either STU or ST2. TimeSource 2700...
  • Page 87 Forced mode may also be useful in applications where the outputs generated by the TimeSource 2700, even in major alarm, may be better than the alternative (e.g., offices without additional holdover clocks in a distribution shelf).

  • Page 88: View Cdma Tracking Statistics

    24 hours of operation after power- View the number of minutes the TimeSource 2700 has been locked during the last 24 hours. View the percentage of the last 24 hours that the TimeSource 2700 was locked to at least one CDMA pilot.

  • Page 89: View Cdma Pilot Information

    Performance Statistics. Click CDMA Summary. View information about each CDMA pilot signal currently being tracked. • Pilot: TimeSource 2700 channel pilot number. The TimeSource 2700 may display data for multi- ple channels for each pilot signal received. The actual number of...
  • Page 90 Weighting assignments are dynamically adjusted for changes in pilot signal quality. • Lock: Number of seconds since the TimeSource 2700 acquired lock on the pilot channel (count stops at 10,000). Zero indicates the system is not locked to the pilot channel.
  • Page 91 View CDMA Pilot Information (cont’d) View the number of pilot signals currently being tracked. Click to start or stop the log file for this screen. Data from the screen is written to the file every 60 seconds while the box is checked. The log file may be opened and read during the logging process;...

  • Page 92: Select Pilot Signal Channel

    Select one of the bands or Auto Search. Caution: If unsure of the proper band and frequency for the area where the TimeSource 2700 is located, select Auto Search. If a band was selected, select a channel. Note: After 20 minutes, if the...

  • Page 93: View Daily Holdover Information

    View Daily Holdover Information Note: The System Admin drop- down menu and its selections are only available to the Administrator level of security. In the main menu, click System Admin. Highlight Holdover Information, and select Daily. Click Select. Highlight Display, then select the desired input, to see the data for selected input.
  • Page 94 View the drift, in parts per billion per day, predicted for this input during the current 24 hour period. View the predicted error in ns. This error can be held for up to 24 hours if the TimeSource 2700 goes into holdover. TimeSource 2700...

  • Page 95: View Monthly Holdover Information

    View Monthly Holdover Information In the main menu, click System Admin. Highlight Holdover Information, and select Monthly. Click Select. Highlight Display, then select the desired input, to see the data for the selected input. View the data of the 4 day time period.
  • Page 96 The log file may be opened and read during the logging process; however, the log file is read-only during the logging process. The log file is written in a comma-delimited (.csv) data format. TimeSource 2700...

  • Page 97: (Cont'd)

    Reset CDMA Receiver and System In the main menu, click System Admin. Click Reset. Click to reset the CDMA receiver processor, and restart the pilot signal search. Click to reset the system processor. Caution: Selecting Reset CDMA, Restart BesTime, and clicking RESET, will cause a disruption in service.

  • Page 98: Download New Software

    Notes: a. New software should not be downloaded over a modem connection. Use a direct connection only. b. The TimeSource 2700 does not lose data during a software download/upgrade. c. The TimeSource 2700 enters bridging mode during the software loading process, and...
  • Page 99 Click Continue. A progress bar and messages track the download process. Once the download is complete, a message appears. Click The TimeSource 2700 breaks, then reestablishes, communication with the host computer, and a message appears. Click OK. When the BTMONitor main screen appears, click Exit to exit the application.

  • Page 100: View User Accounts

    View User Accounts In the main menu, click System Admin. Click Security. View the list of system users and their privilege levels. The privilege levels are Administration, Management, Reporting, and None. Click OK or Exit to exit. TimeSource 2700...

  • Page 101: Add User Account

    Add User Account In the main menu, click System Admin. Click Security. Click Add User. Type in a name for the new user account. No two users can have the same name. The name must have three or more characters. Operation...
  • Page 102 • Reporting: Allows a user to dis- play, but not change, the opera- tional parameters of the system. • None: Disables all privileges of a user, while keeping the user information. TimeSource 2700...
  • Page 103 Add User Account (cont’d) Type in the password for the new user account in both of the Password windows. A user name cannot be in the user’s password. The password must be from six to eight characters, must include at least one alphabetic and one numeric character, and must contain at least one of the following special characters: ! “...

