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16 August 06 FDM-FSK Preliminary User Guide

 28 

 

Dwg: A01230

 

Daisy Chain Operation       
 
 

a)

 

Single String Daisy Chain 

 
 
 
 
 
 
 
 
 
 
 

 

 

This configuration is used when there is no fiber ring available, only one pair of 
fibers available from controller to controller, a typical application would be a 
TMC feeding an arterial string and terminating at the far end. 
 
Note:  This configuration has no redundant path, any failure along the string will 

cut off all down stream communications past the point of failure.

 

 

Modem DIP Switch Settings for 9600 8N1 

 
The Dip Switch settings listed below show what would be required to set the 
modems to operate at 9600baud 8N1, this is a typical setting for the traffic 
industry, all other switch positions not shown are in the Off position or “other 
selection”.  

Note: 

   

•

 

Anti-Streaming is “always off” at a Master, optional for all Slave 
Modems.    

 

Master Modem 

Middle Slaves 

End Slave 

Master 

Slave Slave Slave 

2 Ring 

2 Ring 

2 Ring 

2 Ring 

Daisy Chain * 

Ring 

Ring 

Daisy Chain * 

RS232 RS232 RS232 RS232 
9600 9600 9600 9600 
None None None None 
RTS/CTS RTS/CTS RTS/CTS RTS/CTS 
CTS-0ms CTS-0ms CTS-0ms CTS-0ms 

Off 

Anti-Stream Anti-Stream Anti-Stream 

N.A. 

2 Seconds 

2 Seconds 

2 Seconds 

Aux Port Normal 

Aux Port Normal 

Aux Port Normal 

Aux Port Normal 

 
 

T1 

FDM  

Master 

R2 

TMC 

Computer 

DATA 

R1 

FDM  

Slave 1 

RTU / 

Controller 

T1 

R2 

T2 

RTU / 

Controller 

FDM  

Slave 2 

FDM  

Slave 3 

RTU / 

Controller 

T1 

R1 R1 

R2 

T2 T2 

Содержание FDM-FSK

Страница 1: ...6 August 2006 GDI COMMUNICATIONS LLC PO Box 1330 280 I 80 Exit 1 Verdi NV 89439 Phone 775 345 8000 Fax 775 345 8010 Email support sgdi com FDM FSK Fiber Optic Modem With Built in Model 4xx Series FSK Modem USER GUIDE FDM Series All Fiber Topologies Compliant ...

Страница 2: ...XD 6 CTS 7 RTS 8 MODEL FDM170 GDI Communications LLC Verdi NV 89439 775 345 8000 IN O U T R 1 T 2 T 1 R 2 M O D E M FIBER STATUS PWR FAIL 1 8 ENABLE DISABLE BATTERY AUX CONN FDM2SA GDI Communications TXD RXD Data Ports KOD RTS Anti Strm Reset T1 R2 R1 T2 LOS LOS Main DC Power Center Battery Alarm Charging RING 2 RING 1 R1 R2 T2 T1 LOS LOS PWR RING STATUS MAIN DATA ALARM RESET ANTI STREAM AUX DATA ...

Страница 3: ...em Displays 9 Data Port Activity Display 9 TXD LED 9 RXD LED 9 Data Port Anti Streaming 9 Reset Switch 9 Intuitive Fiber Status Displays 9 Fiber Identification 9 Fiber Status Displays for Redundant Rings and Daisy Chains 10 Fiber Status Displays for Single Rings 10 2 4 Wire LED Displays 11 CD Carrier Detect 11 KOD Key On Data 11 RTS Request To Send 11 CTS Clear To Send 11 TXD Transmit Data 11 RXD ...

Страница 4: ...tches 17 Master Salve 17 Topology Selections 17 2 Rings Self Healing Dual Counter Rotating Rings 17 1 Ring 17 Daisy Chain 17 Data Protocol RS232 422 18 Baud Rates 18 Parity 18 RTS CTS Handshaking 18 CTS Delay 18 Anti Streaming 19 Optical Dynamic Range 19 Fiber Identification Techniques 20 Fiber Applications 21 Self Healing Dual Counter Rotating Ring Operation 21 Single Ring Operation 23 Point to P...

Страница 5: ... RTS to CTS Time 35 Carrier Turn Off Time 35 Local Echo 35 Receiver Squelch Time 35 Carrier Detect Time 35 Load Compensation 35 FSK Applications 36 Half Duplex Operation 2 Wire One Pair 36 Full Duplex Operation 4 Wire 2 Pairs 37 A Word on Dynamic Range 38 Combined FDM and FSK Applications 39 Fiber to Copper to Fiber Copper Bridge Application 40 Copper to Fiber to Copper Fiber Bridge Application 40...

