Digital Storage Oscilloscope Programming Manual
Contents
1. TRIGger REJect Select and query the frequency rejection mode Syntax TRIGger REJect lt 01112 gt TRIGger REJect Arguments 0 OFF 1 Low frequency reject mode 2 High frequency reject mode Returns lt NR1 gt TRIGger SLOP Switch and query the rising or falling trigger slope Syntax TRIGger SLOP lt 011 gt TRIGger SLOP Arguments 0 Rising slope 1 Falling slope IDS 700 amp 800 Series Programming Manual Returns lt NR1 gt TRIGger SOURce Select and query the trigger source Syntax TRIGger SOURce lt 0111213 gt TRIGger SOURce Arguments 0 Channel 1 1 Channel 2 2 External trigger 3AC line voltage Returns lt NR1 gt TRIGger TYPe Select and query the trigger type Syntax TRIGger TYPe lt 0111213 gt TRIGger TY Pe Arguments 0 Edge 1 Video 2 Pulse 3 Delay Returns lt NR1 gt TRIGger VIDeo FIELd Select and query the field on which the video trigger mode will be triggered Syntax TRIGger VIDeo FIELd lt 01112 gt TRIGger VIDeo FIELd Arguments 0 Line 1 Odd frame Field 1 2Even frame Field 2 Returns lt NR1 gt IDS 700 amp 800 Series Programming Manual TRIGger VIDeo LINe Select and query the specified line for a video signal Syntax TRIGger VIDeo LINe lt NRI gt TRIGger VIDeo LINe Arguments lt NR1 gt is the desired line For the NTSC system the line range is from 1 263 for Odd frames 1 262 for even frames For the PAL system the line2. printf error cannot write s n r writeFilename exit 1 void Delay int i int j k for j 0 j lt i j for k 0 k lt 30000 k void Showlbsta char c if ibsta amp ERR if c printf n rUnable write to device ibsta x iberr x n r ibsta iberr else printf n rUnable read from device ibsta x iberr x n r ibsta iberr else if c printf n rWrite ibsta x ibsta else printf n rRead ibsta X ibsta
3. Arguments lt X gt Specify the channel number 112 0 Turn off math funciton 1 Select the add operator 2 Select the subtract operator 3Select the FFT operation Returns lt NR1 gt CHANhnel lt X gt OFFSet Sets or query the offset voltage Syntax CHANnel lt X gt OFFSet lt NR3 gt CHANnel lt X gt OFFSet Arguments lt X gt Specify the channel number 1 2 lt NR3 gt is the desired offset value in volts The range is dependent on the scale and the probe attenuation factor The offset ranges IDS 700 amp 800 Series Programming Manual are as follows Offset Range 2mV div 50mV div 0 5V 100mV div 500mV div 5V 1V div 5V div 50V The next table shows the relationship between the lt NR3 gt value and matching offset voltage 0 002 2mV 0 01 10mV 0 1 100mV 101V 0 005 2mV 0 02 20mV 0 2 200mV 292V 0 05 50mV_ 0 5 500mV 5 5V Returns lt NR3 gt CHANhnel lt X PROBe Select the different probe attenuation factor Syntax CHANnel lt X gt PROBe 01112 CHANnel lt X gt PROBe Arguments lt X gt Specify the channel number 112 0 1X 1 10X 2 100X Returns lt NR1 gt CHANnel lt X gt SCALe Sets or query the vertical scale of the specified channel Syntax gt CHANnel lt X gt SCALe lt NR3 gt CHANnel lt X gt SCALe Arguments lt X gt Specify the channel number 1 2 lt NR3 gt is the desired gain value in volts per IDS 700 amp 800 Series Progr
4. MEASure SOURce MEASure PERiod query only Return the timing value of period measurement Syntax MEASure PERiod Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure PWIDth query only Return the value of timing measurement of the first positive pulse in the waveform Syntax MEASure PWIDth Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure RlSe query only Return the value of timing measurement taken for the rising edge of the first pulse in the waveform Syntax MEASure RISe Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce 1MEASure SOURce Select the measured channel channel 1 or 2 The default setting of measured IDS 700 amp 800 Series Programming Manual channel is channel one Note Please select the specific channel before implementing any measurement Syntax MEASure SOURce 112 Arguments 1 Enable the measurement functions for channel 1 2 Enable the measurement functions for channel 2 Returns lt NR1 gt MEASure VAMPlitude query only Return the voltages of high value minus the low value Syntax MEASure V AMPlitude Returns lt NR3 gt Note Please select the s
5. Select the dots or vectors display for data points Syntax DISPlay WAVeform lt 011 gt DISPlay WAVeform Arguments 0 Enable vectors display 1 Enable dots display Returns lt NR1 gt MEASure FALL query only Return the value of the timing measurement taken from the falling edge of the first pulse in the waveform Syntax IDS 700 amp 800 Series Programming Manual MEASure FALL Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure FREQuency query only Return the value of Frequency measurement Syntax MEASure FREQuency Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure NWIDth query only Return the value of timing measurement from the first negative pulse in the waveform Syntax MEASure NWIDth Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure PDUTy query only Return the ratio of the positive pulse width to the signal period Syntax MEASure PDUT y Returns lt NR2 gt is the percentage of ratio The range is from 1 to 99 Note Please select the specific channel before implementing any measurement For explanation see IDS 700 amp 800 Series Programming Manual
6. amp 800 Series Programming Manual Syntax WMEMory lt X gt OFFSet lt NR1 gt Arguments lt X gt Specify the location of RefA or RefB memory 1 2 lt NRI gt is the desired offset position The range is from 100 to 100 WMEMory lt X gt SAVe Select whether the memory set will be saved Syntax WMEMory lt X gt SAVe lt 11213 gt Arguments lt X gt Specify the location of RefA or RefB memory 1 2 1 Channel 1 2 Channel 2 3 Math function 5 Status Reports A set of status registers allows the user to quickly determine the Digital Storage Oscilloscopes internal processing status The status register as well as the status and event reporting system adhere to SCPI recommendations Structure of System The sketch of the status and event reporting system is shown in figure 5 1 Each component of the sketch represents a set of registers and queues which can read reported on or can enable the occurrence of certain events within the system Ifa specific event in the Digital Storage Oscilloscope sets a bit in a status register reading the status registers can tell you what types of events have occurred Each bit in the status register corresponds to a bit in an enable register the enable bit must be high for the event to be reported to the Status Byte Register A Service Request SRQ is the last event to occur The SRQ requests an interrupt on the GPIB to report events to the system controller IDS 700 amp
