User Manual PDF File
Contents
1. Hardware Configuration Once the VM32PAFF VMEbus board has been removed from its anti static bag and carefully inspected for damage you are ready to configure the board s base address for your particular system Communication to all amplifier filter modules is done through three registers whose Base Address can be set throughout all of A16 space A VM32PAFF board occupies a 64 byte block in A16 address space and may be configured on any 64 byte boundary The user will need to set a Base Address that is appropiate for the VME system in which the VM32PAFF will be installed The Base Address is the only hardware configuration on the VM32PAFF board The factory set Base Address is 2000 hex Before attempting to use the board the user should set verify the base address using the address jumper JP1 on the board CAUTION The VM32PAFF Board is sensitive to STATIC ELECTRICITY Use proper GROUNDING TECHNIQUES when handling the board To reconfigure the VM32PAFF Base Address lay the board flat as shown in Figure 4 1 The ten position jumper block shown in Figure 4 1 is used to set the board s base address in A16 address space The ten jumper positions correspond to address lines A15 through A06 Jumper position 06 corresponds to address line A06 jumper position 07 corresponds to A07 etc An installed jumper sets a logic 1 while a missing jumper sets a logic 0 For example to set the VM32PAFF Base Adresss to 800 hex install a jumper on position2. that is from BOO up to B04 One bit of this register is also used as a flag to indicate that the serial interface is busy and new data cannot be accepted until this bit is cleared This BUSY interlock bit is located at the MSB of CHADR or B15 The Data Register or DATA located at Base Address 2 holds the binary representation of a specific channel gain Only the four lowest LSB s of DATA are used Writing data to these bits when BUSY is clear sets the gain of the channel pointed to by CHADR When a readback of a channel s gain setting is requested by setting BUSY the current channel gain setting appears in DATA once BUSY clears The lowest gain setting 12dB is set by writing a 0 x to DATA and the highest gain setting 60dB is set by writing a C x to DATA Table 5 1 shows DATA gain settings cen on Hes a Value Value 7 6 02 1 1 _ 0j 0 00 2 60 3 S3 4 daoa 4 4 8 a 5 5 16 4240 6 6 64 13433612 8 8 128 4214 9 9 512 345419 11 B Table 5 1 DATA register gain settings The Reset Register or RESET located at Base Address 4 allows the user to set all channels on the board simultaneously to their minimum gain setting This is useful for system initialization and in auto ranging applications Writing anything to RESET transfers all zero data to all of the channels simultaneously The data written is irrelevant Readback requests on this location return rando
3. typ 1 0 max Q f 20nV 4Hz 1 kHz G 1000 83 dB 1 kHz single ended 86 dB 1 kHz differential 0 25X to 1024X in factors of 2 1 before filtering 32 chls programmed over VMEbus with read back 0 1 dB max A16 D16 DO8 EO Slave Three active R W registers in 64 byte blocks 5V 1 0A max 12 0 7A max each 09C to 70 C 25 C to 85 C 0 95 non condensing VMEbus 6U single slot 9 17 x 6 3 inches 233 x 160 mm 32 Differential DC coupled 32 Single Ended DC coupled Two groups of 16 Optional Input Male high density 78 pin D sub Quantity 1 Output Female high density 44 pin D sub Quantity 2 1 Ibs 454 grams kg 4 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Description With Fixed Frequency Filter 3 Description The VM32PAFFE is a single width B size GU VME model that consists of a motherboard and up to 32 daughter modules The motherboard contains the VMEbus interface and input and output connections Each daughter module is made up of two boards a high precision programmable gain amplifier board and a 3 pole filter buffer amplifier combination board VME Bus Interface and Input Output Connections The VM32PAFF appears on the VMEbus as a Revision C 1 compliant A16 D16 slave The VMEbus backp
