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Symmetricom TimeSource 2500 Manual

Symmetricom TimeSource 2500 Manual

Gps primary reference source
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TimeSource 2500
GPS Primary Reference Source
097-71000-02
Issue 3

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  • Page 1 TimeSource 2500 GPS Primary Reference Source 097-71000-02 Issue 3...
  • Page 2 2300 Orchard Parkway San Jose, CA 95131-1017 http://www.symmetricom.com Copyright © 1999–2000 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 ......Global Positioning System ... . Chapter 1 Physical Description .
  • Page 4 Computer Requirements ... . Systems ......TimeSource 2500...
  • Page 5 Installation Unpacking ......Antenna ......Chapter 3 Window Antenna Installation .
  • Page 6 Sent During Major Alarm ..View BT3 (TimeSource 2500) Mode and Duration ....
  • Page 7 Operation Set TOD Output Format ... . View GPS Tracking Statistics ..Chapter 4 (cont’d) View GPS Satellite Information ..View Daily Holdover Information .
  • Page 8 RO Phase Transient Event ..RO Phase Alarm ....RO Jitter Alarm ....TimeSource 2500...
  • Page 9 Troubleshooting Phase Locked Loop (PLL) Event and Alarm Summary ... Chapter 5 PLL Step Event ....(cont’d) PLL Step Alarm .
  • Page 10 Shelf Mechanical ....Wire-Wrap Panel Mechanical ..Shelf and Wire-Wrap Panel Environmental ....TimeSource 2500...

  • Page 11: Contents

    Acronyms and Abbreviations 1 pps one pulse per second alarm indication signal BITS building integrated timing supply BTMONitor BesTime Monitoring digital signal, level 1 (1.544 Mb/s) electrostatic discharge extended superframe Global Positioning System loss of signal MDEV mean time deviation microprocessor Network Time Protocol parts per billion...

  • Page 12: Timesource

    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 2500...

  • Page 13: Description

    Chapter Description This chapter provides an overview of the global positioning system, and a physical and functional description of the TimeSource 2500.

  • Page 14: Introduction

    The synchronization timing is traceable to the GPS, which provides the highest level of synchronization for telephony networks. The TimeSource 2500, with its GPS input, is a stand- alone PRS which meets network PRS performance specifications. The system is an ideal alternative to cesium systems for providing Stratum 1 timing to an office BITS system, or as a timing system for network edge and customer premises equipment.

  • Page 15: Global Positioning System

    The TimeSource 2500 optimizes timing performance during frequent GPS outages by anticipating the outages, and compensating for them with advanced local oscillator and holdover technology.

  • Page 16: Physical Description

    Physical Description The TimeSource 2500 consists of a shelf, antenna, cables, 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 17 Figure 2. Wall Antenna Antenna Mounting Bracket Antenna Description...

  • Page 18: Functional Description

    Functional Description Overview Figure 3 shows the main functions of the TimeSource 2500. The center of the TimeSource 2500 is the BesTime Ensemble Timing Generator. The BesTime 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 2500 Block Diagram TL1 Messages Alarm Alarm Contacts Interface Status Lamps Local Computer with BTMONitor Software Remote Computer with BTMONitor 12 V dc power Software to antenna Receiver Antenna input Output Span A Local Oscillator Optional BesTime sources...

  • Page 20: Antenna

    The miniature GPS window antenna is packaged specifically for mounting on the inside of a window within the building housing the TimeSource 2500 Shelf, or on a wall outside the building. A single cable transports GPS satellite signals to the shelf, and provides 12 volts dc power from the shelf to the antenna assembly.

  • Page 21: Power Supply

    Power Supply A power converter filters and converts 48 volt dc power supplied – to the shelf into the voltages required by the shelf. Dual power feeds are supplied through the Power A and B connectors. BesTime Ensemble Timing Generator The clock signals from the GPS Receiver, local oscillator, optional T1 span lines, and optional 5 MHz remote oscillators are used as sources by the BesTime algorithms in the Ensemble Timing...

  • Page 22: Tod Output

    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 2500 Shelf via the local (Craft) RJ-45 or remote (Remote) RS-232 communication port.
  • Page 23 Chapter Engineering & Ordering This chapter provides antenna installation guidelines, shelf mounting configurations, computer requirements, and parts lists.

  • Page 24: Antenna Location Guidelines

    The processor inside the GPS receiver processes every piece of the sky, whether it is blocked or not. If unproductive parts of the sky are masked from the processor’s view, the processing time is reduced, and the timing solution can be achieved more quickly. TimeSource 2500...
  • Page 25 (Figure 4) and make a note of it. The mask angle, in degrees, will be entered during the initial setup. Note: TimeSource 2500 does not detect satellites in the masked area. Figure 4. Antenna Mask Angle 10° mask angle*...

  • Page 26: Cabling Considerations

    Window Antenna For TimeSource 2500 Systems with window antennas, use this section, and skip the “Wall Antenna” section. For TimeSource 2500 Systems with wall antennas, skip this section, and use the “Wall Antenna”...

  • Page 27: Up To 40 Feet

    093-71316-04. Figure 5. Window Antenna-to-Shelf Connection with Cable Kit 093-71316-04 SMA Connector Antenna (Attached to cable) 090-71010-87 RG-316 Cable Clip(s) 128-00315-01 RG-316 Cable (40 ft) 060-00062-02 SMA Connector SMA-to-TNC Adapter 121-00563-01 (Attached to cable) TimeSource 2500 090-71000-02 Engineering & Ordering...

  • Page 28: Antenna-To-Shelf Distance Up To 100 Feet

    RG-316 Cable (10 ft) (Attached to cable) 060-00062-01 Mounting Bracket (attach to wall adjacent to window) TNC Connector 070-00379-01 (Attached to cable) with TNC-to-SMA Adapter 121-00562-01 LMR-240 Cable (100 ft) 060-00063-01 TNC Connector (Attached to cable) TimeSource 2500 090-71000-02 TimeSource 2500...

  • Page 29: Antenna-To-Shelf Distance Up To 150 Feet

    N-to-SMA Adapter 121-00560-01 LMR-400 Cable (150 ft) 060-31000-15 N Connector (Attached to cable) Mounting Bracket N Connector 070-00379-02 with N-to-N Adapter (Attached to cable) 121-00548-01 LMR-240 Cable (6 ft) TNC Connector 060-00048-01 (Attached to cable) TimeSource 2500 090-71000-02 Engineering & Ordering...

