ALMA-54.05.00.00-70.35.30.00-A-ICD
Contents
1. ALMA Project Doc ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 10 of 20 And Computing Control Software 4 3 SUMMARY OF CONTROL POINTS Control data shall be transmitted by the ALMA bus master according to the protocol specified in AD 01 RELATIVE SUGGESTED CAN INTERVAL ADDRESS BYTES SECS TIMING EVENT RELATED The relative CAN addresses are for the first device at the node For the second device the addresses should be increased by 0x18000 ALMA Project Doc ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 11 of 20 And Computing Control Software 4 4 MONITOR POINTS IN DETAIL 4 4 1 GET STATUS P RCA 0x00020 0x1 8020 Description Primary Status Word ub te 0 Status lf bit 7 is set these give the reason for the PSU shutdown 0x0 7 0x1 The EDFA PSU is on and the EDFA is initializing SES S g Dat MGLD a reset from the SPI 0x1 2 e Unused undefined Status of serial port transfer buffer The buffer is ready to receive data from the SPI Data is being sent from the buffer to the EDFA Waiting for reply from the EDFA Data is being received by the buffer from EDFA There is a complete message in the buffer Timed out waiting for data A data overrun occurred while receiving EDFA data _ Unused un2. C operating point to 25 C and the maximum temperature to 30 C The minimum and maximum values define the limits for temperature alarms Reply is OK 0001 gt Set Temperature Reports the temperature settings for each laser Reports settings for laser 1 Reply is L1 20 25 30 0001 gt This signifies that for laser 1 the minimum temperature is 20 C the set point is 25 C and the maximum temperature is 30 C Note that on power up the lasers will not be supplied drive current until their submount temperatures are within the limits MGM EDFA Instruction Manual Table 6 Command set summary Mechanical a ee ee ee KE EE AD lt Unit address gt lt Password gt Address unit optional password l dimensions are shown in mm ADO kUnitaddress gt lt Password gt X Quietly address unit CA kSerial No gt lt Address gt X Change unit address AP X Displays amplifier powers Figure 2 Device Dimensions AS 1 2 X Displays status of amplifier 1 or 2 125 CP OldPassword New Password New Password X Change password 119 Hex value 0001 to FFFE EH X Reports whether an erbium heater is fitted Meteor only CL KEE X Replies 1 2 or N depending on which stage laser is fitted to or whether it is absent IPW bal D lt value gt X Sets or replies with input warning level Meteor only IT X Reads internal temperature of unit LO 1 2 D lt value gt X X Sets or disables LOS level for each stage S LO 1 2 X Repo
3. document does not imply freedom from Table 6 Command Set SUMMAYY EEN 14 patent or other rights of Nortel Networks EE OR Table 7 Mechanical Dimensions ENEE 15 p Table 8 Connector Pin out sossisssescccvancicvesesednsseiecnasisecsoieircetetnicneisictanttael 16 2001 Nortel Networks All rights reserved Nortel Networks the Nortel Networks Globemark and Unified Networks are trademarks of Nortel Networks All rights reserved Information in this document is subject to change without notice Nortel Networks assumes no responsibility for errors that might appear in this document Printed in England NORTEL NETWORKS Introduction This document provides the user with information relating to the use of the Nortel Networks MultiWavelength Gain EDFA Module Details on how to configure the unit via the serial port electrical connections digital control lines and power requirements are included For detailed optical and electrical characteristics please refer to the appropriate data sheet Optical Safety The MGM amplifier is rated according to the following classification Class 3B laser product in accordance with IEC825 1 1993 Class IIIb laser product in accordance with 21CFR 1040 10 Care must be taken to avoid exposure Description MGM amplifier modules may be specified for use in 1530 1563nm C Band and 1570 1603nm L Band DWDM optical transmission systems The module is designed for integration with a con
4. ALMA Monitor and Control Bus The microcontroller measures power supply voltage and current input and output optical power levels and heat sink temperature through its internal 10 bit analogue digital converter ADC It also monitors the digital fault lines from the EDFA It can turn the DC supply to the EDFA on and off and can disable or mute the EDFA optical output The microcontroller is powered by a 5 V supply obtained from a DC DC converter on the backplane This converter also powers the AMBSls The status of the system can be monitored and controlled via the AMB ALMA Project ALMA 54 05 00 00 70 35 30 00 A ICD 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 7 of 20 And Computing Control Software The controller will enter normal operation mode within one second of the application of DC power The EDFA power supply will be off and can only be turned on by the AMB issuing a command After applying power there is an initialization period of about three seconds during which EDFA derived faults are not monitored Operator notification is required if the status bytes report a fault i e if an analog measurement is outside the normal operating limits Specified as part of the relevant monitor points If a power supply or temperature measurement reaches a value that could cause component damage the power supply will be shut down These limits are outside the normal operating limits specified
