User Manual - TTC Upgrade
Contents
1. PH ESS Document No 9 of 13 2 3 3 3 POWER MONITORING REGISTERS Name Offset Size Access CH1_POWER 0x0004 16 bits 8bits used R CH2_POWER 0x0006 16 bits 8bits used R The data contained in this registers are obtained by the digitalisation of the signal generated by the optical modules The purpose of these registers is to evaluate and supervise the evolution of the lasers power emissions and indicate if the laser or photodiode are transmitting or receiving any signal At the same time the result of the comparison between the threshold value and the power register is displayed in the front panel In order to set up the threshold values the user can be guided by the table 2 3 3 3b or with the equations described in the next section Default Threshold Value Meaning 0x50 4 dBm 0x20 6 5dBm Table 2 3 3 3b Default Threshold Values WARNING INVISIBLE LASER THIS OPTICAL POWER CAN DAMAGE YOUR EYES DO NOT LOOK DIRECTLY THROUGH THE FIBERS WHEN THE LASER IS ON OR USE APPROPRIATE EYE GLASSES PH ESS Document No 10 of 13 2 3 3 4 UNDERSTANDING THE POWER MONITOR In order to understand and set up the default threshold values the next measures have been done and these function obtained in approximation to the read values Acg in Monitor Pin Meaning 0x95 7dBm 0 034mw Unit Measured 0x1C Dark 0x2B 1 3 dBm 1 4mW Ox5F 7dBm 5mW Table 22. 3 3 1 H W Environment 3 3 2 S W Environment 3 4 Test programs 3 5 The user library PH ESS Document No 3 of 13 1 INTRODUCTION The RF_TX_A and RF_RX_A RF to Optical and Optical to RF VMEbus cards are interface cards developed as two channels analog Optical Link This link supports transmissions from 30 KHz to 3GHz in Analog or digital with a link gain of 5dB and with very low noise This document contains a hardware description of the boards and all the accessible registers of RF TX A and RF RX A cards as well as a description of the generic S W that has been developed for monitoring these cards PH ESS Document No 4 of 13 2 RF RX AND RF TX ANALOG HARDWARE 2 1 POWER DESCRIPTION This board requires a VME crate with the standard VME64 power supply with 12 12 and 5 Volts available The nominal consumption for these lines Voltage Current A Fuse Current 5V 120mA Not fused 12V 350mA 370mA Not fused 12V 70mA 9mA Not fused Table 2 1 Power consumption In order to check the power supplied to the board a four LEDs have been installed to indicate the presence of 12V 12V 5V and 3 3V PH ESS Document No 5 of 13 2 2 OPTICAL INTERFACES The Optical interface is composed of 2 equal blocks based on two laser photodiodes modules These modules are compact modules without any control pin That means that the optical to electrical conversion is achieve even if the VME i
3. 3 3 3a Power Monitor Measurements P Tx w Pwread 0 034mW unit P Rx w Pwread 0x1C 0 082mW unit 2 3 3 5 BOARD IDENTIFICATION Offset Access BOARD ID 0x003A The card ID is just a register that can be used for identify the board This register is situated in offset 0X0034A Its normal value is 366 and 367 decimal for RX and TX Respectively and they correspond to the ESS board numbers PH ESS Document No 11 of 13 2 4 BOARD CONFIGURATION JUMPERS AND SWITCH RX AND TX Element Description LSB rotary switch See Table x MSB rotary switch See Table x Reset Front Panel Generate a Soft reset of the FPGA when is pressed push button ST5 Always ON ST4 Always OFF ST1 Frequency selectorO for the JTAG ST2 Frequency selector for the JTAG ST3 If ST3 is ON gt the FPGA will be reprogrammed when the VME crate reset will be activated SysReset Table 2 4 Jumpers and Switch descriptions 2 5 FIBRE CABLE CONNECTIONS TX Connector name To be connected to Format CH1 out Optical Link RF Analog RX Optical As RF input signal Inverted CH1 RF In 50omhs source Analog or Digital CH2 Out Optical Link RF Analog RX Optical As RF input signal Inverted CH2 RF In 50omhs source Analog or Digital J4 JTAG JTAG MODE FPGA J3 JTAG BIT BLASTER MODE EEPROM Table 2 5 Connectors and Descriptions in Tx 2 6 FIBRE C
4. ABLE CONNECTIONS RX Connector name CH1 In Optical Link To be connected to RF Analog TX PH ESS Document No PH ESS Format Optical CH1 RF Out 50omhs load Same format as Optical CH2 In Optical Link RF Digital TX Optical CH2 RF Out 50omhs load Same format as Optical JTAG JTAG MODE FPGA JTAG BIT BLASTER MODE EEPROM 2 7 FRONT PANEL LEDs RX AND TX LED Description VME COMM Indicates if the last communication was successful or wrong Table 2 6 Connectors and Descriptions in Rx CH1 LED Green Indicates Power Transmitted Received gt Threshold CH2 LED Green Indicates Power Transmitted Received gt Threshold Table 2 7 Front Panel LEDS REFERENCES OR MORE INFORMATION Lasers and Photodiodes evaluation by Angel Monera RF_TX_A EDA documents https edms cern ch nav eda 01331 RF RX A EDA documents https edms cern ch nav eda 01332 Miteq Evaluation by S Baron and A Monera Laser and Photodiodes Evaluation by S Baron and A Monera PH ESS Document No PH ESS TTC COMMON SOFTWARE 3 3 INTRODUCTION 3 3 1 H W ENVIRONMENT 3 3 2 S W ENVIRONMENT 3 4 TEST PROGRAMS 3 5 THEUSER LIBRARY
