Home

Canoga Perkins 2270 Fiber Optic Modem User Manual

1. 3 7 Programmable Buffered Interface Model P53 External Station 3 8 Internal Programmable Buffered Interface Model P53 RS 530 3 9 External Programmable Buffered Interface Model P53 3 10 Programmable Buffered Interface Model P53 DTE 3 11 Programmable Buffered Interface Model P53 Legacy Adapter 3 12 BNC and Four TwinAx Connectors BJ 77 Type eese eere eee nosna tna tnnn 3 13 Five TwinAx Connectors BJ 77 Type aeree eee eee eee ee eene ente nosno a nonno one tn setas tnne 3 14 Interface Card Installation eene eren en nine Poena r pa bee INR rsss eu osise issor eV Me 4 1 2270 Circuit Block Diagram eeeeeee eese eee eene einen t tnis tense ts tasas tassa seta conos 4 2 Typical High Speed 2270 Modem Application 4 3 Data Organization with PWM Optics eese eese eee eene eene neta sins nona tassa setas nne 5 1 System Loopback Test Example From User End of Fiber Link eee 5 2 Bi Directional Local Loopback Active 5 3 Interface Only Local Loopback Active 5 4 Optical Only Remote Loopback Active 5 5 Bi Directional Only Remote Loopback Active 5 6 Optical at Local End Loopback Active ssscssssscsssssssssesssssssesssessessecnsesessessseseesso
2. eee CCITT V 35 Digital Interface and Pin Assignments Delay Times for Programmable Buffered Interface Strap Configurations for Programmable Buffered Interface erect 37 TwinAx and BNC Supported Signals ceca eee eee ee sees eene enn onne on tns sn natns ennt tuse ens ona sanena 44 Model Characteristics Jumper Strap Options Models D22 and D88 Connector Pin Assignments eese esee eee eee ee eene ense natns tuns netus anna 47 Loopback Options 54 Data 2270 j Fiber T m Modem FT Canoga Perkins Chapter 1 General 1 1 Equipment Description The 2270 is a high speed modem for full duplex operation over fiber optic cable It operates syn chronously up to 20 Mbps and asynchronously up to 5 Mbps in the sample data mode with a 25 jitter limit The 2270 is available in rack mount and standalone configurations Both are intended to operate with a variety of electrical interfaces refer to Section 7 5 2270 Fiber Optic Modem Configurations for a listing of the interface options for the 2270 Refer to Section 3 for detailed descriptions of available I O interfaces The 2270 has integral System Test and loopback diagnostic modes for performance monitoring Various 2270 configurations provide local modem controls including those listed in Table 1 A A limited form of end to end control lead operatio
3. MIL 188 KG Figure 4 2 H MIL 188 C Typical High _ Crypto Speed 2270 Graphic Fiber Optic Link Modem Iber Optic Lin Satellite 22 2270 Application 70 Earth Station Host CPU 4 3 Transmit Section The data and clock signals input to the interface are converted to 5V logic signals for use by the modem circuit These signals then pass through the loopback and test pattern selectors to be processed by the clock correction circuit Above 9 Mbps the duty cycle of any transmit clock is corrected to approximately 50 The logic signals are then converted to the ECL signals used for modulation This modulation uses a proprietary pulse width PWM encoding scheme This signal drives the laser modulator to generate the optical signal for transmission over the fiber optic cable This optical signal and the standard A Lead interface voltage signals can be seen in Figure 4 3 Note how the pulsed light transitions relate directly to the actual data being transmitted and to the clock input from the modem The fast modulation used in the 2270 provides short 6 18 nanosecond pulses These pulses are realized on every clock edge and the pulse width is dependent on the actual data being trans mitted The time between these pulses is appropriate to the speed at which the data is being transmitted Below 9 Mbps the pulse positions are also sensitive to the duty cycle of the trans mit clock 4 4 Receive Section The dut
4. 2270 Fiber Optic Modem RS 232C RS 423 RS 422 V 35 DS1 T1 TTL BNC Programmable Buffered RS 530 Mil Std 188 114C RS 530 Transparent T1 E1 50 20 6 5 Mbps to 20 Mbps 50 25 less than 6 5 Mbps Interface Connector female DB 25 female DC 37 female 34 pin Winchester four position barrier strip four male BNC coaxial connectors four or five male twinaxial connectors BJ 77 female DA 15 two male BNC connectors 115 VAC 10 0 22 Amps max 230 VAC 0 11 Amps optional max 47 to 63 Hz both 48 VDC nom 5 Amps 8 50 W x 12 8 D x 2 5 H inches 19 0 W x 8 75 D x 12 0 H inches 19 0 W x 12 75 D x 3 5 H inches 7 8 W x 12 50 D x 1 0 H inches 3 63 pounds 0 50 pounds 9 0 pounds each 3 0 pounds each 7 70 pounds 3 0 pounds 0 16 pounds 61 Canoga Perkins Operating Environment Temperature 0 to 50 C Humidity 0 to 95 non condensing MTBF 62 500 hours calculated 7 5 2270 Fiber Optic Modem Configurations 2270 S XXX XX XX X S STANDALONE 2270 R XXX XX f R RACK MOUNT POWER OPTIONS 0 N A 1 120 VAC 2 240 VAC IN LINE 3 48 VDC CRYSTAL OPTIONS 00 NO CRYSTAL 01 21 504M 02 24 704M 03 16 384M 04 25 248M 05 13 824M 06 921 6K 07 7 373M 08 40 00M DEFAULT CRYSTAL 09 12 928M 10 6 144M 11 25 856M 12 230 4K 13 24 576M FIBER OPTIONS MULTIMODE 01 850 nm ST 6 dB loss budget SINGLE MODE 11 1310 nm ST 15 dB loss budget 13 1310 nm FC PC 15 dB
5. 56 00K 64 33K 65 75K 00000000 00000000 OSCILLATOR FREQUENCY 21 504M 24 704M 16 384M 25 248M 13 824M 921 6K Switch Setting 2200 C 07 2200 C 08 2200 C 09 2200 C 10 2200 C 11 2200 C 12 2200 C 13 1 2 12 928M 12 288M 6 464M 6 144M 3 232M 3 072M 1 616M 1 536M 538 7K 512 0K 269 3K 256 0K 134 7K 128 0K 67 33K 64 0K 00000000 0000000 00000000 OSCILLATOR FREQUENCY 12 928M 25 856M 24 576M 21 Canoga Perkins To accomplish this the SCT POL jumper needs to be changed The position set at the factory is NORM which assumes a negligible delay in the cable and DTE user device The INV position can improve performance if that delay is an odd multiple of one half a clock period Using an oscillo scope the SCT and TXD A lead waveforms can be examined to confirm that the falling edge of the clock does not occur close to the changes in TXD If this edge is too close to the data transitions the INV position must be used NOTE This will not change the SCT to TXD phase relationship viewed on the interface but will compensate for the phasing problem 2 7 7 2 SCT Returned On External Clock Leads If the DTE is capable of returning the transmit clock supplied by the modem back to the modem on the SCTE leads as an external transmit clock better clock data phasing can be achieved at the transmitter This can result in a significant improvement at higher data rates Close switch position 4 on the front panel for the modem to use
6. center tap to shield ground W3 W4 jumper option may not exist on some older versions It is only required when performing Local loopbacks The W4 position corrects the duty cycle of External Clock above 9 Mbps 3 10 1 Model TW The signaling used on this interface is RS 422A Four TwinAx connectors BJ 77 type are used for the physical connection see Figure 3 12 Aswitch is provided to select whether the fourth TwinAx SCT SCTE is to be used as an output SCT or as an input SCTE By setting the switch to the SCT position the port becomes an output providing the clock to the connected device When set for SCTE the port becomes an input and will accept a clock from the connected device SCT should be selected if the modem is set for Internal or Slave Clock mode SCTE should be selected if the modem is set for External Clock mode NOTE The SCT output cannot be returned on the SCTE leads to eliminate propagation delay problems with this interface 45 Canoga Perkins Receiver Clock Received Data Transmitted Data External Transmitter Clock or Transmitter Clock 3 10 2 Model TW8 The signaling used on this interface is Mil Std 188 114C Four TwinAx connectors BJ 77 type are used for the physical connection see Figure 3 12 A switch is provided to select whether the fourth TwinAx SCT SCTE is to be used as an output SCT or as an input SCTE By setting the switch to the SCT position the port becomes an
7. 10ns 12ns 14ns 16ns 18 ns 20 ns 22 ns 24 ns 26 ns 28 ns 30 ns 32 ns 34 ns 36 ns 38 ns 0000000000000000 27 Canoga Perkins 3 5 RS 530 Interface Model R30 The EIA RS 530 interface uses RS 422 balanced electrical signals for all interface circuits data clock and control except for the loopback local remote and test mode pins which use RS 423 unbalanced bipolar electrical signals The DB 25 pin assignments and signals supported are detailed in Table 3 F Jumper options are detailed in Table 3 G Normally the control leads RTS CTS DSR and TM are supported locally i e no end to end connectivity RTS can be used to control DCD at the far end if the 2270 is set for flow control NOTE DTR to RI is not supported on the 2270 A 3 5 mm stereo phone jack is provided for an alarm contact output for 2270 applications This contact is controlled by the presence of CD Optical Receive Carrier Detect If CD is not valid or power is lost the relay is in the alarm state A jumper RLY controls the selection of either the open or closed state This is a three contact jack The alarm circuit is present between the tip and sleeve contacts The contact rating is 24VAC or 24VDC at 0 5A Table 3 F RS 530 Signals and Pin Assignments Frame Ground Transmit Data to modem Receive Data from modem Request to Send to modem Clear to Send from modem Data Set Ready from modem Signal Ground Data Carrier Detect from mode
8. B RXD A RXD B TXD A TXD B SCTE A SCTE B SCT A SCT B SIGNAL GROUND FRAME GROUND NOTE These pin assignemnts do not correspond to RS 449 47 Canoga Perkins 3 11 Interface Reconfiguration Figure 3 14 shows how the interface circuit board fits into the larger main modem board opening A header type connector is provided to connect the two circuit boards together The interface board may be removed by loosening the two retaining screws and nuts then pulling the board outward from its connector Once a replacement board is in position the two flanged lock nuts and bolts are secured with built in flat washers above and below the board junctures It may be desirable to select a new data rate at this time using the front panel switch L rum im m 3 12 Standalone Reconfiguration To access the circuit board on a standalone unit the enclosure cover must first be removed by loosening the six screws on the sides of the unit Next unplug the power supply connector from the PC board and remove the two screws holding the rear panel in place Figure 3 14 Inteface Card Installation gt The entire circuit board may now be removed by loosening the eight mounting screws The inter face board may now be changed as outlined in Section 3 11 Interface Reconfiguration The rear panel supplied with the new interface must also be exchanged with the original rear panel Simpl
9. INTER NAL and the Clock Rate to the highest frequency setting switch positions 1 3 all closed This allows fora maximum asynchronous rate of one quarter of the internal clock frequency For example if a 2200 C 08 oscillator is used the maximum frequency is 20 Mbps and the highest asynchronous data rate would be 5 Mbps This maximum is based on the assumption that a maximum of 25 peak to peak jitter is allowable in the received data signal This particular configuration is called Sampled Asynchronous Transmission It requires configur ing the modem for internal clock and connecting data signals to the normal data input output pins 2 7 4 Data Rates The maximum data rate permissible depends on the type of interface used Only the special high speed interfaces can be operated above 10 Mbps Data rate selection for the 2270 Modem is accomplished by using the front panel switches see Figure 1 1 Table 2 B provides a data rate table for use in selecting a specific rate in relation to the crystal oscillator factory installed in the modem The oscillator frequency is marked on the case of the crystal Special oscillator frequencies may be requested if needed 2 7 5 Data Rate vs Module Frequency If a high speed interface is exchanged for a low speed version or vice versa it may be necessary to make an oscillator change on the main modem circuit board Table 2 B lists the standard oscillators or you may contact the factory for application