Страница 6: ...The FDM FSK is a combination of a FDM2SA and a FSK modem 6 The FDM SSR is a combination of a FDM2SA and a Spread Spectrum Radio The modems can operate in many different topologies even on a simple fiber ring when there is only one fiber available later as more fibers become available simply flip a switch to change to the new topology This unique capability of operating in multiple topologies offer...

Страница 7: ...ns This Dynamic CD acts like a DTE s RTS and is used to initiate handshaking to a DCE s RTS input The FDM Series represents a new generation of digital fiber optic modems utilizing a Replaceable Operating System ROS As requirements change or new features become available a new program can be loaded so as to provide a migration path to upgrade the existing system FDM170 This is a Plug In version fo...

Страница 8: ...ns FDM2SA This is the Stand Alone version and has two Data Ports one designated as the Main Port the other being an Auxiliary Port The Main Data Port is used for connection to a controller The Auxiliary Data Port can be used for many associated functions such as connecting to a Backup Server or for Over the Air Restoration or combining external data links into the polling stream A unique built in ...

Страница 9: ... directional communications between Fiber and FSK The FSK Modem can communicate in 2 Wire Half Duplex or 4 Wire Full Duplex at baud rates up to 19 2Kbt s depending on which FSK Modem is installed The FSK modem is 100 compatible with all GDI modems The FSK section allows a number of options Connecting a remote copper 2 4 wire circuit into the fiber system and back to City Hall Connecting a remote f...

Страница 10: ... DB9 typically connects to the local controller while the Auxiliary RJ45 connector can be used to bring in radio based communications into the main data stream The FSK Port can operate in 2 or 4 wire mode Half Full Duplex and is 100 compatible with all GDI FSK Modems The FDM FSK has three mounting options left or right wall mounting via a pair of Keyhole slots on both sides or as a Stand Alone she...

Страница 11: ...t displays show information as to the integrity of the fiber system each of the red segment lines represent the incoming or outgoing fiber data path through the modem while LOS indicates a loss of incoming optical signal Fiber Identification Identifying whether a fiber has Receiver 1 or Receiver 2 traffic is as simple as plugging in and out each fiber into any receiver the modem will flash the mes...

Страница 12: ...edundant Ring Displays Common Displays Daisy Chain Displays Loss of Signal Causes Local LOS and Fold Back to Flash Ring Alarm Condition Normal Display Displays not Flashing T1 R2 R1 T2 LOS LOS T1 R2 R1 T2 T1 R2 R1 T2 T1 R2 R1 T2 Loss Of Signal LOS LED s Flashing LOS LOSS of R1 causes R2 T2 Foldback First Modem set to Daisy Chain Last Modem set to Daisy Chain T1 R2 R1 T2 T1 R2 R1 T2 LOS LOSS of R2 ...

Страница 13: ...wer state of the FiberHub The DC Power Center provides information on the status of the optional internal Uninterrupted Power Supply UPS such as incoming Main power battery Charging full and trickle charge Alarm no external power and Battery power only If the modem is equipped with an optional internal UPS and power fails the supported modem s will be fully operational until the batteries are depl...

Страница 14: ...cates external power has failed Rear Panel The rear panel is where the Fiber Optic Data FSK 2 4Wire and Power connections interface to the modem note that the fiber connections logically match the front panel fiber displays The FSK connection diagram illustrates how to correctly connect 2 or 4 wire copper applications Power Connections The modem can be connected to an external 24VDC UPS via the DC...

Страница 15: ...ics from damage due to external dirty or damaged patchcords Bottom Panel This panel is where the FDM FSK is set up for Fiber and FSK Operation Data rates on both the FDM and FSK modems must be the same for obvious reasons Pin out connection diagrams are also included on this panel to assist the technician when making interconnect cables The FSK Connections are shown on the rear panel Switch settin...

Страница 16: ... the FSK Ports Response Data entering the Remotes Main Auxiliary and FSK Ports is transmitted back to the Master Modem At the Master Modem Response Data from the Remotes is passed to the Masters Main and Auxiliary Ports and back to the Servers FDM FSK FDM Series FSK 2 or 4 Wire Main Port Aux Port Main Port Aux Port FDM Main Port Fiber Optics Aux Port TMC or Street Master Remote Controller Location...