5. USER MANUAL Function RF Optical Link Class VME ANALOG PH ma ae Created 11 10 2006 Page 1 of 13 PH ESS 02 01 Modified date Rev No 1 RF TX A amp RF RX A v1 0 Double Analog Optical Link VMEbus Interface Card and S W Summary This document describes the functionality of the RF Tx Analog and RF RX Analog card as well as the generic S W that has been developed for it Prepared by Checked by Approved by Markus Joos PH ESS for information Tel Fax E Mails you can contact Markus Joos 41 22 7672364 41 22 7671025 markus joos cern ch Angel Monera 41 22 7678925 41 22 7678925 amoneram cern ch 1 2 3 PH ESS Document No PH ESS Table of Contents Introduction RF RX And RF TX Analog Hardware 2 1 Power description 2 2 Optical Interfaces 2 2 1 Link Characteristics 2 3 VMEbus interface 2 3 1 Addr module sellection 2 32 2 3 3 2 3 3 1 2 3 3 2 2 3 3 3 2 3 3 4 2 3 3 5 Software Vme addres map Registers Description EDA Identification Reference Power threshold Power monitoring registers Understanding The Power Monitor Board Identification 2 4 Board configuration Jumpers and switch RX and TX 2 5 Fibre cable connections Tx 2 6 Fibre cable connections Rx 2 7 Front panel LEDs Rx and Tx 2 8 References or more information TTC common software 3 3 Introduction
6. nterface is not set up MODULE FUNTION MITEQ LBT 10K3G 13 23 P3 Laser Module MITEQ LBT 10K3G 15 23 10 Photodiode Module Table 2 2 Modules and references Each TX channel admits analog or digital input through a coaxial SMA connector and offers an Optical output through an E2000 APC connector for fast and accurate connection The TX and RX modules are in a metal receptacle with the only pins of Power and Monitor outputs that will help to know the intensity of the Laser or the signal received by the photodiode 2 2 1 LINK CHARACTERISTICS The link is ready for single mode Fibre in 1330nm Link Gain 5 dB maximum Attenuation supported 12dB Analog Input Output Bandwidth 30KHz to 3Ghz Requires Heat sink with a proper airflow in order to avoid the destruction the components Laser Power 7dBm Receiver minimum sensibility 8dBm WARNING the modules need or Heat sink or a constant airflow of at least 2m s 2 3 PH ESS Document No 6 of 13 VMEBUS INTERFACE The VMEbus interface of the RF_Analog cards is implemented in its FPGA and based on a VHDL Module developed by the AB RF group This Module has been developed especially for VME64 but adapted for using some functionality of VME64X like automatic addressing The firmware installed has been configured to work in the addressing mode of A24 D16 and works as a memory decoder where all the memory space is available The access modes dictated b
7. xFO 0000 Board space 0xF00000 to OxF3 FFFF Automatic address Module address Depends on the slot into which the card is plugged Manual address Module address OxF4 0000 Board space 0xF40000 to OxF7 FFFF Table2 3 1 b Examples of Module Addr PH ESS Document No 8 of 13 2 3 2 SOFTWARE VME ADDRES MAP Offset Size bytes Function Remarks 0x0000 EDA ID Read 0x1331 and 0x1332 0x0002 pore ME Read Write 16 bits only 8 used 0x0004 2 CH1 POWER Read 16 bits only 8 used 0x0006 2 CH2 POWER Read 16 bits only 8 used 0x003A BOARD ID CERN ID Read 0x016E RX OxO16F TX gt Others Unused Table 2 3 2 VME Memory Map 2 3 3 REGISTERS DESCRIPTION 2 3 3 1 EDA IDENTIFICATION 0x0000 16 bits The card ID is just a register that can be used to identify the board this default value is 0x1331 for the RF_Tx_A board and 0x1332 for the RF_RX board which correspond the EDA projects numbers 2 3 3 2 REFERENCE POWER THRESHOLD Size Access Def Rx Def Tx 16 bits REF POWER COMPARATOR 0x0004 8bits used 0x0050 0x0020 The reference Power threshold is a register used as reference to be compared with the power that the laser is transmitting or the power arriving to the receiver The result of the comparison is indicated in the front panel with a LED Green light indicates power emitted received Power threshold Red light indicates the opposite
8. y address modifier are only available for 0x39 and 0x3D where the there is no distinction between privilege user and normal user From this 24bits of memory address 6 bits are used for the module address A23 to A18 This address can be set up using the two rotary switches Picture 2 3 Module address selector In addition it is possible to fix automatically the module address by using the geographical address of VME64x In order to select the source of the module address rotary switches or GEO addr from the 8 bits of the R S the 2 lower bits are designated to select it PH ESS Document No 7 of 13 2 3 1 ADDR MODULE SELLECTION Address space available Note M represent XXXX any combination of 4 bits N represent XX any combination of 2 bits OxM N 0 0000 to OxM N 3 FFFF gt 256 Kbytes of memory Rotary Switch Rotary Module address MA 1 Switch 2 M Bits 3 2 N Automatic GEO Address 5bits 0 Bits 1 0 1 to A23 A19 lt GEOGA 4 0 A18 lt 0 Bits 3 2 N OxMN Manual Address Bits 1 0 0 A23 A20 lt M A19 A18 lt N Requires VME64X crate Table 2 3 1 Address and ADDR Mode selection In others words the bottom rotary switch sw1 controls the addressing mode with the lower two bits which switches to automatic mode if the bit 0 or bit 1 1 Examples Rotary Switch 1 Rotary Switch 2 Module MODO ADDRESS SPACE OxF 0 Manual address Module address O
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