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Appendix C: Recovering a Clock from an External Electrical Signal

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GTS1063 and GTS1250 GBIC Test Systems Instruction Manual

Proper Internal Termination: Using a Powered Down GBIC as a Termination

The –RX Data and +Rx Data connectors on the GBIC Test System are 50 ohms
impedance as seen into the instrument when the +Rx Data and –Rx Data pins on
the GBIC connector are terminated in 75 ohms (to AC GND). Without a GBIC
installed into receptacle the termination mismatch from a 50 ohm signal being
input into either the +Rx Data or –Rx Data can cause reflections, and these in
turn can create errors. One method of terminating the GBIC rece/–Rx
Data pins is to install a standard GBIC into the receptacle and then use the rear
panel D25 pin 24 (GBICPWR_ENA) to shut down the power to the GBIC,
thereby avoiding the GBIC signals from interfering with the external electrical
signal you are inputting to the +Rx Data or –Rx Data connectors. By holding the
GBICPWR_ENA signal low (or shorting this pin to GND) the GBIC will be
silent due to lack of power, yet the GBIC will sill provide proper 75 ohm
termination for the –Rx_DATA and +RX_DATA signal lines.

Input Sensitivity

Using the +/–RX DATA connectors as inputs has been type tested by Tektronix
to have a Bit Error Performance better than 10

–10

for single-ended or compli-

mentary inputs (see page 34).

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Summary of Contents for GTS1063

Page 1: ...ess underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respecti...

Page 2: ...nstructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 3: ...n this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc 14200 SW Karl Braun Drive Beaverton OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix Inc Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 4: ...cations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or conn...

Page 5: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 6: ...itor 27 Installation in a Rack 28 Specifications 29 Performance Verification 43 Prerequisites 43 Equipment Required 44 GTS1250 GBIC Test System Test Record 45 Setup For PV 46 Tx DATA CLOCK and SYNC Output levels 46 Recovered Data and Clock Output Levels Option 01 Only 50 Tx Data Duty Cycle 52 Tx Clock to Data Random Jitter 54 Fast Deterministic Jitter 58 Tx DATA to SYNC OUT Deterministic Jitter 61...

Page 7: ...ectors used as electrical inputs 91 Overriding RX_LOS to Enable the Clock Recovery Circuit 91 Proper AC Input Coupling Single ended or Complimentary 91 Proper Internal Termination Using a Powered Down GBIC as a Termination 92 Input Sensitivity 92 Glossary 93 Index 99 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 8: ... and Rx are close together loopback 25 Figure 13 Stress Testing via increasing Transmitted Jitter through the rear Tx JITTER INPUT 26 Figure 14 Stress Testing via increasing Deterministic Jitter through the rear Tx JITTER INPUT 27 Figure 15 Using the GBIC Test System as a fiber path repeater or monitor 28 Figure 17 GBIC Test System modifications before installation in rack adapter 28 Figure 18 Tx ...

Page 9: ...67 Figure 32 Random jitter histogram 69 Figure 33 GBIC port Vdd default voltage Test Setup 70 Figure 34 Removing the top cover 74 Figure 35 Replacing the fuse 75 Figure 36 Replaceable parts 78 Figure 37 Standard accessories 79 Figure 38 Optional accessories 79 Figure 39 Optional power cords 79 Figure 40 Long Pattern and Short Pattern table format 83 Figure 41 Long Pattern and Short Pattern table f...

Page 10: ...ble 11 Rear Panel Interface Connector Level Specifications 36 Table 12 Environmental Characteristics 37 Table 13 Electromagnetic Compatibility EMC 38 Table 14 Safety Characteristics 39 Table 15 Certifications and compliances 41 Table 16 Test equipment 44 Table 17 Deterministic Jitter Calculation 66 Table 18 Example Deterministic Jitter Calculation 66 Table 19 Required tools for fuse removal and re...

Page 11: ...Table of Contents vi GTS1063 and GTS1250 GBIC Test Systems Instruction Manual Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 12: ...ngs on the product Consult the product manual for further ratings information before making connections to the product Do not apply a potential to any terminal including the common terminal that exceeds the maximum rating of that terminal Do Not Operate Without Covers Do not operate this product with covers or panels removed Use Proper Fuse Use only the fuse type and rating specified for this prod...

Page 13: ...property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the product CAUTION Refer to Manual Double In...

Page 14: ... of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When Servicing With Power On Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test leads before removing protective panels soldering or replacin...

Page 15: ...Service Safety Summary x GTS1063 and GTS1250 GBIC Test Systems Instruction Manual Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 16: ... local Tektronix distributor or sales office Service Support Tektronix offers extended warranty and calibration programs as options on many products Contact your local Tektronix distributor or sales office For a listing of worldwide service centers visit our web site For other information In North America 1 800 TEK WIDE 1 800 835 9433 An operator will direct your call To write us Website Tektronix...

Page 17: ...Test Systems This manual provides user information and information to troubleshoot and repair the instrument to the module level Related Manuals Additional documentation for your GBICs is contained in manuals supplied by the GBIC manufacturer Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 18: ...lation outputs and accepts optical amplitude modula tion signals as input and converts them to digital electrical signals ECL Figure 1 GTS1063 and GTS1250 Front Panels The GBIC Test System provides industry standard 1 25 Gb s GTS1250 or 1 0625 Gb s GTS1063 digital signals to drive your GBIC transmitter plugged into the receptacle for test purposes you can also drive your GBIC transmitter using ext...