5. Life Preamp 12 5W Dual Pump Line 23 5W Triple Pump Line 35W Ripple Noise gt 2 PP Transient Pulse 4 6V for 75ms 6 0V for 75ms Radiated Emissions EN5022 class B Conducted Emissions EN5022 class B Radiation Immunity IEC801 3 ESD 8kV to EN61000 4 2 MGM EDFA Instruction Manual Digital Input Signals Serial Communications Table 3 Digital inputs Port Imput Description Pin LogicState Action Management status reporting is available through the serial port ADI Pmannen MTE LOW Meriel eper TTL levels If connecting to an RS232 interface an interface converter to the pump lasers switched off TTL HIGH Pump laser s disabled Ga Wain Raae houd besed beegurei OPMI Output power mute output 20 TTL LOW Normal operation bo l power set to a maximum 5mW TTL HIGH Output set to 5mW 5V SC v NOTE THAT UNDER HIGH INPUT POWER CONDITIONS CONSIDERABLE OUTPUT POWER MAY EXIST EVEN WHEN THE ra eg AMPLIFIER IS DISABLED OR MUTED USE OF THESE INPUTS DOES NOT CONSTITUTE AN INTERLOCK AND THE e AMPLIFIER MUST STILL BE CONSIDERED AS CLASS IIIb 3b T C6 2 DJ Digital Output Signals Se Zu These signals are used as alarms for various system faults Table 4 summarises the functions These TTL Ee Gs oV compatible alarm outputs are all active high logic i e TTL LOW normal operation TTL HIGH alarm 9 WAY 3 H 74153655 Hysteresis is included on all alarms to prevent oscillation 18 R11 Table 4 Al
6. in this ICD The most common malfunction probably will be a low or zero reading of optical input power which might indicate a broken or disconnected fiber lf an analog measurement reaches a value that could cause component damage the EDFA power supply will be shut down These limits are outside the normal operating limits specified in this ICD A graceful shutdown of the EDFA is done by issuing the appropriate command but no damage will be caused by removing the 48 V power line The module must not be removed when power is applied to the EDFA 4 1 1 MAINTENANCE MODE The module can if a certain pin on the PCB Is grounded as the device is powered on be put into a maintenance mode In this mode the monitor and control interface described in this document is extended and includes a number of commands that are only useful when the module is on the bench Some of these commands allow limits to be overridden and hence may if not used carefully allow the hardware to be damaged These points are described in AD 05 Normal operation can occur while in maintenance mode but because it is possible to inadvertently damage the hardware the control software must shut down the power supplies and notify the operator if normal operations are to commence using a module that is operating in maintenance mode The GET _STATUS_P monitor point indicates when the module is in maintenance mode ALMA Project ALMA 54 05 00 00 70 35 30 00 A ICD 2006 01 2
7. node number 0x281 2 S Units 0 and 2 are connected to the AMBSI as device one and have RCAs ranging from 0x0001 to OxOOOFF Units 1 and 3 are connected to the AMBSI as device two and have RCAs ranging from 0x18000 to 0x180FF The RCAs listed below refer to device one and should be increased by 0x18000 for device two 4 1 4 INVALID ADDRESSES lf a monitor request is made from a RCA which is not listed in section 4 2 there will be no response from the module lf a control access is made to a point which is not listed in section 4 3 the accompanying data will be accepted but no further action will occur Ifthe length of a control access is greater than that specified in section 4 3 all the bytes will be accepted but only the appropriate number will be used starting with the first byte received ALMA Project Doc H ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 9 of 20 And Computing Control Software 4 2 SUMMARY OF MONITOR POINTS Monitor data shall be polled by the ALMA bus master according to the protocol specified in AD 01 RELATIVE SUGGESTED TIMING CAN a INTERVAL EVENT ADDRESS RELATED GET STATUS P GET STATUS E GET_OPIN_ POW GET_OPOUT_ POW ceri oom 8 Samp we eren nmn 8 Seesecion No The relative CAN addresses are for the first device at the node For the second device the addresses should be increased by 0x18000
8. 0 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 14 of 20 And Computing Control Software 4 4 7 GET HS TEMP Measured value of heat sink temperature Values are produced using a 10 bit analog to digital converter therefore valid readings will always be between 0 and 1023 An invalid result can be returned see Validity of Readings Suggested Interval Same as TE Related GET ODIN POW Data int16 Temperature Value 1024 2 43 10 1000 C Operating Range 5 to 60 C 4 4 8 GET_VN i Note OXAB OxCDisinterpretedasVerAB C D __ o Z Description 4 4 9 GET _XOVERA No Data Int16 S should report whether this value is positive negative or 4 4 10 GET DIGITAL FLT Value of digital indicators immediately prior to a power supply shutdown In the case of digital fault this monitor point contains the reading which precipitated the shutdown Only meaningful if primary status word bit 6 is set Description Suggested Interval oe a fault TE Related TE Related Aenea eats Digital fault indications Data ubyte 2 Sameas GET STATUS E e deg ubyte 0 Unused undefined s ALMA Project Doc ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 15 of 20 And Computing Control Software 4 4 11 GET OPIN FLT 0x0 00 34 0x1 80 34 Voltage of opti