7. 800 Series Programming Manual Status Registers Two kinds of status registers are included within the IDS 820 IDS 840 Digital Storage Oscilloscope OPERation Status Registers CONDition EVENt and ENABle QUEStionable Status Registers CONDition EVENt and ENABle The STATus subsystem is the hierarchical set of commands Figure 5 2 that read the SCPI defined status registers The lower level nodes QUEStionable and OPERation each have three 16 bits registers CONDition EVENt and ENABle Figure 5 3 shows the sequential relationship between these three types of registers and the commands which relate to each register QUEStionable Status NotUsed 2 Not Used Not Used 2 NotUsed 4 NotUsed Not Used Statu SR egisters Not Used NotUsed CIN Not Used 5 p NotUsed 2 4 NotUsed 24 NotUsed H Not Used 24 NotUsed 5 NotUsed 44 Not Used 5 OPERation Status Not Used H Not Used Not Used 2 Not Used 34 Not Used Not Used Not Used Status R egisters Not Used Not Used ETS Not Used a Not Used 1 Not Used Not Used 2 Not Used Not Used 44 Not Used 44 Operation Complete RequestC ontrol NI Query Error R egisters N Device D ependent Error Execution Error Command Error User Request Power On AE j i i NE i Summary of IEEE 488 2 Status Stru
8. Parameter Type Fa Space Figure 3 4 Command Header with Parameter Table 3 1 defines the Boolean and other parameter types for the IDS 820 IDS 840 IDS 700 amp 800 Series Programming Manual Parameter Type Description Example Boolean Boolean numbers or values 10 NR1 Integers 0 1 18 NR2 Decimal numbers 1 5 3 141 8 4 NR3 Floating point numbers 4 5E 1 8 25E 1 NRf NR1 NR2 or NR3 1 1 5 4 5E 1 Table 3 1 Parameter Types for Syntax Descriptions For the actual value of the parameter type lt Boolean gt you have to enter 0 instead of OFF or enter 1 instead of ON The following example includes both the header and a value for the parameter type TRIGger NREJ 0 Parameter values that appear in this manual are usually separated by a vertical line This vertical line has the same meaning as the word or For example values for the parameter lt Boolean gt are OI This is the same as saying 0 off or 1 on Any single value is a valid parameter Message Terminator and Message Separator In accordance with the IEEE 488 2 standard the IDS 820 IDS 840 accepts any of the following message terminators LF END Line feed code hexadecimal OA with END message LF Line feed code lt dab gt END Last data byte with END message These terminators are compatible with most application programs A semicolon separates one command from another when the commands appear on the same
9. Returns the unique identification code of the IDS 820 IDS 840 Syntax IDN Examples IDN Returns IDS 820 IDS 840 0 lt Firmware version gt LRN query only Returns the string that the IDS 820 IDS 840 settings will be listed Syntax LRN Returns IDS 700 amp 800 Series Programming Manual 500 MODe 1 POINt CHANnell BWLimit 0 CO 1 128e 00 PROBe 0 S 2 000e 01 TH 0 C 000e 03 pon 636e 00 orm 0 BRIGhtness DAT WIDth 0 NWIDt APlit 0 000e 00 VRMS 0 a AAA KAT e 0 000e 00 The command form OPC sets the operation complete bit bit 0 in the Standard Event Status Register SESR when all pending operations finish The query form OPC tells the oscilloscope to place an ASCII 1 in the Output Queue when the oscilloscope completes all pending operations Syntax OPC OPC Returns RCL Recall the setting data from memory which were previously saved The settings of the RS 232 or GPIB can be stored in memories M1 to M15 However if the user recalls a stored memory in which the settings of the RS 232 or GPIB are different to the present settings the RS 232 or GPIB settings will remain unchanged The current RS 232 or GPIB settings will not to be affected by the recalled setting of RS 232 or GPIB for the moment Syntax RCL lt NRI gt Arguments 115 Examples RCL 1 recalls the setting data located at the first position
10. coupling Syntax TRIGger COUPIe lt 011 gt TRIGger COUPle Arguments O AC 1 DC Returns lt NR1 gt TRIGger DELay TIMe Set and query the user defined delay trigger time Syntax TRIGger DELay TIMe IDS 700 amp 800 Series Programming Manual lt NR3 gt TRIGger DELay TIMe Arguments lt NR3 gt is the desired user defined delay time The range is from 100ns 1 3ms Returns lt NR3 gt Note Please select the specific delay type before implementing any measurement For explanation see TRIGger DELay TY Pe TRIGger DELay EVENt Sets and query the user defined delay trigger events Syntax TRIGger DELay EVENt lt NRI gt TRIGger DELay EVENt Arguments lt NRI gt is the desired user defined delay trigger events The range is from 2 65000 Returns lt NR1 gt Note Please select the specific delay type before implementing any measurement For explanation see TRIGger DELay TYPe TRIGger DELay LEVel Set and query the user defined start trigger signal level Syntax TRIGger DELay LEVel lt NR3 gt TRIGger DELay LEVel Arguments lt NR3 gt is the desired user defined start trigger signal level The range is 12 Returns lt NR3 gt IDS 700 amp 800 Series Programming Manual TRIGger DELay MODe Select and query the start trigger i e external trigger signal level Syntax TRIGger DELay MODe lt 01112 gt TRIGger DELay MODe Arguments O TTL 1 ECL 2 USR R
11. instrument please apply ACQuire MODe 2 in advance Syntax ACQuire AVERage 112131415161718 ACQuire A VERage Arguments 1 Average number is 2 2 Average number is 4 3 Average number is 8 4 Average number is 16 5 Average number is 32 6 Average number is 64 7 Average number is 128 8 Average number is 256 Returns lt NR1 gt ACQuire LENGth Select the record length The IDS 820 IDS 840 provides record lengths of 500 1250 2500 5000 12500 25000 50000 and 125000 IDS 700 amp 800 Series Programming Manual Syntax ACQuire LENGth 011121314151617 ACQuire LENGth Arguments 0 Record length is 500 1 Record length is 1250 2 Record length is 2500 3 Record length is 5000 4 Record length is 12500 5 Record length is 25000 6 Record length is 50000 7 Record length is 125000 Returns lt NR1 gt ACQuire MODe Select the waveform acquisition mode There are four different acquisition modes sample peak detection average and accumulate Syntax ACQuire MODe 01112 ACQuire MODe Arguments 0 Select the sample mode 1 Select the peak detection mode 2 Select the average mode Returns lt NR1 gt Note Please select the specific acquire mode before implementing any acquisition ACQuire lt X gt POINTt Transfer waveform data 500 data points in total from the IDS 820 IDS 840 Each point is composed of two bytes the integer value of 16 bits The high byte MSD is transf