Page 19: ... serial data links acts as an electrical to optical E O transducer and an optical to electrical O E transducer for Bit Error Rate Test BERT instruments H Provides a cost effective stand alone stimulus for testing demonstrating and developing O E related time domain waveform instruments that is oscilloscopes with internal or external optical front ends H Supplies a stand alone optical and electrica...

Page 20: ... cord AC Chinese power cord A99 No power cord C3 Three years of calibration D1 Calibration data D3 Three years of calibration data R3 Three years of extended warranty Standard Accessories The GBIC Test System comes standard with the following accessories Table 2 Standard Accessories Accessory Part number Instruction manual 071 0568 00 Certificate of Calibration US power cord 161 0066 00 For a list...

Page 21: ...emissions are included in the Table 14 starting on page 37 CAUTION To prevent damage to your GBIC provide proper ventilation Do not block the cabinet ventilation holes or disable the fan Do not remove the cabinet feet they provide proper clearance for ventilation 2 Leave space for cooling Do this by verifying that the ventilation holes on the sides top and bottom of the cabinet are free of any air...

Page 22: ...ing 550 m on quality fibers Single mode long wavelength 1310 nm 1550 nm optical transceivers are similar to those used by SONET SDH telecom public networks and are capable of spanning 10 kilometers Metallic twisted pair cables with absolutely no optics are sufficient for many short 75 m links and require even lower implementation cost All of these transceivers can be easily interchanged due to the...

Page 23: ...e GBIC receptacle looking at the front of the instrument 3 Press the GBIC into the front panel until it locks into place NOTE Some GBICs contain a removal bail that aids installation and removal of the GBIC Other GBICs only contain a removal lever 4 If your GBIC contains a removal bail move the bail up prior to installation then down after installation to lock the GBIC in place GBIC GBIC PORT rece...

Page 24: ... powers up The pattern selected in this initial power up mode is that which is determined by the TTL assertion state at the rear remote connector at time of power up If not in an automatic program environment press the button for the pattern you want to transmit To exit REM mode from the front panel push any other button To power off the GBIC Test System toggle the power switch Power up defaults P...

Page 25: ...Getting Started 8 GTS1063 and GTS1250 GBIC Test Systems Instruction Manual Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 26: ...ble if the cable has a worn or damaged connector because the GBIC Test System connector may become damaged as well Use extra care when attaching or removing a cable from the connectors Turn only the nut not the cable When attaching a cable align the connectors carefully before turning the nut Use light finger pressure to make this initial connection Then tighten the nut lightly with a wrench For b...

Page 27: ...cle looking at the front of the instrument All the connectors on the right side of the GBIC receptacle are associated with transmitter signals All connec tors on the left side of the GBIC receptacle are associated with receive signals All front panel buttons except for the REM and RESET button select the transmit output pattern Only one pattern is active at a time The abbreviated description of th...

Page 28: ...ns except the all 1s state the longest string of consecutive bits in such a pattern is therefore seven Many bit error rate testers lock on PRBS patterns such as PRBS7 to measure error ratios Note that the gigabit ethernet and fibre channel standards use an 8B 10B encoding scheme such that the longest string of consecutive 1s or 0s possible is only five for this reason the PRBS7 pattern may exhibit...

Page 29: ...B 10B encoding is 1536 bytes After 8B 10B encoding the 1536 8 bit bytes would produce 1536 10 bit sequences and therefore a total bit length of 15 360 bits The IEEE 802 3 standard defines the pattern prior to 8B 10B encoding but the GTS1250 actually transmits the 10B serial version adhering to both encapsulation and running disparity rules The 8B 10B encoding and subsequent encapsulation of the pa...

Page 30: ... recovery this signal is a digitally buffered signal of the GBIC Rx differential signal without any retiming The polarity of this signal matches the differential polarity of the GBIC receiver Recov CLK This output is a 1 25 GHz GTS1250 or 1 0625 GHz GTS1063 clock signal synchronous with the incoming data signal This clock is only available with Option 01 The Rx receive data from the GBIC is buffer...

Page 31: ...de GBIC Test System Front panel interface Typical PECL RECEIVE Rx_DATA signals from GBIC GBIC Rx_DATA 43 2 W 75 W impedance front panel Rx_DATA output coax connector Rx_DATA output coax connector Digital comparator receptacleconnector Clock Recovery Option NRZ DATA Recov Clk out NRZ Recov DATA retimed Without the Clock Recovery option the Recov DATA out signal is a buffered digital output with no ...

Page 32: ...ted see Tx SYNC Out pulse on page 30 EXT DATA IN This is an input through which you can supply an NRZ AC coupled 50 W data signal to digitally modulate the GBIC transmitter EXT mode must be selected When in EXT mode a signal input to this connector is digitally received buffered and routed to the electrical differential data outputs as well as the differential inputs of the GBIC The logical polari...

Page 33: ...s the power connec tor the power switch the Ext Clk Input connector the Tx JITTER INPUT connector and the REMOTE INTERFACE connector Remote Interface Remote Tx Pattern Selection GBIC MOD_DEF Interface GBIC Rx and Tx Flags and GBIC I and V Monitor signals Power Switch Power Connector Ext Clk IN Figure 6 Rear Panel of GTS1250 This is an input through which you can supply a DC coupled signal to modul...

Page 34: ...nd bidirectional Data similar to I2C for GBIC serial ID communication also known as the GBIC MOD_DEF pins H GBIC VDD 5 V supply current or voltage overload flags overload RESET GBIC 5 V VDD current and voltage monitor signals GBIC 5 V VDD supply offset and GBIC power enable H Miscellaneous control inputs front panel lockout and external clock enable GND Serial ID Communication Lines to GBIC MOD_DE...