  • Page 30: Antenna-To-Shelf Distance Up To 200 Feet

    N-to-SMA Adapter 121-00560-01 LMR-400 Cable (200 ft) 060-31000-20 N Connector (Attached to cable) Mounting Bracket 070-00379-02 N Connector with N-to-N Adapter (Attached to cable) 121-00548-01 LMR-240 Cable (6 ft) TNC Connector 060-00048-01 (Attached to cable) TimeSource 2500 090-71000-02 TimeSource 2500...

  • Page 31: Wall Antenna

    Wall Antenna For TimeSource 2500 Systems with wall antennas, use this section. For TimeSource 2500 Systems with window antennas, use the “Window Antenna” section. Antenna-to-Shelf Distance Up to 40 Feet Figure 9 shows antenna-to-shelf cabling when the total length of the cable route is 40 feet or less.
  • Page 32 (Attached to cable) Cable Mounting Bracket SMA Connector (Attach to inside wall) (Attached to cable) 070-00379-02 with N-to-SMA Adapter (121-00560-01) RG-316 Cable (40 ft) 060-00062-02 RG-316 Cable Clip(s) 128-00315-01 SMA Connector TNC-to-SMA Adapter (Attached to cable) 121-00563-01 TimeSource 2500 090-71000-02 TimeSource 2500...

  • Page 33: Antenna-To-Shelf Distance Up To 100 Feet

    060-00048-01 090-71010-89 N Connector (Attached to cable) Cable Mounting Bracket TNC Connector (Attach to inside wall) (Attached to cable) 070-00379-02 with N-to-TNC Adapter (121-00566-01) LMR-240 Cable (100 ft) 060-00063-01 TNC Connector (Attached to cable) TimeSource 2500 090-71000-02 Engineering & Ordering...

  • Page 34: Antenna-To-Shelf Distance Up To 150 Feet

    N-to-N Adapter 121-00548-01 LMR-400 Cable (150 ft) 060-31000-15 N Connector (Attached to cable) Cable Mounting Bracket 070-379-02 N Connector with N-to-N Adapter (Attached to cable) 121-00548-01 LMR-240 Cable (6 ft) 060-00048-01 TNC Connector (Attached to cable) TimeSource 2500 090-71000-02 TimeSource 2500...

  • Page 35: Antenna-To-Shelf Distance Up To 200 Feet

    121-00548-01 LMR-400 Cable (200 ft) 060-31000-20 N Connector (Attached to cable) Cable Mounting Bracket 070-00379-02 N Connector with N-to-N Adapter (Attached to cable) 121-00548-01 LMR-240 Cable (6 ft) 060-00048-01 TNC Connector (Attached to cable) TimeSource 2500 090-71000-02 Engineering & Ordering...

  • Page 36: Shelf Considerations

    Shelf Considerations Rack Mounted The TimeSource 2500 Shelf can be mounted in either a 19 inch or 23 inch rack. Supplied mounting ears can be positioned for flush or 5 inch offset mounting. Allow for two RUs (3-1/2 inches) of vertical space on the rack, per shelf.

  • Page 37: Computer Requirements

    Computer Requirements A user-supplied computer is required to operate the TimeSource 2500 System. Minimum requirements are as follows: • Operating system: Windows 95, Windows 98, or Windows NT 4.0 • CPU: x486 or equivalent, at 33 MHz • RAM: 8 MB •...

  • Page 38: Systems

    Systems Table A lists the parts included in TimeSource 2500 Systems which have window antennas. Table B lists the parts included in TimeSource 2500 Systems which have wall antennas. Both tables list parts included in TimeSource 2500 Systems with rack- mounted or wall-mounted shelves.
  • Page 39 Table A. Parts Used with Window Antenna Installations Part Number Description Rack-Mount Shelf (990-71000-02) 090-71000-02 TimeSource 2500 Shelf 090-71010-87 Window antenna kit 093-71000-02 Hardware kit (mounting brackets [2 RU] and hardware for mounting in a 19 in. or 23 in. rack)
  • Page 40 6 ft of LMR-240 cable (TNC and N male connectors attached) 070-00379-02 Mounting bracket (2) to support cable transitions 121-00548-01 Connector adapter (N female to N female) 121-00560-01 Connector adapter (SMA female to N female) 128-00315-01 Adhesive-backed clips (4) TimeSource 2500...
  • Page 41 Table A. Parts Used with Window Antenna Installations (cont’d) Part Number Description 200 ft Cable Kit (093-71400-20) 060-31000-20 200 ft of LMR-400 cable (N connectors attached) 060-00062-01 10 ft of RG-316 cable (SMA male connectors attached) 060-00048-01 6 ft of LMR-240 cable (TNC and N male connectors attached) 070-00379-02 Mounting bracket (2) to support cable transitions 121-00548-01...
  • Page 42 Table B. Parts Used with Wall Antenna Installations Part Number Description Rack-Mount Shelf (990-71000-04) 090-71000-02 TimeSource 2500 Shelf 090-71010-89 Wall antenna kit 093-71000-02 Hardware kit (mounting brackets [2 RU] and hardware for mounting in a 19 in. or 23 in. rack)
  • Page 43 Table B. Parts Used with Wall Antenna Installations (cont’d) Part Number Description 40 ft Cable Kit (093-71317-04) 060-00062-02 40 ft of RG-316 cable (SMA connectors attached) 121-00563-01 Connector adapter (SMA female to TNC male) 060-00048-01 6 ft of LMR-240 cable (TNC and N male connectors attached) 121-00560-01 Connector adapter (N female to SMA female) 128-00315-01...
  • Page 44 200 ft Cable Kit (093-71401-20) 060-31000-20 200 ft of LMR-400 cable (N connectors attached) 060-00048-01 6 ft of LMR-240 cable (2) (TNC and N male connectors attached) 121-00548-01 Connector adapter (2) (N female to N female) 070-00379-02 Mounting bracket (2) TimeSource 2500...

  • Page 45: Installation

    Installation Chapter This chapter provides the steps required for installation and power-up.

  • Page 46: Unpacking

    Unpacking Install the TimeSource 2500, 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). Refer to the Technical Assistance section of the Troubleshooting chapter for telephone numbers.

  • Page 47: Antenna

    Installation procedures are to follow local company procedures and the Installation Job Specification. Window Antenna Installation For TimeSource 2500 Systems with window antennas, use this section, and skip the “Wall Antenna Installation” section. For TimeSource 2500 Systems with through-the-wall antennas, skip this section, and use the “Wall Antenna Installation”...