  • Page 104: Delete User Account

    Delete User Account In the main menu, click System Admin. Click Security. Click Delete User. Select the user account to be deleted. Click OK to save the information, or click Exit to ignore any changed information. TimeSource 2700...

  • Page 105: Edit User Account

    Edit User Account In the main menu, click System Admin. Click Security. Click Edit User. Select the user account to be edited. Type in a new name for the user account. No two users can have the same name. The name must have three or more characters.
  • Page 106 ! “ # $ % & ‘ ( ) * + , – . / : ; < = > ? @ Click OK to save the information, or click Exit to ignore any changed information. TimeSource 2700...

  • Page 107: Change Password

    Change Password In the main menu, click Configuration. Click Change Password. Type in the user name for this system (factory-set to default1). Type in the user password for this system (factory-set to TS2700:). Type in the new password. The password must be from six to eight characters, must include at least one alphabetic and one numeric character, and must...

  • Page 108: View Btmonitor Software Version

    View BTMONitor Software Version In the main menu, click Help. Click About BTMon. View the BTMONitor software version. Click OK to exit. TimeSource 2700...

  • Page 109: View Communication Information

    View Communication Information In the main menu, click Help. Click About BTMon. View the active communication port. Click OK to exit. Operation...

  • Page 110: View System Firmware Information

    View System Firmware Information In the main menu, click Help. Click Firmware Build Information. View the system firmware information. Click to exit. TimeSource 2700...
  • Page 111 Troubleshooting This chapter provides descriptions of the TimeSource 2700 front-panel lamps, alarms and events, and TL1 messages, and how to troubleshoot them. It also describes how to return equipment, get technical and/or sales assistance, and obtain manual updates. Chapter...

  • Page 112: Front Panel Lamps

    Front Panel Lamps All front panel lamps are shown in Figure 11. The lamps are described in Table M. Figure 11. Front Panel Indicators Holdover Major Minor Locked TimeSource 2700...
  • Page 113 Table M. Lamp Descriptions Lamp Status Description Action Holdover System is not in holdover None Yellow System is in holdover Refer to the Alarm Monitor screen Major System is not in major alarm None System is in major alarm Refer to the Alarm Monitor screen Minor System is not in minor alarm...

  • Page 114: Theory Of Alarm Processing And Troubleshooting

    The following pages describe the theory behind how events and alarms are processed, and how to troubleshoot the system, based on the event and alarm messages. Refer to Figur e12 for the Alarm Monitor screen, which may be referenced during the descriptions on the following pages. TimeSource 2700...
  • Page 115 Figure 12. Alarm Monitor Screen Troubleshooting...
  • Page 116 The TimeSource 2700 provides a rich content of information about system events and alarms, which is logged and reported to the user, via front panel lamps, alarm relays, the BTMONitor Alarm Monitor and Alarm Log Display screens, and TL1 messages. The Alarm Monitor screen displays all active events and alarms, for monitoring the functionality and operation of the system.
  • Page 117 Otherwise, it is likely the condition is transient, will clear on its own, and will have had no impact on the quality of the timing outputs. The TimeSource 2700 reports transient events, events, and alarms for the critical subsystems and inputs listed below: • CDMA •...
  • Page 118 Remote Osc B RO Drift Transient Event Tevt-Drift Remote Osc A or Remote Osc B RO Drift Alarm Alm-Drift Remote Osc A or Remote Osc B RO Phase Transient Event Tevt-Phase Remote Osc A or Remote Osc B TimeSource 2700...
  • Page 119 Local Osc Temp TP Slew Alarm Alm-Slew Local Osc Temp Following are alarm and event condition descriptions for each of the five TimeSource 2700 input or critical internal subsystems, for monitoring and troubleshooting the operation of the TimeSource 2700 System. Troubleshooting...