Page 35: ...r panel external clock input With no input to the enable pin EXT_CLK_ENA the internal 10 kW pull up resistor selects the internal clock Holding the enable pin at a TTL low selects the external 1 256 GHz for the GTS1250 or 1 0625 GHz for the GTS1063 signal input at the rear panel external clock input EXT_CLK When the external clock is enabled the front panel EXT indicator blinks NOTE If you enable ...

Page 36: ...e specifications for your GBIC for more details on the TX_FAULT and the reset method for this signal Rx_LOS If this signal is supported by the GBIC a TTL high level is output and the front panel Rcv LOS LED is illuminated when the incoming power level is below a certain threshold usually this threshold is near the sensitivity limit of the GBIC If a GBIC does not support this signal the GBIC 5 1 st...

Page 37: ...s pressed GBIC suppliers often guarantee Class I laser safety levels for the laser transmit ter output when an overvoltage from the GBIC host is prevented The GBIC Test System internal voltage regulator for the GBIC VDD supply and shutting down the VDD supply on voltage or current overload protect the GBIC from voltage overload Overload RESET Active Low After a GBIC I or V Overload you can turn th...

Page 38: ... as static information or as serial communication The GBIC Test System connects the MOD_DEF pins from an installed GBIC in the following manner see Figure 8 H MOD_DEF 0 is attached to a 4 7 kW pull up resistor to 5 V and is available at the rear panel connector H MOD_DEF 1 is connected to the GBIC serial communication clock line SCA H MOD_DEF 2 is connected to the GBIC serial communication data SD...

Page 39: ...ment Spring closed trap door GBIC rail guide Right angle 20 pin edge connector Main circuit board Figure 9 Isometric view of AMP GBIC receptacle rail guide assembly The internal D connector inside the GBIC Port receptacle is a standard 20 pin female connector The pinout of this connector interfaces to a GBIC module having the pin assignment shown in Figure 10 and Table 5 PIN 1 PIN 10 PIN 11 PIN 20...

Page 40: ...illuminated and the REM indicator remains illuminated Pushing any of the Tx Pattern selection buttons while in the remote REM illuminated mode turns on the associated Tx Pattern and turns off remote mode Pushing the REM button when the REM indicator is already illuminated has no effect In REM mode when no TTL signal is applied at the rear panel connector the default Tx Pattern is EXT To remotely s...

Page 41: ... data The primary job of a BERT is to determine the system error rate The GBIC Test System can be the data source the clock source the driver the source of the recovered clock and data when using the clock recovery option or even the system under test if testing an installed GBIC To test the bit error rate set up the GBIC Test System and the BERT as shown in either Figure 11 or Figure 12 Use the s...

Page 42: ...st GB1400R Clk Data GBIC Test System GBIC Tx Rx EXT Data GB1400T GBIC Test System GBIC Tx Rx Recov Clk Recov Data Tx and Rx ends are far apart GBE Fiber path under test GB1400R Clk Data Figure 11 BER Test of GBE Fiber Path Tx and Rx ends are far apart GBIC Test System GBIC Tx Rx Tx and Rx ends are close together Select PRBS7 LONG SHORT CPAT or CJTPAT Tx patterns Set Rx pattern to match transmit pa...

Page 43: ...s 1 Set up the equipment as shown in Figure 13 or 14 2 If using the setup in Figure 13 set the sinewave generator to the desired jitter frequency 3 Set the sinewave generator or DC voltage to the amplitude required to generate the desired horizontal jitter see External Tx Jitter Input Specifica tions on page 32 4 If you have a clock generator source capable of adding frequency or phase modulation ...

Page 44: ...gth 1310 nm 1550 nm optical transceivers are capable of spanning 10 kilometers Metallic twisted pair cables are sufficient for many short 75 m links You can extend these ranges using a repeater To use the GBIC Test System as a repeater or monitor in the fiber path perform the following steps 1 Set up the GBIC Test System as shown in Figure 15 2 Select the EXT TRANSMIT PATTERN 3 Connect a coaxial c...

Page 45: ...fiber path repeater or monitor Installation in a Rack You may install your GBIC Test System in the optional TVGF13 Rack Adapter In addition to the instructions that come with the adapter do the steps shown in Figure 16 before installing your GBIC Test System in the rack adapter Remove bead chain retaining screws and reinstall only the screws 2 T9 Remove front feet 2 T15 Figure 16 GBIC Test System ...

Page 46: ...tion is required to meet specification nTx Output level swings Output swing levels are specified for 50 RF cable lengths of t0 5 m in length and t0 25 dB loss in the first 2 GHz frequency range Tx DATA output peak to peak minimum u300 mVp p maximum t600 mVp p Tx CLK output peak to peak minimum u300 mVp p maximum t600 mVp p Both the Tx DATA and CLK outputs are AC coupled and require external 50 ter...

Page 47: ...0X oscilloscope and measure the other half on the SD 22 External clock sensitivity u300 mVpp and t1 4 Vpp AC coupled nData to Clock random jitter Tx DATA DATA t4 ps RMS t35 psp p t2 ps RMS t25 psp p typical Data to SYNC Out random jitter typical Tx DATA DATA t4 ps RMS t42 psp p for D21 5 K28 7 patterns only Test Method To measure set the DATA pattern to 1010101010 repeating 125 MHz GTS1250 or 531 ...

Page 48: ...this capacitively coupled input Maximum nondestructive AC input voltage swing 5 Vp p This is the maximum nondestructive AC voltage swing that can be applied to this capacitively coupled input the input 50 termination can be damaged above this level Jitter Transfer This DATA Input is digitally compared and then sent directly to the GBIC receptacle Tx_DATA pins as a differential signal input no sign...

