1. Manuals
  2. Brands
  3. Spectracom Manuals
  4. Amplifier
  5. 8144-DD
  6. Instruction manual

Spectracom 8144-DD Instruction Manual

Clock selector/distribution amplifier
Hide thumbs
Table of Contents

Advertisement

Quick Links

MODEL 8144-DD
Clock Selector/Distribution Amplifier
Instruction Manual
SPECTRACOM CORPORATION
95 Methodist Hill Drive, Suite 500
Rochester, NY 14623
Phone 585.321.5800
Fax 585.321.5219
www.spectracomcorp.com
REVISIONS, IF ANY, ARE LOCATED AT THE END OF THE MANUAL
REVISION A
December 2003
(Model 8144-DD/075020)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 8144-DD and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Spectracom 8144-DD

Summary of Contents for Spectracom 8144-DD

  • Page 1 MODEL 8144-DD Clock Selector/Distribution Amplifier Instruction Manual SPECTRACOM CORPORATION 95 Methodist Hill Drive, Suite 500 Rochester, NY 14623 Phone 585.321.5800 Fax 585.321.5219 www.spectracomcorp.com REVISIONS, IF ANY, ARE LOCATED AT THE END OF THE MANUAL REVISION A December 2003 (Model 8144-DD/075020)

  • Page 2: Year Warranty

    If in Spectracom's judgment the defective condition in a Spectracom product is for a cause listed above for which Spectracom is not responsible, Spectracom will make the repairs or replacement of components and charge its then current price, which buyer agrees to pay.

  • Page 3: Table Of Contents

    1.6.8 Alarm Outputs ..............1-6 1.6.8.1 Alarm Classification ........1-6 1.6.8.2 Alarm Interface ..........1-7 SECTION 2 INSTALLATION INTRODUCTION................2-1 PREPARATION FOR USE..............2-1 2.1.1 AC Line Voltage Selection..........2-1 2.1.2 Power Options..............2-2 SWITCH AND HEADER SETTINGS..........2-3 8144-DD/075020...

  • Page 4: Section 3 Operation

    DC POWER OPTIONS 52 AND 54............4-1 MOUNTING OPTIONS ..............4-1 4.2.1 Option 11, Rack Mount with Slides ........4-1 4.2.2 Option 102, 23/24-inch Rack Mount ........4-2 4.2.3 Option 103, Setback Mount ..........4-3 SECTION 5 SERVICE INFORMATION MAINTENANCE AND CALIBRATION ..........5-1 FUSE REQUIREMENTS ..............5-1 8144-DD/075020...
  • Page 5 TABLE 4-3 OPTION 103 CHECKLIST ..........4-3 LIST OF ILLUSTRATIONS FIGURE 2-1 LINE VOLTAGE SELECTION/FUSE REPLACEMENT ..2-2 FIGURE 2-2 MODEL 8144-DD COMPONENT LAYOUT .......2-4 FIGURE 2-3 8144-DD REAR PANEL.............2-9 FIGURE 2-4 8144-DD FRONT PANEL ..........2-9 FIGURE 3-1 MODEL 8144-DD BLOCK DIAGRAM ........3-1 FIGURE 3-2 MODEL 8144-DD FRONT PANEL........3-3...

  • Page 6: General Information

    SECTION 1 GENERAL INFORMATION INTRODUCTION FEATURES WARRANTY INFORMATION AND PRODUCT SUPPORT MANUAL ERRATA AND SPECIAL DOCUMENTATION UNPACKING CONFIGURATION OPTIONS SPECIFICATIONS...

  • Page 7: Introduction

    Manual or automatic switchover between two clock sources or single input • operation. Local and remote alarm indicators, normal or latched, reset from the front • panel. Redundant power sources • Twelve independent outputs. • DS1 input and output signals. • Instruction Manual 8144-DD/075020 Page 1-1...
  • Page 8 Section 1: General Information WARRANTY INFORMATION AND PRODUCT SUPPORT Warranty information is found on the leading pages of this manual. Contact Spectracom Corporation to obtain a replacement or service. Spectracom continuously strives to improve its products. We greatly appreciate any and all customer feedback given.