9. 3 Interface Control Document Between Status Released Back End FOAD Module Page 8 of 20 And Computing Control Software 4 1 2 VALIDITY OF READINGS Many of the monitor points return values that are the result of ten bit analog to digital conversions At the end of the conversion cycle two bytes are moved from the ADC registers to the monitor points If a monitor transfer which is serviced under interrupt happened between the two transfers each byte read would be from a different conversion cycle To mitigate this the top bit of the MS byte is set to one before the move the move is done LS byte first and the bit is cleared at the end of the move If a transfer is interrupted the returned monitor point will have the top bit set As these monitor points are all int16 this would be interpreted as a large negative number Such an invalid reading is transient and the monitor point should be retried immediately The probability of an invalid reading is estimated at 1 in 10 000 for each point All points that can return an invalid reading are indicated in the description 4 1 3 NODE NUMBERS The 64 modules require the 32 nodes from 0x280 to Ox29F Assuming that the switch on the backplane is set to position S where S can take values from 0 to 15 and numbering the four units from 0 on the left to 3 on the right Units 0 and 1 are serviced by a single AMBSI at node number 0x280 2 S Units 2 and 3 are serviced by a single AMBSI at
10. 5 GND 3 5 0V 16 GND 4 5 0V 17 GND 5 Output Power Monitor 18 RS 232 OUT TTL Levels 6 Input Power Monitor 19 Loss of Input Power Alarm 7 EDFA Temperature Alarm 20 Output Power Mute Input 8 Loss of Output Power Alarm 21 Amplifier Disable Input 9 Pumps Bias Alarm 22 RS 232 IN TTL Levels 10 Pumps Temperature Alarm 23 N C 11 N C 24 5 0V 12 5 0V 25 GND 13 GND Nortel Networks Optical Components Ltd Brixham Road Paignton Devon TQ4 7BE United Kingdom Tel 44 1803 662106 Fax 44 1803 662801 Email opticalcomponents nortelnetworks com www nortelnetworks com hpocs IMooo2 ISSUE 3 November 2000 All data in this document is subject to change in accordance with Nortel Networks Corporation policy of continual product improvement No data in this document is intended to be used in connection with any contract except as may be first confirmed in writing by Nortel Networks Corporation The publication of information in this document does not imply freedom from patent or other rights of Nortel Networks Corporation or others 2001 Nortel Networks All rights reserved Nortel Networks Nortel Networks Logo the Globemark and Unified Networks are trademarks of Nortel Networks All rights reserved Information in this document is subject to change without notice Nortel Networks assumes no responsibility for errors that might appear in this document Printed in England NORTEL NETWORKS MGM MultiWavelength Gain Mod
11. Atacama Large Millimeter Array ATACAMA LARGE MILLIMETER ARRAY Interface Control Document Between Back End FOAD Module And Computing Control Software ALMA 54 05 00 00 70 35 30 00 A ICD Version A Status Released 2006 01 23 Prepared By Organization ate Dave Brown JBO 5006 01 23 Ralph Marson NRAO IPT Leader Approvals Organization Per Fabio Biancat Marchet SAA Reason Signed on behalf of Fabio B Z re Marchet Approved 2006 05 05 Date 2006 05 05 08 56 29 04 00 d Digitally signed by Clinton Jan Clint Janes Clinton Janes z E anes C US 2006 Gees 49 06 00 Brian Glendenning e N CN SC C 7 Reason Signe ehalf of Eric angole 2006 05 1 Date Ee 04 00 Configuration Control Board Approval Rick Murowinski Pud Digitally signed by mski ALMA Configuration Control DN CN mski C CA O ALMA OU JAO Board Secretary Date 2006 06 07 12 34 09 04 00 signing for the Control Board JAO Director Release Authorization Bes Je Massimo Terenghi A ArayaforM Joint ALMA Office UE Tarenghi Project Director 2006 07 14 14 11 23 04 00 ALMA Project Doc ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 2 of 20 And Computing Control Software Change Record Version Affected Change Reason nitiation Remarks Section s Request A 2006 ALL In
12. arm Outputs E 8 51 61 EN ENZ e ee K erT EDFA Temperature 7 This alarm is activated if the case a temperature is gt 60 C or lt 5 C e Loss of Output Power 8 This alarm is derived from an optical tap and 0 5dB PIN diode and is activated if the output power Figure 1 Suggested RS232 interface circuit falls below a user specified value The factory default value is set at 2dB from output power Alternatively the Nortel Networks MGM EDFA interface board may be used The interface set paimt board provides logic level conversion between the MGM EDFA serial data input output PUMP Ela 9 ana SEENEN SE SE pins TTL E s and a PC serial port RS 232 Levels Pump Temperature Pa This alarm is activated if any of the pump gt C Any terminal emulator program may be used We recommend Microsoft Terminal submount temperatures are higher or lower than the set temperature by greater than 5 C Port Confi gurati on Loss of Input Power 19 This alarm is derived from an optical tap and 0 3dB The PC serial port settings should be configured as shown in Table 5 PIN diode and is activated if the input power falls below a user specified value The factory Table 5 PC serial port configuration default value is set at 6dB below the minimum operating point Bits second 9600 Data Bits 8 Parity None Stop Bits 1 Flow Control None MGM EDFA User Commands All MGM Amplifiers are set up at the factory to operate as specified on the appropriate data sheet The foll