Page 49: ...ximately 110 ps increase in logic HIGH pulse widths 500 mVpp maximum input Values exceeding 500 mV and less than 2 0 V typically yield 130 ps per Volt The Tx Jitter Input signal is DC coupled divided by 5 and applied added to the Vbb logic threshold of one side of a differential digital ECL gate in series with the serial 1 25 Gb s Tx DATA path This coupling allows the external DC signal to directl...

Page 50: ...Vp p Test Method Optical DATA input pattern is set to 1111100000 repeating 125 MHz GTS1250 or 531 25 MHz GTS1063 square wave K28 7 repeated for measuring maximum swing and to 1010101010 D21 5 repeated for minimum swing A Tektronix SD 22 sampler 12 5 GHz is used RF 50 cable used Tektronix part number 015 0560 00 is relatively short 2 ns Use optical loopback from GBIC Tx to GBIC Rx for stimulus Rx R...

Page 51: ...alved to determine the one pass bandwidth 3 dB of this path Rx_DATA min loss input path sensitivity typical Single ended input Minimum 100 mVp p Maximum 2 Vp p Rx Rx_DATA min loss path conversion gain typical 50 amplitude is 42 3 2 of 75 amplitude The differential amplitude between the GBIC receptacle pins Rx_DATA and Rx_DATA are converted to the two 50 outputs with 0 423 gain For example a 1 Vp p...

Page 52: ...e of a pattern that has a much higher transition density than a PRBS or typical network the Recovered Clock circuitry will generally show a higher PLL bandwidth for higher transition densities and a lower PLL bandwidth for lower transition density patterns Rx recovered clock jitter tolerance fMOD t30 kHz 1 5 UI 1200 ps GTS1250 1411 76 ps GTS1063 3 MHz ufMOD u30 kHz 0 15 UI 120 ps fMOD is the frequ...

Page 53: ... rear panel connector ground The drive circuit which converts the current to this voltage signal is passively buffered to the rear panel signal pin through a series 1 k resistor This signal is a positive only voltage relative to the current load average this signal has about 100 kHz bandwidth Rear panel V Monitor Signal Direct 1 to 1 passive GBIC voltage monitor 3 This signal is passively buffered...

Page 54: ... to 0 007 g2 Hz 500 Hz Tested both with and without an IBM GBIC 1250 GBIC module installed Random vibration operating 0 31 g RMS from 5 to 500 Hz 10 minutes each axis Tektronix Standard 062 2858 00 rev B Random Vibration Tektronix Class 3 Tested both with and without an IBM GBIC 1250 GBIC module installed Packaged product vibration and shock The packaged product qualifies under the Distribution Cy...

Page 55: ...1 is sent into the Tx optical in GBIC of the unit in the chamber under test The recovered data of the unit under test is looped back to its own EXT Tx input set to EXT mode and the TX optical output is routed via fiber back out of the chamber into the Optical Rx port of unit number 1 The recovered clock and data of Unit number 1 are routed to a GB1400R and the overall loop BER is measured BER perf...

Page 56: ...oss of function will occur when the system is subjected to the transients as described below Mode Peak Voltage1 Common 2 kV Differential 1 kV IEC 61000 4 5 Immunity conducted disturbances induced by RF fields No instrument failures when the instrument power leads are injected with a 150 kHz to 80 MHz 3 VRMS signal 80 amplitude modulated at 1 kHz IEC 61000 4 6 1 2 50 us Tr Th voltage into open circ...

Page 57: ...Specifications 40 GTS1063 and GTS1250 GBIC Test Systems Instruction Manual Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 58: ... the intent of the directive if used with other products FCC Compliance Emissions comply with FCC Code of Federal Regulations 47 Part 15 Subpart B Class A Limits EC Declaration of Conformity Low Voltage Compliance was demonstrated to the following specification as listed in the Official Journal of the European Union Low Voltage Directive 73 23 EEC amended by 93 69 EEC EN 61010 1 1995 A2 Safety req...

Page 59: ...nerally encapsulated hermetically sealed or located in clean rooms Pollution Degree 2 Normally only dry nonconductive pollution occurs Occasionally a temporary conductivity that is caused by condensation must be expected This location is a typical office home environment Temporary condensation occurs only when the product is out of service Pollution Degree 3 Conductive pollution or dry nonconducti...

Page 60: ...Vdd Voltage Tolerance Prerequisites The tests in this section comprise an extensive valid confirmation of perfor mance and functionality when the following requirements are met H The cabinet must be installed on the GBIC Test System H The GBIC Test System outputs must be terminated in a load of 50 2 W H The GBIC Test System must have been last calibrated adjusted at an ambient temperature between ...

Page 61: ...e with sampling head Bandwidth 6 GHz Jitter t2 1 ps at 25 ns delay 11801C or CSA803C with SD 22 sampling head V K adapter and rigid cable Semi rigid cable 2 for use with SD 22 sampling head 015 0560 00 Cable coax 3 50 SMA male each end 174 1341 00 Power splitter 50 Tektronix 015 1014 00 GBIC 1 25 GB s Tektronix 119 6112 00 Digital voltmeter 4 1 2 digit 1 at 5 Vdc Tektronix DMM150 TX1 or TX3 Optica...