4. 22 Hi 25 Channel 06 Lo 34 Channel 22 Lo 26 Channel 07 Hi 13 Channel 23 Hi 5 Channel 07 Lo 14 Channel 23 Lo 6 Channel 08 Hi 73 Channel 24 Hi 65 Channel 08 Lo 74 Channel 24 Lo 66 Channel 09 Hi 54 Channel 25 Hi 46 Channel 09 Lo 55 Channel 25 Lo 47 Channel 10 Hi 35 Channel 26 Hi 27 Channel 10 Lo 36 Channel 26 Lo 28 Channel 11 Hi 15 Channel 27 Hi 7 Channel 11 Lo 16 Channel 27 Lo 8 Channel 12 Hi 75 Channel 28 Hi 67 Channel 12 Lo 76 Channel 28 Lo 68 Channel 13Hi 56 Channel 29Hi 48 Channel 13 Lo 57 Channel 29 Lo 49 Channel 14 Hi 37 Channel 30 Hi 29 Channel 14 Lo 38 Channel 30 Lo 30 Channel 15 Hi 17 Channel 31 Hi 9 Channel 15 Lo 18 Channel 31 Lo 10 Table 4 1 Analog Input Connections Refer to Figure 4 2 for connector orientation The mating connector is a male high density 78 pin D sub Frequency Devices recommends that input signals be wired using cable consisting of individually shielded twisted pairs of 22 AWG stranded wire 13 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 8176 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC 32 Channel VME Module Hardware Preparation i Programmable Amplifier With Fixed Frequency Filter The Analog Outputs are carried on two 44 pin male D shell connectors located in the center and near the top of the front panel Analog Output connections are as follows Refer to Figure 4 2 for connector o
5. 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC dn 32 Channel VME Module Programmable Amplifier Specifications With Fixed Frequency Filter 2 Specifications Analog Input 1 Input Impedance 2 Maximum Input 3 AC Couple Optional Analog Output 4 Impedance 5 Linear Operating Range 6 Channel to Channel Crosstalk 7 Maximum Current 8 Offset Voltage 9 Offset Temp Coeff RTI Filter Characteristics 10 Anti alias filtering 11 Cut off Frequency f 3dB 12 Amplitude Match 13 Phase Match 14 Noise Voltage RTI 15 Distortion PGAS G 1X 2 Vgygs Output Rp 2kQ Gain 16 Gain Programmimg G 17 Gain Accuracy DC VMEbus 18 Interface 19 Registers Power Supply 20 From VME Backplane Environmental 2 Operating 22 Storage 23 Humidity Mechanical 24 Card Size 25 No of Input Channels 26 No of Output Channels 27 Differential Output 28 Mating Connectors 29 Weight Any two channels set to same gain and loading 25 C and Rated Power Input 1 MQ 22 pF 15V Fixed frequency 10Hz 1Q typ 10 max 5V pk Output clamped to 9 V lt 100 dB 1 0 kHz lt 90 dB 20 kHz 5 0 mA 2mV RTI NTE 40mV max 5 100 G n V C max 3 pole low pass Butterworth or Bessel fixed frequency Fixed frequency from 100 Hz to 100 kHz 0 1dB DC linear to 0 25dB at f 0 2
6. With Fixed Frequency Filter 16 o o 00000000000 0 o OO000000000000 0 o O O 00000000000 0 17 32 OUTPUT VMEbus VM32PAFF Figure 4 2 VM32PAFF Front Panel The analog input connector is a female 78 pin D shell connector The analog output connectors are two male 44 pin D shell connectors 12 CD 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 8176 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC 32 Channel VME Module Hardware Preparation i Programmable Amplifier With Fixed Frequency Filter Connector Cable Information and I O Connections The Analog Input connector is a 78 pin female D shell connector located near the bottom of the front panel Analog Input connections are as follows Input Connector J3 Input Connector J3 Cont d Function 78 Pin Female D shell Function 78 Pin Female D shell Channel 00 Hi 69 Channel 16 Hi 61 Channel 00 Lo 70 Channel 16 Lo 62 Channel 01 Hi 50 Channel 17 Hi 42 Channel 01 Lo 5 Channel 17 Lo 43 Channel 02 Hi 31 Channel 18 Hi 23 Channel 02 Lo 32 Channel 18 Lo 24 Channel 03 Hi 11 Channel 19 Hi 3 Channel 03 Lo 12 Channel 19 Lo 4 Channel 04 Hi 71 Channel 20 Hi 63 Channel 04 Lo T2 Channel 20 Lo 64 Channel 05 Hi 52 Channel 21 Hi 44 Channel 05 Lo 53 Channel 21 Lo 45 Channel 06 Hi 33 Channel