12. of memory address RST no query form Sets all control settings of the oscilloscope to their default values but does not purge stored setting IDS 700 amp 800 Series Programming Manual Syntax RST SAV Saves the setting data to memory Syntax SAV lt NRI gt Arguments 1 15 Examples SAV 2 saves the setting data to the second position of memory queue SRE Setup the contents of the Service Request Enable Register SRER The query form returns the contents of the SRER Bit 6 of the SRER is always zero The bits on the SRER correspond to the bits on the SBR Syntax SRE lt NRI gt SRE Arguments lt NR1 gt is an integer from 0 to 255 Returns lt NRI gt Examples SRE 7sets bits of the SRER to 0000 0111 If the SRE returns 0000 0011 the setting of SRE is 3 STB query only Query of the Status Byte register SBR with STB will return a decimal number representing the bits that are set true in the status register Syntax IDS 700 amp 800 Series Programming Manual STB Returns lt NR1 gt Examples STB returns 81 if SBR contains the binary value 0101 0001 WAI no query form WAI prevents the programming instrument from executing further commands or queries until all pending operations finish Syntax WAI ACQuire AVERage Select the average number of waveform acquisition The range for averaging is from 2 to 256 in powers of 2 Note Before using this
13. 011 Arguments 0 Disable cursors display 1 Enable cursors display Returns lt NR1 gt CURSor YDISplay Enable or disable the cursors display for Y axis Syntax CURSor YDISplay 011 Arguments IDS 700 amp 800 Series Programming Manual 0 Disable cursors display 1 Enable cursors display Returns lt NRI gt CURSor SOURce Select which channels cursor is active for front panel control Syntax CURSor SOURce 11213 CURSor SOURce Arguments 1 Select channel 1 for cursor measurement 2 Select channel 2 for cursors measurement 3 Select math function for cursors measurement Returns lt NR1 gt DISPlay ACCumulate Select the accumulate display mode Syntax DISPlay ACCumulate Ol1 DISPlay ACCumulate Arguments 0 Disable accumulate display mode 1 Enable accumulate display mode Returns lt NR1 gt DISPlay CONTrast DATa Select contrast level of LCD screen for data readout and waveform displays Syntax DISPlay CONTrast DATa IDS 700 amp 800 Series Programming Manual lt NRI gt DISPlay CONTrast DATa Arguments lt NRI gt is the desired brightness level The range is from 0 20 0 to 100 Returns lt NR1 gt DISPlay GRATicule Select graticule display type for LCD screen Syntax DISPlay GRATicule 01112 DISPlay GRATicule Arguments 0 Select full grids 1 Select cross type 2 Only the frame is displayed Returns lt NR1 gt DISPlay WAVeform
14. GO BNC output 2 3 GPIB port option 4 5 USB connector Printer port 9 RS 232 port Soo wes wes we 4 Fuse drawer 5 SELF CAL BNC output 2 Computer Connection A personal computer with a GPIB card is the essential stuff in order to operate the IDS 820 IDS 840 via GPIB interface Connect between IDS 820 IDS 840 Digital storage Oscilloscope and computer as follows Connect one end of a GPIB cable to the computer i Connect the other end of the GPIB cable to the GPIB port on the IDS 820 IDS 840 Digital storage Oscilloscope il Turn on the IDS 820 IDS 840 Digital storage Oscilloscope IV Turn on the computer IDS 700 amp 800 Series Programming Manual The GPIB interface capabilities The GPIB interface of the IDS 820 IDS 840 corresponds to the standard of IEEE488 1 1987 IEEE488 2 1992 and SCPI 1994 The GPIB interface functions are listed as follows SH1 Source The IDS 820 IDS 840 can transmit multilane messages Handshake across the GPIB AH1 Acceptor The IDS 820 IDS 840 can receive multilane messages across Handshake the GPIB T6 Talker Talker interface function includes basic talker serial poll and unaddress if MLA capabilities without talk only mode function L4 Listener The IDS 820 IDS 840 becomes a listener when the controller sends its listen address with the ATN attention line asserted The IDS 820 IDS 840 does not have listen only capabilit
15. IDS 700 amp 800 Series Programming Manual Digital Storage Oscilloscope IDS 700 amp IDS 800 Series Programming Manual 2003 RS Components Ltd All rights reserved IDS 700 amp 800 Series Programming Manual Due to continuous improvements in the IDS 700 amp 800 series Digital Storage Oscilloscopes information contained in this manual is subject to change without notice Contact RS Components for revisions and corrections This document supports firmware version v1 07 and previous version RS RS Components Ltd PO Box 99 Corby Northants NN17 9RS United Kingdom Tel 44 0 1536 201234 Fax 44 0 1536 405678 Internet rswww com IDS 700 amp 800 Series Programming Manual 1 Introduction The IDS 820 IDS 840 Digital Storage Oscilloscope can be driven using the GPIB General Purpose Interface Bus or the RS 232 serial connection system with a computer Commands sent over either interface can read or set any IDS 820 840 s instruction This chapter explains how to carry out the following tasks Note Not all interface options are available on all models refer to individual product specifications for applicable options Notes for GPIB installation If you are setting up the IDS 820 IDS 840 with a GPIB system please comply with the following requirements Only a maximum of 15 devices can be connected to a single GPIB bus Do not use more than 20 m of cable to connect devices to a bus Connect one
16. J for Visual C that provided by National Instruments Corporation DECL 32 H is a Win32 C C include file that contains NI 488 2 function prototypes and various pre defined constants It s also provided by NI Copyright GOOD WILL INSTRUMENT All Rights Reserved include lt stdio h gt include lt stdlib h gt include lt string h gt Include the WINDOWS H and DECL 32 H files The standard Windows header file WINDOWS H contains definitions used by DECL 32 H and DECL 32 H contains prototypes for the GPIB routines and constants include lt windows h gt include decl 32 h IDS 700 amp 800 Series Programming Manual define ARRAYSIZE 1100 Size of read buffer define BDINDEX 0 Board Index define PRIMARY_ADDR OF DMM 7 Default primary address of IDS820 840 define NO_SECONDARY_ADDR 0 Secondary address of device define TIMEOUT T3s Timeout value 5 seconds define EOTMODE 1 Enable the END message define EOSMODE 0 Disable the EOS mode ca void Acquire void void Delay int void Showlbsta char int Dev Device handle unsigned char ReadBuffer 201 Read data buffer char ErrorMnemonic 21 5 EDVR IDS 700 amp 800 Series Programming Manual EB US ESTB ESRQ ETAB unsigned char WaveBuf ARRAYSIZE int _cdecl main void int i count 0 unsigned char ch Dev ibdev BDINDEX PRIMARY
