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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)

Содержание 8144-DD

Страница 1: ...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 ...

Страница 2: ... will make the repairs or replacement of components and charge its then current price which buyer agrees to pay Spectracom shall not have any warranty obligations if the procedure for warranty claims is not followed Users must notify Spectracom of the claim with full information as to the claimed defect Spectracom products shall not be returned unless a return authorization number is issued by Spe...

Страница 3: ... 1 3 1 6 1 Inputs 1 3 1 6 2 Outputs 1 4 1 6 3 Power Requirements 1 4 1 6 4 Mechanical and Environmental Specifications 1 4 1 6 5 Status Indicators 1 5 1 6 6 Operator Controls 1 5 1 6 7 User Configurable Options 1 6 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 2 0 INTRODUCTION 2 1 2 1 PREPARATION FOR USE 2 1 2 1 1 AC Line Voltage Select...

Страница 4: ... REAR PANEL CONNECTIONS 3 4 SECTION 4 OPTIONS 4 1 DC POWER OPTIONS 52 AND 54 4 1 4 2 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 5 0 MAINTENANCE AND CALIBRATION 5 1 5 1 FUSE REQUIREMENTS 5 1 ...

Страница 5: ...NECTOR PINS 3 5 TABLE 4 1 OPTION 11 CHECKLIST 4 1 TABLE 4 2 OPTION 102 CHECKLIST 4 2 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 FIGU...

Страница 6: ...TION 1 GENERAL INFORMATION 1 0 INTRODUCTION 1 1 FEATURES 1 2 WARRANTY INFORMATION AND PRODUCT SUPPORT 1 3 MANUAL ERRATA AND SPECIAL DOCUMENTATION 1 4 UNPACKING 1 5 CONFIGURATION OPTIONS 1 6 SPECIFICATIONS ...

Страница 7: ...ng manual or automatic switchover to a backup system clock when the primary system clock has failed The 8144 also provides twelve outputs for distribution of the selected clock 1 1 FEATURES The 8144 Clock Selector Distribution Amplifier offers the following features Manual or automatic switchover between two clock sources or single input operation Local and remote alarm indicators normal or latche...

Страница 8: ...ons or changes made to the instrument occurring after the printing of this manual are found on the errata sheet located at the rear of this manual Spectracom sometimes makes instrument modifications upon special request The documentation associated with any special modifications is also located in the back of the manual 1 4 UNPACKING Upon receipt examine the carton and its contents carefully If th...

Страница 9: ... Configuration Summary Option Type Option Designation Power P AC Standard 12 to 24 VDC Power 48 VDC Power none 52 54 Mounting M 19 Rack Standard 19 Rack with Slides 23 24 Rack 19 Setback Rack none 11 102 103 TABLE 1 1 CONFIGURATION SUMMARY 1 6 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 compl...

Страница 10: ... 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 Tolerance Same frequency as input Level 2 4 to 3 6V base to peak into 100 ohms 5 Termination Balanced twisted pair Impedance 100 ohms 5 Pulse Shape Per Figure 1 of ANSI T1 102 1987 1 6 3 Power Requirements Standard Option 115...

Страница 11: ...m Indication Signal on one reference input if AIS is enabled EXTERNAL ALARM INPUT An External Alarm Input on one alarm input READY A B The green lamps indicate that clock input at A and or B is available and that the corresponding alarm input is not activated SELECTED A B The green lamps indicate that the A or B clock input has been selected 1 6 6 Operator Controls RESET A momentary contact switch...

Страница 12: ...dition exists A B AIS selects whether the unit recognizes or ignores the Alarm Insertion Signal DS1 Output Framing Mode selects ESF or D4 framing outputs DS1 Output Line Length Compensation selects line buildout waveshaping for each output 1 6 8 Alarm Outputs Alarm relays allow remote monitoring of operational status Relay contacts are provided for Major and Minor Alarms 1 6 8 1 Alarm Classificati...

Страница 13: ... panel ACO switch Faults and conditions listed below actuate a Minor Alarm LOS Loss of DS1 reference signal on one reference input AIS Alarm Indication Signal on one reference input 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 b...