7. is required because of accident neglect misuse power failure transportation or other causes other than ordinary use FDI s responsibility under the above warranty shall be limited to the repair or replacement at FDI s option free of charge to the purchaser of any component which fails during the one year period provided that the purchaser has promptly reported such failure to FDI in writing and FDI has upon inspection found such components to be defective The purchaser must obtain shipping instructions for the return of any item under this warranty provision and compliance with such instructions shall be a condition of this waranty EXCEPT FOR EXPRESS WARRANTIES STATED ABOVE FDI DISCLAIMS ALL WARRANTIES WITH REGARD TO THE PRODUCTS SOLD HEREUNDER INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS Limitation of Liability Expressed warranties stated herein are in lieu of all obligations or liabilities on the part of FDI for damages including but not limited to consequential damages arising out of or in connection with the use or performance of the product 20 G U E ERR 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Am
8. 11 which corresponds to A11 After the board s base address has been configured the VM32PAFF is ready for installation in a VME system 9 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com DEVICES INC 32 Channel VME Module Programmable Amplifier Hardware Preparation With Fixed Frequency Filter RNI RN2 C13 Figure 4 1 VM32PAFF Base Address Configuration Jumpers An installed jumper sets a logic 1 while a missing jumper sets a logic O 10 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 8176 e mail sales freqdev com e Web Address http www freqdev com W SS FREQUENCY Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Hardware Preparation With Fixed Frequency Filter Board Installation Frequency Devices VM32PAFF conforms mechanically in every respect to the single width VME B size 6U form factor Installation of a VM32PAFF board into a standard VME mainframe can proceed exactly as for any other standard single width B size 6U VME board CAUTION The VM32PAFF Board is sensitive to STATIC ELECTRICITY Use proper GROUNDING TECHNIQUES when hand
9. 19 FAN Urdu NETTO M MR 20 UTA UO OW SVU NEY ERR 20 OIA Ce m 21 Figures Figure 3 1 VM32PAFF Simplified Functional Block Diagram cccccccesseececeeeeeeeeeeeesaeeeeseeeeeseaeeesaeeeeesaess 6 Figure 9 2 aand DA daughter miedule useisuubutan uEuuEen aeud aout CAE e EEE IRE Punt Ee UM EUM d GM EE 7 Figure 4 1 VM32PAFF Base Address Configuration Jumpers eese 10 Figure 4 2 VM32PAFF Front Panel cccccseccceseeceeeeeseeeeseeeeceecesseeesaecessueesesesseeeesaeeeseueessaeessaeeesseneessaees 12 Figure 5 1 VM32PAFF VMEbus Memory Map esssessseeeneeenn nennen nnnm nennen nnn nnne nnns nnne nns 15 Tables Table dT Analog Input COMMCC OMS s uesementatentet cti entum etu bos ai iaa deine a 13 Table 4 2 Analog Output Connections uusateniostas cius uu Seul totu U comiti esu ou lbunc usu Paca usurum dup n cem o P coss Enc a M uud 14 Table 5st DATA register gain SUNOS esset iUt news ut aS ur obs nip EI a RU mu cR M tus DIESE ME Lain qURUMMIE FuR RUN EOS 16 2 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Introduction With Fixed Frequency Filter 1 Introduction The VM32PAFF VMEbus family of amplifier filter boards from Frequency Devices Inc offer up to thirty two channels of software programm
10. 2 DEVICES INC D a a i 2 7 Programmable Amplifier 32 Channel VME Module With Fixed Frequency Filter USER S MANUAL MES p i iuop i 122322121 E M n i ML i ar E EETSLELIT EARS 3 EE LI Jd I 3E I E a Eam Mr a T E eG 1 d i U k TD i Z xi _ _ s Se er LIES LL er Lap E d r Y 07 F s F 1 i es I f ha pa ax mi uium ns PETI ra 3 ra g ET je E j a B anes I WE P Mi TITIT a onmi E X bi f nw th idi 44 daa JH as e TIME DUM F Hei a a mm 17 y s E uu m L H 3 T7 Muscle hy L J UR ES T Tin PI dataa a aaa A a a aaia a 4am a a The information is based on data and our best knowledge and we consider the information to be true and accurate Please read all We hope the information given here will be helpful We assume no responsibility for the use of these statements recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us statements recommendations or suggestions nor do we intend them as a recommendation for any use which would infringe any patent or copyright 1 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 8176 e mail sales freqdev com e Web Address http www fr