13. cal input power immediately prior to a power supply shutdown If the input is at fault this monitor point contains the reading which precipitated the shutdown Only meaningful if primary status word bit 6 is set Suggested Interval After a fault TE Related Data int16 Same as GET OPIN_ POW 4 4 12 GET OPOUT FLT 0x0 00 36 0x1 80 36 Voltage of optical output power immediately prior to a power supply shutdown If the output is at fault this monitor point contains the reading which precipitated the shutdown Only meaningful if primary status word bit 6 is set Suggested Interval After a fault TE Related pee te Same as GET _OPOUT POWER 4 4 13 GET VOLT FLT 0x0 00 38 0x1 80 38 Voltage of EDFA power supply voltage immediately prior to a power supply shutdown If the voltage is at fault this monitor point contains the reading which precipitated the shutdown Only meaningful if primary status word bit 6 is set Description Description Description Suggested Interval After a fault TE Related pare aie Same as GET PSU_VOLT Operating Range ALMA Project Doc ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 16 of 20 And Computing Control Software 4 4 14 GET AMP FLT 0x0 00 3A 0x1 80 3A Current from EDFA power supply voltage immediately prior to a power supply shutdown If the current is at fault this monitor point c
14. carries two AMBSI2 modules each Supervising two modules power supplies and CAN bus connectors The DWDM is an entirely passive device that requires no supervision The EDFA is a more complicated device supervised by a microcontroller PIC16F877A that communicates via a SPI interface and one of the AMBSIs with the AMB There are three ways of communicating with the EDFA e Simple commands can be sent to and status received from direct I O pins on the EDFA e More complex commands are sent to and received from an RS232 protocol serial port Because of the great disparity between the speed of the SPI interface 4MHz and of the serial link 9 6KHz the commands and replies are buffered in the PIC e Finally several analog measurements are digitized in the PIC and made available to the AMB The controller communicates monitor and control data to an AMBSI2 located on the backplane using a Serial Peripheral Interface SPI The interface will be configured to work with a variable size monitor data length in an address space of 256 bytes In practice only about 20 points are meaningful and of these only three may be written to The microprocessor can be reset by power cycling the module or by the signal RESET from the AMBSI This signal will become active in response to the AMB accessing the monitor point at relative CAN address 0x31001 The EDFA is controlled and monitored by a PIC 16F877 microcontroller that is interfaced to the
15. defined 1 These faults are not monitored while the EDFA is initializing 2 A brown out occurs if the PIC supply voltage falls below 4volts for a period exceeding 100uS 3 A watch dog time out implies a firmware fault ALMA Project Doc ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 12 of 20 And Computing Control Software Data ubyte 2 _ When hi the EDFA output is disabled _ When lo the EDFA output is enabled Bits 2 7 1 Unused undefined Alarm bits 1 and 4 will cause a power supply shutdown See 4 4 1 and 4 4 10 Alarm bit 2 urgently requires operator intervention The alarms and controls are explained in detail in the EDFA manual see appendix 1 4 4 3 GET _OPIN_ POW 0x0 00 24 0x1 80 24 Measured optical input power level to the EDFA Values are produced using a 10 bit analog to digital converter Description therefore valid readings will always be between 0 and 1023 An invalid result can be returned see Validity of Readings Power Value 1024 2 43 2 40 W Data int16 The reading should also be available in decibels reference level 1mW OdB Operating Range TBD ALMA Project Doc H ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 13 of 20 And Computing Control Software 4 4 4 GET OPOUT POWER Measured optical outp
16. ers within square brackets in the Amplifier Commands section refer to the amplifier stage being considered For single amplifier designs all components are in the second stage Command Set Password protected comments are identified by a P in the command title and by a X in the Pass column in Table 6 Command set summary Password protected commands are those which affect the operation of the amplifier e g changing the gain or laser drive current The password is factory set to 1234 it can be altered using the CR command Establishing Communications The following dialogue assumes communications have not been established and that there is only one EDFA connected to the PC serial port AD FFFF 1234 Address any connected unit password optional FFFF is the universal address to which any connected EDFA will respond The EDFA should respond with XXXX gt Where XXXX is the hexadecimal EDFA address Any of the commands shown in Table 6 may now be issued MGM EDFA Instruction Manual If the correct password is not sent password protected commands will not be recognised and the EDFA will respond with 22 XXXX gt Addressing Multiple EDFAs When 2 or more EDFAs are connected via a single serial port each EDFA will need a different address using the Change address command see CA in Address amp Password Commands Address amp Password Commands The following list of commands and syntax examples assum