  • Page 120: Cdma Event And Alarm Summary

    It is normal to expect frequent CDMA transient event activity, depending on the antenna location. When a transient event escalates to an event, the TimeSource 2700 enters bridging mode, and operates on its predictors, but will not report a minor or major alarm.

  • Page 121: Cdma Frequency Transient Event

    CDMA Frequency Transient Event The CDMA receiver performs a complete update of the current time (clock bias) every 2 seconds. The TimeSource 2700 compares the current frequency estimate of the corrected local oscillator, with respect to CDMA, and declares a CDMA Frequency Event, if the magnitude of the offset is greater than the threshold of 0.02 ppm.

  • Page 122: Cdma Time Accuracy Transient Event

    Note: If the TimeSource 2700 suddenly stops tracking pilots, and does not reacquire any pilots for 4 hours or more, reset the CDMA receiver (using the Reset screen, click Reset CDMA, then OK). If the condition persists, replace the shelf.

  • Page 123: Span Input Event And Alarm Summary

    Span Input Event and Alarm Summary The TimeSource 2700 reports and escalates transient events, and events on any provisioned, but not ensembled, span line. Events on span lines not used in the BesTime output ensemble never escalate to an alarm, because the span line is not being used to generate the timing outputs.

  • Page 124: Span Frequency Alarm

    The drift event will be triggered by SONET pointer adjustments, and other network rearrangement-related transient events. This permits these transients to be detected and removed before they impact the system. The TimeSource 2700 checks for drift events every 4 seconds. Maintenance action required - None.

  • Page 125: Span Drift Alarm

    Span Drift Alarm Span drift event data is processed through a leaky-bucket alarm manager, to control escalation to an event, or directly to a minor alarm. Since occasional drift events are typical, the leaky bucket is set to ignore isolated pointer and network rearrangement events. The nominal time to escalate to an alarm is 4 minutes, and the maximum time to retire the alarm is 2.5 minutes.

  • Page 126: Span Phase Alarm

    Troubleshoot the source of the timing for the incoming span line, or contact the span line service provider. If the alarm persists, replace the cable. TimeSource 2700...

  • Page 127: Remote Oscillator (Ro) Input Event And Alarm Summary

    Remote Oscillator (RO) Input Event and Alarm Summary The TimeSource 2700 reports and escalates transient events, and events on any remote oscillator input that is provisioned, but not ensembled. Events on remote oscillator inputs not used in the BesTime output ensemble never escalate to an alarm, because the remote oscillator inputs are not being used to generate the timing outputs.

  • Page 128: Ro Frequency Alarm

    RO Drift Transient Event The relative difference is measured between the input frequency and the current output frequency of the TimeSource 2700. The input frequency is smoothed, using an input smoothing filter. The threshold for this category is selected to detect and remove transients above the normal operating range of a remote oscillator.

  • Page 129: Ro Drift Alarm

    RO Drift Alarm RO drift transient event data is processed through a leaky-bucket alarm manager, to control escalation to an event or an alarm. Normally, drift alarms should not occur on remote oscillator inputs. The nominal time to report is 45 seconds, and the maximum time to retire is 7.5 minutes.

  • Page 130: Ro Phase Alarm

    RO Jitter Alarm The TimeSource 2700 measures jitter on the Remote Oscillator input with a resolution of 470 ps. If the peak-to-peak delta phase error exceeds the 12 ns threshold for a period of 100 ms, an input jitter alarm is declared.

  • Page 131: Phase Lock Loop (Pll) Event And Alarm Summary

    Phase Lock Loop (PLL) Event and Alarm Summary The PLL events and alarms report activity associated with the 60 MHz synthesizer PLL subsystem. In general, PLL alarms indicate a potential critical hardware fault in the system. Any alarm is immediately treated as a minor alarm. If a PLL alarm occurs with simultaneous alarm activity on all provisioned inputs, a major alarm is reported.