Страница 14: ...SECTION 2 INSTALLATION 2 0 INTRODUCTION 2 1 PREPARATION FOR USE 2 2 SWITCH AND HEADER SETTINGS ...

Страница 15: ...r 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 1 Remove the line cord if installed from the line voltage connector 2 Open the fuse and selector drum cover with a small flat bladed screwdriver Insert the screwdriver blade into the cove...

Страница 16: ...tion Manual 8144 DD 075020 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 ...

Страница 17: ...put 1 H8 Major Alarm Indicator Latch Select Latched 1 Not Latched H9 Minor Alarm Indicator Latch Select Latched 1 Not Latched H10 Major Alarm Relay Latch Select Latched 1 Not Latched H11 Minor Alarm Relay Latch Select Latched 1 Not Latched H14 A Channel AIS Alarm Select Alarm on AIS 1 No Alarm on AIS H15 B Channel AIS Alarm Select Alarm on AIS 1 No Alarm on AIS H16 Switching Priority Non revertive...

Страница 18: ...Section 2 Installation Page 2 4 Instruction Manual 8144 DD 075020 FIGURE 2 2 MODEL 8144 DD COMPONENT LAYOUT ...

Страница 19: ...nation B Terminates the A Alarm RS 422 485 input with 120 ohms between terminals 1 and 2 A Removes the 120 ohm termination from the A Alarm input This position may be used as an RS 422 485 input between terminals 1 and 2 or a relay closure between terminals 1 and 3 Use position B C unless RS 422 485 input line needs termination If relay closure input is used the header must be in the B C position ...

Страница 20: ...R ALARM INDICATOR on the front panel does not latch The indicator is ON only when a Major Alarm is present The light extinguishes automatically when the condition clears The RESET switch does not reset the indicator H9 Minor Alarm Indicator Latch Select A The MINOR ALARM INDICATOR on the front panel is latched on by a Minor Alarm A Minor Alarm exists when one of the references is not ready AIS or ...

Страница 21: ...nnel causes switchover to B and or alarm B Unit does not look for the AIS on the A clock input H15 B Channel AIS Alarm Select A An AIS on the B channel causes an alarm B The unit does not look for the AIS on the B clock input H16 Switching Priority A Non revertive switching in automatic unit stays on last input selected until an alarm causes a change to the other input B Revertive switching with t...

Страница 22: ... and 2 S10 Programs DS1 output on J3 pins 4 and 5 S3 Programs DS1 output on J3 pins 7 and 8 S9 Programs DS1 output on J3 pins 10 and 11 TABLE 2 2 OUTPUT LINE LENGTH SWITCH ASSIGNMENTS Refer to Figure 2 2 for the locations of connectors J1 through J3 and switches S3 through S14 Set the switch sections according to Table 2 3 for DS1 applications S3 thru S14 OPTION SELECTED APPLICATION 1 2 3 4 OFF OF...

Страница 23: ...Section 2 Installation Instruction Manual 8144 DD 075020 Page 2 9 FIGURE 2 3 8144 DD REAR RANEL FIGURE 2 4 8144 DD REAR PANEL ...

Страница 24: ...e connected to the ALM INPUTS terminal block The alarm inputs can be either RS 422 485 levels or contact closures Pins 1 and 2 are the RS 422 485 A channel alarm inputs Pins 4 and 5 are the RS 422 485 B channel alarm inputs In the AUTO mode a contact closure between 1 and 3 GND causes the unit to switch from the A clock source to the B clock source and causes a Minor Alarm A contact closure betwee...

Страница 25: ...EADY indicators are green if the corresponding clock input is present and not in an AIS condition 10 3 The green SELECTED indicator switch corresponds to the input currently selected 10 4 AUTO MAN switch If revertive A priority has been selected on H16 in the AUTO position a ready A clock source has priority Failure of the A clock switches the unit to the B clock input When the A input returns the...

Страница 26: ...SECTION 3 OPERATION 3 0 INTRODUCTION 3 1 THEORY OF OPERATION 3 2 FRONT PANEL FUNCTIONS 3 3 REAR PANEL CONNECTIONS ...