10. Interface Composite Error Rate 1 in 10 or better Fiber Optic Cable Compatibility 50 to 62 5 micron multimode or 8 to 10 micron single mode fiber Transmitter Type LED 850 nm Laser diode 1310 nm HI LO Optical Power Switch HP Laser Model Only Reduces Peak Modulation Intensity by at least 3 dB Wavelength 850 nm LED Model 1310 nm Laser Models Fiber Optic Connectors ST or FC type Fiber Optic Receiver PIN diode Transmission Code Pulse Width Coding Fiber Optic Transmission Specifications All powers are measured at 20 Mbps unless noted High Power HP Laser Optical Launch Power gt 6 dBm HI Tx at 20 Mbps 11 to 8 dBm LO Tx at 20 Mbps Low Power LP Laser gt 8 dBm at 20 Mbps 850 LED gt 14 dBm at 20 Mbps Fiber Optic Link Loss Budget 850 nm LED 26 dB 62 5 125 MM fiber 1310 nm HP Laser 215 dB SM fiber 1310 nm LP Laser 210 dB SM fiber 60 7 3 System Electrical Interfaces Supported Duty Cycle for Clock Input Interface Type RS 232C 423 Programmable RS 530 RS 530 RS 422 Mil Std 188 114C CCITT V 35 DS1 T1 B2 TTL BNC RS 422 Mil Std 188 114C B1 B3 Power Requirement Standalone Standard Optional Optional 7 4 Physical Dimensions Standalone 2201 Rack Chassis 2202 Modem Shelf Rack Mount PC Card Unit Weights shipping 2270 Standalone 2201 Power Supply Monitor Card 2201 AC Power Supply 2201 DC Power Supply 2201 Rack Chassis 2202 Modem Shelf 2200 I Interface PC Card
11. Rx This will link the Rx of the local modem to the Tx of the remote modem and the Tx of the local modem to the Rx of the remote modem The connectors are clearly marked as to their function either Transmit Tx or Receive Rx on the rear panel of the 2270 standalone units and on the rear of the 2201 Rack Chassis NOTE Keep all connectors free of water dust and dirt Cover them and the cable ends with plastic caps when they are not mated The 2270 can be used with most popular sizes of multimode and single mode optic cable includ ing 8 10 125 50 125 and 62 5 125 Do not mix multimode and single mode fiber optic cables NOTE When using 85 125 or 100 140 micron fiber optic cable an in line attenuator may need to be installed between the 2270 and the Receive Rx fiber optic cable for proper modem operation on short links 2 5 DC Power A DC powered version is available for use with a nominal 48 VDC source 36 to 72VDC at 0 5A Units are supplied with a 5 foot three wire cable terminated with a three pin Molex connector Part Number P N 19 09 1036 female pins P N 02 09 1119 The mating connector is Molex P N 19 09 2036 with male pins P N 02 09 2118 Power input pin designations are Pin Signal 1 odd shape Vin RED 2 Chassis EARTH Ground WHITE 3 Vin BLACK The DC DC converters isolate input and output so that either polarity DC input can be used Normally Pin 2 Chassis Ground is connected to on
12. W1 w2 CHASSIS GROUND W1 100 OHM W2 SHORT W1 DEFAULT W5 W6 W7 RCVR TERMINATIONS ALL OUT W8 W9 LEGACY CONFIG BOTH OUT W10MW11 RLSD OUTPUT SWING w11 W12 W13 W14 RLSD OUTPUT SWING W13 W15W16 DSR W15 TEST W16 GND W16 DEFAULT W17AN18 RTS BIAS W17 ON W18 OFF W18 DEFAULT W19 W20 RLSD W19 SIGNAL ENDED W20 DIFFERENTIAL W20 DEFAULT Table 3 K Delay Times for Programmable Buffered Interface SW1 Position Delay Time O pen C losed P53 12 3 4 C C C C O C C C C OCC O O C C C C OC O C O C C OOC O O O C C CC O O C C O C OCO O O C O C COO O COO C OO 0 O O O O 36 2270 Fiber Optic Modem This interface has strap option jumpers to configure the RLSD Output at J1 8 10 DB 25 to sup port the KG 194 Resync functionality Jumper straps W10 W11 adjacent to U11 and W12 W13 W14 adjacent to U8 implement this function refer to Table 3 L Jumper straps W10 W11 control the ON OFF level and W12 W13 W14 configure the RLSD Output to Bipolar 6 V and 6 V or single ended 6 and 0 or 6 and 0 The W1 W1 strap connects chassis ground to signal ground W2 position connects chassis ground through 100 ohms to signal ground W1 position or isolates chassis ground from signal ground jumper out The W5 W6 and W7 jumpers when installed ground the midpoints of the 100 ohm termination resistances of the FIFOCLK SCTE and TxD line receivers These jumpers may provide improved performance in cases where the RS 422 inputs are bipol
13. assistance 2 7 6 Slave Clock Operation The slave clock mode may be selected by closing switch position 5 on the front panel eight section switch bank This will use the 2270 s optical received clock as its transmit clock output The setting of switch position 6 has no effect Refer to Section 2 7 7 2 regarding switch position 4 The System Test feature will function with a modem configured for slave clock operation However the user must be aware of the following limitation If the System Test is enabled a modem configured for slave clock will provide the System Test timing to the user as receive and transmit clock This could cause a potential problem since the System Test timing may not be at the correct data rate for the user device A solution to this problem is selecting an oscillator module which allows selecting Internal Test clock equal to the data rate of the user devices NOTE The 2270 Modem will not pass data with an external optical loopback when con figured for slave clock operation 2 7 7 Consideration of Propagation Delays Whenever the modem is sending a transmit clock to the DTE it is important to understand the effect of the time required for that clock to propagate from the modem to the DTE Clock to Data phasing is particularly important in any synchronous data link The modem ex pects the data to be valid unchanging at the point in time when the clock transitions to clock the data 20 2270 Fiber Optic M
14. of 80 120 ohms at the operating data rate The balanced line receivers are terminated at 100 ohms The V 35 interface uses a standard 34 position M series MRAC 34S Winchester connector The terminal or computer interface must be configured as Data Terminal Equipment DTE for proper communications handshake refer to Table 3 J for pinouts NOTE Only local controls are supported Table 3 J CCITT V 35 Digital Interface and Pin Assignments signal name CCITT signal direction Frame Ground 101 n a Signal Ground 102 n a Reguest To Send 105 to modem Clear To Send 106 from modem Data Set Ready 107 from modem Data Carrier Detect 109 from modem Receive Data 104 from modem Serial Clock Receive 115 from modem YIAA SCT Serial Clock Transmit 114 from modem P S TXD Transmit Data 103 to modem UN SCTE External Transmit Clock 113 to modem CC RURT Remote System Test 140 to modem HH LULT Local Loopback Test 142 to modem n a not applicable The 2270 Modem includes a built in System Test feature Two normal test lines CCITT V 35 pins CC and HH are used for this interface loop Refer to Chapter 5 Troubleshooting for a more thorough description of this feature 33 Canoga Perkins 3 9 Programmable Buffered Interface Model P53 The Model P53 Interface Module employs an RS 422 electrical interface with a DB 25 interface connector RS 530 It also employs an 8 bit elastic buffer A combination of FIFO First In Fir
15. of 9 Mbps any asymmetrical clock input is corrected to approximately 50 duty cycle Below this rate the duty cycle offset of the input is reproduced at the output Below 6 5 Mbps duty cycles from 25 to 75 can be tolerated The 2270 may cause the receive clock duty cycle to be inverted relative to the input clock but the clock to data phasing will still be correct This is an artifact of the design method used to ensure the high BCI The 2270 s design stresses integrity of clock reproduction This accounts for the exceedingly high BCI of less than one error in 10 clock cycles at 20 Mbps 4 8 Control Signals The 2270 interfaces support limited control signal functions If Data Set Ready DSR is present as an interface output it is asserted when the modem is powered and is not in any test or loopback mode This standard DSR response functions as a Test Mode indication Some interfaces support both DSR and Test Mode TM A different DSR signal is made available to them Its response complies with EIA and other standards by allowing only one condition for OFF that is only if the modem has received and responded to the command to turn on a remote loopback 51 Canoga Perkins If Data Carrier Detect DCD is present as an interface output it is asserted if the remote modem is sending valid optical carrier to the local modem If the interface is looped back for testing DCD is asserted regardless of the state of optical carrier How
16. output providing the clock to the connected device When set for SCTE the port becomes an input and will accept a clock from the connected device SCT should be selected if the modem is set for Internal or Slave Clock mode SCTE should be selected if the modem is set for External Clock mode NOTE The SCT output cannot be returned on the SCTE leads to eliminate propagation delay problems with this interface 3 10 3 Model T22 The signaling used on this interface is RS 422A Five TwinAx connectors BJ 77 type are used for the physical connections see Figure 3 13 3 10 4 Model T88 The signaling used on this interface is Mil Std 188 114C Five TwinAx connectors BJ 77 type are used for the physical connections see Figure 3 13 3 10 5 Model D22 The signaling used on this interface is RS 422A A standard 37 position D type female connector DC 37 is used as the physical connections refer to Table 3 P 3 10 6 Model D88 The signaling used on this interface is Mil Std 188 114C A standard 37 position D type female connector DC 37 is used as the physical connections refer to Table 3 P 46 Figure 3 12 BNC and Four TwinAx Connec tors BJ 77 Type 2270 Fiber Optic Modem Receiver Clock Received Data Figure 3 13 Five TwinAx Connectors BJ 77 Type Transmitted Data External Transmitter Clock Transmitter Clock Table 3 P Models D22 and D88 Connector Pin Assignments DC 37 PIN NUMBERS SCR A SCR
17. used to make up for clock drift doppler shift caused by the satellite s elliptical orbit around the Earth Figure 3 5 illustrates the location of the J3 programming header the DIP switches used for setting the delay line parameter the interface connectors the KG Resync control output setting jumpers and all factory default jumper settings The FIFO allows the user to recondition either the received or transmitted data not both The Delay Line in conjunction with a four position DIP switch provides an option for fine tuning the relationship between clock and data timing Table 3 K defines the delay times versus switch settings for Model P53 34 2270 Fiber Optic Modem PROGRAMMABLE BUFFERED INTERFACE MODEL P53 DCE RS 530 KG SWING JUMPERS o lt 9 FIFO MODEM O DATA OUT DATA IN ALARM W20 o RLSD o x SHIFT OUT SHIFT IN FROM RD Uu x Rx DATA da a o Rx CLOCK q REYES 17 5 SCR 9 E c Li 15 3 Figure 3 4 BET d x I Available lt po DELAY Strapping Options g LINE for Programmable 2 ni Buffered Interface clock 23 ra INTERNAL cad MODEM SCTE 44 if Tx CLOCK 2 x FIBER R gt Tx DATA P CIRCUITS XD 14 0 FG 2 FROM MODEM CTS 43 6 DSR lt 22 TO MODEM 6 13 RTS 7 17 19 8 18 9 19 LL RL 14 15 35 Canoga Perkins Figure 3 5 Board Layout for Programmable Buffered Interface SHORT wi 1002 w4 wi3 W12 COJO9 w7 6V 6V 6V
18. 1 T1 interface requires this selection Factory Setting ON 15 Canoga Perkins Chapter 2 Installation 2 1 Unpacking the Unit Each 2200 Series Modem is shipped factory tested and packed in a protective carton Unpack the unit and retain the shipping carton and protective packing for reuse in the event it is necessary to return the modem to the factory To assure proper operation of the modem please inspect it and its shipping carton carefully for damage If damage is sustained to the unit immediately file a liability claim with the freight carrier Canoga Perkins is not liable for damage in shipment 2 2 Standalone Modem Installation Installing the standalone version of the 2270 is straightforward It should be located conveniently to the operator The electrical and optical cables should be isolated from foot traffic to prevent pos sible damage For AC powered units the attached power supply for the standalone is a wall type transformer It should be plugged into a standard AC wall outlet that incorporates a ground line APOWER ON switch is not provided as the modem is powered when the unit is plugged in 2 3 2202 Modem Shelf Installation Two 2270 standalone modems may be installed in an equipment rack when using the 2202 Mo dem Shelf The modems may be placed side by side on the shelf after the shelf is mounted in the equipment rack see Figure 2 1 For amore secure assembly two screws are provided to secure the mo
