PSM3750-Comms
Contents
1. PSM3750 communications manual PROGRA PROGRA Function Identify program Description Reads the name of the last program to be loaded or recalled or a program is memory Format PROGRA NAME PROGRA NAME number PROGRA FILES Arguments number 0 999 Reply NAME text string FILES 1 text string per stored program number name date Example PROGRA NAME factory default Notes 2 75 PSM3750 communications manual RANGE RANGE Function Set channel ranging Description Select minimum range and range control for a given input channel Format RANGE channel ranging range Arguments channel CH1 CH2 ranging AUTO UPAUTO MANUAL range nominal range value Reply none Example RANGE CH2 MANUAL 3V Notes 2 76 PSM3750 communications manual RESOLU RESOLU Function Set the data resolution Description Data is returned in scientific format with exponent and mantissa The resolution of the mantissa may be selected to be 5 digit NORMAL or 6 digit HIGH Format RESOLU format Arguments format NORMAL 5 digit mantissa HIGH 6 digit mantissa BINARY raw binary format Reply none Example RESOLU HIGH Notes The resolution only changes the real number replies Data format for NORMAL s 1 2345E 00 Data format for HIGH is 1 23456E 00 The signs of the mantissa and exponent shown as in the above examples are only sent if they are negative Data format for BINARY is2. E Newtons4th Ltd PSM3750 NumetriQ COMMUNICATIONS MANUAL PSM3750 communications manual IMPORTANT SAFETY INSTRUCTIONS This equipment is designed to comply with BSEN 61010 1 Safety requirements for electrical equipment for measurement control and laboratory use observe the following precautions e This appliance must be earthed Ensure that the instrument is powered from a properly grounded supply e The input connectors are High Voltage safety types for use up to 500V peak input from earth overvoltage category II Do not exceed 500V peak on any input connection Only use test leads that are fitted with approved High Voltage safety connectors when working with hazardous voltages e The inputs must not be connected to signals greater than is indicated on the front panel e Keep the ventilation holes on the underneath and sides free from obstruction e Do not operate or store under conditions where condensation may occur or where conducting debris may enter the case e There are no user serviceable parts inside the instrument do not attempt to open the instrument refer service to the manufacturer or his appointed agent Note Newtons4th Ltd shall not be liable for any consequential damages losses costs or expenses arising from the use or misuse of this product however caused PSM3750 communications manual ABOUT THIS MANUAL This manual gives details of the communication commands recognized by the
3. LOWFRE LOWFRE Function Set low frequency mode Description Sets the low frequency option for external frequency measurement Format LOWFRE value Arguments value ON OFF Reply none Example LOWFRE ON Notes LOWFRE is mainly used for measuring low frequencies when not using the instrument generator for the frequency reference However as it applies digital filtering it may also be useful when analysing any signals below a few hundred Hertz 2 56 PSM3750 communications manual MARKER MARKER Function Set frequency marker Description Enable or disable frequency marker Format MARKER value frequency Arguments value ON OFF frequency marker frequency in Hz Reply none Example MARKER OFF MARKER ON 25e3 Notes It is not necessary to send the frequency when enabling the marker if it has already been set 2 57 PSM3750 communications manual MODE MODE Function Set mode Description Sets the fundamental operating mode of the instrument Format MODE type Arguments type VRMS rms voltmeter GAINPH gain phase analyser VECTOR vector voltmeter POWER power meter LCR LCR meter HARMON harmonic analyser SCOPE oscilloscope Reply none Example MODE GAINPH Notes MODE sets the measurement mode of the instrument 2 58 PSM3750 communications manual MULTIL MULTIL Function Selects data for multi string reply Description Selects data values across phases and functions that can be read i
4. BANDWI Function Description Format Arguments Reply Example Notes 2 28 PSM3750 communications manual BANDWI Select bandwidth or selective heterodyning measurements Selective measurement automatically starts at around 10kHz for those functions that support it It can be disabled by forcing the bandwidth to wide For low noise measurements at low frequency the bandwidth can be restricted to low BANDWI type type AUTO WIDE LOW none BANDWI WIDE In wide bandwidth mode the frequency range is limited to 5MHz In low bandwidth mode the frequency is restricted to 30kHz PSM3750 communications manual BEEP BEEP Function Sound the buzzer Description Makes a beep from the instrument Format BEEP Arguments none Reply none Example BEEP Notes 2 29 PSM3750 communications manual BLANKI BLANKI Function Select blanking Description Enable or disable low value blanking Format BLANKI value Arguments value ON OFF Reply none Example BLANKI OFF Notes 2 30 PSM3750 communications manual CONFIG CONFIG Function Direct access of configuration parameters Description Sets configuration parameter for which there may not be a direct command Format CONFIG index data Arguments index is the number of the parameter data is the data for that parameter Reply none Example CONFIG 6 1 set phase convention Notes The list of configurable paramete
5. Example FREQ 3300 OUTPUT ON PAV data returned Notes PAV waits for next unread data PAV SWEEP does not wait for new data data can be read multiple times PAV and VECTOR are aliases for the same command 2 67 PSM3750 communications manual PHASEM PHASEM Function Set phase meter mode Description Select phase meter mode Format PHASEM Arguments as FRA Reply none Example PHASEM Notes PHASEM is an alias for FRA to support early instruments 2 68 PSM3750 communications manual PHASEM PHASEM Function Phase meter query Description Reads phase meter results Format PHASE Arguments none Reply as FRA Example PHASE Data returned Notes PHASEM is an alias for FRA to support early instruments 2 69 PSM3750 communications manual PHCONV PHCONV Function Set phase convention Description Set phase convention Format PHCONV convention Arguments convention 180 180 to 180 360 0 to 360 360 0 to 360 Reply none Example PHCONV 360 Notes 2 70 PSM3750 communications manual PHREF PHREF Function Set phase reference Description Select measurement of phase as CH2 relative to CH1 or as CH1 relative to CH2 Format PHREF channel Arguments channel CH1 phase ch2 wrt chl CH2 phase ch1 wrt ch2 Reply none Example PHREF CH2 Notes This parameter influences the phase meter mode and the phase angle voltmeter mode 2 71 POWER Function Descrip