11. ADR waiting for BUSY to clear Once BUSY is found clear the user writes the desired channel address to CHADR making sure to write a 1 to the BUSY bit The serial interface accesses gain data from the selected channel and clears the BUSY bit in CHADR when the requested data is available in DATA The requested data is available in DATA approximately 4 microseconds after writing to CHADR Please note when a flag can be controlled by two or more systems instructions that generate read modify write cycles or read followed by write cycles should be avoided while testing the state of the BUSY bit The safest way to test BUSY is to read CHADR into a local register and then test the state of the BUSY bit in the registered copy In addition to VM32PAFF register map Figure 5 1 also defines the read write function of each bit Notice that registers may be accessed as words or as bytes Programming Considerations There are some considerations that the user must take into account for when trying to program the VM32PAFF e Attempting to access the VM32PAFF board in other than A16 address space will cause a bus timeout e Attempting long word access or unaligned transfers will cause the board to respond to the bus cycle with a bus error BERR e Changing the channel address while BUSY is set results in erroneous data during a data read operation and will corrupt the settings of two or more channels during a data write operation e VM32PAFF hardware prev
12. able differential input amplifiers combined with precision 3 pole fixed frequency Butterworth or Bessel linear analog filters on each channel The boards are available in a single width B size GU VME form factor and fully conform to VME Revision C 1 as an A16 D16 Slave VM32PAFF s provide simultaneous access to DC coupled wideband signals The boards receive up to thirty two differential signal inputs through two shielded front panel connectors and provide signal buffering software programmable gain from 12dB to 60dB in 6dB steps and fixed frequency 3 pole low pass filtering for each channel The boards may be configured with Butterworth or Bessel filters with cutoff frequencies from 100 Hz to 100 kHz Available options include AC coupled input and or differential output Features Benefits e Simultaneous access over 32 channels offers a low cost versatile and convenient way to provide amplification and filtering e Interchannel crosstalk lt 90 dB provides precision per formance solutions to design engineers system inte grators and OEM s e Q pole Butterworth or Bessel transfer functions with a broad range of corner frequencies are offered to meet a wide range of applications e High channel count density without sacrificing performance maximizes chassis utilization 3 ynnnn wn 4Aa Un 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252
13. ace The motherboard provides simultaneous access to up to 32 Differential DC coupled wideband input signals It offers up to 32 Single Ended DC coupled output channels in four groups of eight Available options include AC coupled input channels and or Differential output channels 5 N 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Description Channel Address Register A16 D16 FREQUENCY DEVICES INC 32 Channel VME Module other channels 31 other channels A A Slave VMEbus I F Serial Data Interface and Formatter Model VM32PAFF Programmable Amplifier With Fixed Frequency Filter Channel Channel Out Programmable Amplifier and Filter Module 10f32 8 bit Shift Reg Serial Dout from 31 other channels CIkto 31 other channels Figure 3 1 VM32PAFF Simplified Functional Block Diagram Programmable Gain Amplifiers One out of 32 posible channels is shown The programmable gain amplifiers PGA are located on daughter modules see Figure 3 2 There is one PGA for each channel up to a maximum of 32 channels per VM32PAFF The input to the gain amplifier is a precision instrumentation amplifier that provides a high impedance differential input wi