Page 62: ...wing 300 mVpp __________ __________ 600 mVpp Tx SYNC Voltage Swing 300 mVpp __________ __________ 600 mVpp Rx Recovered DATA Voltage Swing Option 01 only D21 5 300 mVpp __________ __________ 600 mVpp Rx Recovered CLK Voltage Swing Option 01 only D21 5 300 mVpp __________ __________ 600 mVpp Rx Recovered DATA Voltage Swing Option 01 only K28 7 300 mVpp __________ __________ 600 mVpp Tx DATA Duty Cy...

Page 63: ...quisites See page 43 NOTE Make sure that the optical connector ends of both the fiber and the input to the GTS1250 are well cleaned before performing this step 1 Connect your wrist strap to the antistatic connector on the front of your oscilloscope NOTE The longer wavelengths of 1310 nm and especially 1550 nm are sensitive to loss in fiber due to bending of the fiber The fiber bend radius of the G...

Page 64: ...enu set the trigger source to external c Set the trigger level to 0 0 V set the trigger polarity to positive edge d Display both SD 22 channels e Set the Vertical Size of both channels to 100 mV div f Set the Horizontal Size to 500 ps div g Select the WAVEFORM menu and select the Horizontal Desc menu h Set the oscilloscope record length to 512 points i Set the oscilloscope to 32 averages on both c...

Page 65: ...50 W terminations Connect an SMA cable between the Tx CLK output of the GBIC Test System and the SD 22 input of the oscilloscope as shown in Figure 18 a Set the Horizontal Size to 500 ps div 9 Verify that after 32 acquisitions have completed the Mean value of the amplitude measurement is u300 mV and t600 mV Record the value on the test record Select K28 7 Tx pattern GBIC Tx Rx Tektronix 1180C or C...

Page 66: ...ement is u150 mV and t300 mV one half of the specification due to the attenuation of the power splitter Record the value on the test record Select K28 7 Tx pattern GBIC Tx Rx Tektronix 1180C or CSA80C Oscilloscope Sync GTS1250 SD 22 Ext Trig input Power Splitter Figure 19 SYNC levels Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 67: ...r The fiber bend radius of the GBIC Test System fiber input should lay with 1 5 inch bend radius along the entire length of the fiber This precaution must be maintained throughout the entire performance verification procedure 2 Install the GBIC and connect the appropriate optical fiber between the Tx and Rx connectors of the GBIC 3 Connect an SMA cable between the Sync output of the GBIC Test Syst...

Page 68: ...d length to 512 points g Set the oscilloscope to 32 averages on both channels NOTE For increased accuracy you may perform a LOOP Gain adjustment of the SD22 head on the oscilloscope If you need instructions refer to the oscilloscope and SD22 user manuals 7 Perform the test with the following sequence on the oscilloscope a Select the MEASURE menu and then the Measurements pop up menu b Set the Pk P...

Page 69: ...ming this step 1 Connect your wrist strap to the antistatic connector on the front of your oscilloscope NOTE The longer wavelengths of 1310 nm and especially 1550 nm are sensitive to loss in fiber due to bending of the fiber The fiber bend radius of the GTS1250 fiber input should lay with 1 5 inch bend radius along the fiber s entire length This precaution must be maintained throughout the entire ...

Page 70: ...ertical Size to 100 mV div f Set the Vertical Offset to 0 V g Set the Horizontal Size to 200 ps div h Set the main Horizontal Position to t100 ns i Set the oscilloscope record length to 512 points j Select the DISPLAY MODES menu k Select the Persist Histograms pop up menu select the Color Grading and then select Exit l Acquire the Tx DATA signal NOTE For increased accuracy you may perform a LOOP G...

Page 71: ... sampling head Coaxial cable Prerequisites See page 43 NOTE Make sure that the optical connector ends of both the fiber and the input to the GTS1250 are well cleaned before performing this step 1 Connect your wrist strap to the antistatic connector on the front of your oscilloscope NOTE The longer wavelengths of 1310 nm and especially 1550 nm are sensitive to loss in fiber due to bending of the fi...

Page 72: ...r menu set the trigger source to external c Set the trigger level to 0 0 V set the trigger polarity to positive edge d Display the Tx CLK OUT signal e Set the Vertical Size to 50 mV div f Set the Horizontal Size to 100 ps div g Set the oscilloscope record length to 512 points 7 Perform the test with the following sequence on the oscilloscope a Find a rising clock edge that is displayed between 20 ...

Page 73: ...ge crossing near the center the the display e Define a horizontal histogram across the middle of the display with a height of 1 mV see Figure 24 Set the display mode to STOP on N waveforms where N is set to 1000 touching the STOP ON N button in the DISPLAY MENU will begin an infinite persistence acquisition of the waveform which will stop acquiring after 1000 waveforms have been accumulated f Alon...

Page 74: ...t Systems Instruction Manual 57 RMS jitter of the Clock to Data Verify that the jitter value is t4 ps RMS and t35 ps peak to peak Figure 24 Random jitter histogram Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 75: ...SMA cable between the Tx DATA output of the GBIC Test System and the SD 22 input of the oscilloscope as shown in Figure 25 3 Connect an SMA cable between the the Tx CLK output of the GBIC Test System and the oscilloscope Ext trigger input Select K28 5 Tx pattern Tektronix 1180C or CSA80C Oscilloscope SD 22 Ext Trig input GBIC Test System Tx CLK Tx DATA Figure 25 Tx Data Deterministic Jitter Test S...

Page 76: ... is 10 ps per division While expanding the waveform readjust the horizontal and vertical controls to maintain the crossing of the eye at the center of the display o Set the oscilloscopes DISPLAY MODE to generate a horizontal histogram Select and then adjust the VERTICAL LIMITS to create a rectangular histogram box 2 mV in vertical height and placed such that it intersects across the crossing of th...