Страница 17: ...ions it can be shelf mounted as a Stand Alone or hang on a cabinet wall utilizing a pair of Keyhole slots Both sides have pairs of keyhole slots for left or right wall mounting so as to maintain the desired front or rear panel view hole centers are at 7 5inches DTE Aux Port DCE AB Fiber Lines Data Flow 3 TXD 6 TXD 2 RXD 5 RXD 7 RTS 8 RTS 8 CTS 7 CTS Main Port DB9F Aux Port RJ45 Local Controller DT...

Страница 18: ...me Carrier Detect Load Compensation It is suggested that you first configure the FDM Modem and then configure the FSK Modem Slave Off 1 Ring Ring RS485 Off Off Off Off Off Off Off Parity None Odd Even RTS CTS Off CTS 0ms 8ms Ant Strm Off 2 4 8 18 32 64 Off Aux Port DCE DTE Master Aux Master 2 Rings Daisy Chain RS232 1200 2400 9600 19 2Kbts 38 4Kbts 57 6Kbts 115 2Kbts Port Switch Assignment Data Po...

Страница 19: ...the Primary Master location the Auxiliary Master will automatically take over the operation of the fiber system then automatically hand back control when the Primary TMC is back on line Topology Selections Please note that you can have any combination of the following topologies just mix or match see Fiber Applications on page 21 for examples 1 2 Rings Self Healing Dual Counter Rotating Rings This...

Страница 20: ...Even selected For no Parity select None RTS CTS Handshaking When Handshaking is turned Off data arriving at either data port from the attached devices will be transmitted over the fiber When Handshaking is turned On and RTS is high or raised data arriving at either data port from the attached devices will be transmitted over the fiber When RTS is low no data will flow CTS Delay The RTS to CTS dela...

Страница 21: ...TE Options The FDM FSK is primarily designed for Slave applications therefore this selection is left in the DCE mode Optical Dynamic Range For any system to work reliably there must be adequate signal level at the receiver The modem must have a larger Dynamic Range expressed in db than the cables end to end attenuation db All Singlemode FDM series have 25DB of dynamic range Steps necessary to dete...

Страница 22: ...nect the two fibers into T1 and R2 2 At the next location power up the modem and connect each patchcord one at time into R2 When the modems display indicates 1 insert this fiber into R1 3 The remaining three patchcords are then rotated through T2 until you see the a Daisy Chain display b Or if you have the Slave set to 2 Rings you will see a Fold Back display You will now have Fiber communications...

Страница 23: ... illustration on the next page Modem DIP Switch Settings for 9600 8N1 The Dip Switch settings listed below show what would be required to set the modems to operate at 9600baud 8N1 this is a typical setting for the traffic industry all other switch positions not shown are in the Off position or other selection Master Modem Slave Modem Master Slave 2 Rings 2 Rings RS232 RS232 9600 9600 None Parity N...

Страница 24: ...ays once a second to indicate a ring fold back has taken place The above diagram shows a catastrophic event at Slave 2 with the resulting graphics displays below R1 T1 T1 T1 T1 R1 R1 R1 FDM Slave 1 FDM Slave 3 DATA See Ring Status Displays Below R2 R2 R2 T2 T2 T2 T2 R2 RING 1 RING 2 RTU Controller RTU Controller TMC Computer FDM Master RTU Controller FDM Slave 2 T1 R2 R1 T2 LOS LOS Normal Fiber St...

Страница 25: ...urity of all configurable systems should the ring be broken then the system will collapse Modem DIP Switch Settings for 9600 8N1 The Dip Switch settings listed below show what would be required to set the modems to operate at 9600baud 8N1 this is a typical setting for the traffic industry all other switch positions not shown are in the Off position or other selection Master Modem Slave Modem Maste...

Страница 26: ...hen this condition occurs all displays will flash the modem that has lost it s input will flash a Loss Of Signal alarm LOS The following displays indicate a progressive build out of a Single Ring T1 R1 LOS T1 R1 LOS T1 R1 LOS T1 R1 LOS T1 R1 LOS T1 R1 LOS T1 R1 LOS T1 R1 LOS T1 R1 LOS Master Master Master Master Slave 1 Slave 1 Slave 2 Slave 1 Slave 2 T1 R1 LOS Slave 1 ...

Страница 27: ...N1 The Dip Switch settings listed below show what would be required to set the modems to operate at 9600baud 8N1 this is a typical setting for the traffic industry all other switch positions not shown are in the Off position or other selection Master Modem Slave Modem Master Slave 1 Ring 1 Ring RS232 RS232 9600 9600 None None RTS CTS RTS CTS CTS 0ms CTS 0ms Off Anti Stream 2 Seconds Aux Port Norma...