  • Page 48: Antenna Cabling

    Attach the other end of the cable to the SMA end of the SMA-to-TNC adapter. Route the cable to the rear of where the TimeSource 2500 Shelf will be installed. Secure the cable, using the adhesive-backed clip(s), so that no more than 10 ft of cable is left unsupported.
  • Page 49 Figure 13. Window Antenna-to-Shelf Connection with Cable Kit 093-71316-04 SMA Connector Antenna (Attached to cable) 090-71010-87 RG-316 Cable Clip(s) 128-00315-01 RG-316 Cable (40 ft) 060-00062-02 SMA Connector SMA-to-TNC Adapter 121-00563-01 (Attached to cable) TimeSource 2500 090-71000-02 Installation...
  • Page 50 Attach one end of the LMR-240 cable to the TNC end of the adapter installed in Step 2. Route the LMR-240 cable to the rear of where the TimeSource 2500 Shelf will be installed. Secure the RG-316 cable, using the adhesive-backed clip(s), so that no more than 10 ft of cable is left unsupported.
  • Page 51 RG-316 Cable (10 ft) (Attached to cable) 060-00062-01 Mounting Bracket (attach to wall adjacent to window) TNC Connector 070-00379-01 (Attached to cable) with TNC-to-SMA Adapter 121-00562-01 LMR-240 Cable (100 ft) 060-00063-01 TNC Connector (Attached to cable) TimeSource 2500 090-71000-02 Installation...
  • Page 52 To install the cables when the total length of the cable route is between 150 feet and 200 feet, use cable kit 093-71400-20, follow Procedure D, and refer to Figure 16. Figure 16 shows the window antenna-to-shelf cabling for this configuration. TimeSource 2500...
  • Page 53 Attach the N end of the LMR-240 cable to the other side of the adapter installed in Step 4. Route the LMR-240 cable to the rear of where the TimeSource 2500 Shelf will be installed. Secure the RG-316 cable, using the adhesive-backed clip(s), so that no more than 10 ft of cable is left unsupported.
  • Page 54 N-to-SMA Adapter 121-00560-01 LMR-400 Cable (150 ft) 060-31000-15 N Connector (Attached to cable) Mounting Bracket N Connector 070-00379-02 with N-to-N Adapter (Attached to cable) 121-00548-01 LMR-240 Cable (6 ft) TNC Connector 060-00048-01 (Attached to cable) TimeSource 2500 090-71000-02 TimeSource 2500...
  • Page 55 N-to-SMA Adapter 121-00560-01 LMR-400 Cable (200 ft) 060-31000-20 N Connector (Attached to cable) Mounting Bracket 070-00379-02 N Connector with N-to-N Adapter (Attached to cable) 121-00548-01 LMR-240 Cable (6 ft) TNC Connector 060-00048-01 (Attached to cable) TimeSource 2500 090-71000-02 Installation...

  • Page 56: Wall Antenna Installation

    Wall Antenna Installation For TimeSource 2500 Systems with wall antennas, use this section. For TimeSource 2500 Systems with window antennas, use the “Window Antenna Installation” section. Antenna Mounting To mount the antenna through the wall, refer to Figures 17 and 18, and follow Procedure E.
  • Page 57 Figure 17. Hole Spacing 2 in. Bracket mounting holes (2) 3.375 in. Cabling hole Installation...
  • Page 58 Figure 18. Wall Antenna Mounting Holes for bolts/screws Bracket Cable Washer TNC Connector Hole for cable Gasket Antenna Outside building Inside building TimeSource 2500...

  • Page 59: Antenna Cabling

    Attach the other end of the RG-316 cable to the SMA end of the TNC-to-SMA adapter. Route the RG-316 cable to the rear of where the TimeSource 2500 Shelf will be installed. Secure the RG-316 cable, using the adhesive-backed clip(s), so that no more than 10 ft of cable is left unsupported.
  • Page 60 (Attached to cable) Cable Mounting Bracket SMA Connector (Attach to inside wall) (Attached to cable) 070-00379-02 with N-to-SMA Adapter (121-00560-01) RG-316 Cable (40 ft) 060-00062-02 RG-316 Cable Clip(s) 128-00315-01 SMA Connector TNC-to-SMA Adapter (Attached to cable) 121-00563-01 TimeSource 2500 090-71000-02 TimeSource 2500...
  • Page 61 Attach the N end of the 6 ft LMR-240 cable to the adapter installed in Step 2. Attach one end of the 100 ft LMR-240 cable to the TNC end of the adapter installed in Step 2. Route the 100 ft LMR-240 cable to the rear of where the TimeSource 2500 Shelf will be installed. Installation...
  • Page 62 Antenna 060-00048-01 090-71010-89 N Connector (Attached to cable) Cable Mounting Bracket TNC Connector (Attach to inside wall) (Attached to cable) 070-00379-02 with N-to-TNC Adapter (121-00566-01) LMR-240 Cable (100 ft) 060-00063-01 TNC Connector (Attached to cable) TimeSource 2500 090-71000-02 TimeSource 2500...
  • Page 63 Install one of the N-to-N adapters in the adapter bracket installed in Step 1. For a wall-mounted shelf, install the other N-to-N adapter bracket to a wall within 6 ft of the TimeSource 2500 Shelf, using user-supplied bolts or screws. For a rack-mounted shelf, the other N-to-N adapter mounting bracket may be mounted to the rack instead of the wall.
  • Page 64 Connect the other end of the LMR-400 cable to the adapter installed in Step 4. Attach the N end of the other LMR-240 cable to the other side of the adapter installed in Step 4. Route the same LMR-240 cable to the rear of where the TimeSource 2500 Shelf will be installed. TimeSource 2500...
  • Page 65 N-to-N Adapter 121-00548-01 LMR-400 Cable (150 ft) 060-31000-15 N Connector (Attached to cable) Cable Mounting Bracket 070-379-02 N Connector with N-to-N Adapter (Attached to cable) 121-00548-01 LMR-240 Cable (6 ft) 060-00048-01 TNC Connector (Attached to cable) TimeSource 2500 090-71000-02 Installation...
  • Page 66 N-to-N Adapter 121-00548-01 LMR-400 Cable (200 ft) 060-31000-20 N Connector (Attached to cable) Cable Mounting Bracket 070-00379-02 N Connector with N-to-N Adapter (Attached to cable) 121-00548-01 LMR-240 Cable (6 ft) 060-00048-01 TNC Connector (Attached to cable) TimeSource 2500 090-71000-02 TimeSource 2500...