Page 77: ...en the left most local maxima and right most local maxima peak distributions of the histogram If the displayed peak to peak jitter is less than the deterministic jitter specification 40 ps then the GBIC Test System deterministic jitter is within specification For example if the GBIC Test System outputs a deterministic jitter of 20 ps peak to peak and a random jitter of 12 ps peak to peak then the ...

Page 78: ...he SYNC OUT of the GBIC Test System and the oscilloscope Ext trigger input 3 Connect an SMA cable between the Tx DATA output of the GBIC Test System and the SD 22 input of the oscilloscope as shown in Figure 27 Select K28 5 Tx pattern Tektronix 1180C or CSA80C Oscilloscope SD 22 Ext Trig input GBIC Test System Tx DATA Tx Sync Figure 27 Tx Data Deterministic Jitter Test Setup 4 Set the GBIC Test Sy...

Page 79: ...t crossing point edge 0 this point is used as the reference crossing for the next 5 falling edges and 4 more rising edges NOTE The K28 5 Tx Pattern is a repeating 10 bit K28 5 disparity code group followed by a 10 bit K28 5 disparity code group which results in a 20 bit repeating pattern Each instance of the 20 bit pattern in the waveform contains 5 positive going rising edges and 5 negative going...

Page 80: ...sparity K28 5 code group disparity DJ edge 0 DJ edge 2 DJ edge 3 DJ edge 4 DJ edge 5 DJ edge 6 DJ edge 7 DJ edge 8 DJ edge 9 DJ edge 1 Figure 28 K28 5 disparity 10 bit code group with rising edge in first graticule Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 81: ...EL MODE to ABSOLUTE and the REF LEVEL to 0 0 Volts The LEFT and RIGHT limits after being touched are controlled by the two knobs at the lower right of the display H Set the crossing slope in the expanded CROSS parameter window to Figure 29 Expanded Cross measurement setup and test patten falling edge H Adjust the LEFT and RIGHT limits such that the first rising edge edge 0 is the only edge between...

Page 82: ... in the table to the right of the measured values the ideal crossing locations following reference edge 0 are integer multiples of the UI bit period added onto the reference edge For example if the first edge 0 of a GTS1250 occurs at 32 969 ns then the next edge which occurs 5 UI later in this example has an ideal location of 32 969 ns 5 x 800 ps 36 969 ns The unit interval UI is the inverse of th...

Page 83: ...ation Edge number Bit periods after edge T0 Measured 50 crossing example data Ideal perfect zero DJ position of edge crossing Error Deterministic jitter in edge position relative to ideal perfect position measured ideal 0 0 32 973 ns T0 T0 0xUI 32 973 ns 0 the reference edge 1 5 36 974 ns T0 5xUI 36 973 ns 1 ps 2 6 37 776 ns T0 6xUI 37 773 ns 3 ps 3 7 38 577 ns T0 7xUI 38 573 ns 4 ps 4 8 39 378 ns...

Page 84: ...elengths of 1310 nm and especially 1550 nm are sensitive to loss in fiber due to bending of the fiber The fiber bend radius of the GTS1250 fiber input should lay with 1 5 inch bend radius along the fiber s entire length This precaution must be maintained throughout the entire performance verification procedure 3 Connect an SMA cable between the RECOV DATA output of the GBIC Test System and the osc...

Page 85: ...nt of the clock signal is at the center of the graticule grid of the oscilloscope display b Set the Horizontal positioning mode to expand about the CENTER c Set the Vertical Size to 5 mV div set the Horizontal Size to 5 ps div if the waveform was not properly centered adjust the horizontal position slightly to maintain the edge crossing near the center the the display d Define a horizontal histogr...

Page 86: ...ormance Verification GTS1063 and GTS1250 GBIC Test Systems Instruction Manual 69 Figure 31 Random jitter histogram Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 87: ...st System and position it such that the rear panel Remote Interface is facing you NOTE During this test no signal should be attached to the rear panel V_OFF SET signal 4 Connect the DMM common or GND lead to pin 25 of the Remote Interface connector see Figure 32 5 Connect the V lead of the DMM to pin 22 of the Remote Interface connector the V_MONITOR signal for the GBIC _5 V supply 6 Verify that t...

Page 88: ...id injury do not perform any servicing other than that stated in the operating instructions unless you are qualified to do so Refer to all safety summaries before performing any service WARNING Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 89: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 90: ...s are required to replace the fuse Table 21 Required tools for fuse removal and replacement Name Description Screwdriver handle Accepts TorxR driver bits Torque driver Accepts Torx bits can be set up to 4 ft lb T 7 Torx tip Torx driver bit for T 7 size screw heads To replace the power supply fuse 1 Remove the power cord 2 Remove the 8 screws from the top cover See Figure 33 3 Carefully lift the to...

Page 91: ...e Parts section beginning on page 77 8 Reposition the power supply shield back over the Power Supply board 9 Connect the power supply cable to the power supply 10 Connect the TTL remote cable to the main logic board 11 Place the top cover on the bottom cover assembly Check that the plastic power supply shield is tucked inside the bottom cover assembly 12 Insert the 8 machine screws through the top...