Страница 28: ...cally recover via the other cable Modem DIP Switch Settings for 9600 8N1 The Dip Switch settings listed below show what would be required to set the modems to operate at 9600baud 8N1 this is a typical setting for the traffic industry all other switch positions not shown are in the Off position or other selection Master Modem Slave Modem Master Slave 2 Ring 2 Ring RS232 RS232 9600 9600 None None RT...

Страница 29: ...lure of any receive fiber would cause the following fold back indication to be displayed T2 T1 R2 R1 T2 T1 R2 R1 T2 T1 R2 R1 T2 T1 R2 R1 T2 T1 R2 R1 T2 T1 R2 R1 T2 T1 R2 R1 T2 T1 R2 R1 LOS LOS LOS LOS T1 R2 R1 T2 LOS LOS Fiber Status Normal T1 R2 R1 T2 LOS LOS Fiber Status Normal ...

Страница 30: ... set the modems to operate at 9600baud 8N1 this is a typical setting for the traffic industry all other switch positions not shown are in the Off position or other selection Note Anti Streaming is always off at a Master optional for all Slave Modems Master Modem Middle Slaves End Slave Master Slave Slave Slave 2 Ring 2 Ring 2 Ring 2 Ring Daisy Chain Ring Ring Daisy Chain RS232 RS232 RS232 RS232 96...

Страница 31: ...t this indicates that the break is between the two modems also note the fold back symbol indicates the modem has communications to its adjacent modems but not across the break The down stream isolated modems are in communications with each other and will automatically come back on line when the break is repaired T1 R2 R1 T2 LOS LOS Middle Slave s T1 R2 R1 T2 LOS LOS T1 R2 R1 T2 LOS LOS End Slave T...

Страница 32: ...ing Displays Note at the Master Modem you need to switch it to Center Master by selecting C Mast 64 as well as Daisy Chain Anti Streaming is not used at a Master location End Slave Master Modem Middle Slaves End Slave Modem Slave Master Slave Slave 2 Ring 2 Ring 2 Ring 2 Ring Daisy Chain Daisy Chain Ring Daisy Chain RS232 RS232 RS232 RS232 9600 9600 9600 9600 None None None None RTS CTS RTS CTS RT...

Страница 33: ...ying FSK Digital information is binary in format that is data is represented by either logic high or logic low 1 or 0 Communications terminology refers to logic Low as Mark and logic High as a Space FSK Modems utilize this fact and generate a unique frequency for each logic level Each model in the 4xx series have their own unique set of frequencies due to the baud rate therefore only modems of the...

Страница 34: ...er Squelch and raise CD at the data port This CD signal advises the Controller to expect data The demodulated Mark tone logic 0 is passed to the RS232 Data port where it does not change state due to the fact that when not in use it is always at logic 0 same as the transmit end Now let s go back to the TMC end 3 Once the TMC computer receives CTS clear to send it will send data to the modem At this...

Страница 35: ...he fact that when not in use it is always at logic 0 same as the Controller end Now let s go back to the Controller end 4 Once the Controller receives CTS clear to send it will send data to the modem At this juncture both modems on the system are in a go state 5 The Controller now sends data 0 s and 1 s to the modem which converts it to Mark and Space frequencies These frequencies tones are then t...

Страница 36: ...to the Fiber Optic Modem Transmit Data TXD LED This indicates data is being transmitted from the Fiber Optic modem to the FSK Modem Receive Data RXD LED This indicates data is being received from the FSK Modems 2 4 Wire circuits Key On Data KOD This indicates Data from the fiber is asserting Keying the FSK Modem s RTS Rear Panel Copper FSK This is where the modem connects to the private wire metal...

Страница 37: ...receivers output to the digital circuits this can be set for 8 or 4ms Load Compensation Normally this is set to 600 Ohm to match the line impedance Switching to High increases the gain of the receiver and is only used when the receive signal is so low it causes data errors Slave Off 1 Ring Ring RS485 Off Off Off Off Off Off Off Parity None Odd Even RTS CTS Off CTS 0ms 8ms Ant Strm Off 2 4 8 18 32 ...

Страница 38: ...e only to the OUT terminals on all modems To shorten up this round trip delay time and therefore speed up the system response it is necessary to go to a 4wire operation next page The DIP Switch diagram shows where the adjustments are made to operate in either 2 or 4 wire mode The settings shown here are for 2 Wire which is Half Duplex operation note you may change various timing parameters to bett...

Страница 39: ...s AUDIO IN The Response AUDIO OUT from the Locals connects to the FDM FSK AUDIO IN The DIP Switch diagram below shows where the adjustments are made to operate in the 4 wire mode The settings shown here are for 4 Wire which is Full Duplex operation note you may change various timing parameters to better suite your systems requirements KOD internal jumper J5 must be ON This is confirmed when the fr...