17. MO Showlbsta 1 return 0 Delay 1000 iowrt Dev CHANnel1 OFFSet O n 19L Set offset voltage OV printf CHANnel1 OFFSet O n r if iosta amp ERR iosta amp TIMO Showlbsta 1 return 0 Delay 1000 ibwrt Dev CHANnel1 SCALe 0 5 n 20L Set vertical scale 500mV div printf CHANnel1 SCALe 0 5 n r if ibsta amp ERR ibsta amp TIMO Showlbsta 1 return 0 Delay 1000 iowrt Dev ACQuire MODe O n 16L Set acquire mode sample mode printf ACQuire MODe O n r if ibsta amp ERR ibsta amp TIMO Showlbsta 1 IDS 700 amp 800 Series Programming Manual return 0 Delay 1000 ibwrt Dev TRIGger LEVel 0 3 n 19L Set trigger level 0 3V printf TRIGger LEVel 0 3 n r if ibsta amp ERR ibsta amp TIMO Showlbsta 1 return 0 Delay 1000 iowrt Dev TRIGger MODe 1 n 16L Set trigger mode AUTO printf TRIGger MODe 1 n r if ibsta amp ERR ibsta amp TIMO Showlbsta 1 return 0 Delay 10000 Waiting for acquisition process and IDS 820 IDS840 internal process The delay time depend on the timebase that you selected Low speed division require much more time for acquisition It s recommended a minimum 200ms delay time after the last command before getting the waveform data from IDS 820 IDS 840 Acquire Get waveform data ibwrt De
18. Programming Manual 4 Details of Command Reference Each command in this chapter will be given a brief description The examples of each command will be provided and what query form might return CLS no query form Clears all event status data register This includes the Output Queue Operation Event Status Register Questionable Event Status Register and Standard Event Status Register Syntax CLS Examples CLS clears all event registers ESE Sets or returns the bits in the Event Status Enable Register ESER The ESER enables the Standard Event Status Register SESR to be summarized on bit 5 ESB of the Status Byte Register SBR Syntax ESE lt NRI gt ESE Arguments lt NR1 gt is a number from 0 to 255 The binary bits of the ESER are set according to this value Returns lt NR1 gt is a number from 0 to 255 that indicates the decimal value of the binary bits of the ESER Examples ESE 65 sets the ESER to binary 0100 0001 If the ESER contains the binary value 1000 0010 the ESE will return thevalue of 130 ESR query only IDS 700 amp 800 Series Programming Manual Returns and clears the contents of the Standard Event Status Register SESR Syntax ESR Returns lt NR1 gt is a number from 0 to 255 that indicates the decimal value of the binary bits of the ESER Examples If the ESER contains the binary value 1100 0110 the ESR will return the value of 198 IDN query only
19. RS 232 interface please check the following points Do not connect the output line of one DTE device to the output line of the other Many devices require a constant high signal on one or more input pins Ensure that the signal ground of the equipment is connected to the signal ground of the external device Ensure that the chassis ground of the equipment is connected to the chassis ground of the external device Do not use more than 15m of cable to connect devices to a PC Ensure the same configurations are used on the device as the one used on PC terminal Ensure the connector for the both side of cable and the internal connected line are met the demand of the instrument Computer s Connection for RS 232 A personal computer with a COM port is the essential facilities in order to operate the digitizing oscilloscope via RS 232 interface The connections between oscilloscope and computer are as follows Connect one end of a RS 232 cable to the computer Connect the other end of the cable to the RS 232 port on the oscilloscope Turn on the oscilloscope Turn on the computer Figure 1 3 shows the GPIB port and RS 232 port s locations on the rear panel of the IDS 820 IDS 840 Digital storage Oscilloscope IDS 700 amp 800 Series Programming Manual Figure 1 3 Rear Panel of IDS 820 840 1 6 7 8 9 Main power switch 2 AC power socket 1 GO NO
20. _ADDR_OF_DMM NO_SECONDARY_ADDR TIMEOUT EOTMODE EOSMODE if ibsta amp ERR printf n rUnable to open device ibclr Dev if ibsta amp ERR printf n rUnable to clear device ibsta x iberr x ibsta iberr ibwrt Dev CLS n 5L Clear ths status registers and printf n r CLS n r Output buffer of IDS 820 IDS 840 if ibsta amp ERR ibsta amp TIMO Showlbsta 1 return 0 Delay 1000 ibwrt Dev IDN n 6L Get the unique identification printf IDN n r code of the IDS 820 IDS 840 if ibsta amp ERR ibsta amp TIMO Showlbsta 1 return 0 while 1 ibrd Dev ReadBuffer 100 Read datas from input bufer if ibsta amp ERR iosta amp TIMO Showlbsta 0 return 0 for i 0 i lt ibcntl i ch ReadBuffer i WaveBuf count ch if ch n WaveBuf count 0x00 printf s n r WaveBuf break Delay 1000 iowrt Dev RUN n 5L Let the IDS 820 IDS 840 run printf RUN n r if iosta amp ERR ibsta amp TIMO Showlbsta 1 return 0 Delay 1000 iowrt Dev CHANnel1 DISPlay 1 n 20L Set channel 1 display on IDS 700 amp 800 Series Programming Manual printf CHANnel1 DISPlay 1 n r if ibsta amp ERR ibsta amp TIMO Showlbsta 1 return 0 Delay 1000 iowrt Dev TIMebase SCALe 2 0e 4 n 23L Set timebase 200us div printf TIMebase SCALe 1 0e 4 n r if ibsta amp ERR iosta amp TI
21. amming Manual division The range is 2mV div to5V div with 1X probe Next table shows the relationship between the lt NR3 gt value and matching scale 0 002 2mV 0 016 10mV 0 16 100mV 101V 0 005 2mV 0 026 20mV 0 26 200mV 202V 0 05 50mV 0 5 500mV 5 5V Returns lt NR3 gt Examples CHANhell SCALe 1 setup the channel one at 1V per division CURSor X lt X gt Position Select the cursors position of X axis Syntax CURSor X lt X gt Position lt NR1 gt CURSor X lt X gt Position Arguments lt X gt Specify the cursor 1 2 lt NR1 gt is the desired position For x axis operation the range is 0 to 250 for y axis operation the range is 0 to 200 Returns lt NR1 gt CURSor Y lt X gt Position Select the cursors position of Y axis Syntax CURSor Y lt X gt Position lt NR1 gt CURSor Y lt X gt Position IDS 700 amp 800 Series Programming Manual Arguments lt X gt Specify the cursor 1 2 lt NR1 gt is the desired position For x axis operation the range is 0 to 250 for y axis operation the range is 0 to 200 Returns lt NR1 gt CURSor lt X gt DELta query only Return the time or voltage difference between the two vertical or horizontal cursors Syntax CURSor XDELta CURSor YDELta Arguments lt X gt Specify the time or voltage difference X Y Returns lt NR3 gt CURSor XDISplay Enable or disable the cursor display for X axis Syntax CURSor XDISplay
22. cilloscope has the following enable registers Event Status Enable Register ESER OPERation Enable Register QUEStionable Enable Register Service Request Enable Register SRER When one of the bits of the enable registers is high and the corresponding bit in the status register is high the enable registers will perform a logical OR function the output that controls the set bit of the Status Byte Register is high Various commands set the bits in the enable registers The following sections describe the enable registers and the commands that set them Event Status Enable Register ESER The ESER controls which types of events are summarized by the Event Status Bit ESB in the SBR The bits of the ESER correspond to the bits of the SESR Use the ESE command to set the bits in ESER Use the ESE command to read it OPERation Enable Register Even though the OPERation Enable Register is present in this digital storage oscilloscope the OPERation registers do not report any conditions QUEStionable Enable Register The QUEStionable Enable Register controls which types of events are summarized by the QUES status bit in the SBR Service Request Enable Register SRER The SRER controls which bits in the SBR generate a service request Use the SRE command to set the SRER Use the SRE command to read it Queues The output queue is included with this Digital Storage Oscilloscope Output Queue This Digital Storage Oscilloscope sto