19. 2 or two female BNC B3 Figure 3 3 shows how the input and output pairs are wired to these connectors This interface performs jitter attenuation of the transmit line input signal It is also designed to propagate an all 1 s AMI stream if the end to end line is interrupted NOTE When using this interface the modem must be configured for external clock Table 3 H Transparent Bipolar Line Interfaces Interface Model Connector Type Speed DA 15 1 544 Mhz T1 or 2 048 MHz E1 Terminal Block 1 544 Mhz T1 or 2 048 Mhz E1 BNC 1 544 Mhz T1 or 2 048 Mhz E1 30 Figure 3 3 Transparent Bipolar Interface Connectors Table 3 l Line Build Out Settings 2270 Fiber Optic Modem Switch Positions for 4Bx 4 3 OFF ON OFF ON OFF ON OFF OFF OFF OFF 5 MODE OF OPERATION E1 CCITT 0 133 FT 133 266 FT 266 399 FT 399 533 FT 533 655 FT PART 68 OPT A T1C12 These interfaces are fully transparent to line codes such as B8ZS or HDB3 Three DIP switches 3 4 and 5 are provided for selecting various line buildout settings Standard factory settings are T1 at 0 133 feet for all three models Two DIP switches 1 and 2 are provided to select CCITT speed 2 048 Mhz X 3 or T1 speed 1 544 Mhz X 3 TX Line In Pins 1 amp 9 Rx Tul 0000 Line Out Pins 3811 Bl TX Line T In Dm Rx Line Out B2 TX Line In BNC Connector
20. 29 and RR pin 33 are connected to signal ground Only a local handshake is supported for the control leads The maximum data rate specified is 10 Mbps 23 Canoga Perkins 3 3 1 Jumper Strap Settings Table 3 A Jumper Strap Settings Jumper Strap Function W1 W2 WI Chassis GND tied to Sig GND through 100 ohms W2 W2Chassis GND tied directly to SIGGND RTS biased to ON RTS biased to OFF Table 3 B RS 232C 423 Signals and Pin Assignments RS 232C RS 423 CCITT pin mnem signal name mnem signal direction Frame Ground Transmit Data Receive Data Request To Send Clear To Send Data Set Ready Signal Ground Data Carrier Detect Local Loopback Test Serial Clock Transmit Serial Clock Receive Remote System Test Tx External Clock 1 Only Local Handshake is supported 2 The 2270 amp 2290 Modems include a built in Loopback Test feature Two normally undefined lines RS 232C pins 11 and 18 are used for interface control of these system test functions Refer to Chapter 5 Troubleshooting for a more thorough description of this feature ene from modem to modem from modem from modem signal ground from modem to modem from modem from modem to modem to modem Table 3 C Available Models of RS 449 422 Interfaces Dem omen E RS 449 422 RS low RS 449 422 RS high RS 449 422 balanced CTS RS low 24 2270 Fiber Optic Modem Table 3 D RS 499 RS 422 Signals and Pin Assignments Frame Grou
21. CANOGA PERKINS Canoga Perkins 2270 Fiber Optic Modem User Manual Canoga Perkins Notice Canoga Perkins has prepared this manual for use by customers and Canoga Perkins personnel as a guide for the proper installation operation and or maintenance of Canoga Perkins equipment The drawings specifications and information contained in this document are the property of Can oga Perkins and any unauthorized use or disclosure of such drawings specifications and informa tion is prohibited Canoga Perkins reserves the right to change or update the contents of this manual and to change the specifications of its products at any time without prior notification Every effort has been made to keep the information in this document current and accurate as of the date of publication or revision However no guarantee is given or implied that the document is error free or that it is accurate with regard to any specification Canoga Perkins Corporation 20600 Prairie Street Chatsworth CA 91311 6008 818 718 6300 FAX 818 718 6312 Web Site www canoga com e mail filber canoga com Copyright 1988 1990 1991 1992 1996 1998 2000 2001 2002 2003 2004 Canoga Perkins All Rights Reserved 2270 Fiber Optic Modem 6910321 Rev P 08 2005 2270 Fiber Optic Modem Caution This product may contain a laser diode emitter operating at a wavelength of 1300 nm 1600 nm Use of optical instruments for example collimating optics with this produc
22. L PROGRAMMABLE BUFFERED INTERFACE MODEL P53 DCE RS 530 KG SWING JUMPERS PO I E Wig MODEM Bo DATAOUT DATA IN ALARM w20 Figure 3 9 RLSD o SHIFT OUT SHIFT IN External Programmable 3 Buffered Interface RxD ELE 1 PERATA de ERM 16 Bi FIBER Model P53 Rx CLOCK circurs 17 SCR g x IN our INVERTER 15 SCT 12 x IN DELAY LINE 20 FIFO clock 23 INTERNAL CLOCK FROM 24 MODEM ASE Ag la Tx CLOCK TO ef FIBER 2 18 Tx DATA gt crcurs 41 Canoga Perkins 3 9 5 DTE Adapter This adapter is supplied with the P53 interface and should be used when connecting to a DCE device This allows the use of a straight through RS 530 cable Figure 3 10 illustrates the DCE to DTE pin assignments The gender of this adapter on the user side is male PROGRAMMABLE BUFFERED INTERFACE MODEL P53 DCE RS 530 DTE DTE ADAPTER slo o MODEM ef TA AARM pou zj 24 17 I z 1 NC SCT 12 NC Figure 3 10 45 Programmable Buffered Interface ES gt Model P53 DTE a ors Pe 2 RxD CTS 7 SG i FE FG 1 NC s FROM MODEM CTS 43 6 DSR lt I 22 sa TO MODEM RTS 19 LL NC NOT CONNECTED 42 Figure 3 11 Programmable Buffered Interface Model P53 Legacy Adapter 11 2270 Fiber Optic Modem 3 9 6 Legacy Adapter This adapter is provided with the P53 interface and should be used if preexisting cabling was installed for use with Model P2 interface cards see Figure 3 11 This adapter
23. Procedures 6 1 2270 2201 Diagnostic Procedures The following diagnostic procedures should be followed to test the 2270 system troubleshoot a defective link or detect a defective fiber optic cable connector modem or power supply NOTE Refer to the 2201 Rack Chassis User Manual for diagnostic procedures for the 2201 Rack Chassis and power supplies Required Equipment 1 Multimeter for AC voltage resistance and continuity tests 2 Fiber Optic Power Meter should be calibrated at the correct optical wave length 1300 nm withthe appropriate optical connectors 3 A short one meter or less 62 5 UM fiber optic jumper cable terminated with the appropriate connectors 4 ABit Error Rate Tester BERT with the appropriate electrical interface and cable Step Symptom Possible Cause s Action 1 No power indicator No AC power Check AC power source on front panel s 2 No power indicator Defective modem Replace Modem on front panel s NOTE Once any power system problems have been corrected continue the system checkout after the System Test Diagnostic Procedure 6 2 System Test Diagnostic Procedure Step Symptom Possible Cause s Action 1 No data transmission Defective fiber optic Set the System Loopback between modems modem s cable s switch on one modem Verify or connectors the proper operation of the test refer to Chapter 5 If the test is successful proceed to Step 5 If the test fails continue to the next step 2 Verif
24. R NORM I SCT POL ON ON l ATA i EIADSR ug OFF OFF OFF MI ON ALTB ap OPTICAL TX LOC ON LOOP SW TX POWER a sa A REM RX Sia E re 8 MODE 4 8 REFER TO FIGURE FACTORY SETINGS SHOWN 1 1FOR FACTORY RATE 1 3 OPTICAL SETTINGS OF RATE RX SWITCHES i 13 Canoga Perkins 14 Table 1 C 2270 Switch Functions LOOP TEST switch on Front Panel described in Section 5 Troubleshooting LOC position will activate a local interface loopback REM position will activate a System Test and control the state of the far end loopback OFF position is for normal transmission TRANSMIT OPTIC POWER switch on Rear Panel described in Section 1 9 HI position is used for link losses from approximately 10 dB and greater LO position is used for link losses below 10 dB RECEIVER SENSITIVITY switch on Rear Panel described in Section 1 9 See NOTE 1 The position of this switch is dependent on both the loss of the Rx link and the position of the Tx optical power switch on the modem at the other end CLOCK RATE switches on Front Panel described in Section 2 Switches 1 3 control both the internal clock rate and the System Test rate The rate is also dependent on the frequency of the installed oscillator CLOCK MODE switches on Front Panel described in Section 2 Switches 4 6 control the transmitter clock mode external slave internal Switch 7 controls the transmitter sensitivity to RTS used for flow control
25. S CTS Output Local CTS function see also CTS GATE Jumper above Must be set to CTS on 2270 RI not supported Factory Setting CTS If modem has a jumper to connect Chassis Ground and Signal Ground it must be left in the OPEN or FLOAT position for interface jumpers to work correctly 29 Canoga Perkins 3 6 T1 E1 Interfaces There are only two versions of T1 E1 interfaces available The Transparent Bipolar models B1 B2 and B3 are compatible with any bipolar line coded T1 E1 data and the DS1 T1 Model T1 is for T1 only 3 6 1 Transparent Bipolar Models B1 B2 B3 This interface is compatible with any bipolar line coded T1 E1 data 1 544 Mbps 2 048 Mbps All types of codes including AMI B8ZS B7S or HDB3 will be accurately transmitted received refer to Table 3 H Line Build Out settings for T1 are given in Table 3 1 NOTE Do not use the first switch setting for T1 It is reserved for E1 only NOTE This interface passes all bipolar violations without correction If AMI T1 coding is used and correction is desired the DS1 T1 interface must be used NOTE This interface is not compatible with any other type of interface If compatibility with either DS1 T1 interfaces or clock and data interfaces is necessary the DS1 T1 must be used There are three different types of interface connectors indicated by the number at the end of the interface code The connectors are female DA 15 B1 a four position terminal block B
26. Switch 8 enables selecting an alternate loopback method refer to Section 5 for Loopback options NOTE 1 Power should be cycled after changing switch The unit must be powered down whenever a setting is changed 2270 Fiber Optic Modem Table 1 D 2270 Jumper Functions SIGNAL GROUND controls connecting circuit ground to the chassis CHASSIS connects them together FLOAT isolates the two grounds Factory Setting FLOAT SCT POLARITY controls the transmit clock output NORM is always used for low data rates for proper clock phasing INV may be needed for internal clock or slave clock modes operating high data rates if the DTE loop has long delays Factory Setting NORM TEST controls the built in test pattern checker ON allows System Test loopback to be activated and Remote Loopback control OFF defeats pattern loopback for System Test and disables any Remote Loopbacks Factory Setting ON ALT A and ALT B allow alternate loopback methods to be selected If the front panel alternate loopback switch is also considered there are eight possible loopback responses for each end of the link ALT A affects Local Loopback depending on the ALT loopback switch Factory Setting OFF ALT B affects Remote Loopback depending on the ALT loopback switch Factory Setting OFF EIADSR allows a proper DSR signal to connect to the interface ON connects the signal through interface OFF disconnects the signal from the interface Only the DS
27. THE CAUSE OF THE ACTION HAS ACCRUED CANOGA PERKINS MAXIMUM LIABILITY SHALL NOT EXCEED AND CUSTOMER S REMEDY IS LIMITED TO EITHER i REPAIR OR REPLACEMENT OF THE DEFECTIVE PART OF PRODUCT OR AT CANOGA PERKINS OPTION ii RETURN OF THE PRODUCT AND REFUND OF THE PURCHASE PRICE AND SUCH REMEDY SHALL BE CUSTOMER S ENTIRE AND EXCLUSIVE REMEDY AUTHORIZED RESELLERS ARE NOT AUTHORIZED TO EXTEND ANY DIFFERENT WARRANTY ON CANOGA PERKINS BEHALF Return Policy RETURN MATERIAL AUTHORIZATION RMA Customer must obtain an RMA Return Material Authorization number from the Canoga Perkins Customer Service Department before returning a product for service or repair Canoga Perkins technical support department can be reached through any of the following means Telephone 818 718 6300 Fax 818 718 6312 E Mail fiber canoga com If the warranty for a power supply fan optics consumable or software has expired customer must provide the Canoga Perkins Customer Service Representative with a Purchase Order to authorize the repair Send the defective product postage and insurance prepaid to the address provided to you by Canoga Perkins technical support representative Failure to properly protect the product during shipping may void this warranty The return authorization number must be written on the outside of the carton to ensure its acceptance The customer must pay for the non compliant product s return transportation costs to Canoga Perkins for