6. OUTPUT ON TFA FSWEEP 20 10 20E3 START DAV 3 DAV 15 TFA SWEEP data returned Notes FRA GAINPH TFA are aliases for the same command 2 95 PSM3750 communications manual USER USER Function Read the user data Description Returns up to 3 lines of user data Format USER Arguments none Reply 3 lines of ASCII terminated by CR Example USER Newtons4th Ltd R amp D department PSM3750 4 Notes 2 96 PSM3750 communications manual VARCON VARCON Function Set VAr sign convention Description Fundamental VAr measurement is given a sign depending convention either negative if lagging current negative if leading current Format VARCON type Arguments type NEGLAG NEGLEA Reply none Example VARCON NEGLAG Notes An inductive load would have a lagging current a capacitive load would have a leading current The sign given to power factor can be independently set see PFCONV 2 97 PSM3750 communications manual VECTOR VECTOR Function Set vector voltmeter mode Description Set vector voltmeter mode and parameter Format VECTOR parameter lvdt scale Arguments As PAV Reply none Example VECTOR LVDT D 0 1 Notes PAV and VECTOR are aliases for the same command 2 98 PSM3750 communications manual VECTOR VECTOR Function Vector voltmeter query Description Read vector voltmeter results Format VECTOR or VECTOR SWEEP Arguments none or SWEEP Reply As PAV Ex
7. PSM3750 instrument over RS232 USB LAN or GPIB For more general operating instructions for the instrument refer to the specific user manual Each command is listed alphabetically with details of any arguments and reply A one line summary of each command is given in the appendix Although most of the commands apply to all instruments in the range there are some commands that are specific to one instrument or another The information in this manual is believed to be accurate and complete but Newtons4th Ltd cannot accept any liability whatsoever for any consequential damage or losses arising from any errors inaccuracies or omissions Revision 1 12 This manual is copyright O 2012 2013 Newtons4th Ltd and all rights are reserved No part may be copied or reproduced in any form without prior written consent 10 September 2013 1 PSM3750 communications manual CONTENTS Using remote control tocarlo abad da 1 1 Standard event status register 1 2 Serial Poll status byte rener 1 3 RS232 connections rca rai FREQUE si cct ch E ea E E ap PSM3750 communications manual GAIN PR Essaie mime Mdr Mt 2 47 HARMON ias 2 49 A re reset oies CEATA rare 2 51 UE PRE die aaa 2 52 KEY BOA ist mena a mtn wie mena en dd 2 53 ER 2 54 LOW FRE is 2 data 2 56 MARKER io EE eee ame are dire raie oan eles oser aie 2 57 MODE enr ai 2 58 MUE TIE 2 eee ec lc nce a sce ada cat 2 59 MU iQ FR Ear er
8. a i 2 60 NEWLOE 2000 anios 2 61 NOOVBER sti coca 2 62 PEC ON Vat E ar 2 63 OFES E MR O A EA DA nine 2 64 OUTPUT orisii e A 2 65 PAM 2 66 PHASE Mtra tooo rc 2 68 PACON Wifi tea TI TI TRANS RENE M TAN TAN LE 2 70 PARE ois atelier lav cee crt ea ee ie ame in ned tien 2 71 POWER ics toa Street eme nue 2 72 PROGRA AA 2 74 RANGE Msi UE SRE AN Re A As nn ct tn ne adt 2 76 RESOLU rada 2 77 RESULT aid Re ee E eat eae 2 78 REZERO caia nd near ensure 2 80 SCALE Se Reno UE a retin oe a i NO te GOR ne nets 2 81 SCOPE taa ne nn nee PE EP ne OT TE nine es 2 82 SCREEN To ER pr ae naine 2 83 SE UP o nn Pen E 2 84 SETUP nine ns A A A en 2 85 SAONE er AA 2 86 SMOOTH aard a ER DE EDEL EDEL ene 2 87 SPEED HEE O 2 88 STAR got nig wrested wane sees mae A NA ra Es 2 89 STATUS tt een nn eee ees 2 90 STOP sen RS et nt 2 91 SUSPENDUE A Rs Au Ste nn ne ie dns Rs Ne Ans un 2 92 TAGREP nn der need ee Did te 2 93 A nn ESSENS TESS ner er eee 2 94 US ER annee O IA 2 96 VARCON sn ED ED ELSE SEEDEDE nt 2 97 VECTOR iio 2 98 VERSIOT a A a ea ao 2 100 PSM3750 communications manual O tata Me Re M ee 2 101 WAV ERO ie 2 103 VERENG TORERO PE evonecten estennter AEO ENTON ENTA VAA REATOR ATAT extoamtuet 2 104 ZERO A taster Rene Rene en eee da els 2 105 ZOO Mica sement net nd 2 106 PSM3750 communications manual 1 Using remote control The instrument is fitted with an RS232 serial communications port as standard and may have an EEE488 GPIB interface or
9. a proprietary floating point format which returns raw data in a minimum number of data bytes 2 77 RESULT Function Description Format Arguments Reply Example Notes 2 78 PSM3750 communications manual RESULT Access non volatile result stores Recall store or delete non volatile result RESULT function number function RECALL STORE DELETE number 0 999 none RESULT RECALL 13 PSM3750 communications manual RESULT RESULT Function Identify available results Description Reads the name of the stored results Format RESULT NAME number RESULT FILES Arguments number 0 999 Reply NAME text string FILES 1 text string per stored result number name date Example RESULT NAME 13 PSU stability sweep 3 Notes 2 79 PSM3750 communications manual REZERO REZERO Function Rezero front end Description Request the DSP to re compensate for dc offset and compute a new autozero Format REZERO Arguments none Reply none Example REZERO Notes 2 80 PSM3750 communications manual SCALE SCALE Function Set channel scale factor Description Set a multiplying scale factor for a given input channel Format SCALE channel factor Arguments channel CH1 CH2 CH3 factor multiplying scale factor Reply none Example SCALE CH2 10 Notes 2 81 PSM3750 communications manual SCOPE SCOPE Function Fetch raw scope data Description Read back raw os
10. available Notes DAV does not modify the status bits 2 37 PSM3750 communications manual DAVER DAVER Function Set data available enable register Description Sets bits in the data available enable register to control which status bits set the data available bits in the status byte Format DAVER value Arguments decimal equivalent of data available bits bitO set bit O of status byte when new data available bitl set bit O of status byte when data available bit2 set bit 1 of status byte when new full sweep data available bit3 set bit 1 of status byte when sweep data available Reply none Example DAVER 4 set bit 1 in status byte only when full sweep data is ready Notes default value is 6 bit O of status byte is set whenever data is available bit 1 of status byte is set when full sweep data is available 2 38 PSM3750 communications manual DAVER DAVER Function Read data available enable register Description Read back present setting of the data available enable register which controls the status bits that set the data available bits in the status byte Format DAVER Arguments none Reply decimal equivalent of bits Example DAVER 4 Notes 2 39 PSM3750 communications manual DELAY DELAY Function Set a delay time between frequency points Description Applies a settling time when changing frequency for systems which need some settling time after the frequency changes before a mea