17. es the unit address is 0001 and password is 1234 AD lt Unit Add gt Password Address Unit AD 1 1234 Instructs unit with address 1 to become active and respond to protected commands All modules are set to address 1 as the default 1234 is the default password and allows use of commands which alter the EDFA operating mode AD FFFF Instructs any connected unit to respond This command may be used if the address of a particular EDFA is unknown Reply is 0001 gt AD lt Unit Add gt Password Address Unit Quietly AD 1 1234 Same as the AD command but unit does not echo characters Reply is 0001 gt CA lt Serial No gt lt Add gt Change Address CA 12345678 0005 Change address of unit with serial number 12345678 to 0005 Reply is OK 0005 gt CP Old New New Change Password P CP 1234 ABCD ABCD Change the unit password from 1234 to ABCD Password is a Hex value from 00071 to FFFE Reply is OK 0001 gt Alarm Commands IPW 1 2 D lt value gt Input Power Warning Meteor only Provides low input power warning alarm without disabling the amplifier Operates in conjunction with LO alarm Reply is OK 0001 gt IPW 1 2 Input Power Warning Meteor only Reports the IPW level or if it is disabled Reply is Disabled 0001 gt Or in the form 20 dBm 0001 gt LO 1 2 D lt value gt Sets or disables Loss Of Signal LOS input power alarm for the relevant stage P Will disable ampl
18. gns all components are in stage 2 Sets amplifier stage 2 to constant gain of 23 dB Sets amplifier stage 2 to constant output power of 14 dBm Reply is OK 0001 gt Set Amplifier Reports the operating condition for the relevant amplifier stage Reply is Stage 2 Mode 0 G D Req 20 0 dBm dB 0001 gt The O or G indicate constant output power or gain mode If the letter D is present at least one of the lasers assigned to the stage is in constant drive current mode Version Inquiry Asks for the version identification of the firmware currently loaded into program EEPROM and the version of the downloader software in EPROM Reply is Downloader V1 00 Micro V1 00 DSP V1 00 Serial No AM12345 6 Gain Block No AB45678 9 Pump Commands FL 1 2 3 LP 1 2 3 LP 1 LS 1 2 3 LS 1 LT 1 2 3 LT 1 MD 1 2 3 lt N lt value gt gt Fit Laser Replies 1 2 or N Y or N for Meteor depending on which stage it is fitted to or whether it is absent For single amplifier designs all components are in stage 2 Reply is 1 2 N 0001 gt Laser Power Reports laser drive current and output power for laser 1 Reply is P1 123 4 mA 78 9 mW 0001 gt Signifying the drive current for laser 1 is 123 4mA and the output power is 78 9MW Laser Status Reports status of laser 1 DISABLED laser is disabled TLAS laser s cooler temperature is out of limits IDRV laser drive c
19. greater than one the command will execute and the extra bytes will be thrown away 4 5 3 SET EDFA RCA 0x0 00 C1 0x1 80 C1 Set the EDFA output power Suggested Interval No TE Related _ Turn the EDFA power off _ Turn the EDFA power on and disable the output Data ubyte 1 _ Turn the EDFA power on and mute the output to 7dBm oO _ Turn the EDFA power on with output a full power _ Ignored The success of writing to this control point can be verified by reading from GET STATUS P amp GET STATUS E If the length written to this control point is greater than one the command will execute using data from the first byte received and the extra bytes will be thrown away ALMA Project ALMA 54 05 00 00 70 35 30 00 A ICD 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 19 of 20 And Computing Control Software 5 THE SERIAL PORT 5 1 PROTOCOL Communication with the serial port of the EDFA is achieved by sending a text string to which the EDFA replies with another text string This is intended for connection to a serial port on a computer and operates at the low speed of 9600 baud In order to interface to the much faster SPI a 64 byte data buffer is used An internal register the buffer pointer is used to address the data buffer To send a command to the port e Ensure that the buffer is ready by reading the top nibble of GET STATUS SG e Reset the address pointer by issuing t
20. he appropriate command RESET_SDATA e Send the string to SET SDATA This auto increments the buffer pointer Terminate the string by sending a null character character 0 e Wait until GET STATUS_S shows that the reply from the EDFA is complete or that the transfer has timed out or failed The buffer pointer will be set back to zero at the end of a successful transfer e Read the null terminated string from GET SDATA the buffer pointer auto increments e Reset GET STATUS_S and the address pointer by sending the appropriate command The EDFA takes up to two seconds to reply If a reply is not received within about three seconds GET _STATUS_S will show a timeout This could be caused by a faulty or unoowered EDFA an incorrectly terminated command or by improperly established communications After power is applied to the EDFA the make active command string must be sent to establish communications Note that it is essential to use the quiet version of the command ADQ 1 rather than the standard version AD 1 The buffer for transmission is 64 bytes and wraps around The buffer for reception is 128 bytes and also wraps around 5 2 EDFA COMMANDS The command structure is detailed in the EDFA user manual section Appendix 1 Most of the commands are only used for setting up the EDFA While this would generally be done on the bench it might occasionally be necessary to make adjustments in the field so the serial port canno