28. aces for pin numbers NEAR USER END DEVICE ELECTRICAL OPTICAL NEAR USER END DEVICE ELECTRICAL OPTICAL FAR END OPTICAL ELECTRICAL 55 Canoga Perkins 5 2 2 Remote Loopback Test To activate the Remote Loopback Test set the Loop switch to REM and after the Rx Data Indicator begins to flash set the switch back to OFF For the System Test Only option retain the test switch in the REM position refer to Section 5 2 3 The Local Loop On indicator will remain on indicating that the Remote Loopback has latched to the active state in the far end modem The Loop On Indicator at the far end modem will flash to indicate that a remote loopback is active at that end To release the Remote Loopback Test set the Loop switch to REM and after the Loop On indicator begins to flash set the switch back to OFF A Remote Loopback can also be activated through the electrical interface if it supports the Remote Loopback control lead refer to Section 3 Data Interfaces for pin numbers This lead must be driven to the ACTIVE positive voltage state and released after an appropriate delay period Table 5 A defines the types of Remote loopbacks that are possible with each configuration of the ALT A and B jumpers Figures 5 1 5 4 5 5 and 5 6 illustrate the System Test Only Optical Only Bi Directional and Optical at Local End forms of remote tests NOTE If any modem locks up where the Loop On indicator stays ON
29. al Clock Operation The modem can be set to accept an external clock by closing switch position 4 of the switch block on the front panel Leaving switch positions 5 and 6 open will ensure that the transmit clock output is clamped 2 7 2 Internal Clock Operation The modem can be set to provide an oscillator derived clock to the DTE by closing switch position 6 of the eight section switch bank on the front panel Switch position 5 must be left open Refer to Section 2 7 4 for information on Data Rates Refer to Section 2 7 7 regarding switch position 4 NOTE For SCT Polarity refer to Figure 1 3 and Table 1 E refer to Section 2 7 7 for Con sideration of Propagation Delays 18 Figure 2 2 2201 Rack Chassis Front View with Modems Installed 2270 Fiber Optic Modem Table 2 A Operating Mode Selections Internal DIP Switches SCT Polarity C Closed O Open Jumper 5 6 Operating Mode External Clock Mode SCT suppressed Slave Clock Mode SCT Receive Clock X DIP switch position 6 is don t care Slave Clock Mode SCT Receive Clock Inverted Slave Clock Mode SCT returned on Ext Clk leads Internal Clock Mode Mode SCT Internal Clock Internal Clock Mode Mode SCT Internal Clock Inverted DIP switch position 5 must be Open Internal Clock Mode Mode SCT returned on Ext Clk leads 19 Canoga Perkins 2 7 3 Asynchronous Operation The 2270 can operate in the data only asynchronous mode by setting the Clock Mode to
30. ar rather than the more common unipolar types The W8 W9 and W15 W16 jumpers are used for converting to the Legacy configuration see Figure 3 11 Table 3 L Strap Configurations for Programmable Buffered Interface STRAP CONFIGURATIONS CD OUTPUT AT J1 6 VOLTAGE LEVEL 1 V ON OFF W11 and W14 W11 and W12 W11 and W13 W10 and W14 W10 and W12 W10 and W13 37 Canoga Perkins 3 9 1 Generic Interface Wire Wrap Header P N 6100030 006 This interface see Figure 3 6 conforms to the EIA RS 530 pinout and signal flow for a DCE device PROGRAMMABLE BUFFERED INTERFACE MODEL P53 DCE RS 530 OW FIFO MODEM O DATA OUT DATAIN ALARM W20 SCTE 44 RLSD o E SHIFT OUT SHIFT IN 3 i 5 FROM Rx DATA RxD 4g x x FIBER Rx CLOCK pes CIRCUITS 17 2 SCR O 9 x or Li 15 SCT o E I Figure 3 6 Ka zm DELAY Programmable z s LINE Buffered Interface FIFO LI Model P53 DCE CLOCK 23 x INTERNAL RS 530 CLOCK FROM zs j MODEM Tx CLOCK TO p FIBER Tx DATA CIRCUITS RxD 44 gt mn 0 E FG 2 FROM MODEM CTS 43 6 DSR lt 22 a TO MODEM 6 13 RTS 7 17 19 8 18 9 19 LL RL 14 15 38 2270 Fiber Optic Modem 3 9 2 External Station Wire Wrap Header P N 6100030 004 The External Station is used when an external station clock is providing timing see Figure 3 7 When connecting KG or KIV encryptors together on the Black side using an external timing device you should install the ext
31. chase date please complete the warranty on line form on our product registration page URL www canoga com warranty Optional Service Programs Canoga Perkins offers several optional Service Programs Please call Canoga Perkins Sales Department 818 718 6300 or see our web site www canoga com for details CUSTOMER SERVICE DEPARTMENT REPAIR WARRANTY Repairs performed by the Canoga Perkins Customer Service Department will be free from defects in material and workmanship for a period of ninety 90 DAYS from the date the repaired product is shipped or until the expiration of the original factory warranty whichever is longer 63 Canoga Perkins Limitations Other than those expressly stated herein THERE ARE NO OTHER WARRANTIES OF ANY KIND EXPRESSED OR IMPLIED AND SPECIFICALLY EXCLUDED BUT NOT BY WAY OF LIMITATION ARE THE IMPLIED WARRANTIES FOR FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY IT IS UNDERSTOOD AND AGREED CANOGA PERKINS LIABILITY WHETHER IN CONTRACT IN TORT UNDER ANY WARRANTY IN NEGLIGENCE OR OTHERWISE SHALL NOT EXCEED THE AMOUNT OF THE PURCHASE PRICE PAID BY THE CUSTOMER AND UNDER NO CIRCUMSTANCES SHALL CANOGA PERKINS BE LIABLE FOR SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES THE PRICE STATED FOR THE EQUIPMENT IS A CONSIDERATION IN LIMITING CANOGA PERKINS LIABILITY NO ACTION REGARDLESS OF FORM ARISING OUT OF THE TRANSACTIONS OF THIS AGREEMENT MAY BE BROUGHT BY CUSTOMER MORE THAN ONE YEAR AFTER
32. converts the stan dard RS 530 pin assignment on the P53 back to the original P2 pin assignments PROGRAMMABLE BUFFERED INTERFACE MODEL P53 DCE RS 530 LEGACY o RLSD RS 423 8 MODEM ALARM N o 0 N a x o o e A a Cc o 10 a o N SCT A N s m O gt O lt gt U gt TU m a N VNN EN 20 CLOCK 23 24 SCTE 4 2 RxD 14 00 SG MEE FG 5 FROM MODEM O ws owe C es A 6 DSR 22 4 TO MODEM RTS 19 LL I a oa N N a N O N 5 W15 W16 MUST BE SET TO W15 W8 IN CONNECTS PINS 2 5 8 11 16 22 AND 25 TO SIGNAL GROUND RL W9 IN CONNECTS PINS 2 5 8 11 16 22 AND 25 TO CHASSIS GROUND 43 Canoga Perkins 3 10 High Speed RS 422 Mil Std 188 114C Interfaces There are three High Speed RS 422 interface models TW T22 and D22 and three High Speed Mil Std 188 114C interface models TW8 T88 and D88 available All can operate up to 20 Mbps All support only clock and data signals as shown in Table 3 M Both the RS 422A and Mil Std 188 114C are balanced differential electrical signals The RS 422A operates between 1 and 4 volts whereas the Mil Std 188 114C swings between 3 volts The termination impedances vary slightly as illustrated in Table 3 N The two interface types will communicate with each other but center tap ground jumpers E2 and E3 must be re moved from a Mil Std 188 114C interfac
33. dems to the shelf prior to installing the shelf in the rack First on the modem that will be mounted on the left side of the shelf remove and discard the center cover attachment screw on the left side Position the modem so that the empty hole lines up with the one on the left side of the shelf Next using one of the longer screws provided mount the modem from the outside by threading the screw through the 2202 shelf and into the cover screw hole in the modem 16 Figure 2 1 Model 2202 Standalone Modem Shelf 2270 Fiber Optic Modem Repeat this procedure for the second modem using the center cover retaining screw on the right side of the modem After the modems are secure you can mount the shelf into the equipment rack NOTE Depending on accessibility it may be necessary to connect the fiber cables and interface cables before mounting the 2202 shelf in the equipment rack NOTE The modem must always be removed from the 2202 shelf and its top cover re moved to access any switches inside the case 2 4 Fiber Cable and Connectors The proposed fiber optic cable must provide adequate bandwidth and power loss characteristics for the intended modem link Furthermore the terminated cable must match the connectors on the modems typically ST The connectors on the fiber optic cable when supplied by Canoga Perkins are marked Tx and Rx and should be connected to matching connectors on the modem That is Tx to Tx and Rx to
34. e refer to Table 3 O The basic differences between the models is the type of physical connectors used for the inter face Table 3 N lists the six interface models with the corresponding source and termination impedances and physical connectors Table 3 O shows the jumper options available and the factory default settings for the jumpers Table 3 M TwinAx and BNC Supported Signals Transmit Data To Modem Receive Data From Modem Serial Clock Receive From Modem Serial Clock Transmit From Modem External Clock Transmit To Modem Table 3 N Model Characteristics Electrical Physical Driver Driver Termination Interface Interface Impedance Impedance Impedance Type Type Figure Table RS 422A 4 TwinAx lt 100 Ohms 100 Ohms 10 Mil Std 4 TwinAx lt 100 Ohms 78 Ohms 10 118 114C RS 422A 5 TwinAx lt 100 Ohms 100 Ohms 10 Mil Std 5 TwinAx lt 100 Ohms 78 Ohms 10 188 114C RS 422A lt 100 Ohms 100 Ohms 10 Mil Std lt 100 Ohms 124 Ohms 10 188 114C 2270 Fiber Optic Modem Table 3 O Jumper Strap Options Defines whether alarm relay contact is normally open W2 or normally closed W1 W5 W6 W6 Normal SCT W5 Inverted SCT W7 W8 W7 Shield connected toW7 chassis ground W8 Shield connected to signal ground W9 W10 W9 Chassis ground con nected to signal ground W10 Not connected E2 TxD RCV termination resistor N A IN N A IN N A center tap to shield ground E3 SCTE RCV termination resistor N A IN N A IN N A
35. e of the two voltage pins Protection diodes on the converter board prevent damage from input polarity reversal Fuses are soldered in place to protect the modem from excessive voltage inputs 17 Canoga Perkins The outside case of the DC powered modems will run warmer to the touch than the corresponding AC powered units This is because the cover is used as a heat sink for the DC DC converter 2 6 Rack Chassis Installation The 2201 Rack Chassis is designed to accommodate up to ten 2270 modems see Figure 2 2 The 2201 will fit into a standard 19 inch equipment rack Tabs are provided on each side of the unit and are predrilled for standard spacing For further details refer to the 2201 Rack Chassis User Manual 2 7 Mode and Rate Selection NOTE The switch notation standard for mode and rate is the following Closed ON Open OFF The 2270 has three basic clock operating modes External Internal and Slave These allow the modem in combination with the Internal Polarity Option jumper to be configure for a wide range of applications Asynchronous operation is accomplished by setting the modem to Internal Mode and oversampling the data refer to Section 2 7 2 Internal Clock Operation The operating mode is selected by setting positions 4 5 and 6 of the eight section switch bank on the front panel Table 2 A lists the modes and the switch positions The switch positions are numbered from left to right 1 to 8 2 7 1 Extern
36. em E ERE sauces RESINA TII In ae 46 3 10 5 Model xD22 tinas a DAT RAE a a EE FP TERES 46 3 10 6 Model D88 nana 46 3 11 Interface Reconfiguration i 005 sccessecsserrssessesssoodssvsecvdecenssoedassecucssonsestoresecus 48 3 12 Standalone Reconfiguration oooconoonnnooonnnonnononnncncnnncnnocnconococononoconococonaconos 48 Chapter 4 Modem Operation eere ecce eese e etes eee teens enne etna aane 49 4 1 Modem Operations e eter t er RS ERE NER EN RE roke k a EE SERES aje 49 42 Fiber OPNOS ii 49 4 3 Transmit O sosucsoogeudacecisvenbedbavnesbemtonesaverts 50 AA RECEIVE Section acije do die ja aka 50 4 5 Full Rate Ar eii 50 4 6 Bit Count Inf grity A ka 51 4 7 Duty Cycle Tolerance a 51 AS Control SinalS di 51 4 84 Blow Cono li idas 52 Chapter 5 Troubleshooting iisssecesscccssassssesaccossessesossscesdadssconsscossadssceeuscetee 53 5 1 Diagnostic Procedures AAA A 53 Dek LUCI LE S3 5 2 1 Local Loopback Testi ra reget eoe rar ee teca 55 5 2 2 Remote Loopback Test 56 5 2 3 System Loopback Testaa enr aia 57 Chapter 6 Diagnostic Procedures oeossoesssooesoossssessssecesoosesoessssosesosseos 58 6 1 2270 2201 Diagnostic Procedures oooooocccoooncconnncononocononoconanocononoconanononanonoss 58 6 2 System Test Diagnostic Procedure cmoooccooonconnnnconnnccononocononocononoconocococnconos 58 Canoga Perkins Chapter 7 Specifications e sooesooesssoesssosesoos
