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VXI SM8000 SM8101 / SM8102 - OPTICAL ATTENUATORS, SM8101 / SM8102 SPECIFICATIONS, 0 - 10 dB

Models: SM8000

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SM8101 / SM8102 - OPTICAL ATTENUATORS

VXI Technology, Inc.

SM8101 / SM8102 - OPTICAL ATTENUATORS

The SM8101 and SM8102 are single-slot VXIbus modules. The SM8101 is a single-channel variable attenuator, and the SM8102 is a two-channel variable attenuator.

SM8101 / SM8102 SPECIFICATIONS

ATTENUATOR

ATTENUATION RANGE2	0 – 10 dB	11 – 30 dB	31 – 60 dB
Resolution	0.10 dB	0.12 dB	0.15 dB
Repeatability	±0.05 dB	±0.10 dB	±0.10 dB
Absolute Accuracy	±0.10 dB	±0.20 dB	±0.25 dB
PDL3	0.08 dB	0.10 dB	0.30 dB

INSERTION LOSS

0.6 dB typical, 1.5 dB maximum

BACK REFLECTION

-50 dB maximum

TURNING SPEED

50 ms minimum, 1400 ms maximum

DAMAGE THRESHOLD

24 dBm maximum

OPERATING TEMPERATURE

0°C – 50°C

STORAGE TEMPERATURE

-20°C – 70°C

HUMIDITY

40°C / 90% Relative Humidity / 5 days

Notes

1All specifications referenced without connectors.

2Maximum attenuation for multi-mode components is 40 dB.

3Measured at 1550 nm, single-mode only.

20	SM8000 Series Introduction

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VXI SM8000 SM8101 / SM8102 - OPTICAL ATTENUATORS, SM8101 / SM8102 SPECIFICATIONS, 0 - 10 dB, 11 - 30 dB, 31 - 60 dB