Page 92: ...IC Test Systems Instruction Manual 75 Shield Power supply board Rotate shield 90 Logic board Fuse Disconnect cables Disconnect cable Figure 34 Replacing the fuse Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 93: ...ctor J number RECOV CLK Option 01 J12 RECOV DATA Standard J17 RECOV DATA Option 01 J13 Rx DATA J14 Rx DATA J15 EXT DATA IN J11 Tx DATA OUT J16 Tx DATA OUT J24 The 4 may be covered by a component SYNC OUT J9 Tx CLK OUT J22 Tx JITTER IN J6 EXT CLK IN J23 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 94: ...est Systems Instruction Manual 77 Replaceable Parts For information about replaceable parts contact your Tektronix sales representative Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 95: ... GTS1063 and GTS1250 GBIC Test Systems Instruction Manual 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Figure 35 Replaceable parts Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 96: ...GBIC Test Systems Instruction Manual 79 1 Figure 36 Standard accessories 1 2 Figure 37 Optional accessories 1 2 3 4 5 Figure 38 Optional power cords Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 97: ...15 02 11 348 0001 00 4 FOOT CABINET BLACK RUBBER TK2208 ORDER BY DESC 12 211 0730 00 1 SCR MACHINE W WSHR 6 32 X 0 375 PNH STL CDPL T 15 0KB01 ORDER BY DESC 13 200 4563 00 1 COVER BOTTOM AL TEK BLUE PAINT ORS20 TK1943 200 4563 00 14 174 4332 00 1 CA ASSY REMOTE JUMPER RIBBON 28AWG 112CTR 25POS DSUB FEMALE STR2X13 80009 174 4332 00 15 119 4112 00 1 PWR SPLY SWITCHING AUTO IN 85 264VAC 47 440HZ OUT ...

Page 98: ...75MM SQ 250V 10A 99 INCH STR IEC320 RCPT EUROPEAN 2W733 ORDER BY DESC 2 161 0066 10 1 CA ASSY PWR 3 1 0 MM SQ 250V 10A 2 5 METER STR IEC320 RCPT X 13A FUSED UK PLUG 13A FUSE UNI TK2541 ORDER BY DESC 3 161 0066 11 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 METER STR IEC320 RCPT AUSTRALIA 80126 ORDER BY DESC 3 161 0304 00 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 METER STR IEC320 RCPT CHINA 0B445 E13 900 098...

Page 99: ...OSKALOOSA IA 52577 0115 61857 SAN O INDUSTRIAL CORP 91 3 COLIN DRIVE HOLBROOK NY 11741 62712 SEIKO INSTRUMENTS USA INC ELECTRONIC COMPONENTS DIV 2990 W LOMITA BLVD TORRANCE CA 90505 7X318 KASO PLASTICS INC 5720 C NE 121ST AVE STE 110 VANCOUVER WA 98682 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR PO BOX 500 BEAVERTON OR 97077 0001 80126 PACIFIC ELECTRICORD CO 747 WEST REDONDO BEACH PO BOX 10 GARDENA...

Page 100: ... is from left to right and top to bottom The tables are divided into groups of three rows which contain the information shown in Figure 39 Code group name octet value row 10B code group sequence row BERT hex row Figure 39 Long Pattern and Short Pattern table format This row lists the code groups transmitted in time domain order from left to right top to bottom The Octet value 8 bit HEX prior to 8B...

Page 101: ... 23 LONG Continuous Random Test Pattern Data Sequence Preamble and Start of Frame SFD K27 7 FB D21 2 55 D21 2 55 D21 2 55 1101 1010 0010 1010 0101 1010 1001 0110 1010 0101 5B 54 5A 69 A5 D21 2 55 D21 2 55 D21 2 55 D21 6 D5 1010 1001 0110 1010 0101 1010 1001 0110 1010 0110 95 56 5A E69 65 Modified RPAT Sequence Repeated 126 times D30 5 BE D23 6 D7 D3 1 23 D7 2 47 0111 1010 1000 0101 0110 1100 0110 ...

Page 102: ...21 2 55 D21 2 55 D21 6 D5 1010 1001 0110 1010 0101 1010 1001 0110 1010 0110 95 56 5A 69 65 Modified RPAT Sequence Repeated 29 times D30 5 BE D23 6 D7 D3 1 23 D7 2 47 0111 1010 1000 0101 0110 1100 0110 0111 1000 0101 5E A1 36 E6 A1 D11 3 6B D15 4 8F D19 5 B3 D20 0 14 1101 0011 0001 0111 0010 1100 1010 1000 1011 1011 CB E8 34 15 DD D30 2 5E D27 7 FB D21 1 35 D25 2 59 1000 0101 0111 0110 0001 1010 10...

Page 103: ...andom Test Pattern Data Sequence Cont K28 5 BC D16 2 50 K28 5 BC D16 2 50 0011 1110 1010 0100 0101 0011 1110 1010 0100 0101 7C 25 CA 57 A2 K28 5 BC D16 2 50 K28 5 BC D16 2 50 0011 1110 1010 0100 0101 0011 1110 1010 0100 0101 7C 25 CA 57 A2 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 104: ...CJTPAT Compliant Jitter Tolerance Pattern was developed to provide a data stream which would induce large instantaneous phase jumps a modified version of this was also defined in which the format of the pattern was properly encapsulated within a compliant frame structure and is named CJTPAT Compliant Jitter Test Pattern Tables 25 and 26 describe the sequential bit sequence of the CRPAT and CJTPAT ...

Page 105: ...ce of 00001111 For the your convenience the 4 bit sequences of the middle row are grouped into 8 bit bytes in the third bottom row and the BERT hex value to match the LSB first MSB last sequence is listed Table 25 CRPAT Compliant Random Pattern Data Sequence Idle Primitive Repeated 6 times K28 5 BC D21 4 95 D21 5 B5 D21 5 B5 0011 1110 1010 1010 0010 1010 1010 1010 1010 1010 7C 55 54 55 55 Start PF...