11. bits in the status byte Format ALARME value Arguments decimal equivalent of alarm bits bit2 set bit 3 of status byte when alarm 1 is active bit3 set bit 3 of status byte when alarm 2 is active Reply none Example ALARME 12 SRE 8 set bit 3 in status byte when either alarm 1 or alarm 2 is active and generate a service request Notes default value is O 2 24 PSM3750 communications manual ALARME ALARME Function Read alarm status enable register Description Read back present bits in the alarm status enable register which controls the alarm active bit in the status byte Format ALARME Arguments none Reply decimal equivalent of alarm bits Example ALARME 12 Notes 2 25 PSM3750 communications manual AMPLIT AMPLIT Function Set output amplitude Description Sets the output amplitude in Volts or dBm for the generator Format AMPLIT amplitude Arguments peak amplitude in Volts or amplitude in dBm Reply none Example AMPLIT 0 5 set peak amplitude to 0 5V Notes dBm mode is selected by OUTPUT DBM 2 26 PSM3750 communications manual AUXI LI AUXI LI Function Controls the auxiliary device Description Controls the auxiliary device connected to the extension port Format AUXILI device value Arguments device AI value LOW NORMAL HIGH VHIGH Reply None Example AUXI LI AI HIGH Notes Arguments will be extended to include other auxiliary devices as they become available 2 27
12. execution error bit 5 CME command interpretation error bit 7 PON power on event For example ESE 60 enables all the error bits so that the ESB bit in the serial poll status byte is set in the event of any error 2 7 PSM3750 communications manual ESR ESR Function Standard event status register query Description Returns the contents of the standard event status register and clears it Format ESR Arguments none Reply decimal equivalent of bits in standard event status register Example ESR 33 Notes The following bits in the standard event status register have been implemented bit O OPC operation complete bit 2 QYE unterminated query error bit 3 DDE device dependent error bit 4 EXE execution error bit 5 CME command interpretation error bit 7 PON power on event For example if a command is sent incorrectly and is not recognised the CME bit will be set and the value of 33 will be returned 2 8 PSM3750 communications manual DN DN Function Identify query Description Returns a standard format identification string Format I DN Arguments none Reply An ASCII string in the IEEE488 2 format manufacturer model serial no version Example I DN NEWTONS4TH PSM3750 01234 1 00 Notes 2 9 OPC Function Description Format Arguments Reply Example Notes 2 10 PSM3750 communications manual OPC Test for ope
13. LAN interface fitted as an option All the interfaces use the same ASCII protocol with the exception of the end of line terminators Rx expects Tx sends RS232 Carriage return carriage return LAN USB line feed ignored and line feed EEE488 carriage return or carriage return line feed or EOI with EOI All the functions of the instrument can be programmed via either interface and results read back When the IEEE488 interface is set to remote the RS232 port is ignored The commands are not case sensitive and white space characters are ignored e g tabs and spaces Replies from the instrument are always upper case delimited by commas without spaces Only the first six characters of any command are important any further characters will be ignored For example the command to set the generator frequency is FREQUE but the full word FREQUENCY may be sent as the redundant NCY at the end will be ignored Fields within a command are delimited by comma multiple commands can be sent on one line delimited with a semi colon Eg AMPLIT 1 5 OUTPUT ON Mandatory commands specified in the EEE488 2 protocol have been implemented e g IDN RST and all commands that expect a reply query commands are terminated with a question mark 1 1 PSM3750 communications manual The instrument maintains an error status byte consistent with the requirements of the IEEE488 2 protocol called the standard ev
14. PHASE STREAM 0 01 START read data values as required STOP read remaining data values Notes 2 91 PSM3750 communications manual SUSPEND SUSPEND Function Suspend data acquisition Description Suspends the background data acquisition to maximise the communications speed Format SUSPEND command Arguments command OFF ON Reply none Example DATALOG NONVOL 36 START wait for datalog STOP SUSPEND ON DATALOG data data data data SUSPEND OFF Notes 2 92 PSM3750 communications manual TAGREP TAGREP Function Set up a reply tag Description Select a reply tag to identify the instrument in a multi instrument environment Format TAGREP on off Arguments on off ON OFF Reply none Example TAGREP ON ESR PPA5530 00635 1 Notes When tag reply is turned on every reply string has a prefix of an identification string comprising the model and serial number 2 93 PSM3750 communications manual TFA TFA Function Set transfer function analyser mode Description Set transfer function analyser mode Format TFA Arguments Reply none Example TFA Notes This command has the same effect as MODE GAINPH FRA GAINPH TFA are aliases for the same command 2 94 PSM3750 communications manual TFA TFA Function transfer function analyser query Description Read transfer function analyser results Format TFA or TFA SWEEP Arguments none or SWEEP Reply As for FRA Example
15. Sets harmonic analyser mode if not already set Waits for next unread data if necessary Clears new data available bit read by DAV HARMON HARMON SWEEP HARMON SERIES none or SWEEP or SERIES 7 data values separated by commas freq mag1 mag2 h1 h2 harm1 harm2 freq mag1 mag2 thd1 thd2 harm1 harm2 1 line per result for sweep data 6 data values separated by commas magl1 1 phasel mag2 2 phase2 HARMON data returned HARMON waits for next unread data HARMON SWEEP does not wait for new data data can be read multiple times PSM3750 communications manual HOLD HOLD Function Set clear HOLD mode Description HOLD mode stops the instrument from updating the measured values Format HOLD value Arguments value ON OFF Reply none Example HOLD ON Notes 2 51 PSM3750 communications manual INPUT INPUT Function Set input mode Description Selects the input type of the instrument Format INPUT channel type Arguments channel CH1 CH2 CH3 type VOLTAGE CURRENT Reply None Example INPUT CH1 CURRENT SHUNT CH1 0 1 Notes Current input needs an external shunt 2 52 PSM3750 communications manual KEYBOA KEYBOA Function Disable front panel keyboard Description The front panel keyboard can be disabled to prevent accidental operation Format KEYBOARD value Arguments value ENABLE DISABLE Reply none Example KEYBOARD DISABLE Notes The keyboard can be re enabled from the front panel only by