  • Page 67: Shelf

    Shelf Rack Mounting The mounting ears, as shown in Figure 23, can be positioned for flush or 5 inch offset mounting, in either a 19 inch rack (Figure 23A) or a 23 inch rack (Figure 23B). To mount the shelf, follow Procedure I.
  • Page 68 If a wire-wrap panel is not used, this procedure is completed. If using a wire-wrap panel, mount the panel (Figure 24) to the rack just below the TimeSource 2500. Connect the cables (included in the wire-wrap panel kit) between the front panel connectors of the TimeSource 2500 and the connectors on the inside of the wire- wrap panel, as listed in Table C.
  • Page 69 Figure 24. Rack Mounting with Wire-Wrap Panel Rack TimeSource 2500 Shelf front panel Wire-Wrap Pins Cables from front of shelf to Wire-Wrap Panel wire-wrap panel A. Side View TimeSource 2500 Wire-Wrap Panel B. Front View Installation...
  • Page 70 Table C. Cable Connections TimeSource 2500 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 71: Wall Mounting

    Wall Mounting The TimeSource 2500 can be attached to a wall or other surface. Attach the proper mounting ears, included with the TimeSource 2500, as shown in Figure 25, then use appropriate screws (not included) to attach to the chosen surface.
  • Page 72 T1 and 5 MHz Inputs T1 Outputs Output Outputs (A and B) (A and B) Figure 27. Wire-Wrap Rear Panel Connectors 5 MHz Inputs Power B Power A T1 Outputs T1 Inputs Alarm (A and B) (A and B) Outputs TimeSource 2500...

  • Page 73: Frame Ground

    Frame Ground Shelf Front Panel Frame ground enters through the Power A and Power B connectors. These are nine-pin male DB9 connectors. Refer to Figure 26 for the location of the connectors. The pinouts in the connectors are listed in Table D. Ensure the frame ground wires are long enough to go from the shelf front panel to the frame ground connection.
  • Page 74 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. TimeSource 2500...
  • Page 75 Wire-Wrap Rear Panel Frame ground enters through the PWR-A and PWR-B terminal blocks. Refer to Figure 27 for the location of the terminal blocks. The terminals in the terminal blocks are listed in Table E. Ensure the frame ground wires are long enough to go from the wire-wrap panel to the frame ground connection.
  • Page 76 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 2500...

  • Page 77: Power

    Table D, then connect to the Power A and Power B connectors on the front panel. Connect the power leads from pins 1 and 2 to the office battery source, but do not apply the office battery to the TimeSource 2500 at this time. Installation...
  • Page 78 Connect the power wires to the terminals listed in Table E, using appropriate sized spade lugs. Connect the leads from the – and + terminals to the office battery source, but do not apply the office battery to the TimeSource 2500 at this time. TimeSource 2500...

  • Page 79: T1 Outputs

    T1 Outputs Shelf Front Panel Connect the T1 outputs to the two RJ45 connectors labeled Output Span A and Span B. Figure 26 shows the location of the connectors. The pinouts of each of the connectors (Output Span A and Span B) are listed in Table F. Note: The shield is normally grounded only at the signal source.
  • Page 80 OUTPUT DS1-A and DS1-B. Table G shows the location of the connectors. The pinouts of each of the connectors (OUTPUT DS1-A and DS1-B) are listed in Table G. Table G. Wire-Wrap Panel T1 Output Connector Pinouts Signal Name Ring Frame ground TimeSource 2500...

  • Page 81: Local Communication Port

    Local Communication Port Make a direct connection to the TimeSource 2500 communication port at the RJ45 connector labeled Craft. Figure 26 shows the location of the connector. The pinouts of the connector are listed in Table H. Note: TL1 messages are available only via the Craft port.

  • Page 82: Alarm Outputs

    Figure 27 shows the location of the connectors. Connect between the MAJ connector + and – pins for a major alarm, and between the MIN connector + and – pins for a minor alarm. TimeSource 2500...

  • Page 83: Remote Communication Port

    Table J. Table J. Remote Communication Port Connector Pinouts Signal Abbreviation Direction Data carrier detect To TimeSource 2500 Receive data To TimeSource 2500 Transmit data From TimeSource 2500 Data terminal ready From TimeSource 2500 Return/signal ground —...

  • Page 84: T1 And 5 Mhz Inputs

    Grounding the shield at both ends is not recommended. Table K. Front Panel T1 and 5 MHz Input Connector Pinouts Signal Ring 5 MHz (positive) 5 MHz (negative) Frame ground Frame ground Note: Pins not listed are reserved for future use. TimeSource 2500...
  • Page 85 Wire-Wrap Panel Connect the optional T1 inputs to the two wire-wrap connectors labeled INPUT DS1-A and DS1-B. Figure 27 shows the location of the connectors. The pinouts of each of the connectors are listed in Table L. Note: The shield is normally grounded only at the signal source. Grounding the shield at both ends is not recommended.

  • Page 86: Time Of Day Output

    Table N. TOD Output Connector Pinouts Signal 1 pps output (positive) Return for external 20 V NL TXA output (positive) 1 pps output (negative) External 20 V NL TXA output (negative) Note: Pins not listed are reserved for future use. TimeSource 2500...

  • Page 87: 10 Mhz Output

    10 MHz Output Connect a BNC connector from the connector labeled 10MHz Output to the equipment that will use the 10 MHz output signal. Refer to Figure 26 for the connector location. GPS Antenna Connect the cable from the GPS antenna to the TNC connector labeled GPS RF In.