Contents

VXI Technology, Inc P/N Released February 132031 Main Street Irvine, CA 949 OPTICAL SWITCH USER’S MANUALVXI Technology, Inc TABLE OF CONTENTS SECTIONSECTION SECTIONCommand Set Uncalibrated Operation - Move-To-Absolute-StepWrite Example Read ExampleVXI Technology, Inc SM8000 Series PrefaceWARRANTY LIMITATION OF WARRANTYCERTIFICATION RESTRICTED RIGHTS LEGENDOptical Switch D E C L A R A T I O N O F C O N F O R M I T YVXI Technology, Inc 2031 Main StreetVXI Technology, Inc SM8000 Series PrefaceGENERAL SAFETY INSTRUCTIONS TERMS AND SYMBOLSUse Proper Power Cord Use Proper Power SourceWARNINGS CONT Avoid Electric ShockGround the Product Operating ConditionsSUPPORT RESOURCES VXI Technology World HeadquartersVXI Technology Cleveland Instrument Division VXI Technology Lake Stevens Instrument DivisionVXI Technology, Inc SM8000 Series PrefaceOVERVIEW SECTIONINTRODUCTION SM8000 SERIES - OPTICAL SWITCH CONTROLLER SM8001 / SM8002 - MULTI-CHANNEL SWITCHES ConfigurationsFIGURE 1-2 SM8001 / 8002 SWITCHES 1 x NDuplex 1 x N 2 x N BlockingSM8001 / SM8002 MULTI SWITCH SPECIFICATIONS 1 All specifications referenced without connectors780 - 1650 nm 0.6 dB typical, 1.2 dB maximumSM8003 - PRISM SWITCHES SPSTSPDT Transfer - PositionSM8003 PRISM SWITCH SPECIFICATIONS 2 Repeatability for 100 cycles at constant temperature780 - 1570 nm 0.6 dB typical, 1.1 dB maximumSM8101 / SM8102 SPECIFICATIONS ResolutionSM8101 / SM8102 - OPTICAL ATTENUATORS 0 - 10 dBCALCULATING SYSTEM POWER AND COOLING REQUIREMENTS SETTING THE CHASSIS BACKPLANE JUMPERSPREPARATION FOR USE INTRODUCTIONSETTING THE LOGICAL ADDRESS switch to 1 and the front switch toBACK FRONTswitch to C and the front switch to Divide byConvert to MSB and LSB SELECTING THE EXTENDED MEMORY SPACEService should only be performed by qualified personnel OPTICAL CONNECTIONSCleaning Optical Connectors Mating Optical ConnectorsSECTION OPERATIONGENERAL DESCRIPTION SM8003 - Prism Switches FIGURE 3-2 SM8003 PRISM SWITCHESSPST SPDTFIGURE 3-3 ATTENUATOR DIAGRAM SM8101 / SM8102 - Optical AttenuatorsOPERATION SM8001 / SM8002 - Multi-Channel SwitchesResetting the Switch Relay Registers - Output Channel Selection1 x N Switch Configuration RESETFIGURE 3-4 1 X N SWITCH CONFIGURATION TABLE 3-1 CONTROL CODES FOR 1XN CONFIGURATIONTABLE 3-2 CONTROL CODES FOR DUPLEX 1 X N CONFIGURATION Duplex 1 x N Switch ConfigurationFIGURE 3-5 DUPLEX 1 X N SWITCH CONFIGURATION TABLE 3-3 CONTROL CODES FOR 2 X N BLOCKING CONFIGURATION 2 x N Blocking Switch ConfigurationFIGURE 3-6 2 X N BLOCKING SWITCH CONFIGURATION TABLE 3-4 CONTROL CODES FOR 2 X N NON-BLOCKING CONFIGURATION 2 x N Non-Blocking Switch ConfigurationFIGURE 3-7 2 X N NON-BLOCKING SWITCH CONFIGURATION Calculating Switching Time FIGURE 3-8 MULTI-SWITCH TIMINGSM8003 - Prism Switches SM8101 / SM8102 - Optical AttenuatorsStarting the Device Control ModesUncalibrated Operation - Move-To-Absolute-Step Calibrated OperationStep 1 - Power Up and Initialize Step 2 - Query Default ParametersStep 3 - Actuate the Device BUSY SignalREGISTER ACCESS PROGRAMMINGADDRESSING thenTABLE 4-1 SMIP II REGISTER MAP - A16 OFFSETWRITE FUNCTION READ FUNCTIONSMIP II REGISTERS - A16 ID Register - Read OnlyLogical Address Register - Write Only Device Type Register - Read OnlyControl Register - Write Only Offset Register - Read and WriteSerial Number High Register - Read Only Serial Number Low Register - Read OnlyInterrupt Status Register - Read Only Interrupt Control Register - Read and WriteSubclass Register - Read Only ADDRNVM Access Register - Read NVM Access Register - WriteBoard X, Y Used Address Register - Read and Write Trace RAM Start High Register - Read and WriteTrace RAM End High Register - Read and Write Trace RAM End Low Register - Read and WriteTrace RAM Address HIGH Register - Read and Write Trace RAM Address LOW Register - Read and WriteOpen Trigger Select Register - Write Only TTL Trigger Polarity Register - Write OnlyADDR ADDRTrace RAM Control Register - Read and Write Busy Trigger Control Register - Read and WriteADDR ADDRTrigger Advance Register - Write Only Board Busy Register - Read OnlyReserved Registers - Read and Write ADDRFIGURE 4-1 SM8000 SERIES - A24/A32 ADDRESS SPACE VXI Configuration Space1M Memory Allocated to Store Module Settings 1M Memory Allocated for Configuration Relay RegistersSee Typical Optical Multi Switch Operation Control Register - Read and WriteSee Typical Optical Multi Switch Operation See Typical Optical Multi Switch OperationControl Register cont ADDR Delay Register - Read and WriteControl Register cont Status Register - Read Only ADDRCommand Register - Write Only ADDRAddress Register - Write Only ADDRDEVICE MEMORY RELAY REGISTER OFFSETADDR Relay Register 00 - Read and WriteWRITING TO THE RELAY REGISTERS Relay Optical Module’s Data Attenuation Level Register 02 thru 08 - Read and WriteRegister 0A thru 0C - Read Relay Optical Module’s Data Attenuation LevelTYPICAL OPTICAL MULTI-SWITCH CONTROL EXAMPLE PROGRAMMING EXAMPLESRead TYPICAL OPTICAL ATTENUATOR CONTROL EXAMPLEWrite To operate the modules correctly, the SM8000 must be loaded with a valid Address in the Address Register. The SM8000 is hard coded at the factory with the optical modules default address of 73 = 49h, and may be used to generate the address used in the command. This is the address of all attenuators as shipped from the factory. During the programming of the optical module, the programmer may wish to omit sending the module’s address over the VXI Bus, letting the SM8000 generate the default address that is used in the command string. This could possibly increase throughput, by decreasing VXI Bus traffic, if the modules are receiving many commands, although this is only true if the optical module’s address is not changed by the user. If the address is to be changed, IT IS IMPERATIVE THAT THE NEW ADDRESS BE WRITTEN DOWN. Failure to do so will result in an inability to control the module. All four possible modules may have the same address. The SM8000 controls them on separate internal busses COMMAND REGISTER BitsCOMMAND SET TABLE 4-2 ATTENUATOR COMMAND SETConvert decimal step number to hexadecimal Convert to HIGHBYTE and LOWBYTE formatHIGHBYTE and LOWBYTE value to hexadecimal valuePage Multiply dB value by 100 to get integer decimal Convert integer decimal to hexadecimalConvert to HIGHBYTE and LOWBYTE formatConvert hexadecimal value to an integer decimal valueDivide by 100 to convert to dB value HIGHBYTE and LOWBYTE value todecimal value for wavelength nm HIGHBYTE and LOWBYTE value tohexadecimal value Convert hexadecimal value to an integerConvert to calibration temperature Convert the HIGHBYTE to get the monthConvert the MIDBYTE to get the day Convert the LOWBYTE and add 1900 to getConvert the HIGHBYTE into the major revision numberConvert the LOWBYTE into the minor revision Put the major and minor numbers together toMultiply by 100 to convert decimal attenuation value to an integerCovert integer to hexadecimal Concatenate HIGHBYTE and LOWBYTEhard coded at the factory with the optical modules default used in the command. This is the address of all attenuators asthe default address that is used in the command string. This traffic, if the modules are receiving many commands. AlthoughPage VXI Technology, Inc SM8000 Series ProgrammingINDEX VXIbus