16. TS out 8 CTS in 9 RI not used The instrument will only transmit when CTS pin 8 is asserted and can only receive if DCD pin 1 is asserted The instrument constantly asserts 12V DTR pin 4 so this pin can be connected to any unwanted modem control inputs to force operation without handshaking The instrument has a weak pull up on pin 1 as many null modem cables leave it open circuit In electrically noisy environments this pin should be driven or connected to pin 4 To connect the instrument to a PC use a 9 pin female to 9 pin female null modem cable 1 amp 6 4 2 3 3 2 4 1 amp 6 5 5 7 8 8 7 1 5 PSM3750 communications manual 2 Communication commands CLS CLS Function Clear status Description Clears the standard event status register Format CLS Arguments none Reply none Example CLS ESR 0 Notes 2 6 PSM3750 communications manual ESE ESE Function Set standard event status enable register Description Enable which bits of the standard event status register set the ESB bit in the serial poll status byte Format ESE value Arguments decimal equivalent of bits in standard event status enable register Reply can be read by ESE Example ESE 60 Notes The following bits in the standard event status enable register have been implemented bit O OPC operation complete bit 2 QYE unterminated query error bit 3 DDE device dependent error bit 4 EXE
17. ample FREQ 3300 OUTPUT ON VECTOR data returned Notes PAV and VECTOR are aliases for the same command 2 99 PSM3750 communications manual VERSI O VERSI O Function Read the instrument code versions Description Returns an ASCII string with the details of the various parts of the instrument firmware Format VERSIO Arguments none Reply date code type cpu dsp fpga boot Examples VERSION PQ3504 1 1 12 1 12 1 01 2 01 Notes This data can be displayed on the screen by pressing SYSTEM then BACK 2 100 PSM3750 communications manual VRMS VRMS Function Set up rms voltmeter Description Set mode to rms voltmeter Format VRMS Arguments none Reply none Examples VRMS Notes This has the same effect as MODE VRMS 2 101 PSM3750 communications manual VRMS VRMS Function Read true rms voltmeter results Description Reads back latest voltmeter results Sets voltmeter mode if not already set Waits for next unread data if necessary Clears new data available bit read by DAV Format VRMS or VRMS results Arguments results RMS SURGE Reply RMS 8 data values separated by commas rms1 2 dc1 2 ac1 2 dbm1 2 SURGE 6 data values separated by commas pk1 2 cf1 2 surgel 2 no argument 14 data values separated by commas RMS results then SURGE Example VRMS RMS Notes As VRMS does not send the same data twice but waits instead for the next result it is not necessary to check th
18. are only updated when the 16 line has been received and the checksum has been verified 2 84 PSM3750 communications manual SETUP SETUP Function Read instrument set up Description All the settings within the instrument may be read by SETUP The same settings may then be stored by ending the same data back to the instrument As it sends all settings in a compressed format it is quicker than setting individual parameters Format SETUP Arguments none Reply 16 lines of ASCII data Example SETUP Read 16 lines of data Notes 2 85 PSM3750 communications manual SHUNT SHUNT Function Set channel shunt value Description Set the resistance factor of a current shunt to be divided into the measured voltage for a given input channel Format SHUNT channel resistance Arguments channel CH1 CH2 CH3 resistance shunt resistance in Ohms Reply none Example SHUNT CH1 10 Notes The SHUNT command is still accepted if the channel has not been configured for current The value stored will be used when the channel is configured for current 2 86 PSM3750 communications manual SMOOTH SMOOTH Function Select the smoothing Description Sets the filter time constant and dynamic response Format SMOOTH type dynamics Arguments type NONE NORMAL SLOW dynamics AUTO FIXED Reply none Example SMOOTH NORMAL FIXED SMOOTH NONE Notes It is not necessary to send both parameters if it is only re
19. ce phase R L C series R L C parallel tans Q reactance freq magl mag2 impedance phase resistance reactance admittance phase conductance susceptance n lines of data freq QF tand impedance phase L C R freq QF tand admittance phase L C R up to 60 floating point values freq mag1 mag2 parameter phase a b n lines of VECTOR data same as FRA A 3 PSM3750 communications manual PHREF channel POWER integration type POWER WATTS POWER RMS POWER INTEGR PROGRAM function number PROGRAM RANGE ch ranging range RESOLU format RESULT function number RESULT REZERO SCALE channel factor SCALE channel SCOPE channel SCREEN SETUP index data SETUP SHUNT channel resistance SHUNT channel SMOOTH type dynamics SPEED speed START STATUS channel STOP SUSPEND on off TAGREP on off TFA TFA TFA SWEEP USER VARCON type VECTOR parameter scaling VECTOR VECTOR SWEEP VERSION VRMS VRMS VRMS RMS VRMS SURGE WAVEFO type WIRING type ZERO ZERO DELETE A 4 W W f VA VA f pf pf f Vdc W h freq rms1 rms2 dc1 dc2 fnd1 fnd2 41 42 Wh Wh f VAh VAh f pf pf f Ah Ah f t CR terminated text string CR terminated text string single real data value 252 signed integers 240 lines of 40 bytes 16 lines of ASCII data single real data value range number range text over low ok freq mag1 mag2 dB phase delay n lines of TFA data 3 CR terminat
20. cilloscope data Format SCOPE channel SCOPE phase channel Arguments phase PHASE1 PHASE2 PHASE3 NEUTRA channel VOLTAGE CURRENT Reply 252 signed integers range trigger 250 x data Example HOLD ON SCOPE PHASE1 VOLTAGE read data SCOPE PHASE2 VOLTAGE read data SCOPE PHASE3 VOLTAGE read data HOLD OFF Notes 2 82 PSM3750 communications manual SCREEN SCREEN Function Read the screen data Description Returns a bit map of screen pixel display in ascii and hex format Format SCREEN Arguments none Reply Multiple data bit values Example SCREEN data returned Notes SCREEN response ASCII coded Hex 2 characters for each byte 240 lines of 40 bytes each line represents one line of the display preceded by H Each byte represents 8 dots where the Isb is the leftmost dot of the display The bit is set for on and cleared for off PSM3750 communications manual SETUP SETUP Function Upload instrument set up Description All the settings within the instrument may be read by SETUP The same settings may then be stored by ending the same data back to the instrument As it sends all settings in a compressed format it is quicker than setting individual parameters Format SETUP index data Arguments index 0 15 data ASCII hex as returned by SETUP Reply none Example SETUP Read 16 lines of data SETUP 00 data00 SETUP 01 data01 SETUP 15 data15 Notes The settings