37. ernal Clock Internal Clock Slave Clock Flow Control Alternate Loopback Functions Switch positions 4 5 and 6 select the clocking mode for the modem as described in Section 2 7 and shown in Table 2 A Switch position 7 selects whether the RTS input controls flow control through the modem Open no flow control Closed flow control enabled Refer to Section 4 8 1 Switch position 8 selects the normal or alternate loopback mode as shown in Table 5 A of the Troubleshooting section Indicator lights are provided for Power On Optical Receive and Transmit data activity Interface Receive and Transmit data activity and for Loopback On All of these indicators are located on the front panel for both standalone and rack mount versions The loopback switch on the front panel is used to activate the built in system test or to select either a Local or Remote loopback function Use of this switch is outlined in Chapter 5 Trouble shooting The electrical interface connection and fiber optic connections are made at the rear of the modem The HI LO optical power switch is also located there There is also a HI LO switch for the optical receiver used to select its sensitivity Operating this switch in the LO position may be necessary under certain low loss conditions refer to Section 1 9 Canoga Perkins 1 3 2201 Rack Chassis The 2201 Rack Chassis is designed to accommodate up to ten 2200 series modems It offers a variety of feat
38. ernal station clock strapped header in the J3 position In this application the modems are acting as the network although the timing input is from an outside source The modem in which the timing source is connected should be set for external and the other modem set for slave This header is provided with the interface Typical External Station Clock Application MM or SM T D E emm 518 E foe Fiber Optics um EXTERNAL STATION PROGRAMMABLE BUFFERED INTERFACE MODEL P53 DCE RS 530 oc Figure 3 7 Programmable 9 s FIFO MODEM Buffered Interface ae DAROVE DATA eo id iss re RLSD o SHIFT OUT SHIFT nal Station 12 4 a E Rx DATA 19 nd Rx CLOCK IN A o FROM E EBER lt circus a N SCR g 15 INVERTER SCT OUT IN DELAY 20 LINE FIFO CLOCK 23 INTERNAL CLOCK FROM 24 MODEM SCTE 44 To gt FIBER CIRCUITS a x o EN P VVV NANA 17 Tx CLOCK 18 8 O Tx DATA 7 amp 14 sS qo wig t 2ANO00 co 2 19 39 Canoga Perkins 3 9 3 Internal Wire Wrap Header P N 6100030 005 The internal function is used when network equipment is set for Eternal Timing see Figure 3 8 When connecting KG or KIV encryptors together on the Black side you should install the internal strapped header in the J3 position In this application the modems are acting as the network timing source In most cases both modems should be set
39. ess 1 A 1 B 1 C 1 D 2 A 2 B 3 A 3 B 3 C 3 D 3 F 3 G 3 H 3 I 3 J 3 K 3 L 3 M 3 N 3 P 5 A 2270 Fiber Optic Modem List of Tables Table Page Available Modem Controls ssccsccesssssctsvcsssnsssevevnsseusecesncvesnssosveeueysusevsoseseusensessdessausssosesecuesnsvesueeenueos 8 Guaranteed Loss Budgets pee 10 2270 Switch HUM COONS ooo ree eae ere O 14 p ilBiud eiLM e nakaj 15 Operating Mode Selections tereti saje obdajo eto PUN Ere SUP sess oosesonso0seconaedanseseoseenssosassoedsons 19 Data Rate Switch Position vs Oscillator Part Number ceres eese eere eee eene rne eter eonun 21 Juniper Strap SetUngs se seem none ERN NER ao e ex aaa dele ih vedeti RS 232C 423 Signals and Pin Assignments aaa sees eee e eren etes en sensa sinas ea s tons etas Available Models of RS 449 422 Interfaces eee ee eee esee eese nennen tena tn sensns onesna RS 449 RS 422 Signals and Pin Assignments Delay Times for Programmalbe Buffered ECL Interfaces RS 530 Signals and Pin Assignments eere RS 530 Jumper OPUONS err eee NY YXkE sescovecossedssusdssosengoedssnsensesasss OVESEN EE EN TEESE Transparent Bipolar Line Interfaces eee eee eee eese enses seen nennen enne tn stus en natns enn s one onnn onesna Line Build Out Settings
40. evaluation of said product s for repair or replacement Canoga Perkins will pay for the shipping of the repaired or replaced in warranty product s back to the customer any and all customs charges tariffs or and taxes are the customer s responsibility Canoga Perkins reserves the right to charge for all testing and shipping incurred if after testing a return is classified as No Problem Found 64
41. ever when Flow Control Mode is active the loopback forces DCD to follow the Request To Send RTS signal Clear To Send CTS is handled entirely by the interface card Typically CTS will follow the state of RTS with some delay between the time RTS turns on and CTS turns on Some interfaces may interlock CTS with the presence of receive optical carrier through the DCD signal 4 8 1 Flow Control The only form of end to end flow control available will allow RTS at the near end to control DCD on the far end This feature is enabled by the selection of Flow Control Mode Closing switch position 7 of the eight section switch bank on the front panel selects Flow Control Mode Once enabled this flow control will also stop any data transmission in the direction of the signaling if the RTS lead is in the off state Even in loopback the data will not flow unless RTS is asserted 52 2270 Fiber Optic Modem Chapter 5 Troubleshooting 5 1 Diagnostic Procedures The following procedures are intended for use in the event of a system failure not during the initial installation of a 2270 optical link For initial installation checkout refer to Chapters 1 and 2 5 2 System Test All 2270 Modems have built in local loopback and system test features These tests can be used to verify the basic operation of a 2270 system See Figure 5 1 for an illustration of system test loopback NOTE Interface control of the loopback tests is only supported on t
42. for internal master clock The rate switches should be set to the appropriate speed for the circuit This header is provided with the interface Typical Internal Clock Application PRIN KGIKIV Fiber Optics INTERNAL PROGRAMMABLE BUFFERED INTERFACE MODEL P53 DCE RS 530 w19 Figure 3 8 o DATA O UT DATA IN Internal Programmable RESP ES Z SHIFT OUT SHIFT IN Buffered Interface 3 3H Model P53 DCE RAD Rx DATA lt FROM RS 530 FIBER F Rx CLOCK E ciRCUITS Z zal scr 7 lt 5 ES ET DELAY OUT LINE 15 INTERNAL CLOCK FROM MODEM Tx CLOCK TO mo p BER 18 5 Tx DATA CIRCUITS 20 10 FIFO CLOCK 23 24 SCTE 44 40 2270 Fiber Optic Modem 3 9 4 External Wire Wrap Header P N 6100030 001 The External function is used when network equipment is set for Network or Internal Timing see Figure 3 9 When connecting KG or KIV encryptors on the Red side to a DTE device you should install the external strapped header in the J3 position In this application the modems are acting as an extension of the Red side cable in a true tail circuit The modem at the Red end is set for external clock and the modem at the DTE end is set for slave clock This header is provided with the interface Typical External Clock Tail Circuit Application MM or SM Fiber Optics KG KIV EXTERNA
43. he following modular interfaces RS 423 RS 232C RS 422 P53 and V 35 The test modes can be activated by setting the Loop switch on the front panel or by turning on the Local Loopback or Remote Loopback control leads in the electrical interface supported interfaces only NOTE Test activation will disrupt normal data flow through the modems TEST DATA DATA GENERATOR CHECKER Figure 5 1 System Test Example From User End of Fiber Link CHECKER All of the test options are summarized in Table 5 A and described in detail in the following sec tions The ALT A and B option jumpers allow the user to select several different Local and Remote testing options Front panel switch 8 Alternate Loopback Functions allows selection of various combinations of Local and Remote Test options 53 Canoga Perkins Table 5 A Loopback Options Local Modem Remote Modem AItB AA Normal Mode 1 Alternate Mode Normal Mode 1 Alternate Mode 2 Bi Directional 3 Interface Only 4 Optical Only 5 Bi Directional 6 fa Interface Only 4 Bi Directional 3 Optical Only 5 Bi Directional 6 a ere Bi Directional 3 Interface Only 4 Sys Test Only 7 Sys Test Only 7 Interface Only 4 Bi Directional 3 Optical at Local End 8 Optical at Local End 8 1 Alternate Loopback Mode switch Front Panel position 8 set to Normal Open 2 Alternate Loopback Mode switch Front Panel position 8 set to Alternate Closed 3 Setting Loop s
44. i atio ote lanl Ht a toti 25 3 3 3 Model R2R te erect tree e e ee ei e e e eie e Erbe eee ees 25 2270 Fiber Optic Modem 3 4 Programmable Buffered ECL Interface Model ECL 26 3 5 RS 530 Interface Model R30 scccssesisccssssssesssossvascversacevasdsecossesnansrensseccoossses 28 3 0 TIE IMtOr aces Feet 30 3 6 1 Transparent Bipolar Models B1 B2 BB oooonnocinncincnnociconnconnnonnnonnoonccnnocononos 30 3 6 2 4DST TI Model T1 tree reet Te susci a sosta ede eden 32 3 7 TTL BNC Interface Model BN oerte tee ern eset erbe ean Goba te erae aaa epa roa Ea 32 3 8 CCITT V 35 Interface Model 35 5 iiie eo erre perta steve rS avbe pna eae nb rae poen eene eden 33 3 9 Programmable Buffered Interface Model P53 ees 34 3 9 1 Generic Interface Wire Wrap Header P N 6100030 006 38 3 9 2 External Station Wire Wrap Header P N 6100030 004 sss 39 3 9 3 Internal Wire Wrap Header P N 6100030 005 sss 40 3 9 4 External Wire Wrap Header P N 6100030 001 sss 41 3 9 5 DTE Adapter iue tee eI ed teca rate nete eee det vag 42 3 9 6 ee gacy Adapter OT 43 3 10 High Speed RS 422 Mil Std 188 114C Interfaces eere 44 3 101 Model TW Re riter tee se a led PE e eO de CO 45 3 10 2 Model IWS eie tla dd dados 46 3 10 3 Model Tiida ee reed ret dre rte ete reete title 46 3104 Model scere it
45. if the application requires full rate agility without changing switch configuration that extends below 6 Mbps then the settings listed below should be followed TXPWR RX SENS MIN LOSS MAX LOSS LO LO 0 5 LO HI 5 10 HI LO 10 13 HI HI 13 15 12 Figure 1 2 Locations of Various Switches 2270 Fiber Optic Modem These settings give minimum and maximum losses for each of the four possible switch combina tions There is overlap between these ranges that is guaranteed to meet or exceed 1 0 dB from the transition points The performance of every modem is guaranteed to fit the parameters given above Some modems may significantly exceed these performance limits but reliable operation and unit interchangeabil ity is not guaranteed outside of these limits 1 10 Switch and Jumper Settings See Figure 1 2 for the location of specific switches and jumpers Tables 1 C and 1 D summarize the functions of the 2270 s switches and jumpers 1 11 Mean Time Between Failures MTBF The 2270 s Mean Time Between Failures MTBF figure 62 500 hours calculated has been determined from calculations that are similar to MIL 217E It assumes a Ground Benign environ ment and excludes failures which are not service affecting This MTBF figure is for a Rack Mount 2270 with a MIL STD 188 114C interface Model 2270 R TW8 11 08 0 SIGNAL GND o o Lam CHASSIS FLOAT O OSCILLATOI
46. ine the CS control output from the modem will drive to the ON state 3 3 4 Model R2R The RS input control is biased to the OFF negative voltage state If a connection is not made to this line the CS control output from the modem will drive to the OFF state This interface provides the Clear to Send CS control as balanced output i e the B lead pin 27 is active rather than at signal ground 25 Canoga Perkins 3 4 Programmable Buffered ECL Interface Model ECL This interface uses standard 10KH ECL biased to 5 2V to allow operation over 110 ohm twisted pair cable up to a maximum speed of 20 Mbps The maximum cable length recommended is 25 feet This interface is identical to the Model P53 described in Section 3 9 with the following excep tions 1 The pin numbering of the J3 wire wrap header is different Note however that the pin assign ments for the interface connectors J1 and J2 are the same as those for the Model P53 See Figure 3 2 2 The electrical characteristics for the 10KHECL differential signals are as follows e Input z 10022 10 e Output z 500 410 e Output Voltage Swing 0 9 410 VDC and 1 75 5 VDC The delay line values are shown in Table 3 E This interface is typically used to interface with the RED clear side of data encryption eguipment such as the KG 95 In these applications the interface acts as a tail circuit adapter device This configuration allows the modem to accep
