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4 – 4

Circuitry

4.2

Parts Lists

Part Reference

SRS P/N Value

Part Reference

SRS P/N Value

C101,C102,C103

5-00098 10µ T

R116,R124,R125

4-01465 270

C104

5-00381 330p

R117,R126,R127,R223, 4-01455 100

C105

5-00106 9.0--50p

R226,R229,R232,R238,

C106,C107,C108,C405 5-00387 1000p

R284-R287,R292

C201,C203

5-00319 10U/T35

R128,R246,R265,R288 4-01406 0

C202

5-00368 27P

R202,R204,R206,R208 4-01405 1.00M

C204-C215

5-00318 2.2U/T35

R209,R211

4-01259 30.1K

C217

5-00104 3.5-20P

R210,R212

4-01309 100K

C218

5-00363 10P

R222,R225,R228,R231, 4-01535 220K

C220

5-00313 1P

R267

C222-C223

5-00454 .01U

R233,R239

4-01419 3.3

C401-C404,X101-106,

5-00299 .1U

R234-R237

4-01675 100, 5%, 1/2W

X108-X114,X201-X224

R245

4-00617 100K

D101,D102,D402

3-00945 BAT54S

R249,R252,R255-R259 4-01487 2.2K

D103,D104,D205-D207 3-00649 BAW56LT1

R250,R251,R253,R254 4-01486 2.0K

D201-D204

3-00896 BAV99

R266

4-01541 390k

D301-D308

3-00424 GREEN

R268

4-00901 500K

D309-D313

3-00425 RED

R289,R290

4-01561 2.7M

D314-D317

3-00426 YELLOW

R401

4-01402 931K

D401

3-01384 MMBZ5232BLT1

R402,R405

4-00014 5K

J101

1-00367 15 Pin D

R403

4-01308 97.6K

J103

1-00302 Socket 0.100" 3x2

R404

4-01310 102K

J201-J206

1-00003 BNC

R406

4-01348 255K

JS201

1-01079 20 pin

R407

4-01526 91K

JS301

1-01080 20 Pin

R408

4-01517 39K

K201-K208

3-01492 ASX2204H

R415-R420

4-01524 75K

L101,L102,L103

6-00174 FR43 Bead

R425-R428

4-01499 6.8K

L201-L206

6-00640 ToroidChoke

R431

4-00925 10

Q101-Q116

3-01421 MMBT2222A

RN200,RN201

4-01649 1.000K

Q201-Q206

3-00580 MMBT3906LT1

RN301,RN302

4-00442 1.2K 1206 mini

QN201

3-01419 MBT3906DW1

S301-S304

2-00053 B3F-1052

R101,R118-119,R122,

4-01527 100k

U101

3-01379 68HC912B32

R123,R213-216,R240,

U102

3-00903 MAX6348 4.4V

R242-243,R260

U103

3-00742 74HC74

R102,R201,R203,R205, 4-01479 1.0k

U104

3-00662 74HC14

R207,R221,R224,R227,

U105

3-01405 74AC00

R230,R291,R423

U106

3-00663 74HC08

R103

4-01052 210

U107-U108

3-00746 74HC245

R104,R217-R220,R241, 4-01495 4.7k

U201-U204

3-01246 AD8610AR

R261

U205-U209

3-00728 LM393

R105,R295,R296,R298, 4-01511 22k

U210

3-01278 AD829AR

R299,R2101

U211

3-01247 BUF634F

R106,R262,R263

4-01431 10

U212

3-00998 OPA277UA

R107-R110,R115

4-01519 47K

U401

3-01415 LP2951CMM

R112,R113, R421,R422 4-01551 1.0M

U402

3-01248 LT1175CN8

R114,R120,R121,

4-01503 10K

U403

3-01279 MAX5258

R409-R414,R424

U404

3-01280 LTC2050CS5

U405

3-01367 DG419DY

SIM980

Analog Summing Amplifier

Содержание SIM980

Страница 1: ...Operation and Service Manual Analog Summing Amplifier SIM980 Stanford Research Systems Revision 1 9 August 28 2006...

Страница 2: ...returned to a Stanford Research Systems authorized service facility Contact Stanford Research Systems or an authorized representative before returning this product for repair Information in this docu...

Страница 3: ...ex of Common Commands 2 2 2 2 Alphabetic List of Commands 2 4 2 3 Introduction 2 6 2 4 Commands 2 6 2 5 Status Model 2 17 3 Performance Tests 3 1 3 1 Introduction 3 2 3 2 Tools and preparation 3 2 3 3...

Страница 4: ...ii Contents SIM980 Analog Summing Amplifier...

Страница 5: ...fier for combining multiple analog signals from DC to 1 MHz Service Do not install substitute parts or perform any unauthorized modifi cations to this instrument The SIM980 is a single wide module des...

Страница 6: ...d on SRS Products Symbol Description Alternating current Caution risk of electric shock Frame or chassis terminal Caution refer to accompanying documents Earth ground terminal Battery Fuse On supply O...

Страница 7: ...s manual are Front panel buttons are set as Button Adjust is shorthand for Adjust Adjust Front panel indicators are set as Overload Remote command names are set as IDN Literal text other than command...

Страница 8: ...r 5 min warm up Input range 10 V before overload Output range 10 V before overload Input slew rate 40 V s Total Harmonic Distortion 0 01 80 dB max 1 kHz Output slew rate 75 V s Operating temperature 0...

Страница 9: ...y with the SIM980 Summing Amplifier In This Chapter 1 1 Introduction to the Instrument 1 2 1 1 1 Overview 1 2 1 1 2 Power on State 1 2 1 2 Front Panel Operation 1 2 1 2 1 Inputs 1 3 1 2 2 Output 1 4 1...

Страница 10: ...inverting or non inverting operation or switched off Each input is 1 M and DC coupled and accepts signals between 10 V 1 1 2 Power on State The SIM980 stores its operation state input channel configur...

Страница 11: ...an simply left un connected as the Johnson noise of the open 1 M input resistor will dominate the output noise of the SIM980 1 2 1 3 Offset autocalibration The SIM980 uses an active input offset corre...

Страница 12: ...es details on the interface The SIM980 has no internal protection against reverse polarity missing CAUTION supply or overvoltage on the power supply pins Misapplication of power may cause circuit dama...

Страница 13: ...by directly connecting the appropriate interface lines from the SIM980 DB 15 plug to the RS 232 serial port of a personal computer 1 Connect RXD from the SIM980 directly to RD on the PC TXD directly t...

Страница 14: ...F 3 7 RTS 4 8 CTS 10 3 TxD 11 2 RxD 5 Computer Ground to P S 7 15 VDC 13 5 VDC 14 15 VDC 8 9 Ground P S return current 1 Signal Ground separate wire to Ground Table 1 2 SIM980 Direct Interface Cable...

Страница 15: ...mples 2 8 2 4 4 Amplifier Commands 2 9 2 4 5 Autocalibration Commands 2 10 2 4 6 Serial Communication Commands 2 11 2 4 7 Status Commands 2 11 2 4 8 Interface Commands 2 13 2 5 Status Model 2 17 2 5 1...

Страница 16: ...bration OFST i j 2 10 Offset Value Serial Communications FLOW z 2 11 Flow Control PARI z 2 11 Parity Status STB i 2 11 Status Byte SRE i j 2 11 Service Request Enable CLS 2 12 Clear Status ESR i 2 12...

Страница 17: ...2 1 Index of Common Commands 2 3 LBTN 2 15 Button TOKN z 2 15 Token Mode TERM z 2 16 Response Termination SIM980 Analog Summing Amplifier...

Страница 18: ...libration ARMC z 2 10 Arm Autocalibration C CESE i j 2 12 Comm Error Status Enable CESR i 2 12 Comm Error Status CHAN i j 2 9 Channel Control CONS z 2 14 Console Mode F FLOW z 2 11 Flow Control L LBTN...

Страница 19: ...2 2 Alphabetic List of Commands 2 5 T TERM z 2 16 Response Termination TOKN z 2 15 Token Mode SIM980 Analog Summing Amplifier...

Страница 20: ...host interface is stored in a 64 byte input buffer Characters accumulate in the input buffer until a command terminator either hCRi or hLFi is received at which point the mes sage is parsed and execut...

Страница 21: ...of the command Multiple parameters are separated by commas Multiple commands may be sent on one command line by separating them with semi colons so long as the input buffer does not overflow Commands...

Страница 22: ...et and query forms 2 4 3 Examples Each command is provided with a simple example illustrating its usage In these examples all data sent by the host computer to the SIM980 are set as straight teletype...

Страница 23: ...AN 2 1 CHAN 0 1 1 0 0 Read Offset Voltage READ i Query the output voltage in tenths of microvolts When the offset autocalibration circuitry is active an internal high gain amplifier is activated to mo...

Страница 24: ...flag is set see ARMC above an ACAL command will initiate an offset autocalibration cycle The entire process takes be tween 30 s and 90 s and should ideally be performed only after the SIM980 has been...

Страница 25: ...on modules default to PARI NONE PARI EVEN Example 2 4 7 Status Commands The Status commands query and configure registers associated with status reporting of the SIM980 Status Byte STB i Reads the St...

Страница 26: ...e ESE i j Set query the Standard Event Status Enable Register bit i to j ESE 6 1 Example ESE 64 Comm Error Status CESR i Query Comm Error Status Register for bit i Upon executing a CESR query the retu...

Страница 27: ...set any new service request will only pulse the STATUS signal low for a minimum of 1 s The default behavior is to latch STATUS low until a STB query is received At power on PSTA is set to OFF PSTA Ex...

Страница 28: ...xample Console Mode CONS z Set query the Console mode to z OFF 0 ON 1 CONS causes each character received at the Input Buffer to be copied to the Output Queue At power on and Device Clear CONS is set...

Страница 29: ...en 12 Bad token value 13 Bad hex block 14 Unknown token IDN Example LCME 4 The error 4 Illegal set is due to the missing Button LBTN Query the channel number of the last button pressed A query of LBTN...

Страница 30: ...2 CRLF 3 LFCR 4 The htermi sequence is appended to all query responses sent by the module and is constructed of ASCII character s 13 car riage return and 10 line feed The token mnemonic gives the seq...

Страница 31: ...rs These read write registers define a bitwise mask for their cor responding event register If any bit position is set in an event register while the same bit position is also set in the enable regist...

Страница 32: ...gister has become true IDLE Indicates that the Input Buffer is empty and the command parser is idle Can be used to help synchronize SIM980 query responses ESB Event Status Bit Indicates whether one or...

Страница 33: ...2 QYE 8 3 DDE 16 4 EXE 32 5 CME 64 6 URQ 128 7 PON OPC Operation Complete Set by the OPC command INP Input Buffer Error Indicates data has been discarded from the Input Buffer QYE Query Error Indicat...

Страница 34: ...g each asynchronous bit period window HWOVRN Hardware Overrun Set when an incoming serial data byte is lost due to internal processor latency Causes the Input Buffer to be flushed and resets the comma...

Страница 35: ...Output The output of the summing amplifier is overloaded output voltage exceeds 10 V Note that the output can overload with out any input channel overloading and vice versa 2 5 8 Overload Status OVSR...

Страница 36: ...2 22 Remote Operation SIM980 Analog Summing Amplifier...

Страница 37: ...ction 3 2 3 2 Tools and preparation 3 2 3 3 Precalibration Values 3 2 3 3 1 Offset Voltages 3 2 3 3 2 Calibration Words 3 3 3 3 3 DC Gain Match 3 3 3 3 4 AC Gain Match 3 3 3 4 Calibration 3 4 3 4 1 Of...

Страница 38: ...essible after removing the right side panel It is easier to calibrate the module by connecting it through a cable to the SIM extension port but the calibration can also be performed with the module lo...

Страница 39: ...oltage as V 2 Calculate the gain ratio mismatch as V 1 V 2 V 1 V 2 1 100 and record this value as the DC mismatch 3 3 4 AC Gain Match Using the same 1 to 4 splitter from section 3 3 3 connect all four...

Страница 40: ...minute wait for relays to cease switching for at least 10 seconds The output voltage will fluctuate during cal ibration but settle to less than 20 V Verify that the calibration words are within the v...

Страница 41: ...ccord ing to section 3 3 3 and record the results 3 4 3 AC Gain Calibration The SIM980 amplifier bandwidth rolls off around 6 MHz This is ac complished with a combination of fixed capacitors and one t...

Страница 42: ...he matching for the others This can be accomplished best by driving the two channels with the same signal and operating one in positive and the other one in negative mode while using R268 and C217 to...

Страница 43: ...d results General Name Serial Number Date Time Offset Voltage Output V Channel 1 V Channel 2 V Channel 3 V Channel 4 V Calibration Words OFST 1 OFST 2 OFST 3 OFST 4 OFST 5 OFST 6 Gain DC mismatch AC m...

Страница 44: ...3 8 Performance Tests SIM980 Analog Summing Amplifier...

Страница 45: ...A complete parts list and circuit schematics are included In This Chapter 4 1 Circuit Descriptions 4 2 4 1 1 Input circuitry 4 2 4 1 2 Summing circuitry 4 2 4 1 3 Output circuitry 4 2 4 1 4 Offset me...

Страница 46: ...olled by relays K201 K208 A combination of two dual pole dual throw relays per channel allows enable disable and polarity change with constant noise gain and signal bandwidth The difference amplifier...

Страница 47: ...erter U403 to minimize any input and the output offset voltage Chopper amplifier U404 is switched off dur ing normal operation to eliminate the potential noise generated by its internal chopping circu...

Страница 48: ...4 01308 97 6K J103 1 00302 Socket 0 100 3x2 R404 4 01310 102K J201 J206 1 00003 BNC R406 4 01348 255K JS201 1 01079 20 pin R407 4 01526 91K JS301 1 01080 20 Pin R408 4 01517 39K K201 K208 3 01492 ASX...

Страница 49: ...4 3 Schematic Diagrams 4 5 4 3 Schematic Diagrams Schematic diagrams follow this page SIM980 Analog Summing Amplifier...

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