14. andling the board 19 N MG M D 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com W SS FREQUENCY Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Warranty Information With Fixed Frequency Filter T Warranty Information Unless otherwise specified in writing by FDI all FDI products sold hereunder are warranted against defects in workmanship and material under normal use and service for a period of one 1 year from the date of shipment except that where applicable liability for defective components purchased by FDI and are resold to the purchaser hereunder shall conform and be limited to the obligations prescribed by the original manafacturer s warranties applicable to such components All warranties hereunder are contingent upon proper use in the application for which the product was intended and do not cover products which have been modified or repaired without FDI approval or which have been subjected to neglect accident improper installation or application or on which the original identification marks have been removed or altered These warranties will not apply if adjustment repair or parts replacement
15. ential pair This results in a linear operation range of 5V T CD 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 8176 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF SSeS FREQUENCY DEVICES INC 32 Channel VME Module Programmable Amplifier Hardware Preparation With Fixed Frequency Filter 4 Hardware Preparation Unpacking and Inspection Before unpacking the VM32PAFF shipping container carefully inspect the exterior of the package for evidence of damage After noting areas of possible shipping damage open and unpack the shipping container being careful to preserve the container and packing materials in case they are needed later CAUTION The VM32PAFF Board is sensitive to STATIC ELECTRICITY Use proper GROUNDING TECHNIQUES when handling the board Carefully remove the VM32PAFF board from its anti static bag and visually inspect for evidence of damage If the board appears to be damaged in any way notify the shipping carrier immediately 8 ynnnn wn 4Aa Un 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF FREQUENCY 2 5 DEVICES INC 32 Channel VME Module Programmable Amplifier Hardware Preparation With Fixed Frequency Filter
16. ents changing of the channel selection while BUSY e Writing to the Data Register or the Reset Register while BUSY is set is inhibited in hardware None of these events are flagged by the board so it is important to use the BUSY interlock before writing to any register 17 EGERERERNNUNNNNNMD 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com W EE FREQUENCY Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Programming With Fixed Frequency Filter e Reading the Data Register while BUSY is set will yield erroneous data but will not impair board operation or contaminate any channel settings This event is not flagged so it is important to use the BUSY interlock before reading the Data Register e It is not possible to write 0 to the BUSY bit from the VMEbus so this is not an error Attempting to write 1 to the BUSY bit when it is already set is also not an error condition and therefore is not flagged e Attempting to set a channel s gain beyond the normal gain range will cause the channel to automatically set to its maximum gain If the channel s gain setting is subsequently read back the proper code for maximum gain
17. eqdev com ee EREQUENCY Model VM32PAFF e DEVICES INC 32 Channel VME Module Programmable Amplifier Contents Figures and Tables With Fixed Frequency Filter Contents Tee AVON eie MERC T P n 3 FS USS BON M o aeneo ete es cs cease tse MINIM IIa DUM M MEME I et ems MEM RUN RUNE 3 PA ler CIM CONS ET TO DO E TEM 4 3 ISS CHIUOIT MET 5 VME Bus Interface and Input Output Connections ccc ceceeeeeeeeeeeeeeeeeeeeeeeeaeeeeeeeseaaeeesseeeeeesaneeeeeeas 5 Programmable Gain Amplifiers 0 0 0 ccccccccsseccccceeseceeeaeeceesaeeeceeeaeeeceeseeaeeeeseeueeeessaeeeeeseaaseessaeeeeeeesaages 7 PAU o ERE EET 7 UIDI FT US oii tuer tmn Si sA eit eect teen estu UMP M HUM pM Ret FPES RR SP DP PME LU i C CIE 7 S Mi THAN AN Ss mic ALU DERE OE T ODER 8 EIA AC inre and ISDS C HOM NN REO OT 8 Hardware Ol UT OWN RN RETE OE TOU 9 Board Installation PENNE T MR 11 I O Connections and the Front Panel ccccccsccccecceseeeeeceeeeeeceeeseeseeeeeeeseeeeseesseeeeeeeseaeeeesseeeeeeeeas 11 Connector Cable Information and I O Connections cccccceeececceeeeceeeseeeeeeseeeeceeseeeeeeeseeaeeeesaaeeees 13 Br dre sf MN WAG PTT r 15 miserere NT NOTUM 15 OCIA TO CS o MINER 17 FOC anM NMG COn derai E t Em 17 6 Troubleshooting and Technical Support ccccccccseecceceeeeeeeeeeeeeeeeeeeeeeeeseeeeeeseeaeeeesseaeeeeseeeeeessaeaaeeeesaaaes