23. cture Registers Figure 5 1 A graphic represents the status registers and their connections STATus QUEStionable OPERation QUEue IDS 700 amp 800 Series Programming Manual CONDition ENABle CONDition ENABle EVENT EVENT EVENt Figure 5 2 STATus hierarchy of SCPI defined register To SBR Enable Register Condition Event Register Register Figure 5 3 Status registers and related commands The CONDition register is a read only register which monitors the present state of the instrument The CONDition register updates in real time and the inputs are not latched or buffered When a condition monitored by the CONDition register becomes true the bit for that condition also becomes true 1 When the condition is false the bit is 0 The read only EVENt register latches any false to true change in condition Once the bit in the EVENt register is set it is no longer affected by changes in the corresponding bit of the CONDition register The bit remains set until the controller reads it The command CLS Clear Status clears the EVENt registers QUEStionable Status Registers Table 5 1 shows the bit designations of the 16 bit QUEStionable Status Register Bit 3 Bit 2 IDS 700 amp 800 Series Programming Manual Table 5 1 QUEStionable Status Register OPERation Status Registers Table 5 2 shows the bit designations of the 16 bit OPERati
24. device for every 2 m of cable used Each device on the bus needs a unique device address No two devices can share the same device address Turn on at least two thirds of the devices on the GPIB system while you use the system Do not use loop or parallel structure for the topology of the GPIB system Notes for RS 232 Configuration This oscilloscope contains a DB 9 pin male RS 232 connector for serial communication with a computer or terminal The RS 232 interface of this oscilloscope is configured as an RS 232 Data Terminal Equipment so that data is sent from pin 3 and received on pin 2 For remote controls the RS 232 interface has to be connected with a computer or terminal Pin Assignments The pin assignments for RS 232 interface of the IDS 820 IDS 840 series are listed below IDS 700 amp 800 Series Programming Manual No connection Receive Data RxD input Transmit Data TxD output No connection Signal Ground GND No connection No connection No connection No connection O O1 B D Figure 1 1 Pin assignments for the IDS 820 s RS232 connector DB9 to DB9 Wiring The wiring configuration is used for computer with DB9 connectors that configured as Data Terminal Equipment Pin2 4 gt Pin2 Pin3 4 gt Pin3 Pin5 4 gt Pind Figure 1 2 DB9 to DB9 wiring IDS 700 amp 800 Series Programming Manual When the oscilloscope is set up with an
25. e ud0 prompt is no longer available 7 To exit Interactive control type q For the details please refer to National Instrument s manual If you do not receive a proper response from the IDS 820 IDS 840 please check the power is on the GPIB address is correct and all cable connections are active RS232 connection testing If you want to test whether the RS 232 connection is working or not you can send a command from computer For instance using a terminal program send the query command idn should return the Manufacturer model number serial number and firmware version in the following format RS IDS 820 P920130 V 1 09 If you do not receive a proper response from the oscilloscope please check if the power is on the RS 232 configurations are the same on both sides and all cable connections are active IDS 700 amp 800 Series Programming Manual 3 Remote Control s Commands The IDS 820 IDS 840 can be operated from computer via the GPIB port or RS 232 port The remote commands of IDS 820 IDS 840 are compatible with IEEE 488 2 and SCPI standards partially SCPI SCPI Standard Commands for Programmable Instruments is a standard created by an international consortium of the major test and measurement equipment manufacturers The IEEE 488 2 syntax has been adopted by SCPI to furnish common commands for the identical functions of different programmable instruments 5 SE 4 Common Command amp Qu
26. ents of the Standard Event Status Register SESR the Standard Event Status Register SESR and the Output Queue Standard Event Status Register SESR Table 5 4 shows the SESR Bit 7 Bit 6 Bit 4 Bit3 Bit2 Bit1 BitO EXE DDE QYE NU OPC Table 5 4 Standard Event Status Register SESR Bit 0 OPC Operation Complete shows that the operation is complete This bit is active when all pending operations are complete following an OPCcommand Bit 1 is always zero Bit 2 QYE Query Error indicates a command or query protocol error The bit 3 DDE Device Error shows that a device error occurred Bit 4 EXE Execution Error shows that an error occurred while the IDS 820 IDS 840 Digital storage oscilloscope was execution a command or query Bit 5 CME Command Error shows that an error occurred while theIDS 820 IDS 840 Digital storage oscilloscope was paring a command or query Bit 6 USR User Request is ignored here for the IDS 820 IDS 840 Bit 7 PON Power On shows that the IDS 820 IDS 840 Digital Storage Oscilloscope was powered on Use the ESR Query to read the SESR Reading the SESR clears the bits of the registers so that the register can accumulate information about new events IDS 700 amp 800 Series Programming Manual Enable Registers The enable registers determine whether certain events are reported to the Status Byte Register and SRQ The IDS 820 IDS 840 Digital Storage Os