Страница 27: ...TOR SWITCH DS1 Clock Extractor DS1 Clock Extractor SECONDARY REFERENCE INPUT B PRIMARY REFERENCE INPUT A FRONT PANEL MANUAL CONTROL ALARM INPUTS ALARM OUTPUTS DISTR AMP 6 DISTR AMP 5 DISTR AMP 4 DISTR AMP 3 DISTR AMP 2 DISTR AMP 1 DISTR AMP 12 DISTR AMP 11 DISTR AMP 10 DISTR AMP 9 DISTR AMP 8 DISTR AMP 7 OUTPUT 6 OUTPUT 5 OUTPUT 4 OUTPUT 3 OUTPUT 2 OUTPUT 1 OUTPUT 12 OUTPUT 11 OUTPUT 10 OUTPUT 9 O...

Страница 28: ...mode the channels can be selected remotely by asserting an alarm on the rear panel alarm inputs Putting an alarm condition on the A channel causes the unit to select channel B An alarm on channel B causes channel A to be selected In manual mode if a channel is selected and an alarm input is asserted for that channel the outputs are removed In either mode if an alarm is asserted on both rear panel ...

Страница 29: ...ion RESET Pushbutton This pushbutton turns off the alarm lamps if the fault causing the alarm has been corrected If the lamps have been set to non latching with internal headers H8 and H9 this button has no effect ACO Pushbutton Alarm Cut Off This pushbutton unlatches the alarm relays if the fault causing the alarms has been corrected If the relays have been set to non latching with the internal h...

Страница 30: ... only if the B READY indicator is lit and the A READY indicator is off If non revertive switching has been configured H16 the lamp will light when B is selected and remain on until A is selected AUTO MANUAL Switch This switch selects automatic switchover or manual control of the clock references In the AUTO position the unit will automatically switch to the backup channel if it is ready In the MAN...

Страница 31: ... There are Tip Ring and Ground triads for each input The A reference input is connected at pins 1 2 and 3 the B reference is connected at pins 4 5 and 6 ALM INPUTS The alarm inputs are connected here There are two plus minus ground triads for each alarm The A alarm is on pins 1 2 and 3 and the B alarm is on pins 4 5 and 6 The alarm inputs can be either RS 422 485 levels or contact closures A conta...

Страница 32: ...n The DC PWR terminals are provided for two DC power sources and polarity is marked on the chassis Both sources must have the same polarity referenced to ground If AC power is provided check the voltage selector in the AC power connector and connect the power cord If necessary refer to Section 2 1 1 AC Line Voltage Selection to change to 230 VAC power CHASSIS GROUND This ground stud allows connect...

Страница 33: ...SECTION 4 OPTIONS 4 1 DC POWER OPTIONS 52 AND 54 4 2 MOUNTING OPTIONS ...

Страница 34: ...MOUNTING OPTIONS There are three mounting options available in addition to the standard 19 inch rack mount 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 Description 1 Right hand slide assembly 1 Left hand slide assembly 2 F...

Страница 35: ...ts nut plates and required hardware 4 Insert the unit into the rack assembly Secure the Model 8144 DD to the rack using the front panel mounting holes 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 Quantity Description 2 23 24 Mou...

Страница 36: ...st the parts supplied with Option 103 Verify that these items have been received Quantity Description 2 Setback Mounting Bracket 4 10 Split Lock washer 4 10 32 x 1 2 Philips Pan Head Screw TABLE 4 3 OPTION 103 CHECKLIST A Philips screwdriver is needed to assemble the setback mounting kit To assemble the kit attach the mounting brackets to each side of the Model 8144 DD with the hardware provided ...

Страница 37: ...SECTION 5 SERVICE INFORMATION 5 0 MAINTENANCE AND CALIBRATION 5 1 FUSE REQUIREMENTS ...

Страница 38: ... no components that require periodic maintenance or adjustments 5 1 FUSE REQUIREMENTS 115 VAC 0 5 Amp 250V Fast Blo 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 ...

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