18. icates bit always reads zero Binary representation of channel gain in 6dB steps Write data is ignored Writing data to these bits when BUSY is clear sets the gain of the channel pointed to by CH 4 0 When readback of a channel s gain setting is requested by setting BUSY along with CH 4 0 the current channel gain setting appears here once BUSY clears MSB LSB B15 B08 B07 B00 RESET Base 4 Read Write Word or Byte Any write to this location word or Y causes all channels to reset to the minimum gain using the BUSY interlock The data written is irrelevant Reading this location will return random data Immediately after a write to RESET completes BUSY 0 data read back in DATA for any channel will be 0x0000 Figure 5 1 VM32PAFF VMEbus Memory Map The memory map consists of three VMEbus 16 bit registers 15 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF AE FREQUENCY DEVICES INC 32 Channel VME Module Programmable Amplifier Programming With Fixed Frequency Filter The Channel Address Register or CHADR located at Base Address 0 holds the address of the daughter module being addressed The first amplifier channel Channel 0 has an address of 00 x and the last amplifier channel Channel 31 has an address of 1F x The channel addresses occupy the lowest five LSB s of CHADR
19. lane offers a software programmable interface to set the gain of each daughter module Through the interface a user can also read back individual channel gain settings This VM32PAFF read write or bi directional access to the individual amplifier modules is especially useful when building auto ranging systems and or fault tolerant systems Additionally it is good for diagnosing system failures for debugging newly developed systems and for constructing reliable test header files The motherboard uses an indexed channel addressing scheme and transfers gain data to from the selected channel over a simple serial channel Figure 3 1 is a simplified block diagram of the VM32PAFF showing one amplifier filter channel and all of the common functions The serial channel incorporates some features that are especially important when providing precision low noise signal conditioning When the board is not being accessed the normal case during a test the serial channel is entirely static When the board is accessed to set or read back a channel gain only the channel being accessed is clocked so the other channels on the board see no logic transitions that could inject noise or induce DC offsets The serial channel is slow compared to VMEbus transfer rates Rather than hold the VMEbus while gain data is serialized and transferred to the selected channel the VM32PAFF board uses a BUSY flag interlock while data transfer to from the selected channel is taking pl
20. ling the board The VM32PAFF board may be installed in any available mainframe slot except Slot 0 VMEbus Master The board does not use VMEbus interrupts or bus mastering capabilities but passes all VMEbus daisy chained signals automatically The major considerations in locating the VM32PAFF board in the mainframe are for EMI and I O signal cabling To minimize interference from other boards in the system it is good practice to keep one or more empty slots between analog signal conditioning boards and high speed digital boards in the system When cabling the system it is desirable to keep the analog signal cabling as short as possible and physically located away from high speed digital cabling and high voltage switching lines I O Connections and the Front Panel The following information is provided to assist the user integrator in installing and interconnecting a VM32PAFF board into a VME system Figure 4 2 shows the layout of the VM32PAFF front panel The following sections provide detailed information about connectors pinouts and cabling There are no front panel indicators or controls on the VM32PAFF 11 B 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Hardware Preparation