Page 106: ...1001 7C 55 65 A5 95 Low Density Transition Pattern Repeated 41 times D30 3 7E D30 3 7E D30 3 7E D30 3 7E 1000 0111 0001 1110 0011 1000 0111 0001 1110 0011 E1 78 1C 8E C7 Transferring from Low to High Transition Densities D30 3 7E D30 3 7E D30 3 7E D20 3 74 1000 0111 0001 1110 0011 1000 0111 0000 1011 1100 E1 78 1C 0E 3D D30 3 7E D11 5 AB D21 5 B5 D21 5 B5 0111 1000 1111 0100 1010 1010 1010 1010 10...

Page 107: ...0111 0001 1110 0011 1000 0111 0001 1110 0001 E1 78 1C 8E 87 Cyclic Redundancy Check CRC D21 7 F5 D14 1 2E D22 7 F6 D29 6 DD 1010 1011 1001 1100 1001 0110 1000 0110 1110 0110 D5 39 69 61 67 End Of Frame Pattern dependent EOFn K28 5 BC D21 5 B5 D21 6 D5 D21 6 D5 1100 0001 0110 1010 1010 1010 1001 1010 1010 0110 83 56 55 59 65 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE ...

Page 108: ...ed clock circuitry to optimize noise and power when no signal is present To use the clock recovery circuitry without a GBIC in the receptacle hold the RX_LOS signal LOW by driving the RX_LOS signal pin 11 of the REMOTE INTERFACE connector low or simply short this pin to GND Proper AC Input Coupling Single ended or Complimentary The internal Min Loss 75 to50 ohm conversion network is a passive netw...

Page 109: ...ting the GBIC receptacle Rx Data pins is to install a standard GBIC into the receptacle and then use the rear panel D25 pin 24 GBICPWR_ENA to shut down the power to the GBIC thereby avoiding the GBIC signals from interfering with the external electrical signal you are inputting to the Rx Data or Rx Data connectors By holding the GBICPWR_ENA signal low or shorting this pin to GND the GBIC will be s...

Page 110: ...th is measured in cycles per second Digital bandwidth is measured in bits of information per second BER An acronym for Bit Error Ratio or Rate The principal measure of quality of a digital transmission system BER is defined as BER Number of Errors Total Number of Bits BER is usually expressed as a negative exponent For example a BER of 10 7 means that on average 1 bit out of 107 bits is in error B...

Page 111: ... Pref Pref 1 mW 0 dBm dBlevel 10 log ǒ level reference Ǔ dBpower 10log ǒPout Pref Ǔ 10log ǒV2 out R V 2ref R Ǔ 20log ǒVout Vref Ǔ V2ref 50ohm 1mW dBmpower 10log ǒPo Pref Ǔ Pref 1mW 0dBm dBm The symbol for power level in decibels relative to 1 mW Demodulation A process whereby a modulated signal is returned to its original form Deterministic jitter The difference between the maximum and minimum dev...

Page 112: ...r is either deleted from the data delivered to the destination with or without an indication that such deletion has taken place or delivered to the destination together with an indication that it is in error Error Rate The ratio of the number of data units in error to the total number of data units Fiber optics A method of transmitting information in which light is modulated and transmitted over h...

Page 113: ...urce and destination address data control an identification number and error control informa tion Packet Switching A technique in which data is sent in fixed length packets Each packet is sent separately and may be interspersed with packets from other locations PRBS Pseudo random binary pulse sequence A repeating bit pattern that appears to be random The bit pattern is used for telecommunications ...

Page 114: ...nt where information enters or leaves a communications network An input or output device designed to send or receive data Tip One of a pair of conductors associated with telecommunications Transmission system Facilities to transfer information from one location to another using copper conductors fiber or microwave radio Twisted Pair This term describes the traditional copper cable used for short d...

Page 115: ...Glossary 98 GTS1063 and GTS1250 GBIC Test Systems Instruction Manual Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 116: ...nsmission system 94 E Echo 95 ECL 95 Emitter coupled logic 95 Error detection 95 Error rate 95 Errored second 95 ES 95 EXT 13 EXT DATA IN 15 External clock enable 18 External data in 15 F Fiber optics 95 Fiber optics transmission system 95 FOTS 95 FRNT_PNL_LOCK 18 Front panel 1 10 Fuse 4 Fuse removal 73 Fuse replacement 73 G GBIC 5 95 Communication 21 Installation 5 Receptacle 22 Serial ID 21 MOD_...

Page 117: ...inistic jitter 61 Equipment required 44 Fast deterministic jitter 58 GBIC port Vdd default voltage 70 Recovered clock and data random jitter 67 Recovered data and clock output levels 50 Setup for PV 46 Test record 45 Tx CLK to data random jitter 54 Tx Data and clock output levels 46 Tx Data duty cycle 52 Power connector 5 Power cord optional 79 Power off 7 Power on 6 Power up defaults 7 PRBS7 11 P...

Page 118: ...OUT 15 T Telecommunications 97 Terminal 97 Test Record 45 Performance Verification 45 Test record 45 Tip 97 Transmission system 97 Transmit pattern selection 23 Transmit patterns 11 CJTPAT 12 CRPAT 12 D21 5 11 EXT 13 K28 5 12 K28 7 11 LONG 12 PRBS7 11 Selection 10 18 SHORT 12 Transmit signal Adding jitter 25 Transmit signals 15 EXT DATA IN 15 Jitter 25 SYNC OUT 15 Tx CLK OUT 15 Tx DATA 15 Tx JITTE...

Page 119: ...Index 102 GTS1063 and GTS1250 GBIC Test Systems Instruction Manual Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 120: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

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