  • Page 132: Pll Step Alarm

    PLL Range Event The range event category is used to report individual 250 ms samples that exceed the normal varactor range limits. The limits are at 90 percent of the total control range. Maintenance action required - None. TimeSource 2700...

  • Page 133: Pll Range Alarm

    PLL Range Alarm A range event should not occur in a normally operating system after the first minute from a cold power-up. The PLL range event is processed through a leaky-bucket alarm manager, to control escalation to a minor alarm. The leaky-bucket manager is set so that a single isolated event will not escalate to an alarm.

  • Page 134: Temperature (Tp) Event And Alarm Summary

    The nominal time to escalate to an alarm is 900 ms. The maximum time to retire an alarm is 20 seconds. Maintenance action required - If the system is not in warm-up, replace the shelf. TimeSource 2700...

  • Page 135: Tp Slew Event

    7 minutes. The maximum time to retire an alarm is 10 minutes. Maintenance action required: 1. Determine if the TimeSource 2700 Shelf is being exposed to an unusual amount of air flow variation (for example, the shelf is located next to a heating vent). If yes, reposition the shelf.

  • Page 136: Tl1 Messages

    TL1 Messages The TimeSource 2700 sends out two types of TL1 messages via the Craft communication port: alarms and events. The format of each of these are described below. Formats Alarms Alarms are sent out as Report Alarm messages in the following format: <cr>...

  • Page 137: Parameters

    Parameters The parameters used in the alarm and event messages are defined in Table P. Table P. Parameter Definitions Parameter Definitions This parameter is the access identifier which is the equipment reporting the condition. almcode This parameter is the alarm code which identifies the severity of the alarm. If multi- ple alarms are reported, the value for almcde is the highest severity of those reported.
  • Page 138 This parameter is the time an event occurred. This parameter is the source identifier (site ID). It identifies the system sending the message and is the equipment’s CLLI code. The sid is the same as the location on the Installation screen. TimeSource 2700...

  • Page 139: Message Troubleshooting

    Table P. Parameter Definitions (cont’d) Parameter Definitions srveff This parameter identifies how the condition affects service. Valid values are: = service affecting NSA = not service affecting time This parameter is the current time in the 6-digit form hh-mm-ss where hh is hours (0–23), mm is minutes (0–59), and ss is seconds (0–59).
  • Page 140 CDMA ERROR The CDMA receiver is 1. Check the cable connections reporting an error. between TimeSource 2700 Shelf and antenna. 2. If the error repeats, replace antenna. RO x ERROR An error has been detected Troubleshoot the specified remote on the specified remote oscillator input (check signal frequency).
  • Page 141 TimeSource 2700 environmental specifications. If not, correct the ambient temperature with heating or air conditioning. 2. If the ambient air temperature is within the TimeSource 2700 environmental specifications, replace the system. EVENTS DOWNLOAD The software download has Retry the software download.
  • Page 142 TEMPERATURE A temperature error has been Check that the ambient air temperature ERROR detected on the internal is within the TimeSource 2700 oscillator. environmental specifications. If not, correct the ambient temperature with heating or air conditioning. TimeSource 2700...

  • Page 143: Returning Equipment

    To return defective or damaged equipment, follow Procedure F. Repaired equipment is typically shipped within 30 days of receipt by Symmetricom, or per contract terms. Shipping costs to Symmetricom are paid by the customer; shipping costs back to the customer are paid by Symmetricom. Troubleshooting...
  • Page 144 Procedure F. Returning Equipment Step Action Call Symmetricom’s Customer Technical Assistance Center at one of the following numbers to obtain a Return Material Authorization (RMA) number and shipping address: From inside the U.S., call 888-367-7966 From outside the U.S., call 408-433-0910 Note: Retain the RMA number for future reference.