Страница 40: ...t pairs due to high levels or a short between adjacent pairs 5 Induced noise due to poor grounding of the cable cabinet 6 Baud Rates as the frequency goes up the transmission distance decreases 1200 baud may go 20 miles while 19200 baud on the same cable pair will typically be less than 10 miles Pushing the Envelope Making the Last Mile Additional distance can sometimes be obtained by boosting the...

Страница 41: ...Local Controller RS232 Local Controller RS232 Dual Counter Rotating Ring Fiber Fiber FDM Series T1 R1 R2 T2 FDM FSK Series Local Controller RS232 T1 R2 R1 T2 FDM FSK Series 2 4 Wire FSK 2 4 Wire FSK T1 R2 R1 T2 FDM Series RS232 SSRadio SSRadio Local Controller RS232 T1 R2 R1 T2 FDM Series Local Controller RS232 T1 R2 R1 T2 FDM Series Local Controller RS232 T1 R2 R1 T2 T1 R2 T2 R1 FDM FiberHub Port...

Страница 42: ...ms to the new fiber system Note the Master is at the start of the new fiber system 2 or 4 wire OUT IN 4xx Modem FSK R1 T2 FDM T2 R1 FSK T1 R2 FDM FDM Series FDM Series T1 R2 T1 R2 R1 T2 R1 T2 OUT IN 4xx Modem Copper Bridge FDM170 FDM2SA FDM2070 FDM SSR FDM FiberHub FDM FSK FDM FSK To TMC or Street Master Master Slave Slave Slave Fiber Fiber To TMC or Street Master 2 or 4 wire Copper T2 R1 FDM Seri...

Страница 43: ... to be on all the time this is normal for 4wire head ends 2 Wire Systems Because you have only one pair of wires that is time shared between transmit and receive transmissions you must set the jumper JP5 to KOD ON When data is detected coming from the fiber DCD KOD keys the 2 wire transmitter and broadcasts onto the copper pair After the data stops DCD is lowered which turns of the transmitter and...

Страница 44: ...ds max time 126 sec Slave Off 1 Ring Ring RS485 Off Off Off Off Off Off Off Parity None Odd Even RTS CTS Off CTS 0ms 8ms Ant Strm Off 2 4 8 18 32 64 Off Aux Port DCE DTE Master Aux Master 2 Rings Daisy Chain RS232 1200 2400 9600 19 2Kbts 38 4Kbts 57 6Kbts 115 2Kbts Port Switch Assignment Data Port Pinouts RS 232 RJ45 Auxiliary 1 8 2 DCD 4 GND 5 RXD 6 TXD 7 CTS 8 RTS NO CONNECTION PINS 1 3 DCD RXD ...

Страница 45: ...to 5Vdc this is used to assert RTS on an attached modem Use only at a 4W Master location or two modems point to point 4W 2 It can assert DCD dynamically before data then de assert DCD after data this is used to handshake the built in FSK modem Use at a 2W Master or 2 or 4W Slave location Fiber Optics Fiber Optics DIP Switches JP 5 Aux Ports Pin 2 Functions DCD or KOD Selection KOD ON DCD ON 5V ...

Страница 46: ...width world of Singlemode fibers the core size is 80 smaller than the fibers diameter of 125 microns and measures less than 10 microns across It should now be obvious that a spec of dust invisible the naked eye can prevent your communications system from working so KEEP IT CLEAN Materials needed to clean Optical Patchcords 1 Wet Method Typically these are lens grade tissue pre moistened with a sol...

Страница 47: ...panel or transmission equipment WARNING Invisible Laser Energy Can Damage Your Eyes Do not look into the end of an Optical Connector that is attached to a fiber it may be emitting potentially harmful energy that can damage your eyes first disconnect the other end or turn the power Off on the transmitting device Do not look into the transmitting port of an Optical Transmitter with out first turning...

Страница 48: ...te it and render it useless Using this clean pad clean the end face of the ferrule and its circumference Do not be afraid to apply pressure when cleaning use the same pressure as if you were cleaning eyeglasses 4 Using the Air Duster use a single short burst to clean and dry the ferrule before starting the re connecting process Do not touch the ferrule again as you might contaminate it 5 Remove th...

Страница 49: ...e may not be copied or published without the written consent of GDI Communications LLC Verdi Nevada The contents of this user guide are deemed to be correct at the time of publishing and are offered as a guide only GDI Communications LLC is not liable for any inaccuracies or omissions ...

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