21. m data The reset function uses the BUSY interlock just as a normal write to DATA would 16 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Programming With Fixed Frequency Filter Programming Procedure To write gain data to a channel the user first reads the CHADR Base Address 0 and tests its BUSY bit to see if the serial interface is busy If BUSY is set the user can go on to other things and come back to the board later or the user can poll CHADR waiting for BUSY to clear Once BUSY is found clear the user writes the desired channel address to CHADR The user must also make sure to write 0 to the BUSY bit Once the desired channel has been selected the user then sets that channel s gain by writing the desired gain data to DATA Base Address 2 The VM32PAFF automatically sets the BUSY bit in the CHADR register to indicate that the serial bus is transferring data The BUSY bit is automatically cleared once the transfer is complete The serial channel will be busy for approximately 4 microseconds To read a channel s gain setting the user first tests the BUSY bit to see if the serial interface is busy by reading CHADR s BUSY bit If BUSY is set the user can go on to other things and come back to the board later or the user can poll CH
22. or Channels 16 31 J2 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 8176 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Programming With Fixed Frequency Filter ns 5 Programming Register Level Programming A register based read write programming interface makes the VM32PAFF family of VMEbus amplifier filter boards extremely easy to program All the programmable gain modules on the motherboard may be programmed through three 16 bit registers These are the Channel Address Register the Data Register and the Reset Register Figure 5 1 shows the VM32PAFF VMEbus memory map MSB LSB B15 B08 B07 BOO CHADR Base 0 Read Write Word or Byte 0 indicates bit always reads zero Binary address of channel selected for Write data is ignored data read or write operation 00000 Channel 0 v 00001 Channel 1 11110 Channel 30 BUSY interlock 11111 Channel 31 1 indicates on board serial channel is busy formatting and transferring data Automatically sets to 1 upon writing gain data to DATA and upon writing to RESET User writes 1 to initiate readback og gain setting for channel pointed to by CH 4 0 Automatically clears when transfer to from the selected channel is complete MSB LSB B15 B08 B07 BOO DATA Base 2 Read Write Word or Byte 0 ind
23. plifier Ordering Guide With Fixed Frequency Filter 8 Ordering Guide VM32PAFF Ordering Guide For flexibility in many applications the Frequency Devices VM32PAFF VMEbus Board may be ordered with 8 16 or 32 amplifier filter modules Figure 4 1 indicates the location of each channel Transfer Function Options B Butterworth A AC Coupled Input L Bessel D Differential Output L A VM32PAFF 16 PGAB5 75kHz D Channels 3dB Corner Frequency 8 16 or 32 e g 100Hz 75 kHz 100 kHz We hope the information given here will be helpful The information is based on data and our best knowledge and we consider the information to be true and accurate Please read all statements recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us We assume no responsibility for the use of these statements recommendations or suggestions nor do we intend them as a recommendation for any use which would infringe any patent or copyright 21 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com