27. eries mn Syntax amp Status Data Structure a hnterface Function DCBAABCD SCPI IEEE 488 1 SCPIIEEE 488 2 IEEE 488 2 Figure 3 1 the relationship between IEEE 488 1 IEEE 488 2 and SCPI As shown in the figure 3 1 the IEEE 488 1 standard is located at layer A and layer A belongs to the protocol of interface function on the GPIB bus The source handshake SH acceptor handshake AH and talker are included in this layer 10 interface functions in total At layer B the syntax and data structure are the essence of the entire IEEE 488 2 standard The syntax defines the function of the message communication which contain the lt PROGRAM MESSAGE gt or simply commands and lt RESPONSE MESSAGE gt The two kinds of messages represent the syntax format of a device command and return value The data structure is the foundation of IDS 700 amp 800 Series Programming Manual the status reporting which IEEE 488 2 standard have been defined The common commands and queries are included in layer C Commands and queries can be divided into two parts mandatory and optional Commands modify control settings or tell the instrument to perform a specific action Queries cause the instrument to send data or status information back to the computer A question mark at the end of a command identifies it as a query Layer D is interrelated with device information Different devices have different functions SCPI command sets belong
28. erred first Syntax IDS 700 amp 800 Series Programming Manual ACQuire lt X gt POINt Arguments lt X gt Specify the channel number 1 2 Returns The string of data is following Data size digit Data size Sample rate Channel indicator Waveform data size Waveform data Begin a transmission of data string Data size digit Indicate the digits of following data string amount 1 digit Data size the amount of current data string 4 digits Sample rate The corresponding sample rate of received waveform data 4 bytes The sample rate is indicated by a floating point format compatible with IEEE 754 standards Channel indicator Shows the channel which sent the waveform data Waveform data size The indicator of total amount of waveform data 4 bytes Waveform data The effective waveform data which covers 500 points 1000bytes in total Example Transfer the waveform data of channel 1 at 200us per division ACQuire1 POINt The IDS 820 IDS 840 should return the following messages Data size digit Sample rate 200us indicated by floating point format effective waveform data 1000 bytes totally 41008 0x48 0x43 0x50 0x00 0x01 0x00 0x01 OxF4 0x14 OxF4 a Begin a transmission Channel indicator Waveform data size indicator 500 points 1000 bytes of data string Data size 1008 bytes totally after here 1 gt Channel 1 2 gt Channel 2 AUToset Perform an au
29. ets the horizontal timebase scale per division SEC DIV Syntax TIMebase SCALe lt NR3 gt TIMebase SCALe Arguments Sec div NR3 Sec div NR3 Sec div NR3 25ms 25e 3 RARES IDS 700 amp 800 Series Programming Manual 50ms 50e 500ns 500e 2 5ms 2 5e 3 10s 10 1us 1e 6 5ms 5e 3 2 5us 2 5e 6 10ms 10e 3 lt NR3 gt is the desired timebase scale per division Returns lt NR3 gt Examples TIMebase SCALe 5e 3 sets timebase scale to 5ms per division TIMebase SWEep Selects the horizontal timebase sweep mode This command is equivalent to setting the horizontal menu Syntax TIMebase S WEep lt 011121314 gt TIMebase S WEep Arguments 0 Main timebase 1 Window 2 Window Zoom 3 Roll mode 4 XY mode Returns lt NR1 gt TIMebase WINDow DELay Set and query the zoomed area the grey coloured area for zoomed window display IDS 700 amp 800 Series Programming Manual Syntax TIMebase WINDow DELay lt NR3 gt TIMebase WINDow DELay Arguments lt NR3 gt is the desired position delay time Returns lt NR3 gt TIMebase WINDow SCALe Set and query the scale length of the zoomed window timebase Syntax TIMebase WINDow SCALe lt NR3 gt TIMebase WINDow SCALe Arguments lt NR3 gt is the desired scale length of the zoomed window timebase Returns lt NR3 gt TRIGger COUPIe Select and query the type of trigger
30. eturns lt NR1 gt TRIGger DELay TYPe Select and query the different delay trigger settings Syntax TRIGger ADVance TYPe lt 011 gt TRIGger ADVance TYPe Arguments 0 Time setting 1 Event setting Returns lt NR1 gt TRIGger FREQuency query only Return the readout value of the trigger frequency counter Syntax TRIGger FREQuency Returns lt NR3 gt TRIGger LEVel Select and query the trigger level IDS 700 amp 800 Series Programming Manual Syntax TRIGger LEVel lt NR3 gt TRIGger LEVel Arguments lt NR3 gt is the desired trigger level voltage Returns lt NR3 gt TRIGger MODe Select and query the trigger mode Syntax TRIGger MODe lt 0111213 gt TRIGger MODe Arguments 0 Auto Level 1 Auto 2 Normal 3 Single Returns lt NR1 gt TRIGger NREJ Switch and query the noise rejection mode Syntax TRIGger NREJ lt 011 gt TRIGger NREJ Arguments 0 OFF 1 ON Returns lt NR1 gt TRIGger PULSe MODe Switch and query different pulse trigger types Syntax TRIGger PULSe MODe lt 0111213 gt TRIGger PULSe MODe Arguments IDS 700 amp 800 Series Programming Manual O lt l gt 2 3 gt Returns lt NR1 gt TRIGger PULSe TIMe Select the time value for pulse width Syntax TRIGger PULSe TIMe lt NR3 gt TRIGger PULSe TIMe Arguments lt NR3 gt is the desired time value of the pulse width with the units is in seconds Returns lt NR3 gt
31. line IDS 700 amp 800 Series Programming Manual Entering Commands The standards that govern the command set for the IDS 820 IDS 840 allow for a certain amount of flexibility when you enter commands For instance you can abbreviate many commands or combine commands into one message that you send to the IDS 820 IDS 840 This flexibility called friendly listening saves programming time and makes the command set easier to remember and use Command Characters The IDS 820 IDS 840 is not sensitive to the case of command characters You can enter commands in either uppercase or lowercase You can precede any command with white space characters You must however use at least one space between the parameter and the command header Abbreviating Commands Most commands have a long form and a short form The listing for each command in this section shows the abbreviations in upper case For instance you can enter the query TIMebase SCALe simply as TIM SCAL Combining Commands You can use a semicolon to combine commands and queries The IDS 820 IDS 840 executes coherent commands in the order it receives them When you coherent queries the IDS 820 IDS 840 will combine the responses into a single response message For example if the frequency and amplitude of the signal are equal to 100kHz and 1V the command gt MEASure FREQuency MEASure VAMPlitude returns the message 100kHz 1v IDS 700 amp 800 Series