  • Page 145: Technical Assistance

    Technical Assistance For technical assistance, call one of the following: • From inside the U.S., call 888-367-7966. • From outside the U.S., call: Your local distributor 408-428-7907 (U.S.) Troubleshooting...

  • Page 146: Sales

    Sales For sales assistance, contact the following: Symmetricom 2300 Orchard Parkway San Jose, CA 95131-1017 Phone: 888-367-7966 Fax: 408-428-7998 Internet: http://www.symmetricom.com TimeSource 2700...

  • Page 147: Manual Updates

    After downloading, the manual can be viewed on a computer or printed out. To register for access to the manual update site via the internet, send an e-mail to “manuals@symmetricom.com” with the following information: • Name •...
  • Page 148 TimeSource 2700...

  • Page 149: Specifications

    Chapter Specifications This chapter provides the specifications of the TimeSource 2700.

  • Page 150: Magnetic-Mount Antenna

    High-Gain Antenna Gain: 6 dBil Frequency 1850 to 1990 MHz Connector : N female Dimensions: Outer diameter : 1.25 in. Height: 18.75 in. Weight: 0.5 lb Cable Length: 12 ft Cable Type: LMR-240 with SMA and N connectors TimeSource 2700...

  • Page 151: Remote Communication Port

    Remote Communication Port Connector Type: 9-pin, female DB9 connector Connector Label: Remote RS-232 Connector Location: Front panel Electrical Interface: RS-232 Baud Rate: 1200 bps 2400 bps 4800 bps 9600 bps 19.2 kbps 38.4 kbps Craft Communication Port Connector Type: RJ-45 Connector Label: Craft Connector Location:...

  • Page 152: T1 Inputs

    Alternate mark inversion (AMI) Signal Level: 1.5 V to 4.5 V base to peak (terminated) 0.15 V to 0.45 V base to peak (bridged) Framing: ESF (auto carrier detect) AIS and LOS conditions detected Jitter Tolerance: Meets Bellcore GR-1244 requirements TimeSource 2700...

  • Page 153: Mhz Inputs

    5 MHz Inputs Connector Type: RJ-45 Connector Label: Input (Span A and Span B) Connector Location: Front panel Ω Impedance: Frequency: 5 MHz Format: RS-422 Ω Voltage: Nominally ±1 V differential into 100 Specifications...

  • Page 154: T1 Outputs

    Ω Impedance: Format: Payload: All ones Line Code: Alternate mark inversion (AMI) Ω Pulse Amplitude: 2.4 V to 3.6 V terminated into 100 base to peak Framing: D4 or ESF Transmission During Alarms: SSM (ESF only) Squelch Forced TimeSource 2700...

  • Page 155: Mhz Output

    10 MHz Output Connector Type: Connector Label: 10 MHz Output Connector Location: Front panel Frequency: 10 MHz Ω Impedance: Format: Sine wave Amplitude: 13 dBm ±2 dBm Harmonic Spurious: Less than 60 dBc – Phase Noise: (referenced at 10 MHz) 120 dBc @ 100 Hz –...

  • Page 156: Alarms

    Major alarm Minor : Open when not powered, open when powered and not in Minor alarm, closed when powered and in Minor alarm Indicators Labels: Holdover Major Minor Locked Type: Light emitting diode (LED) TimeSource 2700...

  • Page 157: Power

    Power Connectors: Male DB9 (both) Connector Labels: Power A, Power B Voltage: –36 V dc to –60 V dc (each connector) Current: 1.8 A cold start at 36 V – 600 mA standard operation <70 W Start Up Power: Steady State Power : (25 °C) 27 W Fuse for Battery Feed: (Recommended)

  • Page 158: Wire-Wrap Panel Mechanical

    17.1 in. Height: 3.5 in. Depth: 6.75 in. Weight: 1 lb Environmental Operating Temperature: 0 °C to + 50 °C Operating Humidity: 5 % to 85 % RH Electromagnetic Compliance: FCC Part 15, Sub Par t B, Class A TimeSource 2700...

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