21. d 2 alarms Format ALARM Arguments none Reply single integer bit O data available bit 1 data error bit 2 alarm 1 bit 3 alarm 2 Example ALARM 1 Notes An alarm is present if bit O is high data is available and either alarm 1 or alarm 2 bits are high 2 21 PSM3750 communications manual ALARM1 ALARM1 Function Set parameters for alarm1 Description Set alarm1 type and thresholds Format ALARM1 DISABLED ALARM1 type data high low Arguments type HIGH LOW INSIDE OUTSIDE LINEAR data 1 4 high high threshold low low threshold Reply None Example ALARM1 HIGH 1 2 0 ALARM1 DISABLED Notes DISABLED does not have any further arguments otherwise both thresholds must be sent even if only one is used 2 22 PSM3750 communications manual ALARM2 ALARM2 Function Set parameters for alarm2 Description Set alarm2 type and thresholds Format ALARM2 DISABLED ALARM2 type data high low Arguments type HIGH LOW INSIDE OUTSIDE data 1 4 for zoom data high high threshold low low threshold Reply None Example ALARM2 LOW 3 0 0 5 Notes DISABLED does not have any further arguments otherwise both thresholds must be sent even if only one is used There is no LINEAR option for alarm 2 2 23 PSM3750 communications manual ALARME ALARME Function Set alarm status enable register Description Sets bits in the alarm status enable register to control which alarm bit if any set the alarm active
22. e data available bits before sending the VRMS command 2 102 PSM3750 communications manual WAVEFO WAVEFO Function Set the output waveform Description Selects the output waveform for the signal generator Format WAVEFO type Arguments type SINEWAVE SQUARE TRIANGLE SAWTOOTH PULSE WHITENOISE Reply None Example FREQUE 500 WAVEFO TRIANG triangle wave OUTPUT ON Notes 2 103 PSM3750 communications manual WIRING WIRING Function Set the wiring configuration Description Selects 2 channel or 3 channel operation Format WIRING type Arguments type CH2 CH3 Reply None Example WIRING CH3 Notes 2 104 PSM3750 communications manual ZERO Function Description Format LCR compensation Arguments Reply Example Notes ZERO Apply or remove the zero Applies or removes a zero function depending on the measurement mode same as pressing ZERO key Performs lead compensation in LCR mode ZERO ZERO DELETE ZERO DB offset ZERO PHASE offset ZERO SINGLE ZERO SWEEP steps start finish ZERO OPEN ZERO SHORT ZERO STORE ZERO RECALL offset offset value steps LCR sweep compensation steps start LCR compensation start frequency stop LCR compensation stop frequency none ZERO SWEEP 100 1e3 1e6 ZERO OPEN performs open circuit compensation 2 105 PSM3750 communications manual ZOOM ZOOM Function Sets the display zoom parameters Description Sets the zoo
23. e sweep is specified in the OUTPUT command 2 46 PSM3750 communications manual GAI NPH GAI NPH Function Set gain phase analyser mode Description Set gain phase analyser mode Format GAI NPH Arguments Reply none Example GAI NPH Notes This command has the same effect as MODE GAI NPH FRA GAINPH TFA are aliases for the same command 2 47 PSM3750 communications manual GAI NPH GAI NPH Function Gain phase query Description Read gain phase analyser results Format GAINPH or GAINPH SWEEP Arguments none or SWEEP Reply See FRA Example OUTPUT ON GAINPH FSWEEP 20 10 20E3 START DAV 3 DAV 15 GAINPH SWEEP data returned Notes GAINPH is the same as FRA 2 48 PSM3750 communications manual HARMON HARMON Function Set harmonic analyser mode Description Set harmonic analyser mode and parameters Format HARMON scan parameter harmonic max Arguments scan SINGLE THDD THDS parameter PERCEN DB harmonic single harmonic 2 100 for display max harmonic series 2 100 for series thd Reply none Example HARMON SINGLE PERCEN 3 Notes It is not necessary to send any arguments but if any are sent they must be in the specified order 2 49 HARMON Function Description Format or or Arguments Reply single thd series Example Notes 2 50 PSM3750 communications manual HARMON Harmonic analyser query Read harmonic results
24. ed text strings freq magl1 mag2 parameter phase a b n lines of VECTOR data datecode type cpu dsp fpga boot RMS data followed by SURGE rms1 rms2 dc1 dc2 ac1 ac2 db1 db2 pk1 pk2 cf1 cf2 surgel surge2 PSM3750 communications manual ZOOM level d1 d2 d3 d4 ZOOM level d1 d2 d3 d4 A 5 PSM3750 communications manual calibration commands CALAPP CALAUX string CALCOM freq CALDCO value CALFIL index value CALFIL CALFRQ index freq CALFRQ CALIAI freg res reac CALIBR index value CALIBR CALIDS string CALIDS CALOUT index value CALPHA index CALRES CALSAV password CALSNO serial number CALSTR string CALSTR A 6 six real data values seven real data values single integer data value string string PSM3750 communications manual Appendix B Configurable parameters All parameters can be accessed using the CONFIG command CONFIG number parameter CONFIG parameter data Number Function Parameter System parameters 1 Operating mode Sets main mode O RMS Voltmeter 1 Frequency Response analyser 2 Power Meter 3 LCR Meter 4 Harmonic Analyser 5 Vector Voltmeter 6 Oscilloscope 2 Language System Options if installed O English 1 Other if installed 3 Bandwidth Acquisition Control O Auto 1 Wide 4 Autozero System Options O Auto 1 Manual 5 Low blanking System Options RMS Voltmeter 0 Off 1 On 6 Phase convention System Options 0 180 to 180 1 0
25. ent status register that can be read by the mandatory command ESR see section 5 1 The instrument also maintains a status byte consistent with the requirements of the EEE488 2 protocol that can be read either with the 1EEE488 serial poll function or by the mandatory command STB over RS232 or IEEE or LAN see section 5 2 The IEEE address defaults to 23 and can be changed via the COMMS menu The keyboard is disabled when the instrument is set to remote using the IEEE Press HOME to return to local operation RS232 data format is start bit 8 data bits no parity 1 stop bit Flow control is RTS CTS see section 5 2 baud rate is selectable via the COMMS menu A summary of the available commands is given in the Appendix Details of each command are given in the communication command section of the manual Commands are executed in sequence except for two special characters that are immediately obeyed Control T 20 reset interface device clear Control U 21 warm restart 1 2 PSM3750 communications manual 1 1 Standard event status register PON CME EXE DDE QYE OPC bit O OPC operation complete cleared by most commands set when data available or sweep complete bit 2 QYE unterminated query error set if no message ready when data read bit 3 DDE device dependent error set when the instrument has an error bit 4 EXE execution error set when the command ca