47. it will require unplugging the modem and reinserting it or recycling the power off and on to reset the 2270 FAR END OPTICAL ELECTRICAL 2270 NEAR USER END DEVICE ELECTRICAL OPTICAL 56 Figure 5 5 Bi Directional Remote Loopback Active Figure 5 6 Opti cal at Local End Loopback Active 2270 Fiber Optic Modem 5 2 3 System Loopback Test This section describes the System Test Remote Loopback test feature in detail See Figure 5 1 for an illustration of System Test The System Test provides a simple way to verify most of the components in a 2270 link without any special test equipment Both optical transmitters Both optical receivers Both transmit and receive optical fibers The far end electrical interface and user device via the far end local loopback The near end electrical interface and user device via the near end local loopback Oo RON Three loopback points are set in the system during the System Loopback test One is set at the far end modem electrical interface another at the far end modem optical interface and another at the near end electrical interface see Figure 5 1 To activate the System Loopback test set the Loop switch to REM or drive the electrical interface Remote Loopback control lead in the electrical interface to the ACTIVE positive voltage state Refer to Section 3 Data Interfaces for pin numbers When activated the near end modem will begin transmitting a test pattern
48. loss budget 16 1310 nm ST 10 dB loss budget INTERFACE OPTIONS 22 RS 422 RTS LOW DC37 32 RS 232 DB25 35 V 35 MRC34 D22 HIGH SPEED 20Mb RS422 DC37 D88 MIL 188 114 DC37 H22 RS 422 RTS HI DC37 ECL PROGRAMMABLE BUFFERED ECL HSSI COMPATIBLE TO 20 Mbps DB25 P53 PROGRAMMABLE 8 BIT BUFFER EXTERNAL CLOCK RS422 DB25 R30 RS 530 DB25 TW 422 TWINAX TW8 MIL 188 114 TWINAX T22 422 5 CONN TWINAX T88 MIL 188 114 5 CONN TWINAX 000 NO INTERFACE CONSULT FACTORY TO CONFIRM CONFIGURATION 62 2270 Fiber Optic Modem Appendix A Warranty Limited Lifetime Warranty Effective July 1 2005 and After Canoga Perkins warrants that at the time of sale and for its lifetime with certain exceptions noted below every Canoga Perkins labeled product purchased will be free from defects in material and workmanship for its lifetime if properly installed and used in conformity to Canoga Perkins published specifications This warranty covers the original user only and is not transferable For the purposes of this Warranty lifetime is defined as the serviceable life of the product a minimum of 5 years or any longer period during which replacement spare parts are available Subject to the conditions and limitations set forth below Canoga Perkins will at its option either repair or replace any part of its product s that prove defective by reason of improper workmanship or materials The warranty period for p
49. lures MT BF esee ecce ee eene en eee nue 13 Chapter 2 Installation err 16 ZA Unpackino the Unit 16 2 2 Standalone Modem Installation soosseossooesooesosssssesssecssoossoosssoesssesssosssoosso 16 2 3 2202 Modem Shelf Installation ssccccssscssssccssssccsccsccssssescssssscesseseesees 16 2 4 Fiber Cable and Connectors s cccsocsscscccoussesassessns sescsecvocssendeseessssseasscenacssenacdies 17 2 9 DC POWER Mc 17 2 6 Rack Chassis Installation ceres eere eee eene eren nene en netta netten se tna seen 18 2 7 Mode and Rate Selection i eric ror rtt aa koe e ae E PERO Een 18 2 7 1 External Clock Operation sssssssseseeeeeeeeeene enne enne 18 2 72 Internal Clock Operation sica litis 18 2 7 3 Asynchronous Operation sess nnne 20 DAA BatasRatesu i mere ues eer es ote eate det epum fe dedni 20 2 7 5 Data Rate vs Module Frequency seen 20 2 7 6 Slave Clock Operation sessssseseseeeeeenene enne enne 20 2 7 7 Consideration of Propagation Delays eee 20 Chapter 3 Data Interface cnica o eU aa 23 3 1 Electrical Data Interfaces s s sni terrere eto rkoa ener ee tan voL epe e SPEED n 23 3 2 RS 232C 423 Interface Model 32 eres rtr aaa 23 3 3 RS 449 427 Interfaces A io 23 3 3 1 Jumper Strap Settings s epe e eee ee nee Hee Ure eto Coe ee 24 3 3 1 ModeL 22 iei daa 25 3 3 2 Model H22 1
50. m Receive Clock from modem Transmit Clock from modem External Tx Clock to modem Data Terminal Ready to modem Local Loopback Loopback Remote Loopback Loopback Test Mode from modem These signals are single ended and activate a modem s system test All other signals are balanced 28 2270 Fiber Optic Modem Table 3 G RS 530 Jumper Options Jumper Options CHASSIS GND Jumper 100 Ohm position Connects chassis ground to signal ground through 100 ohm resistor SHORT position Connects chassis ground directly to signal ground Factory Setting 100 OHM RLY Jumper NC position CD Carrier Detect alarm relay contact closes on alarm condition or power loss NO position Opposite state of relay contact Factory Setting NC DSR Jumper TEST position DSR Data Set Ready is asserted whenever a Test or Loopback condition is not present EIA DSR is asserted in Test or Loopback condition only if testing is being conducted through the interface Factory Setting TEST CTS GATE Jumper ON position CTS Clear to Send is asserted after a delay from RTS Request to Send CD position CTS also needs the presence of the valid optical receive Carrier Detect CD Factory Setting ON RTS BIAS Jumper OFF position RTS Request to Send input is detected as an OFF negated condition if input signal is not provided ON position ON asserted state of RTS if input signal is not provided Factory Setting OFF CTS Out Jumper CT
51. n is also available refer to Section 4 8 1 2 Functions LEDs and Switches The 2270 standalone modems do not have an on off switch since they power up when plugged in For 2270 Rack Mount configurations a power supply on off switch is located at the rear of each power supply assembly on the 2201 Rack Chassis An eight section switch bank located on the front panel of the 2270 see Figure 1 1 controls all operating modes and internal clock rates Switch positions 1 2 and 3 select the internal clock operating rates Refer to Table 2 B for data rate switch settings The rates depend on the crystal option installed Refer to Section 7 5 for a list of crystal options available The 08 crystal is installed as the factory default crystal unless an alternate crystal is ordered Table 1 A Available Modem Controls DATA CLOCK CONTROLS TRANSMIT DATA REQUEST TO SEND RECEIVE DATA CLEAR TO SEND TRANSMIT CLOCK DATA CARRIER READY RECEIVE CLOCK DATA SET READY Figure 1 1 Front Panel Mode Rate Switch 2270 Fiber Optic Modem OPEN oc MUN NN NI GN RATE MODE ALTERNATE LOOPBACK FUNCTIONS FLOW CONTROL FACTORY SETTING RATE O EXTERNAL CLOCK MODE NO FLOW CONTROL NORMAL LOOPBACK The rate setting determines what rate the modem will operate at if set to the Internal Clocking Mode or the rate used when a modem set to the Slave Clocking Mode is set for local loopback The modes are e Ext
52. n the other fiber optic versions 1 9 1 Optical Power Switch HP Laser Version Only The Optical Power Switch TX POWER provides two settings for optical transmission levels The LO switch setting is intended for use with short fiber optic lengths i e a cable and connector power loss total of less than 10 dB The HI switch setting is intended for longer cable runs up to the maximum power loss budget 1 9 2 Sensitivity Switch HP Laser Version Only The Sensitivity Switch RX SENS provides two settings for optical receiver sensitivity The LO Switch setting is intended for short fiber lengths in conjunction with LO optical power at the other end The LO setting must be used with a fiber link loss of 5 dB or less 1 9 3 Optical Switch Settings HP Laser Version Only The proper setting of the Optical Transmit Power and Optical Receive Sensitivity Switches are based on the loss measured on the fiber at a wavelength of 1300 nm The 2270 should be used as an optical power source when performing these measurements The loss on the fiber link determines the setting of the Tx Power Switch atthe transmitting end and the Rx Sensitivity Switch at the receiving end It is important to remember that the switch settings are determined separately for each fiber in the pair When operating the modem at rates above 6 Mbps the HI HI setting can always be used HI HI refers to HI Tx power and HI Rx sensitivity If the modem is to be operated below 6 Mbps or
53. nd frame ground Signal Ground signal ground Send Data to modem Send Timing from modem Receive Data from modem RS RTS b c d e Request To Send to modem RT SCR Receive Timing from modem CS CTS d e Clear To Send from modem LL LT a Local Loopback Test to modem RR DCD e Receiver Ready Data Carrier Detect from modem RL RT a Remote System Test to modem TT SCTE Terminal Timing to modem DM DSR Data Mode Data Set Ready from modem The 2270 amp 2290 Modems include a built in Loopback Test feature Two normal test lines RS 423 pins 10 and 14 are used for this interface loop Refer to Chapter 5 Troubleshooting for a more thorough description of this feature Model 22 Request To Send is held low when there is no connection or the interface connection is removed Model H22 Request To Send is held high when the user s device does not supply an RS input or the interface connection is removed Model R2R Request To Send is held low as with the 22 Clear To Send is provided as a balanced output Only local handshake is supported 3 3 2 Model 22 The RS input control is biased to the OFF negative voltage state If a connection is not made to this line the CS control output from the modem will drive to the OFF state 3 3 3 Model H22 The specific difference between the H22 model and the standard 22 model is that the RS input control is biased to the ON positive voltage state If a connection is not made to this l
54. odem When the modem is the source of the transmit clock there is a finite time delay before that clock arrives at the DTE to clock its transmitter There is another time delay before the data from the DTE arrives back at the modem Since the modem uses its own clock signal to align the data there is a potential for these delays to make the data invalid at the point of realignment This problem only occurs at high data rates and if the cable to the DTE is very long or has high capacitance There are two methods used to compensate for this possible misalignment between the clock and data First the SCT clock may be inverted refer to Section 2 7 7 1 or the SCT clock may be returned on the external clock leads refer to Section 2 7 7 2 2 7 7 1 Clock Polarity Option The modem supplies clock to the DTE on the SCT interface line Due to transmission and DTE data delays this clock may not be properly phased to the transmit data If the DTE cannot return this clock back toward the modem on the SCTE or equivalent leads then the polarity of the SCT clock may be inverted to compensate for the delay Table 2 B Data Rate Switch Position vs Oscillator Part Number Oscillator Part Numbers C losed O pen M megabits K kilobits 2200 C 01 2200 C 02 2200 C 03 2200 C 04 2200 C 05 2200 C 06 10 752M 12 352M 12 624M 5 376M 6 176M 6 312M 2 688M 3 088M 3 156M 1 344M 1 544M 1 578M 448 0K 514 7K 526 0K 224 0K 257 3K 263 0K 112 0K 128 7K 131 5K