  • Page 88: Power-Up

    Connect the supplied serial communications cable between the TimeSource 2500 Craft connector and a serial communications port on the computer. Install fuses in the fuse panel that powers the TimeSource 2500. On the front panel, when the Minor Alarm lamp is yellow, and the Locked lamp is blinking green, continue.
  • Page 89 • Automatic Selection, Scan COM Ports. This selection will scan the serial communi- cations ports on the host computer for the communications port connected to the TimeSource 2500, when the OK button is clicked. • Manual Selection: Allows the user to enter or choose the host computer commu- nication port that is connected to the TimeSource 2500.
  • Page 90 If a dialog box appears stating, “Failed to Open COM Port” instead of the User Login screen, verify that the TimeSource 2500 is powered, and the serial com- munications are connected. Then click OK, and repeat Steps 7 and 8.
  • Page 91 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 2500 (shown below). Notes: 1. The user name, “default1”, is set at the factory, and the password, “TS2500:”, is set at the factory.
  • Page 92 Procedure J. 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). TimeSource 2500...
  • Page 93 Procedure J. Power Up (cont’d) Step Action Select Configuration from the main screen, then select Installation, as shown below. Note: Factory settings are shown for Latitude, Altitude, Longitude, Location ID, Ele- vation Mask, and Cable Delay. Installation...
  • Page 94 Step Action In the Latitude area: Enter the latitude of the TimeSource 2500 location. The latitude must be accurate to within 1/8 mi. Type, or use the up and down arrows on the side of each data entry box, to enter the degrees and minutes; the seconds must be entered using the up and down arrows only.
  • Page 95 Greenwich meridian, and E for longitudes east of the Greenwich meridian. In the Altitude area: Enter the altitude of the TimeSource 2500 in feet. Type, or use the up and down arrows on the left side of this data entry box. Use the adjacent Ref.
  • Page 96 Type or use the up and down arrows on the right side of the data entry box. Total Cable Antenna Type Cable Kit Part No. Length (ft) Delay (ns) Window 093-71316-04 Wall 093-71317-04 Window 093-71240-10 Wall 093-71241-10 Window 093-71400-15 Wall 093-71401-15 Window 093-71400-20 Wall 093-71401-20 TimeSource 2500...
  • Page 97 Windows File Save dialog box (shown below). Note: Saving the Installation screen information to a file may be useful for reinitializ- ing the TimeSource 2500 if the unit loses critical memory or is taken out of service. Installation...
  • Page 98 Choose a folder in the file system of your computer, enter a unique filename, and click the Open button. Wait until the TimeSource 2500 front panel Locked lamp is lit green (steady), and all other lamps are off. (The system normally takes about 1 h to warm up, but may take up to 8 h to warm up, depending on the antenna location and other site-dependent specifics.)

  • Page 99: Remote Operation Via A Modem (Optional)

    Step Action Connect a straight-through serial communications cable (user supplied) between the TimeSource 2500 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 100 The profile.dat file contains up to 10 communication profiles. A communica- tion profile contains modem settings, including phone number, for communicating with a TimeSource 2500 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 101 Procedure K. 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.
  • Page 102 If an accurate profile exists, go to Step 16. In the TS Name box, change the name of the modem profile, if desired. The TS name should reflect the name of the TimeSource 2500 Shelf to which the profile connects.
  • Page 103 Profile Edit screen, and closes the profile.dat file. A confirmation screen appears (shown below). Click OK. BTMONitor is now set up to communicate with the TimeSource 2500 via the modem. The Comm. Profile Edit screen appears. If desired, repeat Steps 7 through 14 to create another modem profile.

  • Page 104: Remote Operation Via A Terminal Server (Optional)

    (Optional) Use Procedure L to set up communications between BTMONitor and the TimeSource 2500 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 2500 to communicate with the host computer via an LAN network.
  • Page 105 Procedure L. 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 106 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 2500...
  • Page 107 Procedure L. 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). Type the address number, press the tab key, then type the port number.
  • Page 108 To select the terminal server address and port just edited, perform the follow- ing: a. Click the TCP/IP option, on the left of the Comm Port Select screen menu bar, then click Select. b. Highlight the desired terminal server address and port, then click Use. TimeSource 2500...
  • Page 109 Procedure L. Remote Operation via a Terminal Server (cont’d) Step Action 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. Installation...
  • Page 110 TimeSource 2500...

  • Page 111: Operation

    Operation This chapter provides tasks which may be required to operate the TimeSource 2500. Chapter...

  • Page 112: Introduction

    Introduction The following pages have tasks which may be required to operate the TimeSource 2500. The System Admin menu functions are only available to the administrator level of security. TimeSource 2500...

  • Page 113: View Alarms And Alarm Thresholds

    View Alarms and Alarm Thresholds Select Status > Alarm Monitor. To determine the status of the GPS input, view the GPS LED: • Green: indicates locked. • Yellow: indicates not locked. • Red: indicates warm-up. To determine the status of the span and remote oscillator inputs, view the Span A, Span B, ROA, and ROB LEDs:...
  • Page 114 Threshold shows the amount of time a minor alarm exists before escalating to a major alarm. GPS, Span A, Span B, Rmt Osc A, and Rmt Osc show the amount of time an item has been in minor alarm. TimeSource 2500...

  • Page 115: Change Alarm Thresholds

    Change Alarm Thresholds Select Status > Alarm Monitor. To set the amount of time a minor alarm exists before becoming a major alarm, use the Hrs. and Mins. up and down arrows. For GPS inputs, this also sets the amount of time from the beginning of bridging mode to escalation to a minor alarm.
  • Page 116 Change Alarm Thresholds (cont’d) To save the alarm threshold settings, click OK. TimeSource 2500...

  • Page 117: View Span Framing And Trouble Code Sent During Major Alarm

    View Span Framing and Trouble Code Sent During Major Alarm Select Status > Alarm Monitor. View the framing type and trouble code that will be sent on Span A and B during a major alarm. Note: Span Output does not indicate real-time activity or the current state of the outputs.

  • Page 118: View Bt3 (Timesource 2500) Mode And Duration

    View BT3 (TimeSource 2500) Mode and Duration Select Status > Alarm Monitor. View the current BT3 (TimeSource 2500) mode, and the amount of time the unit has been in that mode. The TimeSource 2500 will be in one of four modes: •...

  • Page 119: View Alarm Log

    View Alarm Log Select Status > Alarm Log Display. View the most recent 512 alarms and events. Minor alarms are highlighted yellow, major alarms are highlighted red, and cleared alarms and power-up information are highlighted green. Refer to the Troubleshooting chapter for a list of messages that may appear in the log.

  • Page 120: Clear Alarm Log

    Clear Alarm Log Select System Admin > Reset. To clear the alarm log in the Alarm Log Display screen, select Reset Flash Alarm Log Data. To reset the selected item, click RESET. To ignore any information, click Cancel. TimeSource 2500...

  • Page 121: Change Location Id

    Change Location ID Select Configuration > Installation. Type in the TimeSource 2500 identification. The identification must be from two to eight alphanumeric characters. The identification name can be used to identify this particular TimeSource 2500 System among multiple TimeSource 2500 Systems.

  • Page 122: Change Elevation Mask

    Elevation Mask(deg) arrow keys. To save the information on this screen to the TimeSource 2500, click Save to TimeSource. To save the contents of the screen to a file, click Save to File.