26. example the query command GAINPH SWEEP can be sent immediately after the WAI command and the sweep data will be returned as soon as the sweep has completed 2 17 PSM3750 communications manual ABORT ABORT Function Abort sweep Description Abort an active sweep Format ABORT Arguments none Reply none Example FSWEEP 50 1000 1e6 OUTPUT ON START ABORT Notes 2 18 PSM3750 communications manual ACTRIM ACTRIM Function Set ac control parameters Description Sets the specified signal level tolerance and input channel for the ac control amplitude compression Format ACTRIM channel level tolerance Arguments channel DISABL CH1 CH2 CH3 level required ac level in V or A or dBm tolerance required accuracy in percent Reply none Example ACTRIM CH1 1 0 5 1 0V 5 Notes The level should be set in dBm if dBm mode is selected OUTPUT DBM It is not necessary to send all the arguments but those that are sent must be in the correct sequence 2 19 ALARM Function Description Format Arguments Reply Example Notes 2 20 PSM3750 communications manual ALARM Set common controls for alarml and alarm2 Set the alarm latch and sounder control ALARM latch sounder latch ON OFF sounder ENABLED DISABLED none ALARM ON DISABLED PSM3750 communications manual ALARM ALARM Function Read alarm status Description Reads the status of the measurements an
27. gures IEEE address Comms Remote options interface GPIB Enter figures Interface Comms Remote options O RS232 1 LAN 2 GPIB Alarm functions Monitor 1 Monitor 1 data Alarm monitor options 0 Zooml 1 Zoom2 2 Zoom3 3 Zoom4 Alarm type Alarm monitor options O Disabled 1 Linear 2 Alarm if high 3 Alarm if low 4 Outside window 5 nside window High threshold Alarm type Alarm monitor options Enter figures low threshold Alarm type Alarm monitor options Enter B 9 PSM3750 communications manual figures 160 Alarm latch Alarm type Alarm monitor options 0 0ff 1 0n 161 Alarm sounder Alarm type Alarm monitor options O Enabled 1 Disabled Alarm functions Monitor 2 167 Monitor 2 data Alarm monitor options 0 Zooml 1 Zoom2 2 Zoom3 3 Zoom4 168 Alarm 2 type Alarm monitor options O Disabled 1 Linear 2 Alarm if high 3 Alarm if low 4 Outside window 5 nside window 169 High threshold Alarm type Alarm monitor options Enter figures 170 Low threshold Alarm type Alarm monitor options Enter figures Graph functions 173 Graph 2 scaling Sweep control 0 Auto 1 Manual 174 Upper limit Graph 2 scaling Sweep control Enter figures 175 Lower limit Graph 2 scaling Sweep control Enter figures B 10 177 178 179 180 181 186 188 190 192 PSM3750 communications manual Phase angle voltmeter parameters Parameter Vector voltmeter O In phase 1 Quad
28. hannel coupling COUPLI channel CYCLES cycles DATALO function interval DATALO start records DAV DAVER value DAVER DELAY time FAST on off A 2 reply format single integer data value single integer data value company product serial no version Oorl single integer data value single integer data value single integer data value single integer data value single integer data value single integer or real data value single integer data value index time data one record per line single integer data value single integer data value PSM3750 communications manual FILTER type dynamics FRA FRA FRA SWEEP FREQUE frequency FSWEEP steps start end log GAINPH GAINPH GAINPH SWEEP HARMON scan para h hmax HARMON or HARMON SERIES HARMON SWEEP HOLD on off INPUT channel type INPUT channel KEYBOA value LCR conditions param head LCR or LCR SWEEP or LOWFRE on off MARKER on off frequency MODE type MULTI L index ch func MULTI L NEWLOC NOOVER on off OFFSET offset OUTPUT type sweep phase PAV parameter scaling PAV PAV SWEEP PFCONV type PHASEM PHASEM PHCONV convention freq magl mag2 dB phase delay n lines of FRA data freq magl mag2 dB phase delay n lines of GAINPH data freq mag1 mag2 hmag1 hmag2 h1 h2 freq magl1 mag2 thd1 thd2 h1 h2 magl1 1 41 mag2 2 42 n lines of HARMON data single integer data value freq magl mag2 impedan
29. he data will still be held so to release the lock send SUSPEND OFF 2 61 PSM3750 communications manual NOOVER NOOVER Function Disable overranging Description Prevents an overrange error from blanking out results in manual ranging Format NOOVER value Arguments value ON OFF Reply none Example NOOVER ON Notes This can be useful when testing devices in a noisy environment The range can be set to the correct range for the signal to be measured even if sporadic noise spikes would push it up on to the next range 2 62 PSM3750 communications manual PFCONV PFCONV Function Set power factor sign convention Description Fundamental power factor is given a sign depending convention either negative if lagging current negative if leading current Format PFCONV type Arguments type NEGLAG NEGLEA Reply none Example PFCONV NEGLAG Notes An inductive load would have a lagging current a capacitive load would have a leading current The sign given to VAr can be independently set see VARCON 2 63 PSM3750 communications manual OFFSET OFFSET Function Set the output offset Description Sets the output generator offset in Volts Format OFFSET offset Arguments offset in Volts Reply none Example OFFSET 5e 3 set offset to 5mV Notes 2 64 PSM3750 communications manual OUTPUT OUTPUT Function Set output Description Turns the output on or off or sets the level mode to dBm or voltage Als
30. l equivalent of bits in status byte register that would generate a service request Example SRE 1 Notes 2 13 PSM3750 communications manual STB STB Function Read serial poll status byte Description Returns the decimal value of the serial poll status byte Format STB Arguments none Reply decimal value of the serial poll status byte Example STB 1 Notes The following bits in the serial poll status register have been implemented bit O RDV results data available bit 1 SDV sweep data available bit 3 ALA alarm active bit 4 MAV message available bit5 ESB standard event summary bit 2 14 PSM3750 communications manual TRG TRG Function Trigger Description Initiates a new measurement resets the ranging and filtering Format TRG Arguments none Reply none Example MODE VRMS TRG VRMS Notes 2 15 PSM3750 communications manual TST TST Function Self test query Description Returns the results of self test Format TST Arguments none Reply single integer bit O set if uncalibrated bit 1 set if error with analogue zero gt 15 major system error Example TST 0 Notes 2 16 PSM3750 communications manual WAI WAI Function Wait for operation complete Description Suspends communication until the previous operation has completed Format WAI Arguments none Reply none Example GAI NPH START WAI GAI NPH SWEEP Notes In the
31. log parameters or accesses datalog non volatile store Format DATALO function interval Arguments function DISABLE RAM NONVOL RECALL DELETE interval datalog interval in seconds Reply none Example DATALOG NONVOL 10 Notes 2 35 PSM3750 communications manual DATALO DATALO Function Read back datalog results Description Return datalog values one record per line Format DATALO start records Arguments Start first record to return records number of records to return Reply 3 to 6 data values depending on settings index 1 n elapsed time in hours datal data2 if stored data3 if stored data4 if stored one record per line Example DATALOG NONVOL 36 START wait for datalog STOP DATALOG 20 4 20 1 9000E 1 1 2345E0 21 2 0000E 1 1 2345E0 22 2 1000E 1 5 6789E3 23 2 2000E 1 1 2345E0 Notes if no arguments are sent then DATALOG returns all data in the same format 2 36 PSM3750 communications manual DAV DAV Function Data available query Description Returns data availability status Format DAV Arguments none Reply Decimal equivalent of data available bits bitO new data available bitl data available bit2 new full sweep data available bit3 sweep data available bit5 harmonic data available bit6 integration data available bit7 datalog data available Example START trigger sweep DAV 0 DAV 11 first data available DAV 11 DAV 11 DAV 15 full sweep data