21. ifier when enabled in constant power mode only Reply is OK 0001 gt LO 1 2 Reports LOS value for the relevant stage Reply is Disabled 0001 gt or in the form 20 dBm 0001 gt Amplifier Commands AP Amplifier Power Reports input and output power levels Reply is in the form I P 31 2 dBm O P 10 dBm 0001 gt AS Amplifier Status Request Reports any problems with either of the amplifiers DISABLED amplifier s output power is disabled SW disable CMOS input is active PWR amplifier cannot achieve its set output condition MUTE MUTE CMOS input is active LOS input power alarm is active IPW input power warning is active Meteor only EH SA 1 2 0 G lt Value gt SA 2 G 23 SA 2 O 14 SA 1 2 MGM EDFA Instruction Manual TINT unit s internal temperature is out of limits OK the amplifier has no alarm warnings Reply is STATUS DISABLED SW PWR MUTE LOS TINT IPW OK 0001 gt Erbium heater Meteor only Reports whether an erbium heater is fitted or not Reply is FITTED Heater is fitted NOT FITTED Heater is not fitted 0001 gt Internal temperature Reports the internal temperature of the unit Reply is Tint 30 6 C 0001 gt Set Amplifier P Sets the operating condition for the relevant amplifier stage O defines output power control Value field is power in dBm G defines gain control Value field is gain in dB For single amplifier desi
22. itial Draft 01 23 ALMA Project Doc ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 3 of 20 And Computing Control Software TABLE OF CONTENTS ge ch LEE 4 i a WW PORRO EEN 4 Vs2 SCORE EEN 4 2 RELATED DOCUMENTS AND DRAWINGS 4 2 1 APPLICABLE DOCUMENTS annannnnannnnnnnnnnnnnnnnnnrnnrnrnnrnrnnrnnnnrrrrnrnrrninrrnrnnrnnrnrrnrnrnnnn 4 2 2 ABBREVIATIONS AND ACHRONYMS 4 3 PHYSICAL SYSTEM INTERFACES 20 0 0 cece cece ccceeceeceeccecceeceeceeceeceecueceeeuseneeneeaeenes 5 3 1 MECHANICAL IN TEREACE et EES 5 3 2 ELECTRICAL POWER INTERFACE a asnananonnnsnnnnnnnerurnrnnnnnnrnrnnrnrnnnnrnrnrnrnnrnrnrrrrnrnrnnrs 5 3 3 ELECTRONIC ge 5 4 SOFTWARE CONTROL FUNCTION INTERFACE 6 AM OVERVIEW EE 6 4 2 SUMMARY OF MONITOR bROINTg 9 4 3 SUMMARY OF CONTROL ROINTg 10 4 4 MONITOR POINTS IN DETAIL 11 4 5 CONTROL POINTS IN DETAIL 18 5 THE SERIAL PORT 19 51 PROTOCOL ee 19 5 2 EDFA COMMANDS E 19 6 GAFEIWINTEREACE 20 L INO E 20 ALMA Project ALMA 54 05 00 00 70 35 30 00 A ICD 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 4 of 20 And Computing Control Software 1 DESCRIPTION 1 1 PURPOSE The purpose of this document is to define the Monitor and Control interface between the supervisory microprocessor in the FOAD module and the Computing Monitor and Control software 1 2 SCOPE The docu
23. l occupy one 6 unit high bin Each module plugs into a 3 unit high backplane in the lower half of the bin Two AMBSI boards are mounted on the backplane The backplane also carries a 48 V to 5 V DC DC converter which supplies power to the two AMBSI2s and to the microcontrollers in the four modules A 16 way switch on the backplane is used to set the bin number Two DB9 connectors one male one female for the CAN trunk connections are mounted on the crate 3 2 ELECTRICAL POWER INTERFACE The modules are powered by the 48 V rack supply 3 3 ELECTRONIC INTERFACE Two AMBSI2 boards as described in AD 04 will be used to connect to four modules Each AMBSI2 connects to two modules one via the primary SPI port the other by the secondary SPI port The bin number set by a switch and the location in the bin determine the node address for each AMBSI2 see 4 1 3 3 3 1 LIST OF CONNECTORS DB 9 male CAN trunk in DB 9 female CAN trunk out Phoenix 2 5 2 G 5 08 48 volt power supply 3 3 2 INTERCONNECTION DATA See AD 05 ALMA Project ALMA 54 05 00 00 70 35 30 00 A ICD 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 6 of 20 And Computing Control Software 4 SOFTWARE CONTROL FUNCTION INTERFACE 4 1 OVERVIEW Each module contains an erbium doped fiber amplifier EDFA a dense wave division multiplexer DWDM and a controller circuit board Four of these modules plug into a backplane that
24. ment contains lists of monitor and control points available in the controller and their suggested access rates It also contains instructions on how to use these points to access the serial port of the EDFA 2 RELATED DOCUMENTS AND DRAWINGS 2 1 APPLICABLE DOCUMENTS AD 01 ALMA 75 35 00 00 002 A STD ex ALMA US Computing Memo 7 ALMA Monitor and Control Bus Interface Specifications Version C 2001 September 07 AD 02 ALMA Software Glossary Draft Version 2003 05 21 AD 03 ALMA 75 35 00 00 001 A STD ex ALMA08002 0006 Generic Monitor and Control Points Draft 2000 November 01 AD 04 ALMA 70 35 10 02 001 A MAN ALMA Computing memo 12 ALMA Monitor amp Control Bus AMBSI2 Standard Interface Design Description 2001 May 03 AD 05 ALMA FOAD Module Hardware Description BEND 54 05 00 00 001 DWG AD 06 ALMA FOAD Module Block Diagram BEND 54 05 00 00 003 A DWG 2 2 ABBREVIATIONS AND ACRONYMS Analog digital converter ALMA monitor and control bus AMBSI AMB standard interface Controller Area Network DWDM Dense wave division multiplexer EDFA Erbium doped fiber amplifier serial peripheral interface see also AD 02 ALMA 54 05 00 00 70 35 30 00 A ICD 2006 01 23 Status Released ALMA Project Interface Control Document Between Back End FOAD Module Page 5 of 20 And Computing Control Software 3 PHYSICAL SYSTEM INTERFACES 3 1 MECHANICAL INTERFACE Four FOAD modules wil
25. nt may be needed to acquire a complete null terminated string from the EDFA serial port See Section 5 The Serial Port Suggested Interval Debug Debug gt S TE Related Data ubyte 8 Each byte is an ASCII character Reading from the buffer is only permitted when GET_STATUS_S shows that there is a complete message in the buffer Reading at other times will return a length of zero DMC byte 0x0F and no data will be transferred ALMA Project Doc H ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 18 of 20 And Computing Control Software 4 5 CONTROL POINTS IN DETAIL 4 5 1 SEND SDATA 0x0 00 80 0x1 80 80 Write up to eight bytes to the serial port data buffer starting at the current value of the buffer pointer The buffer pointer is advanced by Description one after each byte Multiple writes may be needed to senda complete null terminated string to the EDFA serial port SeeThe Serial Port Suggested Interval TE Related 1 lt n lt 8 Writing to the buffer is only permitted when GET _STATUS_S shows that the buffer is ready to accept data Writing at other times is equivalent to writing to an unlisted RCA the buffer is unchanged 4 5 2 RESET SDATA a Set the serial port buffer point to zero and set the serial port status Description to ready Suggested Interval TE Related Data Int8 lf the length written to this control point is