  • Page 123: Enable Or Disable Inputs

    Enable or Disable Inputs Select Configuration > Provision > Inputs. To enable (provision) or disable monitoring of an input, select or de-select any of the input source(s). Caution: Do not select an unused input, otherwise, spurious alarms will be generated. Note: An input must be provisioned before it can be...

  • Page 124: Ensemble Inputs Or Exclude Inputs From Ensemble

    Note: An input must be enabled (provisioned) before it can be ensembled. To restore the factory settings, select Restore Defaults. To save the ensembling selections, click OK. To ignore any changed information, click Cancel. TimeSource 2500...

  • Page 125: View Input Weighting And Gear

    View Input Weighting and Gear Select Performance Statistics > System Loop Statistics. View the weight given to each input for BesTime ensembling computation. 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 2500 outputs Stratum 1 signals.

  • Page 126: View Input Performance Statistics

    View the statistics data, which is the report of the measurement difference between the provisioned inputs and the TimeSource 2500 output. This data can be plotted and compared against any one of several timing performance...
  • Page 127 View Input Performance Statistics (cont’d) To include phase data in the log file, select Phase. 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 128: Set Span Framing And Trouble Code Sent During Major Alarm

    – DUS: Do not use for syn- chronization Notes: a. If SSM is selected, the recommended setting is either STU or ST2. b. SSM messages communicate to downstream network elements the timing performance received on an incoming signal. TimeSource 2500...
  • Page 129 Forced mode may be useful for testing and troubleshooting. Forced mode may also be useful in applications where the outputs generated by the TimeSource 2500, even in major alarm, may be better than the alternative (e.g., offices without additional holdover clocks in a distribution shelf).

  • Page 130: Set Tod Output Format

    Set TOD Output Format Select Configuration > Time of Day Output. To set the desired TOD output format, select NTP Type 4, Cisco Format, or None. Note: If None is selected, TOD will be disabled. TimeSource 2500...

  • Page 131: View Gps Tracking Statistics

    24 hours of operation after power- View the number of minutes the TimeSource 2500 has been locked during the last 24 hours. View the percentage of the last 24 hours that the TimeSource 2500 was locked to at least one satellite.

  • Page 132: View Gps Satellite Information

    • Azimuth: position of the sat- ellite in degrees clockwise from true north. • Lock: Number of seconds since the TimeSource 2500 acquired lock on the satellite (count stops at 2500). Zero indicates the system is not locked to the satellite.

  • Page 133: Operation

    View the GPS receiver system mode of operation, as determined by the system. Time XFR indicates four or more satellites are in view of the TimeSource 2500. No Fix indicates less than four satellites are in view of the TimeSource 2500. Operation...

  • Page 134: View Daily Holdover Information

    The time is indicated as hours of a 24 hour clock. View the average measured frequency offset during the 4 hour period, in parts per billion (ppb). View the predicted frequency offset during the 4 hour period, in parts per billion (ppb). TimeSource 2500...
  • Page 135 View Daily Holdover Information (cont’d) To start or stop the log file for this screen, select or de-select Log Data To File. Data from the screen is written to the file at every screen update while the box is checked. The log file may be opened and read during the logging process;...

  • Page 136: View Monthly Holdover Information

    The time is indicated as days of a 30 day month. View the average measured frequency offset during the 4 day period, in parts per billion (ppb). View the average predicted time error during the 4 day period, in nanoseconds (ns). TimeSource 2500...
  • Page 137 View Monthly Holdover Information (cont’d) View which input is being measured. To start or stop the log file for this screen, select or de-select Log Data To File. Data from the screen is written to the file at every screen update while the box is checked.

  • Page 138: Reset Gps Receiver And System

    Installation screen, select Reset GPS, Restart BesTime & Clr Critical Memory. Caution: This will cause a disruption in service. To reset the selected item, click RESET. To ignore any information, click Cancel. TimeSource 2500...

  • Page 139: Download New Software

    Notes: a. New software should not be downloaded over a modem connection. Use a direct connection only. b. The TimeSource 2500 does not lose data during a software download/upgrade. c. The TimeSource 2500 enters bridging mode during the software loading process, and...
  • Page 140 A progress bar and messages track the download process. Once the download is complete, a message appears. Click The TimeSource 2500 breaks, then reestablishes, communication with the host computer, and a message appears. Click OK. To exit the application, click Exit when the BTMONitor main screen appears.

  • Page 141: View User Accounts

    View User Accounts Select System Admin > Security. View the list of system users and their privilege levels: • Administration: Allows a user to change any parameter or function. • Manage: Allows a user to view and change any parame- ter or function except: restart the system, download new firmware, and manage user...

  • Page 142: Add User Account

    Add User Account Select System Admin > Security. Select Add User. Type in a name for the new user account. No two users can have the same name. The name must have three to eight characters. TimeSource 2500...
  • Page 143 Add User Account (cont’d) To select the privilege level for the new user account, use the UPC pull-down arrow: • Administration: Allows a user to change any parameter or function. • Manage: Allows a user to view and change any parame- ter or function except: restart the system, download new firmware, and manage user...
  • Page 144 ! “ # $ % & ‘ ( ) * + , – . / : ; < = > ? @ To save the information to the TimeSource 2500, click OK. To ignore any changed information, click Exit.

  • Page 145: Delete User Account

    Delete User Account Select System Admin > Security. Select Delete User. Select the user account to be deleted. To save the information, click OK. To ignore any changed information, click Exit. Operation...

  • Page 146: Edit User Account

    If desired, type in a new name for the user account. No two users can have the same name. The name must have three to eight characters. To select the new privilege level for the user account (if desired), use the UPC pull-down arrow. TimeSource 2500...
  • Page 147 Edit User Account (cont’d) If desired, type in the new password for the 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...

  • Page 148: Change Password

    ! “ # $ % & ‘ ( ) * + , – . / : ; < = > ? Type in the new password again. To save the information, click OK. To ignore any changed information, click Cancel. TimeSource 2500...

  • Page 149: View Btmonitor Software Version

    View BTMONitor Software Version Select Help > About BTMon. View the BTMONitor software version. To exit, click OK. Operation...

  • Page 150: View Communication Information

    View Communication Information Select Help > About BTMon. View the active communication port. To exit, click OK. TimeSource 2500...

  • Page 151: View System Firmware Information

    View System Firmware Information Select Help > Firmware Build Information. View the system firmware information. To exit, click Exit. Operation...
  • Page 152 TimeSource 2500...