55. ower supplies fans and optics is five 5 years Consumables such as filters are covered for one year Software is warranted for 90 days The warranty period for Hardened Media Converter HS products is three 3 years This warranty does not cover any damage to products that have been subjected to lightning or other Acts of Nature misuse neglect accident damage improper installation or maintenance including over voltage failures caused by use outside of the product s specified rating normal wear and tear of mechanical components or alteration or repair by anyone other than Canoga Perkins or its authorized representative If the user is unsure about the proper means of installing or using the equipment contact Canoga Perkins free technical support services Customer must notify Canoga Perkins promptly in writing of any claim based on warranty Canoga Perkins is not liable for and does not cover under warranty any costs associated with servicing and or the installation of its products of for any inspection packing or labor costs in connection with return of goods In the event Canoga Perkins breaches its obligation of warranty customer s sole and exclusive remedy is limited to replacement repair or credit of the purchase price at Canoga Perkins option Under no circumstance will Canoga Perkins be liable for consequential or incidental damages or loss of profits Warranty Registration To establish original ownership and to record pur
56. p On indicator Blinking Step 3 Setting Loop switch on local modem to Rem causes both interfaces to loopback Local modem s Loop On indicator Blinking Remote modem s Data Rx indicator Blinking Step 4 Setting Loop switch on local modem to OFF returns it to normal operation Step 1 Setting Loop switch on local modem to Rem causes modems to enter System Test Mode as in Figure 5 1 Local modem s Loop On indicator ON Data Rx Blinking Remote modem s Loop On indicator ON Data Rx Blinking Step 2 Setting Loop switch on local modem to OFF returns it to normal operation Step 1 Setting Loop switch on local modem to Rem causes the local modem to enter loopback as in Figure 5 6 Step 2 Setting Loop switch on local modem to OFF returns it to normal operation 54 Figure 5 2 Bi Directional Local Loopback Active Figure 5 3 Interface Only Local Loopback Active Figure 5 4 Optical Only Remote Loopback Active 2270 Fiber Optic Modem 5 2 1 Local Loopback Test When activated the local loopback test will cause all data transmission from the near end local user device to be looped back toward the receive of that same device No data is looped back to the far end remote user device unless a bidirectional Local Loopback method is selected refer to Table 5 A Loopback Options The loopback point is set at the electrical interface of the local modem see Figures 5 2 and 5 3 Refer to Chapter 3 Data Interf
57. s Rx Line Out B3 31 Canoga Perkins 3 6 2 DS1 T1 Model T1 This interface is compatible with AMI coded T1 data only If line coding is other than AMI such as B8ZS then a model B type interface must be used NOTE This interface corrects bipolar violations Ifthese violations must pass through for fault detection a model B type interface must be used NOTE This interface is compatible with clock and data transmission The other end of the link can have a variety of interfaces e g 32 22 35 etc if required A special four position feed through terminal block is provided for connecting the T1 twisted pairs to the 2270 modem The standalone version has the terminal positions marked on the rear of the unit The DS1 T1 rack mount versions do not have any external indication as to which pair should be connected to which terminals however these positions are indicated on the circuit board When viewing the 2201 Rack Chassis from the rear the upper two terminals are for the transmit pair and the lower two are for the receive pair The T1 interface wires are secured by inserting them into the square aperture under the terminal screw Tightening the terminal screw clamps the wire in position An access hole for a diagnostic probe is provided above the clamping screw NOTE When using the DS1 T1 interface the modem must be configured for external clock 3 7 TTL BNC Interface Model BN This model uses BNC ba
58. s budget for the modem go to Step 3 If the cable loss is within the specified loss budget for the modem go to Step 5 NOTE The link loss should be at least 3 dB lower than the loss budget speci fied for the modem This design margin will compensate for LED Laser aging and small changes in the actual link loss Cable loss exceeds Defective F O cable Repolish or replace modem loss budget defective connectors Cable loss exceeds Defective F O connectors Repair or replace modem loss budget defective cable Set up BERT for the proper clocking data rate and format as used with the circuit Use the existing interface cables if possible Connect the BERT in place of the local user device Connect a data clock loopback connector in place of the remote user device Run the BERT test and go to the next step System loopback test Modem not configured Verify correct switch and passes but modems properly strap settings on modem will not pass data and devices System loopback test Interface cables damage Repair damaged or passes but modems or miswired miswired cables will not pass data Optically loopback each modem and repeat BERT test as detailed in Step 5 Modem fails BERT test Defective modem or Replace defective modem when optically looped electrical interface back to itself 59 Canoga Perkins Chapter 7 Specifications 7 1 Diagnostic Indicators and Controls System Test Optical Power Rx Tx Power On Power Alarms 2201 7 2 Optical
59. s important to keep all connectors free of water dust dirt etc When not in use the connectors should be covered with protective plastic caps 1 8 2 Initial Unit Testing The following is a basic list of check points to consider e Have you set your optical power and receiver sensitivity switches correctly for the loss of the fiber optic link e Are the fiber optic cables marked correctly Connect the Tx cable to the Tx connec tor the Rx cable to the Rx connector If System Test fails try swapping cables at one end of the link 11 Canoga Perkins e Are you using the correct clock mode internal external for synchronous trans mission e Have the modem s mode and rate switches been set properly The 2270 is set to the external clock mode at the factory e Ifyou have problems after carefully checking these items turn to Chapter 5 Trouble shooting 1 9 Sensitivity and Optical Power Switches HP Laser Version Only A dual section switch block is located between the transmit and receive optical connectors see Figure 1 3 The section nearest the transmit connector controls the optical transmit power level The section nearest the receiver controls the receiver sensitivity For both switch functions ON selects HI and OFF selects LO For standalone modems ON UP and LO DOWN for rack mount modems ON RIGHT and LO LEFT This feature is only required for the HP laser fiber optic version These switches are not provided i
60. sider a 7 km data link using 8 10 single mode optical fiber that has a measured power loss of 3 5 dB and a patch panel connector loss of 1 dB for a total link loss of 4 5 dB The minimum launch power of the 2270 High Power HP laser version is 6 dBm in high power mode and the worst case receiver sensitivity is 21 dBm The guaranteed loss budget is 15 dB Subtracting the 4 5 dB link loss from the 15 dB loss budget leaves a margin of 10 5 dB which is within the suggested limit NOTE Optical power measurements for the 2270 are sensitive to the data rate All mea surements quoted are for a 20 Mbps data rate 1 7 Optical Bandwidth The 2270 requires nearly 70 MHz of optical bandwidth As a result the specified fiber optic cable must provide this bandwidth at the required distance For example if 500 MHz km fiber is used this bandwidth requirement will limit the end to end distance to 7 km 70 MHz multiplied by 7 km 490 MHz 1 8 General Installation 1 8 1 Fiber Optic Cable and Connectors The 2270 can be used with virtually any size of multimode or single mode fiber optic cable depending on optical interface including 50 125 62 5 125 and 8 10 125 Do not mix multimode and single mode fiber optic cables The proposed fiber optic cable must provide adequate bandwidth and power loss characteristics for the intended modem link Fiber optic connectors terminated on the cable must match those terminated on the modem CAUTION It i
61. ssoesssosecooossoossssosesosssssesessesesso OU 7 1 Diagnostic Indicators and Controls ssessseoesoossoossosssssesssesesoossoossssossosesssee 60 7 2 Optical A A nan OU Rd AA A OL 7 4 Physical Dimensions sivina ai ae aii OL 7 5 2270 Fiber Optic Modem Configurations eeeeeeeeeeeeeeeeeeee 02 Appendix A Limited Lifetime Warrant ceeeeeeeeee eee eene eee en eee ee eee 03 List of Figures Figure Page 1 1 Front Panel Mode Rate Switch eese creer e eee ee reete eene eene sane roo o stans etse sane sane 9 1 2 Locations of Various Switches eeeee esset eere eee ee sane en enean tn ness tn nas tn seen sse sano sane 13 2 1 Model 2202 Standalone Modem Shelf eere sane eese eene eene eene senno 16 2 2 2201 Rack Chassis Front View with Modems Installed eeereeeeeeeee 19 3 1 2270 Interchangeable Interfaces eese eee eee eese eene enses etna aetas tns nosna tn stas en natn ae 3 2 Starrping Options for Progammable Buffered ECL Interface es 3 3 Transparent Bipolar Interface Connectors eee esee eese eese ee etes nena ne tnn tn ne sane 3 4 Available Strapping Options for Programmable Buffered Interface 3 5 Board Layout and Modules for Programmable Buffered Interface 3 6 Programmable Buffered Interface Model P53 DCE RS 530
62. st Out Delay Line and Inverter circuitry allows you to custom ize the configuration for a variety of standard and nonstandard synchronous clocking arrange ments Interface configuration is accomplished via an on card wire wrap header J3 and a four position DIP switch This interface offers flexible control configurations as well as clock and data The standard configuration for this interface is DCE with DB 25S connector Two connector adapters are provided with each interface The DCE DTE adapter converts the physical interface to DTE with DB 25P The Legacy adapter converts the interface from DCE to the pinout of the original P2 interface product Figure 3 4 illustrates the resources available for configuring via the J3 wire wrap header A wide variety of configurations are possible to satisfy many requirements This interface is typically used to interface with encryption devices on the BLACK side where the modems act as the network and supply clocking in a synchronous configuration or to interface to the RED clear side of data encryption KG equipment In the RED application the interface acts as a tail circuit adapter device This configuration allows the modem to accept two synchronous clock typically DCE devices only accept one one for transmit external clock and one for receive FIFO input clock Another common application is with systems that communicate over geosynchronous satellites In this application the FIFO is
63. t TWO synchronous clocks typically DCE devices only accept one one for transmit external clock and one for receive FIFO output clock Another common application is with systems that communicate over geosynchronous satellites In this application the FIFO makes up for clock drift doppler shift caused by the satellite s elliptical orbit around the earth The FIFO allows the user to recondition either the received or transmitted data not both The delay line in conjunction with a four position DIP switch provides an option for fine tuning the relationship between clock and data timing in a range of from 20 to 170 nanoseconds in steps of 10 nanoseconds 26 Interface PINS J1 20 21 J1 9 10 J1 23 24 J1 12 13 Figure 3 2 Strapping Options 1558 for Programmable Buffered ECL Interface Ji 9 4 J1 14 15 J1 7 J1 1 Rx Data Rx Clock Rx Clock2 spare Send Clock FIFO Clock user Term Clock Send Data Sig Gnd Frm Gnd y VVVY AAA A OON 2270 Fiber Optic Modem Data Out Data In FIFO FO from fiber o 5 RX circuits O amp 17 i 6 19 20 8 in 18 7 out 16 Delay Line out 10 Ai 14 Tx Clock x FO E 2 13 TxData fiber Tx t y 4 circuits WIRE WRAP HEADER J3 a in Table 3 E Delay Times for Programmable Buffered ECL Interfaces 1 2 0000000000000000 0000000000000000 SW1 Position O pen C losed 3 0000000000000000 Delay Time 8ns