26. ontains the reading which precipitated the shutdown Only meaningful if primary status word bit 6 is set Suggested Interval After a fault TE Related same as GET_PSU_AMP 4 4 15 GET TEMP FLT 0x0 00 3C 0x1 80 3C Heat sink temperature immediately prior to a power supply shutdown If the temperature is at fault this monitor point contains the reading which precipitated the shutdown Only meaningful if primary status word bit 6 is set Suggested Interval After a fault TE Related Same as GET _HS_TEMP 4 4 16 GET XOVERB 0x0 00 3E 0x1 80 3E The second crossover point for the pump Suggested Interval Description Description Same as GET _XOVERA Data int16 ALMA Project Doc ALMA 54 05 00 00 70 35 30 00 A ICD Date 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 17 of 20 And Computing Control Software 4 4 17 GET LRU RCA int8 4 Data int16 int8 2 A revision level of OxFF means that the non volatile memory in which serial number and revision level are stored has not been programmed or is faulty A revision level of 0x00 means that this is a prototype board which should not be in use on the array 4 4 18 GET SDATA 0x0 00 80 0x1 80 80 Read eight bytes from the serial port data buffer starting at the current value of the buffer pointer The buffer pointer is then Description advanced by eight at the end of the transfer Multiple reads from this poi
27. owing commands can be used to interrogate the unit to find the various drive and monitoring conditions They also allow the user to change the configuration of the amplifier In these cases it must be appreciated that the amplifier may not operate as specified once these changes are made By reverting to the factory configuration the amplifier will return to its original operating conditions Command Structure The following section details the commands sent to the EDFA and the replies that would be received All commands must be terminated by CR LF set in the terminal properties menu A prompt of the address of the unit is shown when a particular EDFA is ready to receive a command e g 00019 A syntax error in command entry will give a reply of 22 Note that when an EDFA is powered up it will be inactive i e it will not respond to any commands received until it receives its own address command At this time it will then become active and reply to all subsequent commands When a different address command is used to communicate with another unit the first EDFA will become inactive Note that the terms active and inactive refer only to the communications operation and do not affect the optical function of the amplifier In the following command listing the characters shown inside pointed brackets lt gt are mandatory Where characters are shown in square brackets following a command a choice of the listed options may be included Numb
28. rts LOS value for stage LP Fro X Reads laser drive current amp power LS baal X Reports the status for each laser LT baal X Reports the temperature for each laser MD haal lt N lt value gt gt X X Sets drive current for each laser or returns control to Set Amplifier requirements MD haal X Reads set drive current for laser or reports which stage laser is fitted to SA 1 2 O G lt Value gt X X Sets the operating condition for each amplifier SA 1 2 X Reports the operating condition for each amplifier ST baal min set max X X Sets the set temperature for each laser vee pee ST 1 2 3 X Reports the set temperature for each laser V X Reports the version information ee Table 7 Mechanical Dimensions Parameter Specification Limits Min ee Module Length 150 Module Width 125 Module Height 20 3 Optical Pigtail Length 950 1000 1050
29. t be confined to the maintenance mode ALMA Project ALMA 54 05 00 00 70 35 30 00 A ICD 2006 01 23 Interface Control Document Between Status Released Back End FOAD Module Page 20 of 20 And Computing Control Software lf the EDFA pump bias alarm see 4 4 2 is active this indicates that the EDFA is reaching the end of its service life and the operator should be notified lt would be useful to perform the Version Inquiry command at startup and make this information available SAFETY INTERFACE There are no laser safety issues opening the module is not possible without removing it from the rack Doing so disconnects the power supply and renders the unit safe The module should not be removed from the rack while power is applied to the EDFA In maintenance mode it is possible to change or override safety mechanisms which could lead to faulty operation or equipment damage It should not be possible for the board to be in this mode when it is installed on the antenna but if due to a gross fault the board is found at startup to be in maintenance mode the EDFA power must not be applied and the operator must be notified It is important that no two bins are set to the same number This will not cause any damage but will cause the CAN bus to ignore one of the two bins APPENDIX 1 On following pages Table 8 Connector Pin Out The pinout for the male DB25 connector PIN Function PIN Function 1 5 0V 14 GND 2 5 0V 1