  • Page 9: Configuration Options

    TABLE 1-1 CONFIGURATION SUMMARY SPECIFICATIONS 1.6.1 Inputs The Model 8144-DD accepts one or two clock inputs as well as one or two alarm inputs. DS1 CLOCK INPUTS The DS1 clock inputs comply with ANSI T1.102-1987 as follows: Line Rate: 1.544 Mb/s Tolerance: ±130 ppm (200.72 Hz)

  • Page 10: Outputs

    1 and 3 on the alarm inputs alarms the A channel. A contact closure between pins 4 and 6 alarms the B channel. 1.6.2 DS1 Outputs The Model 8144-DD provides up to twelve clock outputs. DS1 CLOCK OUTPUTS The twelve DS1 clock outputs comply with ANSI T1.102-1987 as follows: Line Rate: 1.544 Mb/s...

  • Page 11: Status Indicators

    Alarm Cut Off. A momentary contact switch that removes the remote alarm condition (unlatches the alarm relays). AUTO/MANUAL: Enables automatic switchover or manual selection of references. Turns power ON or OFF. Switch must be pulled out to toggle. Instruction Manual 8144-DD/075020 Page 1-5...

  • Page 12: User-Configurable Options

    Loss of DS1 reference signal on both inputs. An Alarm Indication Signal on both reference inputs. EXTERNAL ALARM INPUT An External Alarm Input on both alarm inputs. POWER FAILURE External power failure, fuse or internal power supply failure. Page 1-6 Instruction Manual 8144-DD/075020...

  • Page 13: Alarm Interface

    EXTERNAL ALARM INPUT An External Alarm Input on one alarm input. 1.6.8.2 Alarm Interface Alarm Outputs: Major Alarm, Minor Alarm Relay Contacts: NO, NC and common. Contact Rating: 30 VDC, 2 amps Connector: 7-position terminal block (supplied) Instruction Manual 8144-DD/075020 Page 1-7...

  • Page 14: Introduction

    SECTION 2 INSTALLATION INTRODUCTION PREPARATION FOR USE SWITCH AND HEADER SETTINGS...

  • Page 15: Introduction

    2.1.1 AC Line Voltage Selection The Model 8144-DD is factory set for 115 VAC ±10%, 50/60 Hz power line operation. The instrument may also be operated from a 230 VAC ±10%, 50/60 Hz power line. For 230 VAC operation, change the voltage selection drum and line fuse as illustrated in Figure 2-1, and as described below: Remove the line cord (if installed) from the line voltage connector.

  • Page 16: Power Options

    FIGURE 2-1 LINE VOLTAGE SELECTION/FUSE REPLACEMENT 2.1.2 DC Power Options Check that the power options on the unit match the power available: Option 52, 12 VDC to 24 VDC: ±11.0 to 32.0 VDC Option 54, 48 VDC: ±55.2 VDC ±20% Page 2-2 Instruction Manual 8144-DD/075020...

  • Page 17: Switch And Header Settings

    Data Output Select Factory Test Framed all one’s = Factory setting TABLE 2-1 SWITCH AND HEADER SETTINGS SUMMARY Refer to Figure 2-2, Component Layout, to locate and identify functions of the internal switches and jumpers. Instruction Manual 8144-DD/075020 Page 2-3...

  • Page 18: Figure 2-2 Model 8144-Dd Component Layout

    Section 2: Installation FIGURE 2-2 MODEL 8144-DD COMPONENT LAYOUT Page 2-4 Instruction Manual 8144-DD/075020...
  • Page 19 4 and 5 for bridging applications. A Clock Termination Terminates the A Clock input at terminals 1 and 2 with 100 ohms for DS1 input. Removes the terminating resistor for high-impedance input at terminals 1 and 2 for bridging applications. Instruction Manual 8144-DD/075020 Page 2-5...
  • Page 20 Position B Input Alarm Enable If the 8144-DD is used with only an A clock input, connecting A to B on header H7 disables the alarm inputs for the B clock input. Loss of the A reference or the assertion of the A Alarm input now results in a major alarm.
  • Page 21 Sets DS1 output framing to D4. Switch Position Switches 1-4 OFF for normal operation Switches 1-4 OFF for normal operation S2 Position 4 is reserved for factory use only Data Output Select Reserved for factory use only Framed all ones Instruction Manual 8144-DD/075020 Page 2-7...

  • Page 22: Output Line Length Switch Assignments

    266 – 399 FT DSX-1 Cross-Connect OFF OFF DON’T CARE 399 – 533 FT DSX-1 Cross-Connect OFF OFF OFF DON’T CARE 533 – 655 FT DSX-1 Cross-Connect = Factory setting TABLE 2-3 OUTPUT LINE LENGTH SWITCH SETTINGS Page 2-8 Instruction Manual 8144-DD/075020...