64. t may increase eye hazard Use of controls or adjustments or performing procedures other than those specified herein may result in hazardous radiation exposure Under normal conditions the radiation levels emitted by this product are under the Class 1 limits in 21 CFR Chapter 1 Subchapter J Notice This device contains static sensitive components It should be handled only with proper Electrostatic Discharge ESD grounding procedures Canoga Perkins Table of Contents Chapter 1 GC emer al er 8 1 1 Equipment Description rr bi e 8 1 2 Functions LEDs and Switches cccccscsssssesssesssesesesescsesssesesesesecescececesess 8 L3 2201 R ck Classis as 10 1 4 2202 Modem Shelf eerie is 10 1 5 Fiber Optic Versions encina 10 1 6 Loss Budgeta uo ee RA o a Dione ae 11 1 7 Optical Bandwidth rr 11 1 8 General Installation icti neto esee intu eoe eno see Pico aC EIN oe ERES VEN Oe DURER RE eee 11 1 8 1 Fiber Optic Cable and Connectors esses 11 1 8 2 Initial Unit Testing 11 1 9 Sensitivity and Optical Power Switches HP Laser Version Only 12 1 9 1 Optical Power Switch HP Laser Version Only 12 1 9 2 Sensitivity Switch HP Laser Version Only seen 12 1 9 3 Optical Switch Settings HP Laser Version Only 12 1 10 Switch and Jumper Setting eeeee reser eese eese reete eerte netten atas no 13 1 11 Mean Time Between Fai
65. the incoming clock for the transmitter and check the cables to be sure they support SCTE 22 Figure 3 1 2270 Interchangeable Interfaces 2270 Fiber Optic Modem Chapter 3 Data Interfaces 3 1 Electrical Data Interfaces A variety of interfaces are available with the 2270 Modem Each is designed to conform with existing standards Refer to Section 7 Specifications for applicable configurations standards and physical connector types 3 2 RS 232C 423 Interface Model 32 This interface is electrically compatible with EIA RS 423A It will also operate with RS 232C systems when adhering to the more limiting RS 232C specifications 50 foot distance and 20 kbps data rate EIA standard RS 423 does not reference physical connector type or pinouts This RS 423 interface uses the physical connector type and pinouts specified in RS 232C refer to Table 3 A The RS 232C 423 interface uses a 25 pin female D type connector for the physical connection NOTE The control leads support only a local handshake 3 3 RS 449 422 Interfaces The RS 449 422 interface is available in several models to suit a wide range of user requirements Table 3 B lists the standard models This interface is compatible with EIA Standard RS 449 It uses a standard 37 position female D type connector DC 37 Pin assignments for each of the models are outlined in Table 3 C The control leads follow the RTS 423 electrical standard The B leads for DM pin
66. to the far end modem and the Loop On indicator will light When the far end modem detects the test pattern presence the Loop On indicator will light and the Rx Data indicator will blink This means that the test pattern was properly received and that the System Test optical loopback has activated The far end modem will then return the test pattern back to the near end modem Also all data transmission from the far end user device will be looped back toward the receive of that same device When the near end modem detects the presence of the returned test pattern the Rx Data indica tor will blink This indicates that the test pattern was properly received at both ends of the link NOTE When a System Test is successful both Rx indicators should be blinking approxi mately twice per second and both Loop On indicators should be solidly lit Ifthe Rx indicators do not blink at a steady rate or if the Loop On indicators do not solidly light the System Test is failing or intermittent and the link requires repair The data rate of the System Test pattern generator is set by selecting the internal clock rate as given in Table 2 B NOTE The pattern used is a 27 1 pseudorandom pattern Do not use this pattern for checking through the interfaces unless the data checker is disabled by the TST OFF jumper or by selecting a remote test option from Table 5 A which excludes the System Test feature 57 Canoga Perkins Chapter 6 Diagnostic
67. ures including local audible visible and remote power failure alarms op tional redundant power supply and the ability to allow modem removal from the chassis without powering down the entire system Refer to the 2201 Rack Chassis User Manual for more details 1 4 2202 Modem Shelf The 2202 Modem Shelf accommodates one or two standalone 2200 series modems It is de signed to fit easily into a 19 inch equipment rack The modems can be secured side by side in the shelf Refer to the 2202 Modem Shelf User Manual for more details 1 5 Fiber Optic Versions Three fiber optic versions provide solutions to virtually any fiber optic plant including 50 125 or 62 5 125 multimode and 8 10 125 single mode Table 1 B summarizes the three fiber optic versions Table 1 B Guaranteed Loss Budgets Optics Option 8 10 50 62 5 Min Launch SM MM MM Power dBm 850nmLeD 850nmLeD LED Typical loss budgets are 2 dB higher N A Not Applicable 10 2270 Fiber Optic Modem 1 6 Loss Budget The maximum possible distances with either standard or long distance versions is dependent on the overall power loss over the fiber optic link This is called the link loss The launch power for the modem is compared with receiver sensitivity The determination of the difference is the loss budget refer to Table 1 B To insure normal operation over a long term the link loss should be at least 3 dB less than the loss budget for the modem For example con
68. witch on local modem to Loc causes local modem to enter loopback as in Figure 5 2 Local modem s Loop On indicator lt ON Setting Loop switch on local modem to OFF returns it to normal operation 4 Setting Loop switch on local modem to Loc causes local modem to enter loopback as in Figure 5 3 Local modem s Loop On indicator lt ON Setting Loop switch on local modem to OFF returns it to normal operation Step 1 Setting Loop switch on local modem to Rem causes modems to enter System Test Mode as in Figure 5 1 Local modem s Loop On indicator ON Data Rx Blinking Remote modem s Loop On indicator ON Data Rx Blinking Step 2 Setting Loop switch on local modem to OFF causes the remote modem to enter loopback as in Figure 5 4 Local modem s Loop On indicator ON Remote modem s Loop On indicator Blinking Step 3 Setting Loop switch on local modem to Rem causes both interfaces to loopback Local modem s Loop On indicator Blinking Remote modem s Data Rx Blinking Step 4 Setting Loop switch on local modem to OFF returns it to normal operation Step 1 Setting Loop switch on local modem to Rem causes the modems to enter System Test Mode as in Figure 5 1 Local modem s Loop On indicator ON Data Rx Blinking Remote modem s Loop On indicator ON Data Rx Blinking Step 2 Setting Loop switch on local modem to OFF causes remote modem to enter loopback as in Figure 5 5 Local modem s Loop On indicator ON Remote modem s Loo
69. y cycle of the optical signal is close to 50 only at 20 Mbps It reduces proportionally with the data rate such that it is only 0 0025 at 1 kbps A special optical receiver circuit converts the incoming signal to ECL level for demodulation The clock is extracted by a very simple method which ensures a good Bit Count Integrity BCI The data is dependent on sampling the width of each pulse These are converted to 5V logic levels which are passed through the loopback and test pattern detect circuits before connecting to the interface 4 5 Full Rate Agility The 2270 operates to full specifications over a range of rates from 1 kbps to 20 Mbps Changing data rates does not require resetting switches or jumpers except to set the clocking modes and the speed of the internal or self test rate clock 50 Figure 4 3 Data Organization with PWM Optics 2270 Fiber Optic Modem 4 6 Bit Count Integrity The 2270 s design enables a much better integrity for the clock than the data The data Bit Error Rate BER can be summarized as no more than one bit error in 10 bits The Bit Count Integrity BCI can be summarized as no more than one count missed in 1400 hours pa Pee INTERFACE DATA INPUT eee ae ee ale ue ey K op ESSE CLOCK INPUT l l l OPTICAL SIGNAL 4 BI CELLS ES 4 7 Duty Cycle Tolerance The 2270 will accept any clock input duty cycle between 30 and 70 Above data rates
70. y slip the power cord strain relief grommet out of its mounting slot and fit it to the new rear panel The unit may then be assembled in the reverse order of the disassembly Figure 4 1 2270 Circuit Board Diagram 2270 Fiber Optic Modem Chapter 4 Modem Operation 4 1 Modem Operation Though the actual electronic connection between the data equipment interface and a 2270 Modem differs from model to model the electronic conversion from voltage level to optical level is similar in all applications Figure 4 1 provides a functional block diagram of a typical 2270 Modem For simplicity the test circuits are not shown The internal clock is shown with a broken line The modem is shipped from the factory set to use the external clock The optional clock may be selected via front panel switches at the time of installation OPTICAL TRANSMITTER D INTERFACE RECEIVER 4 2 Fiber Optics Since light is the transmission medium being used between modems there are other advantages over conventional copper wire In effect most problems normally associated with large multicon ductor cables are eliminated These include not only interface distance but also grounding prob lems Electromagnetic Interference EMI Radio Frequency Interference RFI and signal radia tion This latter factor is of particular importance where security of the system is important and for compliance with FCC compatibility regulations 49 Canoga Perkins
71. y the optical cable loss Remove the Tx fiber from the modem Use the optical power meter and fiber optic jumper cable to determine the optical launch power for this modem Reconnect the Tx fiber to the modem Remove the Rx fiber from the modem and determine the optical receive power into this modem Reconnect the Rx fiber to the modem Repeat these steps for the modem at the other end and record both optical power levels NOTE Optical power readings are dependent on data rate To make accurate optical power measurements use a 20 Mbps data rate If the modem is normally operating at a rate other than 20 Mbps use the internal clock mode to obtain the maximum operating speed refer to Section 2 7 2 The standard Internal Clock Oscillator 08 with a rate switch setting of CCC results in an operating speed of 20 Mbps Use this mode and speed for making optical power measurements 58 Step 2 cont 2270 Fiber Optic Modem Symptom Possible Cause s Action Perform the following optical loss calculation e Local Receiver level minus remote Transmit level near end link loss figure e Remote Receive level minus local Transmit level far end link loss figure Check the optical cable loss figure against the optical link loss budget specified in Table 1 B for the specific fiber optic modem For the HP Laser version check that the Tx PWR and Rs SENS switches are set according to Section 1 10 3 If the actual cable loss still exceeds the los
72. yonet connectors for the physical interface The electrical signal char acteristics are unbalanced TTL levels with only the clock and data circuits supported Four BNC connectors are supplied for connection to a DTE device High speeds and long distances clock and data only can be achieved using this interface This interface version has a switchable dual purpose port for the Send Timing SCT and Terminal Timing SCTE clock signals A two position slide switch S1 on the interface card controls the port direction When the switch is set towards the BNC connectors the port is configured as an input for the SCTE clock Sliding the switch away from the BNC connectors configures the port as an output for the SCT clock See Figure 3 6 for connectors and refer to Table 3 K for signals supported NOTE When setting up the clock select the proper main circuit board clock mode must be set correctly i e external for the SCTE clock input slave or internal for the SCT clock output 32 2270 Fiber Optic Modem 3 8 CCITT V 35 Interface Model 35 This interface is compatible with CCITT recommendation V 35 Appendix II electrical characteris tics for balanced double current interchange circuits The RTS control input is biased to the OFF state If a connection is not made to this line the CTS control output will drive to the OFF negative voltage state Recommended cable is a twisted multi pair type with a characteristic impedance

Canoga Perkins 2270 Fiber Optic Modem User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents