Keithley 194A Manual Download Page 25 | Manualshive

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Keithley 194A Manual Download Page 25

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Summary of Contents for 194A

Page 1: ...e limited amount space available in this guide many details abourinstrument operation will not be found here Refer to the Model 194A Instwction Manual for aspects of instrument operation not covered i...

Page 2: ...amming Recalling Data Trigger Channel Selection Input Coupling Zero Filter FRONT PANEL PROGRAMS _ _ _ _ 25 SetUP status Reset XY Mode INPUT AND OUTPUT CONNECTIONS 3 A D Module InpuffOutput Connections...

Page 3: ...UNCTIONS Average Peak Peak to Peak TRMS Standard Deviation Integral Waveform FRONT PANEL PROGRAMS IEEE 466 Address Self Test Digital Calibration Calibration Storage X Output Full Scale Y Output Full S...

Page 4: ...ENGINEERING UNITS AND SCIENTIFIC NOTATION CONVERSION Prefix Engineering Symbol Scientific Notation I pico anO micro milli kilo mega giga tera peta 5...

Page 5: ...r receptacle 2 Do not exceed 30 rms between input low and earth ground 3 Do not exceed the maximum allowable input 8s defined in the condensed specifications section of this guide 4 Before servicing d...

Page 6: ...nel number 1 or 2 Channel 2 is available only for those units equipped with a Model lg44A AID module in the CARD 2 location The display can be operated singlechannel or dualchannel as selected with th...

Page 7: ...when either the 5OkHz or 5OOkHr analog filters are enabled SGUCONT Indicates when the instrument is in the single or ccmtinuou trigger SLOPE Shows whether the instrument will be triggered on the risi...

Page 8: ...sages associated with the various operating modes as described in the instruction manual MESSAGE DESCRIPTION OFLO Overrange input applied for at least one sample SHIFTLESS KEY Shift function invoked f...

Page 9: ...ample pressing SHIFT ZERO VAL allows a baseline value to be keyed in from the front panel While the shift function is enabled the associated indicator will be on Pressing a key which does not have a s...

Page 10: ...ative sample from the most positive samples Eample 2 3410 V P P 1 STD DEW Displays the standard deviation of the measure ment which shows how far the samples deviate from the average of the measuremen...

Page 11: ...der to use either of these modes the optional Model 1944A A D Module must be installed in the CARD 2 location If there is no second channel installed pressing either CHl CHZ or CHl CHZ module installe...

Page 12: ...he two channels as in this examole 2 4000 V 1 2 RANGE DESCRIPTION The ranging controls give you control over sensitivity of the measurement The range may be selected either on an automatic or manual b...

Page 13: ...highest 2OOVl range is reach ed Uprange also cancels autorange if that mode is presently enabled Uprange is also used with various other functions such as data entry and recall Downrange This key move...

Page 14: ...the entry process the keyed in digits will appear on the display OPERATION Numeric Keys O 9 I These keys enter actual numeric data including decimal point and sign into the display after the appropria...

Page 15: ...MHz kHz Hz1 units For ex ample sampling rate may be entered either as time inter val or sampling frequency units Cursor Control During the data entry process the digit af fected by pressing a numeric...

Page 16: ...cale Y Output Full Scale Limits Time Irsec lsec Frequency lHz 1MHz No l 65 535 lime Opsec 65 534sec NO Samples 65 536 to 10 lime 65 536 to 10 sec 20CW 2ocw l 1OV nominal l 1OV nominal bsohJtion 0 1rrj...

Page 17: ...entered in time Isec lpecl or frequency IHI 1MHr To program sampling rate press the RATE key and press the numeric buttons in the desired sequence Press the FRECUTIME key as required to enter time or...

Page 18: ...ode the RECALL indicator button will be on To ac cess individual samples either use the uprange or downrange keys to access individual samples or key in a specific sample number and press the ENTER ke...

Page 19: ...e respectiwindicator TRIGGER When selected with the SOURCE key pressing this keeywill initiate a continuous or single measurement depending on the selected mode SLOPE Rising or falling edge triggering...

Page 20: ...o select one of three display modes channel 1 channel 2 or dual channel display For the two single channel modes the displayed channel also determines which channel will be affected by pressing other...

Page 21: ...d indicated by the respec tiw indicaton When ground coupling is selected both ac and dc will be off OPERATION The input circuit is configured as follows for the three modes DC A straight through dc si...

Page 22: ...rom the number to be displayed OPERATION Zeroing an Applied Signal Connect the signal to act as a zero baseline with zero disabled and press the ZERO key Apply the measured signal and take readings es...

Page 23: ...with the FILTER buttton When either the 5OkHz or SOOkHz filters are enabled the FILTERindicator will be on OPERATION To select one of the filters simply press the FILTER button until the correct displ...

Page 24: ...umbered O S and are entered by pressing the OTHER key Once this mode has been entered you can either key in the appropriate digit or use the uprange and downrange keys to scroll through available prog...

Page 25: ...ibrated X Output Full Scale SHIFT OTHER 4 Programs the max imun voltage at the X analog output jack Y Output Full Scale SHIFT OTHER 51 Sets the maximum voltage of the Y analog 0utpuL 2 Output Blanking...

Page 26: ...utton twice followed by the desired setup number W2 Press ENTER to store the selected configuration Setup 0 contains the fectoly defaults and Cannot be reprogrammed Recalling Setups Press SETUP follow...

Page 27: ...ugh the list et about one item per second Zero value Filter status 50kHz or SOOkHzj Trigger cum Wgger mode Trigger delay migger level Sample rate Measurement size Maximum semple rate for each resoluti...

Page 28: ...ous scaling fac tom cm be applied to the data before being plotted OPERATION XY MODE Enters the XY mode and ellows the election of the type of plotting device CRT oscilloxopa or plotter XY DATA Allows...

Page 29: ...XY ZOOM Provides a methad of scaling data located in the buffer to the display window XY PAN Controls which data point is the first displayed in the window 30...

Page 30: ...r processing and AID conversion Note that the maximum input voltage is 25OVps ak 2 x 10 V Hz The maximum cmnmon mode voltage is 30 REAL TIME OUTPUT A D data at the sampling rate may be read via this o...

Page 31: ...g at these jacks are controlled by the XY mode Each jack is a standard BNC m eCtOL X OUTPUTr This signal which provides time information should be used as en X axis signal for a plotter or CRT Y OUTPU...

Page 32: ...ynchronize sample taking to an external time base Detection and switching is a tOmatic CLK OUT Normally the internal 1OMHz clock TTL levels1 of the Model lg4A will appear et this output If the unit Is...

Page 33: ...PENDENT COMMANDS FUNCTION FS FO F7 F20 Fl F21 F2 F3 F4 FS Standard deviation Waveform bmple at trigger point Integral CHI CHZ Average CHlICH2 TRMS Peak Peek Peak to oeak Auto 320mV 3 2V 32v 2oov Cance...

Page 34: ...ngle GET Continuous X Single X Continuous external Single external Continuous slope level m i ZOOrmr 2OOV Single slope level m 200 ms 200Vl Continuous slope level m 200sm 200Vl Single lope level m I 2...

Page 35: ...efix on suffix off ASCII 1 rdg prefix off suffix off ASCII 1 rdg prefix an suffix on SC11 n rdgs prefix on suffix off ASCII n rdgs prefix 0 suffix ofl ASCII n rdgs prefix oh suffix on Binary n rdgs pr...

Page 36: ...art Measurement buffer 64k RAM buffer Display readings IEEE 488 reading buffer m X output full tale voltage 1 smsl0 m Y output full scale voltage 1 smrlo m Z output blanking level U high O loW m XY zo...

Page 37: ...reading buffer on Circular reading buffer on F PO flLTEi7 Filter off F1 F2 500kHz filter 50kHz filter Z3 m 24 Z5 m Use value m as baseline value 200 ms 200V 22 Zl 23 Zl ZOOsms ZOOVI INPUT COUPLING IO...

Page 38: ...or status Data muus Zero IZ parameter Delay WI parameter Number samples NI parameter Sample rate 61 parameter Trigger levsl Measurement buffer start pointer Measurement buffer end pointer Reading buff...

Page 39: ...TERMINATOR Ylll Yn m Y DELI Program m as single terminator Program mn as dual terminator No terminator RECALL A0 Al A2 Recall factory setup Recall setup 1 Recall setup 2 41...

Page 40: ...as if button n l 381 has been pressed DISPLAY DaaaaX DX Display ASCII characters aaaa 114 maximum Return to normal display mode SELF TEST Jl Ul self test byte 1 fail EXECUTE X Execute other devicedep...

Page 41: ...Figure 1 SRQ Mask and Status Byte Format Figure 2 ASCII Data Format GO to G5 43...

Page 42: ......

Page 43: ...Figure 3 Binary Data Format Cont 45...

Page 44: ...07 INTEGRAL 20 CHl CH2 21 CHl CH2 RANGE Ann O AUTO 1 32OmV 2 3 2V 3 32V 4 2OOV TRIGGER mn OO CONTINUOUS TALK Ol SINGLE TALK OZ CONTINUOUS GET 03 SINGLE GET 04 CONTINUOUS X 05 SINGLE X OB CONTINUOUS E...

Page 45: ...TTING 31 STOP PLOTTING FILTER Pn O OFF 1 600kHr 2 50kHz ZERO Zn O DISABLED 1 ENABLED 2 SAVE MEAS S USE VAL 4 Zl 22 5 Zl f Z3 EOI BUS HOLD OFF Kn O EOI HOLD OFF l NO EOI HOLD OFFS 2 EOI NO HOLD OFF 3 N...

Page 46: ...LG ll SAMPLES lZ RATE 13 LOCAL 14 CHANNEL 15 AUTO 16 l7 18 SHIFT lS RECALL 2O sTATUS Zl ENTER ZZ CANCEL ZB FREQ TIME 24 7 25 4 26 1 27 8 28 5 29 2 3O S 31 6 32 3 33 6 34 35 36 MHz 37 kHr 38 Hr Figure...

Page 47: ...CULAR BUFFER OVERWRITE DATA FORM T IGn O ASCII PREFIX ON SUFFIX OFF RDG l ASCII PREFIX OFF SUFFlX OFF RDG 2 ASCII PREFIX ON SUFFlX ON IRDG 3 ASCIL PREFIX ON SUFFIX OFF n RDGS 4 ASCII PREFIX OFF SUFFIX...

Page 48: ...G 2X A D ERROR ON CH2 ISEE TABLE BELOW FOR X MEANING A D ERROR CODES O NOISY AID l NOT USED 2 INOPERATIVE CAL 3 NOT USED 4 NOT USED ADJUSTMENT 5 TIMEBASE ERROR fi NOT USED 7 RAM ERROR CHANNEL Cm Ol CH...

Page 49: ...TERMINATOR Ynnnnnn nnnnnn YlASCII 000000 No TERMINATOR O SOlO CR LF TERMINATOR DEFAULT CR LF Figure 4 UO Status Word Format Cont...

Page 50: ...ED IN UO STATUS 0 NOW 21 1 ZERO 22 2 Flu m 28 3 TRIGGER 24 SGL CONT SOURCE 25 26 6 DELAY 27 7 SLOP 28 8 EE 29 9 80 10 CPLG 31 11 SAMPLES 32 12 RAT 2 33 I3 LOCAL 84 14 ChxNNEL I5 Au r0 E 16 uP JW 37 I7...

Page 51: ...Figure 5 Ul Status Word Format 53...

Page 52: ...54...

Page 53: ...Figure 7 U3 Ull Status Word Formats 55...

Page 54: ...group of commands at one time For example the word SETUP1 could be used to replace the following corn mand string FlS lOON250W 25Z1P2X RESERVED WORDS AND SYMBOL Tmnslator resewed words and symbol are...

Page 55: ...EXAMPLES ALIAS SETUP1 ROFlX Defines the word SETUP in place of ROFlX ALIAS TE 34 N1000S 1010X Defines TEST4 in place of N1000S 1010X 57...

Page 56: ...instrument reading string The returned data is an ASCII string variable of the form NAVG 1 2345 CR LF Here CR LF represents the default carriage return line feed terminator and will not normally be d...

Page 57: ...IBM XT or PC with CEC Interface...

Page 58: ...address of the Model 194A to 9 2 With the power off connect the Model 194A to the HP82937A GPIB interface installed in the 9816 computer 3 Type EDIT and press the EXEC key 4 Enter the lines in the pr...

Page 59: ...IBRE OTE789 Place 194A in remote 20 INPUT COFiMClND Prompt for and input command STRING A 30 OUTPU 09 Address 194A to listen send string 40 ENTER709 BB Address 194A to talk input readina Display readi...

Page 60: ...cimal Hexadecimal ASCII I 0 00 NUL 1 01 SOH GTL 2 02 8Tx 3 03 4 04 6 05 06 07 8 08 9 09 10 OA 11 08 ETX EOT ENQ ACK 8EL 8S HT LF VT SDC PPC GET TCT 12 oc FF 13 OD CR 14 OE so 15 OF SI 16 10 DLE 17 DC1...

Page 61: ...2F 2F 48 48 30 30 49 49 31 31 50 50 32 32 z z 33 33 34 34 53 53 35 35 54 54 36 36 66 66 56 56 57 57 39 39 58 58 3A 3A 59 59 38 38 MLA 27 MLA 28 60 61 MLA 29 62 3E MLA 30 63 3F UNL MIA3 i MLA MLA 4 5 M...

Page 62: ...7 57 88 5 Decimal Hexadecimal ASCII IEEE 468 Message 64 40 f MTA 0 65 41 MTA 1 D MTA 4 E MTA 5 F MTA 6 ii MTA MTA 7 8 I MTA 9 J MTA 10 K MTA 11 L MTA 12 M MTA 13 N MTA 14 0 MTA 15 P MTA 16 Q MTA 17 R...

Page 63: ...PPE MSA 9 PPE 106 ETA 107 66 MSA 10 PPE MSA ll PPE 108 6C I MSA 12 PPE 109 6D m MSA 13 PPE 110 6E n MSA 14 PPE 111 112 113 114 115 116 117 118 119 120 12 122 123 124 125 126 127 6F 70 71 72 76 76 79 7...

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