  • Page 153: Troubleshooting

    Troubleshooting This chapter provides troubleshooting information using front-panel lamps, alarms, and events. It also describes how to return equipment, get technical and sales assistance, and obtain manual updates. Chapter...

  • Page 154: Front Panel Lamps

    Front Panel Lamps All front panel lamps are shown in Figure 29. The lamps are described in Table O. Figure 29. Front Panel Indicators Holdover Major Minor Locked TimeSource 2500...
  • Page 155 Table O. 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 156: Chapter 5 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 Figure 30 for the Alarm Monitor screen, which may be referenced during the descriptions on the following pages. TimeSource 2500...
  • Page 157 Figure 30. Alarm Monitor Screen Troubleshooting...
  • Page 158 Alarm Log Display screen displays the past 512 events, and alarm history. The TimeSource 2500 reports two types of events: transient events and events. A transient event is an intermittent or short-term non- service-affecting condition outside the normal operating conditions in an input or critical internal subsystem.
  • Page 159 For example, the TimeSource 2500 is designed to output PRS quality signals without any view of GPS satellites for as long as 14 hours on average per day.
  • Page 160 Antenna Alarm Span A or Span B Tevt-Freq Span Frequency Transient Event Alm-Freq Span Frequency Alarm Tevt-Drift Span Drift Transient Event Alm-Drift Span Drift Alarm Tevt-Phase Span Phase Transient Event Alm-Phase Span Phase Alarm Alm-Jitter Span Jitter Alarm TimeSource 2500...
  • Page 161 Table P. BTMONitor Alarm Monitor Screen Messages (cont’d) Description Message Definition Page No. Remote Osc A or Remote Osc B Tevt-Freq RO Frequency Transient Event Alm-Freq RO Frequency Alarm Tevt-Drift RO Drift Transient Event Alm-Drift RO Drift Alarm Tevt-Phase RO Phase Transient Event Alm-Phase RO Phase Alarm Alm-Jitter...

  • Page 162: Gps Event And Alarm Summary

    It is normal for frequent GPS transient event activity to occur, depending on the antenna and window or wall location. When a transient event escalates to an event, the TimeSource 2500 enters bridging mode, and operates on its predictors, but will not report a minor or major alarm.

  • Page 163: Gps Frequency Transient Event

    The GPS receiver performs a complete update of the current time (clock bias) and frequency (clock drift) estimates every second. The TimeSource 2500 compares the current frequency estimate of the corrected local oscillator, with respect to GPS, and declares a GPS Frequency Event, if the magnitude of the offset is greater than the 0.02 ppm threshold.

  • Page 164: Gps Frequency Alarm

    The rate of change of the GPS frequency estimate is calculated, to determine if the current slew rate is within the expected measurement window for GPS, given the effects of Selective Availability and dynamic changes in the number and elevation of tracked satellites. Maintenance action required: None. TimeSource 2500...

  • Page 165: Gps Drift Event

    GPS fix mode information has been entered properly, via the BTMONitor Installation screen. 2. The TimeSource 2500 should not normally generate a GPS drift alarm because of multipath, even with a very limited view of the sky. However, it is possible to reduce the impact of low- elevation multipath, by increasing the elevation mask to exclude low-elevation satellites.

  • Page 166: Gps Time Accuracy Transient Event

    Note: If the TimeSource 2500 suddenly stops tracking satellites, and does not reacquire any satellites for 24 hours or more, the sys- tem critical memory may have become corrupted. Reset the GPS receiver (using the Reset screen).

  • Page 167: Antenna Alarm

    Antenna Alarm This alarm indicates that the external antenna port is operating at an abnormal current level. This normally indicates a faulty cable, or antenna pre-amp. This condition is reported directly as a minor alarm. Maintenance action required: Check and tighten all antenna cable connections.

  • Page 168: Span Input Event And Alarm Summary

    Span Input Event and Alarm Summary The TimeSource 2500 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 169: 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 2500 checks for drift events every 4 seconds. Maintenance action required: None.

  • Page 170: Span Drift Alarm

    In general, all phase events will produce drift events. A phase event is observed over a 250 ms interval after removing network jitter. The default threshold for a span phase transient event is greater than 250 ns. Maintenance action required: None. TimeSource 2500...

  • Page 171: Span Phase Alarm

    Span Phase Alarm Span phase transient event data is processed through a leaky- bucket alarm manager, to control escalation to an event or alarm. The nominal time to assert is 7 seconds, and the maximum time to retire is 3 minutes. Maintenance action required: Occasional span phase alarm activity may occur as a result of network maintenance.

  • Page 172: Remote Oscillator (Ro) Input Event And Alarm Summary

    Remote Oscillator (RO) Input Event and Alarm Summary The TimeSource 2500 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 173: Ro Frequency Alarm

    RO Drift Transient Event The relative difference is measured between the input frequency and the current output frequency of the TimeSource 2500. 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 174: Ro Drift Alarm

    7 volts common mode. If the signal looks good, troubleshoot the remote oscillator. RO Phase Transient Event The phase transient event category is used to detect “fast” phase transient events. The threshold for a phase transient is greater than 250 ns. Maintenance action required: None TimeSource 2500...

  • Page 175: Ro Phase Alarm

    RO Jitter Alarm The TimeSource 2500 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 176: Phase Locked Loop (Pll) Event

    “pops” in the synthesizer PLL. A step event is the magnitude of the delta between successive 250 ms samples exceeding the threshold. The threshold is 0.5 percent of the total VCXO pull-in range (70 ppm minimal). Maintenance action required: None. TimeSource 2500...

  • Page 177: Pll Step Alarm

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

  • Page 178: Pll Range Alarm

    PLL Jitter Alarm If the jitter level exceeds 10 counts at 10 bits for nominally 100 ms, a PLL jitter alarm is reported. Maintenance action required: Replace the shelf. TimeSource 2500...

  • Page 179: Temperature (Tp) Event And Alarm Summary

    Temperature (TP) Event and Alarm Summary Temperature event and alarm data reports temperature changes of the local oscillator oven. Step and jitter alarms are likely indications of a hardware fault. A problem with outside air (room) temperature is indicated by a standing slew alarm, if no other alarms are present.

  • Page 180: Tp Slew Event

    7 minutes. The maximum time to retire an alarm is 10 minutes. Maintenance action required: 1. Determine if the TimeSource 2500 Shelf is being exposed to an unusual amount of air flow variation (for example, the shelf is located next to a heating vent). If so, reposition the shelf.