  • Page 23: Dd Rear Panel

    Section 2: Installation FIGURE 2-3 8144-DD REAR RANEL FIGURE 2-4 8144-DD REAR PANEL Instruction Manual 8144-DD/075020 Page 2-9...
  • Page 24 Locate the terminal block connectors in the ancillary kit and install onto rear panel connectors as needed. Refer to Figure 2-3, 8144-DD Rear Panel, for locations. Connect the A clock source to terminals 1 and 2 on the CLKS IN terminal block.

  • Page 25: Dd Front Panel

    Section 2: Installation 10.0 Check the front panel controls and indicators. Refer to Figure 2-4, 8144-DD Front Panel, for locations of these controls and indicators. 10.1 ALARMS and INDICATORS The Major indicator is red if both clock sources have failed.

  • Page 26: Introduction

    SECTION 3 OPERATION INTRODUCTION THEORY OF OPERATION FRONT PANEL FUNCTIONS REAR PANEL CONNECTIONS...

  • Page 27: Introduction

    OPERATION INTRODUCTION This section describes the front and rear panel functions, switch functions, and operation information for the Model 8144-DD Clock Selector/Distribution Amplifier. DISTR AMP #1 OUTPUT #1 DISTR AMP #2 OUTPUT #2 FRONT PANEL MANUAL CONTROL DISTR AMP #3...

  • Page 28: Theory Of Operation

    The distribution amplifiers split the clock to twelve outputs and sends them to the rear panel connectors. The Model 8144-DD can operate in two modes: Automatic or Manual. In automatic mode, the primary (A) clock has priority and is selected if it is present.

  • Page 29: Figure 3-2 Model 8144-Dd Front Panel

    MINOR RESET AUTO MANUAL FIGURE 3-2 MODEL 8144-DD FRONT PANEL MINOR ALARM Indicator: A minor alarm exists when one of the clock references is lost, or upon the activation of one of the alarm inputs. When only one clock reference is being used, the MINOR ALARM indicator is on constantly, unless header H7 is set to the A-B position.

  • Page 30: Rear Panel Connections

    MINOR alarm indicator is lit. REAR PANEL CONNECTIONS Figure 3-3, 8144-DD Rear Panel, and the following paragraphs describe the rear panel functions. Each terminal block is a pluggable connector. FIGURE 3-3 8144-DD REAR PANEL - AC AND DC CONNECTORS...

  • Page 31: Clock Output Connector Pins

    4 and 6 activates the B alarm. Making the + (plus) more negative than the - (minus) input activates the alarm. The alarm termination headers must be in their high-impedance (B-C) position to use contact closures for alarm inputs. Instruction Manual 8144-DD/075020 Page 3-5...
  • Page 32 Voltage Selection, to change to 230 VAC power. CHASSIS GROUND: This ground stud allows connection of the Model 8144-DD chassis to earth ground. Connect the chassis ground to a known well-grounded frame or a ground stake using the largest cable conductor possible.

  • Page 33: Mounting Options

    SECTION 4 OPTIONS DC POWER OPTIONS 52 AND 54 MOUNTING OPTIONS...

  • Page 34: Table 4-1 Option 11 Checklist

    4.2.1 Option 11, Slides Option 11 allows the Model 8144-DD to be mounted in a 19-inch rack with slide- out capabilities. Table 4-1 lists the hardware supplied with Option 11. Verify that these items have been received. Quantity...

  • Page 35: Option 102, 23/24-Inch Rack Mount

    4.2.2 Option 102, 23/24-inch Rack Mount Option 102 provides the hardware to mount the Model 8144-DD in a 23- or 24- inch rack. Table 4-2 lists the parts supplied with Option 102. Verify that these items have been received.

  • Page 36: Option 103, Setback Mount

    Section 4: Options 4.2.3 Option 103, Setback Mount Option 103 provides the necessary hardware to mount the Model 8144-DD in a setback position. Table 4-3 list the parts supplied with Option 103. Verify that these items have been received. Quantity...

  • Page 37: Service Information

    SECTION 5 SERVICE INFORMATION MAINTENANCE AND CALIBRATION FUSE REQUIREMENTS...
  • Page 38 230 VAC, 0.25 Amp, 250V, Fast-Blo. DC options have different fuse requirements. Option 52,12 to 24 VDC input: 2.0 Amp, 250V, Slo-Blo (2 required). Option 54, 48 VDC input: 0.5 Amp, 250V, Slo-Blo (2 required). Instruction Manual 8144-DD/075020 Page 5-1...

Table of Contents