32. n last byte flag 1 enter end of string mode byte 0 udO Note If you type a command and no parameters Interactive Control prompts you for the necessary arguments If you already know the required arguments you can type them at the command prompt as follows ibdev 0 7 0 13 1 0 udO Note If you do not know the primary and secondary address of your GPIB instrument right click on your GPIB interface in Measurement amp Automation Explorer and select Scan for Instruments After Explorer scans your interface it displays your instrument address in the right window panel 3 After you successfully complete ibdev you have a ud prompt The new prompt udO represents a device level handle that you can use for further NI 488 2 calls To clear the device use ibclr as follows udO ibclr 0100 cmpl To write data to the device use ibwrt ud0 ibwrt IDN 0100 cmpl count 5 To read data from your device use ibrd The data that is read from theinstrument is displayed For example to read 28 bytes enter the following udO ibrd 28 0100 cmpl count 28 47 57 2C 20 47 4453 2D IDS 38 32 30 2C 20 50 39 32 820 P92 30 31 33 30 2C 20 56 2E 0130 V 31 2E 30 39 1 09 IDS 700 amp 800 Series Programming Manual 6 When you finish communicating with the device make sure you put it offline using the ibonl command as follows ud0 ibonl 0 0100 cmpl The ibonl command properly closes the device handle and th
33. on Status Register Table 5 2 OPERation Status Register NU not used Status Registers There are two status registers in the IDS 820 IDS 840 digital oscilloscope which are defined by IEEE 488 1 and IEEE 488 2 standards Status Byte Register SBR Standard Event Status Register SESR Status Byte Register SBR The SBR Table 5 3 summaries the status of all other registers and queue Bit7 Bit6 Bit5 OPER RQS ESB Table 5 3 Status Byte Register SBR IDS 700 amp 800 Series Programming Manual Bits 0 to bit 2 are not used these bits are always zero Bit 3 QUES QUEStionable is the summary bit for the QESR QUEStionable Event Status Register When this bit is high it indicates that status is enabled and present in the QESR Bit 4 MAV Message Available indicates that output is available in the output queue Bit 5 ESB Event Status Bit is the summary bit for the Standard Event Status Register SESR When this bit is high it indicates that status is enabled and present in the SESR Bit 6 RQS Request Service is obtained from a serial poll This bit shows that the IDS 820 IDS 840 Digital storage oscilloscope requests service from the GPIB controller Bit 7 OPER OPERation is the summary bit for the OESR OPERation EVENt STATus Register Use serial poll or the STB Query to read the contents of the SBR The bits in the SBR are set and cleared depending on the cont
34. pecific channel before implementing any measurement For explanation see MEASure SOURce MEASure VAVerage query only Return the average voltages Syntax MEASure VAVerage Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure VHI query only Return the value of the global high voltage IDS 700 amp 800 Series Programming Manual Syntax MEASure VHI Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure VLO query only Return the value of global low voltage Syntax MEASure VLO Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure VMAX query only Return the value of maximum amplitude Syntax MEASure VMAX Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure VMIN query only Return the value of minimum amplitude Syntax MEASure VMIN Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see IDS 700 amp 800 Series Programming Manual MEASure SOURce MEASure VPP query only Ret
35. range is from 1 313 for Odd frames 1 312 for even frames Returns lt NR1 gt TRIGger VIDeo POLarity Select and query the input video polarity Syntax TRIGger VIDeo POLarity lt 011 gt TRIGger VIDeo POLarity Arguments 0 Positive going sync pulses 1 Negative going sync pulses Returns lt NR1 gt TRIGger VIDeo TYPe Select and query the TV broadcast system Syntax TRIGger VIDeo TYPe lt 01112 gt TRIGger VIDeo TYPe Arguments O PAL I NTSC 2 SECAM Returns IDS 700 amp 800 Series Programming Manual lt NR1 gt WMEMory lt X gt DISPlay Select whether the stored waveform will be displayed after being saved Syntax gt WMEMory lt X gt DISPlay lt NRI gt WMEMory lt X gt DISPlay Arguments lt X gt Specify the location of RefA or RefB memory 1 2 0O OFF 1 ON Returns lt NR1 gt WMEMory lt X gt ERASe Select whether the stored waveform will be erased after being saved Syntax WMEMory lt X gt ERASe Arguments lt X gt Specify the location of RefA or RefB memory 1 2 WMEMory lt X gt LOCate Set the position of the stored waveform Syntax WMEMory lt X gt LOCate lt NRI gt Arguments lt X gt Specify the location of RefA or RefB memory 1 2 lt NRI gt is the desired position The rage is from 200 to 200 WMEMory lt X gt OFFSet After the WMEMory lt X gt LOCate command is specified you can adjust the position up or down by this command IDS 700
36. res query responses in the output queue by succeeding the IEEE 488 2 protocol If the Digital Storage Oscilloscope receives a lot of un read query data simultaneously the output buffer of the Digital Storage Oscilloscope will be repeatedly addressed and the output buffer will probably generate errors The computer must read a query response before it sends the next command or query or it loses response to earlier queries When an error or event occurs the output queue stores the message The output queue stores and reports the messages on a FIFO first in first out state IDS 700 amp 800 Series Programming Manual 6 Error Messages Table 6 1 lists the SCPI error messages for this digital storage oscilloscope Error Code SCPI Error Code Explanation Command error Syntax error Execution Error 220 Parameter error 221 Settings conflict 222 Data out of range Too much data 224 Illegal parameter value 232 Invalid format 7 Program Template for GPIB Filename IDS820ex1 c This is an example program written in C We use a NI s GPIB interface card and one X86 PC to control IDS 820 IDS 840 This program could get the waveform data from IDS 820 IDS 840 and save them to a file You can use Microsoft Visual C or Borland C Builder to compile this file And you must link this file with an object file BORLANDC_GPIB 32 OBJ for Borland C or GPIB 32 OB
37. to this layer Command Syntax If you want to transfer any of the instructions to an instrument and comply with SCPI there are three basic elements which must be included as follows Command header Parameter if required Message terminator or separator Command Header The command header has a hierarchical structure that can be represented by a command tree Figure 3 2 a a Root node DELay af Lower level nodes TIMe TYPe 0 Delay 1 event Leaf node Figure 3 2 Tree hierarchy The top level of the tree is the root level A root node is located at the root level A root node and one or more lower level nodes form a header path to the last node called the leaf node IDS 700 amp 800 Series Programming Manual The command header is configured by header path and leaf node Figure 3 3 shows the command header for the leaf node TRIGger DELay EVENt Root Node sep Header Path Leaf Node ie Y Command Header Figure 3 3 Command header Parameter If the command has parameters the values have to be included In this manual when we expressed the syntax of the command the lt gt symbols are used for enclosing the parameter type For instance the syntax of the command in Figure 8 5 includes the Boolean parameter type NOTE Do not include the lt gt or symbols when entering the actual value for a parameter TRIGger DELay MODe lt Boolean gt