  • Page 181: Tl1 Messages

    TL1 Messages The TimeSource 2500 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 182: Parameters

    This parameter indicates the effect of the condition on the equipment. A transient condition does not change the basic state of the equipment. Valid values are: = standing condition raised = standing condition cleared = transient condition TimeSource 2500...
  • Page 183 Table R. Parameter Definitions (cont’d) Parameter Definitions condtype This parameter is the condition type. It indicates the type of condition being reported. Valid values are: MODE = the equipment is powering up or software downloading ERROR = there is an error in one of the signals being ensembled = there is a loss of one of the signals being ensembled = there is an alarm indication signal being received on one of the ex- ternal span inputs...

  • Page 184: Message Troubleshooting

    (0–23), mm is minutes (0–59), and ss is seconds (0–59). The factory setting is GMT for local time. Message Troubleshooting To troubleshoot alarm and event messages, refer to Table S. Table S lists the messages, what the messages mean, and what action to take to troubleshoot the problem. TimeSource 2500...
  • Page 185 2. Raise the antenna elevation mask setting, using the BTMONitor Installation screen. 3. Check the cable connections between the TimeSource 2500 Shelf and the antenna. 4. If the error repeats, replace the antenna. 5. If the error repeats, replace the cable.
  • Page 186 TimeSource 2500 environmental specifications. If not, correct the ambient temperature with heating or air conditioning. 2. If the ambient air temperature is within the TimeSource 2500 environmental specifications, replace the system. EVENTS DOWNLOAD The software download has Retry the software download.
  • Page 187 If this does not occur during power-up: check that the ambient air temperature is within the TimeSource 2500 environmental specifications. If not, correct the ambient temperature with heating or air conditioning. Troubleshooting...

  • Page 188: Repair And Return

    Repair and Return When returning defective equipment for factory repair, obtain the following information prior to calling Symmetricom: • A complete description of the trouble (alarms, equipment behavior, etc.), part number, serial number, issue/revision level, and warranty expiration date. • If the warranty has expired, a purchase order with “bill to”...
  • Page 189 Note: Retain the RMA number for future reference. The RMA number is used by Symmetricom for internal tracking of the unit. Reference the RMA number in all communications with Symmetricom regarding the unit. Pack the defective equipment, including a list containing all the information obtained above, in the original packing material.

  • Page 190: Technical Assistance

    Technical Assistance For technical assistance, contact the following: Symmetricom, Inc. 2300 Orchard Parkway San Jose, CA 95131-1017 U.S.A. Call Center: 888-367-7966 (from inside U.S.A. only – toll-free) 408-428-7907 U.K. Call Center: +44.7000.111666 +44.1604.586740 Fax: 408-428-7998 E-mail: ctac@symmetricom.com Internet: http://www.symmetricom.com TimeSource 2500...

  • Page 191: Sales

    Sales For sales assistance, contact the following: Symmetricom, Inc. 2300 Orchard Parkway San Jose, CA 95131-1017 U.S.A. Call Center: 888-367-7966 (from inside U.S.A. only – toll-free) 408-428-7907 U.K. Call Center: +44.7000.111888 +44.1604.586740 Fax: 408-428-7998 E-mail: info@symmetricom.com Internet: http://www.symmetricom.com Troubleshooting...

  • Page 192: Manual Updates

    “manuals@symmetricom.com”: • Name • Title • Company • Address An e-mail will be returned, which will include the internet address of the update site, and a name and password necessary to access the site. TimeSource 2500...
  • Page 193 Chapter Specifications This chapter provides equipment specifications.

  • Page 194: Antenna

    5.3 oz Operating Temperature: 0 °C to 50 °C Operating Humidity: 0% to 95% non-condensing Wall Voltage: 12 V Gain: 26 dB Connector : TNC female Dimensions: (including connector) Height: 1.14 in. Diameter : 2.2 in. Weight: 3.2 oz TimeSource 2500...

  • Page 195: 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 Configuration: Data terminal equipment (DTE) Baud Rate: 9600 bps Craft Communication Port Connector Type: RJ-45 Connector Label: Craft Connector Location: Front panel Electrical Interface: RS-232...

  • Page 196: T1 Inputs

    1.544 MHz Ω Ω Impedance: ±5 Format: Line Code: 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: Jitter Tolerance: Meets GR-1244 requirements TimeSource 2500...

  • Page 197: Remote Oscillator Inputs

    Remote Oscillator 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 198: T1 Outputs

    Frequency: 1.544 MHz 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: Transmission During Alarms: SSM (ESF only) Squelch Forced TimeSource 2500...

  • Page 199: Time Of Day Output

    Time of Day Output Connector Type: 9-pin, female DB9 connector Connector Label: TOD RS-422 Connector Location: Front panel Time of Day Data Format: Network Time Protocol (NTP), Type 4, Format 2 Driver : Time Format: Year Julian-date hour :minute:second:millisecond Alarm Fields: First character, space = machine synchronized, First character, ? = machine out of synchronization...

  • Page 200: 10 Mhz Output

    60 dBc – Phase Noise: (referenced at 10 MHz) 120 dBc @ 100 Hz – 135 dBc @ 1 kHz – 135 dBc @ 10 kHz – 135 dBc @ 100 kHz – 135 dBc @ 1 MHz – TimeSource 2500...

  • Page 201: Alarms

    Alarms Connector Type: RJ-45 Connector Label: Alarms Connector Location: Front panel Contact Type: Contact Rating: 1 A @ 30 V dc 0.5 A @ 60 V dc 0.5 A @ 125 V ac Severity Levels: Major Minor Major : Closed when not powered, closed when powered and in Major alarm, open when powered and not in Major alarm Minor :...

  • Page 202: Power

    Steady State Power : (25 °C) 27 W Fuse for Battery Feed: (Recommended) Shelf Mechanical Mounting: Wall 19 in. rack 23 in. rack Rack Mounting Position: Flush 5 in. offset Width: 15.1 in. Height: 2.8 in. Depth: 9 in. Weight: 7.5 lb TimeSource 2500...

  • Page 203: Wire-Wrap Panel Mechanical

    Wire-Wrap Panel Mechanical Mounting: 19 in. rack 23 in. rack Rack Mounting Position: Flush 5 in. offset Width: 17.1 in. Height: 3.5 in. Depth: 6.75 in. Weight: 1 lb Shelf and Wire-Wrap Panel Environmental Operating Temperature: 0 °C to + 50 °C Operating Humidity: 5 % to 85 % RH Electromagnetic Compliance:...

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