32. m level and data Format ZOOM level data1l data2 data3 data4 Arguments level 0 no zoom 1 normal 2 4 line display 3 3 line display datal 4 function data for zoom data consists of line number for channel 1 or line number 64 for channel 2 or line number 128 for channel 3 Reply None Example VRMS ZOOM 1 1 12 level 1 ch1 rms ch2 rms Notes It is not necessary to send all the parameters but whatever parameters are sent must be in the correct order 2 106 PSM3750 communications manual ZOOM ZOOM Function Read the display zoom parameters Description Reads the zoom level and data Format ZOOM Arguments Reply 5 integers separated by commas Level datal data2 data3 data4 data consists of line number for channel 1 or line number 64 for channel 2 or line number 128 for channel 3 Example ZOOM 1 1 129 0 0 level 1 ch1 rms ch2 rms Notes 2 107 PSM3750 communications manual Appendices COMMAND SUMMARY CONFIGURABLE PARAMETERS PSM3750 communications manual COMMAND SUMMARY command format CLS ESE value ESE ESR DN OPC RST SRE value SRE STB TRG TST WAI ABORT ACTRIM channel level tol ALARM latch sounder ALARM ALARME value ALARME ALARM1 type data high low ALARM2 type data high low AMPLIT amplitude AUXILI device value BANDWI type BEEP BLANKI on off CONFIG parameter data CONFIG parameter COUPLI c
33. n a single string Format MULTILOG index phase function Arguments index 0 clear all 1 30 select data 1 30 phase 1 3 phase 1 3 4 sum 5 neutral function 1 99 see appendix Reply none Example MULTIL O MULTIL 1 1 2 phase 1 Watts MULTIL 2 2 2 phase 2 watts MULTIL 3 4 3 sum VA MULTI L 3 data values returned Notes 2 59 PSM3750 communications manual MULTI L MULTI L Function Reads multi string reply Description Waits for data to be available then returns selected results Format MULTI LOG or MULTI LOG lines Arguments Lines Integer Reply Up to 60 data values as selected by the MULTILOG command in a single reply string OR Up to 60 data values as selected by the MULTILOG command in a single reply string replying lines times Example MULTIL O MULTIL 1 1 2 phase 1 Watts MULTIL 2 2 2 phase 2 watts MULTIL 3 4 3 sum VA MULTIL 3 data values returned MUTLIL 5 Replies 5 times each containing 3 data values Notes The MULTILOG lines command will reply each time a new data point is available 2 60 NEWLOC Function Description Format Arguments Reply Example Notes PSM3750 communications manual NEWLOC Waits for new data then holds so that multiple commands can be used on the same data set Reads multiple sets of data NEWLOC None none NEWLOC HARMON SERIES HPOWER Harmonic series and Power data returned After the command t
34. nimum range CH3 CH3 Input 3 As CH1 B 3 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 B 4 PSM3750 communications manual Autoranging CH1 CH1 Input 1 As Chl Autoranging CH2 CH2 Input 2 As Ch1 Autoranging CH3 CH3 Input 3 0 Full Autorange 1 Autorange up 2 Manual Coupling CH1 CH1 Input 1 0 ac dc 1 ac Coupling CH2 CH2 Input 2 As Ch1 Coupling CH3 CH23 Input 3 As Chl Scale CH1 CH1 Input Enter figures Scale CH2 CH2 Input Enter figures Scale CH3 CH3 Input Enter figures External shunt CH1 CH1 Input Enter figures External shunt CH2 CH2 Input Enter figures External shunt CH3 CH3 Input Enter figures Display parameters Zoom level Main Display 0 Zoom 1 Zoom 2 Second zoom Display zoom characters on line 1 Display zoom characters on line 2 Display zoom characters on line 3 46 47 48 49 50 51 52 53 54 55 58 59 PSM3750 communications manual Display zoom characters on line 4 Display type Main display datalog or sweep display mode O Real Time 1 Table 2 Graph Signal generator parameters Generator frequency Output Options Enter figures Generator amplitude Output Options Enter figures Generator offset Output Options Enter figures Generator waveform Output Options O Sinewave 1 Triangle 3 Square wave 4 sawtooth 5 pulse 6 white noise Frequency step Output optio
35. nnot be executed bit 5 CME command interpretation error set when a command has not been recognised bit 7 PON power on event set when power first applied or unit has reset The bits in the standard event status register except for OPC are set by the relevant event and cleared by specific command ESR CLS RST OPC is also cleared by most commands that change any part of the configuration of the instrument such as MODE or START 1 3 PSM3750 communications manual 1 2 Serial Poll status byte ESB MAV ALM SDV RDV bit O RDV bit 1 SDV bit 3 ALA bit 4 MAV bit 5 ESB 1 4 result data available set when results are available to be read as enabled by DAVER sweep data available set when sweep results are available to be read as enabled by DAVER alarm active set when an alarm is active and enabled by ALARMER message available set when a message reply is waiting to be read standard event summary bit set if any bit in the standard event status register is set as well as the corresponding bit in the standard event status enable register set by ESE PSM3750 communications manual 1 3 RS232 connections The RS232 port on the instrument uses the same pinout as a standard 9 pin serial port on a PC or laptop 9 pin male D type Pin Function Direction 1 DCD in weak pull up 2 RX data in 3 TX data out 4 DTR out 5 GND 6 DSR not used 7 R
36. ns Enter figures Amplitude step Output options Enter figures Amplitude dBm Output options 116 system control Enter figures Generator after sweep Sweep Control 0 Off 1 On Datalog parameters Datalog Acuisition Control memory type O Disabled 1 RAM 2 Non volatile Interval Acuisition Control RAM Non volatile Enter time figures B 5 64 65 66 83 99 100 101 102 B 6 PSM3750 communications manual General parameters Frequency marker Sweep Control 0 Off 1 On Marker frequency Enter frequency Graph display After sweep alters marker position Program 1 6 direct load System Options O Disabled 1 Enabled Power meter parameters Integration type Power meter O Signed 1 Magnitude Harmonic analyser parameters Scan Harmonic analyser O Single 1 Difference thd 2 Series thd Harmonic Harmonic analyser 0 1 2 2 3 3 4 5 Os etc up to 64 Harmonics Max Harmonic analyser scan series thd 2 2 Parameter Harmonic analyser 0 103 106 107 108 109 116 117 118 119 137 PSM3750 communications manual 1 dB Bargraph Scale Harmonic analyser scan series thd Enter figure LCR sweep zero parameters Frequency LCR Mode Zero O Single 1 Sweep Sweep start frequency LCR Mode Zero Enter figures Sweep end frequency LCR Mode Zero Enter figures Steps LCR Mode Zero Enter figures System parameters Con