38. tomatic setup in order to optimize the acquisition parameters Syntax AUToset CHANnel lt X gt BWLimit IDS 700 amp 800 Series Programming Manual Enable or disable the bandwidth limit function Syntax CHANnel lt X gt BWLimit Oll CHANnel lt X gt BWLimit Arguments lt X gt Specify the channel number 1 2 0 Disable bandwidth limit 1 Enable bandwidth limitReturns lt NR1 gt CHANhnel lt X gt COUPIing Select the different coupling states for IDS 820 IDS 840 Syntax CHANnel lt X gt COUPIing 01112 CHANnel lt X gt COUPling Arguments lt X gt Specify the channel number 112 0 Place scope in AC coupling state 1 Place scope in DC coupling state 2Place scope in grounding state Returns lt NR1 gt CHANhnel lt X gt DISPlay Enable or disable the channel s display Syntax CHANnel lt X gt DISPlay 011 CHANnel lt X gt DISPIay Arguments lt X gt Specify the channel number 1 2 0 Disable channel lt X gt display 1 Enable channel lt X gt display Returns lt NR1 gt IDS 700 amp 800 Series Programming Manual CHANnel lt X gt INVert Enable or disable the waveform invert function Syntax gt CHANnel lt X gt INVert 011 CHANnel lt X gt INVert Arguments lt X gt Specify the channel number 1 2 0 Disable invert function 1 Enable invert function Returns lt NR1 gt CHANnel lt X gt MATH Set the math expression Syntax gt CHANnel lt X gt MATH 0111213
39. troubleshoot problems by displaying the following information on your screen after you enter a command Results of the status word ibsta in hexadecimal notation Mnemonic constant of each bit set in ibsta Mnemonic value of the error variable iberr if an error exists the ERR bit is set in ibsta Count value for each read write or command function Data received from your instrument You can access online help in Interactive Control by entering help at the prompt or you can get help on a specific function by entering help lt function gt at the prompt where lt function gt is the name of the function for which you want help To start Interactive Control within National Instrument s Measurement amp Automation Explorer complete the following steps 1 Select Tools 488 2 Utilities Interactive Control 2 Open either a board handle or device handle to use for further NI 488 2 calls Use ibdev to open a device handle ibfind to open a board handle or the set 488 2 command to switch to a 488 2 prompt The following example uses ibdev to open a device assigns it to access board gpibO chooses a primary address of 7 with no secondary address sets a timeout of 10 seconds enables the END message and disables the EOS mode IDS 700 amp 800 Series Programming Manual ibdev enter board index 0 enter primary address 7 enter secondary address 0 enter timeout 13 enter EOI o
40. urn the value of Vmax minus Vmin Syntax MEASure VPP Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce MEASure VRMS query only Return the value of true Root Mean Square voltage Syntax MEASure VRMS Returns lt NR3 gt Note Please select the specific channel before implementing any measurement For explanation see MEASure SOURce PRINt Begin a hardcopy to a specified printer Syntax PRINt REFResh Refresh the waveform data of the LCD screen and re display the waveform data Syntax REFResh RUN Controls the RUN state of the trigger system The acquisition cycle will follow each qualified trigger in the RUN state Syntax IDS 700 amp 800 Series Programming Manual RUN STOP Controls the STOP state of the trigger system The acquisition cycle only triggered when the RUN command is received Syntax STOP SYSTem UNLock The front panel keyboard and knobs of IDS 820 IDS 840 will be disabled after any one of the remote control command are received Use this command in order to re activate the front panel keyboard and knobs Syntax SYSTem UNLock TIMebase DELay Sets the horizontal position delay timebase parameter Syntax TIMebase DELay lt NR3 gt TIMebase DELay Arguments lt NR3 gt is the desired delay time Returns lt NR3 gt TIMebase SCALe S
41. v ey Unlock IDS 820 IDS 840 IDS 700 amp 800 Series Programming Manual from remote control printf SYSTEM UNLOCK n r if ibsta amp ERR IIGbsta amp TIMO Showlbsta 1 return 0 ibonl Dev 0 Take the device offline return 1 void Acquire void short i J FILE writeP char writeFilename 15 wavedata txt short wave int tmp count 0 ibwrt Dev ACQUIRE1 POINT n 16L printf ACQUIRE1 POINT n r Delay 1000 if ibsta amp ERR ibsta amp TIMO ibcir Dev iowrt Dev CLS n 5L Showlbsta 1 Delay 100000 ibwrt Dev ACQUIRE1 POINT n 16L Try again printf ACQUIRE1 POINT n r if iosta amp ERR ibsta amp TIMO Showlbsta 1 Delay 100000 exit 1 while 1 ibrd Dev ReadBuffer 100 if ibsta amp ERR ibsta amp TIMO Showlbsta 0 Delay 100000 exit 1 for i 0 i lt ibcntl i IDS 700 amp 800 Series Programming Manual WaveBuf count ReadBuffer i printf rReceived 7d count if count gt 1014 printf rReceived 7d bytes n r count break Open file wavedata txt and write waveform datas to it writeP fopen writeFilename w if writeP NULL printf error cannot write s n writeFilename exit 1 j 14 for i 0 i lt 500 i wave WaveBuf j lt lt 8 wave WaveBuf j fprintf writeP d n wave tmp fclose writeP if tmp EOF
42. y SR1 Service Request The IDS 820 IDS 840 asserts the SRQ Service request line to notify the controller when it requires service RL1 Remote Local The IDS 820 IDS 840 responds to both the GTL Go to Local and LLO Local Lock Out interface messages PPO Parallel Poll The IDS 820 IDS 840 has no Parallel Poll interface function DC1 Device Clear The IDS 820 IDS 840 has Device clear capability to return the device to power on status DTO Device Trigger The IDS 820 IDS 840 has no Device Trigger interface function CO Controller The IDS 820 IDS 840 can not control other devices GPIB address setting To change the GPIB address use the following steps Press the UTILITY button on the front panel The utility menu provides Interface Menu sub menu by pressing the F2 soft key in which the GPIB sub menu IDS 700 amp 800 Series Programming Manual is included Press the F1 soft key to select the GPIB setting menu For GPIB sub menu Type GPIB Select GPIB port Addr 1 30 select the appropriate address for GPIB Previous Menu back to previous menu GPIB connection testing If you want to test the whether the GPIB connection is working or not use the National Instrument s Interactive Control utility for instance you communicate with the GPIB devices through calls you interactively type in at the keyboard The Interactive Control can help you to learn about the instrument and to
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