24. rientation The mating connectors are female high density 44 pin D subs Frequency Devices recommends that output signals be wired using cable consisting of individually shielded Function 44 Pin Male D shell Function 44 Pin Male D shell Channel 00 Hi 33 Channel 16 Hi 33 Channel 00 Lo 32 Channel 16 Lo 32 Channel 01 Hi 19 Channel 17 Hi 19 Channel 01 Lo 18 Channel 17 Lo 18 Channel 02 Hi 4 Channel 18 Hi 4 Channel 02 Lo 3 Channel 18 Lo 3 Channel 03 Hi 35 Channel 19 Hi 35 Channel 03 Lo 34 Channel 19 Lo 34 Channel 04 Hi 21 Channel 20 Hi 21 Channel 04 Lo 20 Channel 20 Lo 20 Channel 05 Hi 6 Channel 21 Hi 6 Channel 05 Lo 5 Channel 21 Lo 5 Channel 06 Hi 37 Channel 22 Hi 37 Channel 06 Lo 36 Channel 22 Lo 36 Channel 07 Hi 23 Channel 23 Hi 23 Channel 07 Lo 22 Channel 23 Lo 22 Channel 08 Hi 8 Channel 24 Hi 8 Channel 08 Lo 7 Channel 24 Lo 7 Channel 09 Hi 39 Channel 25 Hi 39 Channel 09 Lo 38 Channel 25 Lo 38 Channel 10 Hi 25 Channel 26 Hi 25 Channel 10 Lo 24 Channel 26 Lo 24 Channel 11 Hi 10 Channel 27 Hi 10 Channel 11 Lo 9 Channel 27 Lo 9 Channel 12 Hi 41 Channel 28 Hi 41 Channel 12 Lo 40 Channel 28 Lo 40 Channel 13Hi 27 Channel 29Hi 27 Channel 13 Lo 26 Channel 29 Lo 26 Channel 14 Hi 12 Channel 30 Hi 12 Channel 14 Lo 11 Channel 30 Lo 11 Channel 15 Hi 43 Channel 31 Hi 43 Channel 15 Lo 42 Channel 31 Lo 42 Output Connector Channels 00 15 J1 Table 4 2 Analog Output Connections twisted pairs of 22 AWG stranded wire 14 Output Connect
25. th high common mode rejection capability The differential inputs for the channel are converted to a single ended signal before being applied to the gain amplifier where the signal is amplified or attenuated by the value programmed by the user The gain can be selected to vary between x0 25 12 04dB to x1024 60 21dB in steps of x2 6 02dB When power is first applied to the board the gain of each channel is arbitrary The user must program the board in order to established a given gain value 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 81 76 e mail sales freqdev com e Web Address http www freqdev com Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Description With Fixed Frequency Filter VMEBus Interface Output Amplifier 3 pole Low Pass Filter Differential Input PGA Figure 3 2 a and b A daughter module X represents the channel number of 1 up to 32 Anti Alias Filters Each channel provides a fixed frequency 3 pole Bessel or Butterworth linear analog low pass filter The corner frequency for each filter is user specified between 100 Hz and 100 kHz There is no bypass mode for the anti alias filter Output Amplifiers The output of each filter module is applied to the output amplifier This output stage converts the signal to a differential output with a low output impedance The output is clamped to 9V on each wire of the difer
26. will be returned 18 1784 Chessie Lane Ottawa IL 61350 e Tel 800 252 7074 815 434 7800 e FAX 815 434 8176 e mail sales freqdev com e Web Address http www freqdev com W SS FREQUENCY Model VM32PAFF DEVICES INC 32 Channel VME Module Programmable Amplifier Troubleshooting and Technical With Fixed Frequency Filter Inrformation 6 Troubleshooting and Technical Support If you have difficulty installing the VM32PAFF board or if the board fails to operate properly contact Frequency Devices for technical assistance Technical assistance is available weekdays 8 00 AM to 4 30 PM Central time at 815 434 7800 or 800 252 7074 Inquiries may also be faxed to 815 434 8176 or emailed to sales freqdev com If you need to contact Frequency Devices in writing our address is 1784 Chessie Lane Ottawa IL 61350 Attn Customer Service Please have the following information handy prior to contacting Frequency Devices for assistance Model Number and Serial Number Purchase Order Number Your Bill To and Ship To addresses If Frequency Devices determines the board must be returned to the factory you will be issued a Return Material Authorization RMA number Use this number on all shipping containers repair purchase orders and shipping documents DO NOT ATTEMPT TO RETURN BOARDS WITHOUT FIRST OBTAINING AN RMA NUMBER CAUTION The VM32PAFF Board is sensitive to STATIC ELECTRICITY Use proper GROUNDING TECHNIQUES when h
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