30. trol system which will include appropriate power supplies serial communications alarm monitoring and thermal control The integral control system monitors input and or output optical powers and the status of the components within the optical amplifier module This information is used to adjust the control parameters to maintain the required amplifier performance Analogue and digital electrical connections allow external control of the module continuous monitoring of its performance and provide TTL logic levels associated with specified faults for system performance alarms MGM EDFA Instruction Manual Electrical Connections All electrical connectivity is achieved through the 25 way D type plug connector Power supply requirement is a single 5 V supply to 6 pins as defined in Table 1 Table 1 Electrical Pin Connections Pin Number Description ee 5 0V 13 14 15 16 17 25 GND 5 Output Power Monitor 6 Input Power Monitor 7 EDFA Temperature Alarm 8 Loss of Output Power Alarm 9 Pumps Bias Alarm 10 Pumps Temperature Alarm 11 23 N C 18 RS 232 OUT TTL Levels 19 Loss of Input Power Alarm 20 Output Power Mute Input 21 Amplifier Disable Input 22 RS 232 IN TTL Levels Power Requirements Table 2 Electrical Power Requirements Parameter Minimum Positive Supply Voltage 4 75V 5 0V 5 25V Power Dissipation Start of Life Preamp 2 5W Dual Pump Line 5W Triple Pump Line 7W Power Dissipation End of
31. ule Configuration Manual NORTEL NETWORKS MGM EDFA Instruction Manual Contents List of Figures Eeer 3 EEr TE 3 Introduction oc ccccccssssssusssusssusssusssusssusesusesusssusssssstssstssstnestnsstesetesstnsstesssnssseseseete 4 Beete E A Re dl ele E A Electrical Connections 5 Wattgen sescca a a EE e O ES 5 Bis ue TR ee 1 EE 6 POPC OPE SUVA e e E N ETE E EE 6 Serial Communications Port 10irnnnnnnnnnnnnnnnnnnnnnnnnninnnnn 7 Pott COMMU LIOU E 7 MGM EDFA User Commands 8 Command e E 8 EIERE ebe 8 Establishing COMM CEM ee 8 Addressing Multiple EDFAS EE 9 Address amp Password Commands sssssssssssssssoonsssssoonsssosnssssssnonnsssnosnsssnsonssnnronnnnnnonnnnnnonnuunnonnsnnnonnnunroennsnrrennns 9 PAW COIN ANS ee 10 Amplifier Commands een 10 aa ES ag Ee D 12 Mechanical ec cc cc 15 List of Figures Brei Ce RS232 E UG sssrini ssnin ienasi eniai ES 7 Figure 2 Device BH ago 9 1 e E 15 All data in this document is subject to List of Tables change in accordance with Nortel Networks Table 1 Electrical Pin Connections seeren 5 Corporation policy of continual product E E T E Table 2 Electrical Power Requirements u 5 intended to be used in connection with any Table 3 Digital ue E 6 contract except as may be first confirmed in Table 4 Alarm Outputs 6 woa bro ER SE EE The publication of information in this Table 5 PC Serial Port COnfiQuration ooo ccccccssecsstessesssessseesseen 7
32. urrent is above its end of life value NOT FITTED specified laser is not fitted DRV 8 laser is in constant forward current mode OK no alarms Reply is LS 1 DISABLED TLAS IDRV NOT FITTED DRV OK 0001 gt Laser Temperature Requests temperature of laser 1 Reply is T1 20 5 7OOMA 0001 gt Signifying that the submount temperature of laser 1 is 20 5 C and the thermoelectric cooler drive current is 7oomA Mode Drive P Sets the drive current for each laser or specifies whether the laser drive current is defined by the Set Amplifier command i e in constant output or constant gain mode The Mode Drive command overrides the drive requirements of the set amplifier command SA for the selected pump MD 1 80 MD 1 N MD 1 2 3 ST 1 2 3 min set max ST 1 20 25 30 ST 1 2 3 ST 1 MGM EDFA Instruction Manual Set laser 1 to 80 mA forward current Set laser 1 control according to set amplifier SA requirement Reply is OK 0001 gt Mode Drive Reports set drive current for laser or whether drive current is under SA control Reply is one of the following three forms NOT FITTED Laser not present in amp 123 4 MA Constant drive mode set to 123 4 mA LASER 1 STAGE 1 Not in constant drive mode operating as part of stage 1 under SA control Set Temperature P Sets the thermal conditions for each laser Sets the minimum submount temperature to 20
33. ut power level from the EDFA Values are produced using a 10 bit analog to digital converter Description therefore valid readings will always be between 0 and 1023 An invalid result can be returned see Validity of Readings This reading is not meaningful when the EDFA PSU is shut down Suggested Interval Same as TE Related GET ODIN POW Power Value 1024 2 43 99 6 1000 mW Data int16 The reading should also be available in decibels reference level 1mW OdB en 4 4 5 GET PSU VOLT Measured value of the EDFA supply voltage Values are produced using a 10 bit analog to digital converter Description therefore valid readings will always be between 0 and 1023 An invalid result can be returned see Validity of Readings This reading is not meaningful when the EDFA PSU is shut down Suggested Interval Same as TE Related GET OPIN_ POW Data int16 Voltage Value 1024 2 43 0 4 V Operating Range 4 75 to 5 25 V 4 4 6 GET PSU AMP Measured value of the EDFA supply current Values are produced using a 10 bit analog to digital converter Description therefore valid readings will always be between 0 and 1023 An invalid result can be returned see Validity of Readings This reading is not meaningful when the EDFA PSU is shut down Suggested Interval Same as TE Related GET ODIN POW Data int16 Current Value 1024 2 43 0 5 Operating Range 0 to 5 Amps ALMA Project Doc ALMA 54 05 00 00 7
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ALMA 54.05.00.00 70.35.30.00 A ICD