37. o specifies the action at the end of a sweep Format OUTPUT command sweep phase Arguments command OFF ON DCONLY VOLT DBM sweep OFF ON DCONLY Reply none Example OUTPUT ON Notes For safety the output defaults to off and must be turned on explicitly It is not necessary to send all the arguments but if they are sent they must be in the specified order 2 65 PSM3750 communications manual PAV PAV Function Set phase angle voltmeter mode Description Set phase angle voltmeter mode and parameter Format PAV parameter lvdt scale Arguments parameter INPHAS QUADR TANPHI MAGNIT POLAR A2 1 RMS2 RMS2 1 LVDT D LVDT R Ivdt scale scale factor in m for lvdt applications Reply none Example PAV LVDT D 0 1 Notes It is not necessary to send any arguments but those that are sent must be in the specified order PAV and VECTOR are aliases for the same command 2 66 PSM3750 communications manual PAV PAV Function Phase angle voltmeter query Description Read phase angle voltmeter results Sets phase angle voltmeter mode if not already set Waits for next unread data if necessary Clears new data available bit read by DAV Format PAV or PAV RMS or PAV SWEEP Arguments none or SWEEP Reply 7 data values separated by commas freq magl1 mag2 ratio phase a b 5 data values if CH3 enabled mag3 ratio3 phase3 a3 b3 rms values if PAV RMS 1 line per result for sweep data
38. pressing the HOME key 2 53 LCR Function Description Format Arguments Reply Example Notes 2 54 PSM3750 communications manual LCR Set LCR meter mode Set LCR mode and conditions LCR conditions parameter head conditions AUTO MANUAL parameter AUTO CAPACITANCE INDUCTANCE MPEDANCE ADMITTANCE head NONE LOW only valid for IAI NORMAL HIGH VHIGH none LCR AUTO MPEDA NORMAL It is not necessary to send any arguments but if any are sent they must be in the specified order LCR Function Description Format or or Arguments Reply or sweep reply Example Notes PSM3750 communications manual LCR LCR meter query Read LCR meter results Sets LCR meter mode if not already set Waits for next unread data if necessary Clears new data available bit read by DAV LCR LCR SWEEP LCR SWEEP none or SWEEP 14 data values separated by commas freq magl mag2 impedance phase series R series C series L R C L tan Q reactance 11 data values separated by commas freq magl mag2 impedance phase resistance reactance admittance phase conductance susceptance 8 data values per line per sweep result freg Q tans impedance phase L C R OUTPUT ON LCR data returned LCR waits for next unread data LCR SWEEP does not wait for new data data can be read multiple times 2 55 PSM3750 communications manual
39. quired to set the type Both arguments must be sent to set the dynamics FILTER is an alias for SMOOTH 2 87 PSM3750 communications manual SPEED SPEED Function Sets the measurement speed Description Sets the minimum window size for the measurement Format SPEED value SPEED WINDOW time Arguments value FAST MEDIUM SLOW VSLOW WINDOW Reply none Example SPEED SLOW SPEED WINDOW 0 1 Notes 2 88 PSM3750 communications manual START START Function Start sweep Description Initiate sweep in those functions that have a sweep or resets filtering in others Format START Arguments none Reply none Example MODE GAINPH set gain phase analyser START Notes 2 89 PSM3750 communications manual STATUS STATUS Function Read back channel ranging status Description Read back condition of selected channel range number 1 16 range text overflow underflow status Format STATUS or STATUS channel Arguments channel CH1 CH2 CH3 Reply If no channel specified OVER if any channel overflow LOW if any channel underflow OK if all channels in range Else range number range text status 1 16 range as per RANGE command OVER if overflow LOW if underflow OK if in range Example STATUS CH1 6 3V OK Notes 2 90 PSM3750 communications manual STOP STOP Function Stop sweep Description Stop an active sweep or data streaming Format STOP Arguments none Reply none Example MODE
40. ration complete Returns 1 if previous operation is completed 0 if not OPC none Oorl START OPC 0 OPC 0 OPC 1 OPC can be used to indicate when data is available or when a frequency sweep has completed PSM3750 communications manual RST RST Function Reset Description Resets the instrument to the default state and clears the standard event status register Format RST Arguments none Reply none Example RST Notes The RST command loads the default configuration This is the same as loading the default configuration via the PROGRAM menu Any preceding setup commands will be overwritten RST should be followed by an end of line not a message separator lt may be helpful to follow it with a short pause to allow the new configuration to become active before sending further command s 2 11 PSM3750 communications manual SRE SRE Function Set service request enable register Description Enable which bits of the status byte register initiate a service request Format SRE value Arguments decimal equivalent of bits in status byte register Reply can be read by SRE Example SRE 1 generate a service request when data available Notes 2 12 PSM3750 communications manual SRE SRE Function Read service request enable register Description Read back the present setting of the service request enable register Format SRE Arguments Reply decima
41. rature 2 Tanod 3 Magnitude 4 Phase 5 In phase ratio 6 rms 7 rms2 rmsl 8 LVDT diff 9 LVDT ratio 10 User interface Scale factor LVDT Vector voltmeter Enter figures Null meter Vector voltmeter 0 Off 1 Auto 2 Manual Upper limit Null meter Vector voltmeter Enter figures Offset Parameter Vector voltmeter Enter figures Trim parameters ac trim data Trim control O Disabled ac level Trim data Vector voltmeter Enter figures Trim tolerance Trim data Vector voltmeter Enter figures Other parameters Steps Sweep control B 11 PSM3750 communications manual O Log 1 Linear 193 Graph 1 scaling Sweep control O Auto 1 Manual 194 Upper limit Graph 1 scaling Sweep control Enter figures 195 Upper limit Graph 2 scaling Sweep control Enter figures 198 Resolution Comms Remote Options O Normal 1 High 2 Binary B 12 Newtons4th Ltd contact details Please direct all queries or comments regarding the PSM3750 instrument or this manual to Newtons4th Ltd 30 Loughborough Rd Mountsorrel LOUGHBOROUGH LE12 7AT United Kingdom Tel 0116 230 1066 international 44 116 230 1066 Fax 0116 230 1061 international 44 116 230 1061 E mail address sales newtons4th com office newtons4th com web site www newtons4th com At Newtons4th Ltd we have a policy of continuous product improvement and are always keen to hear comments whether favourable or unfavourable from users of o
42. rs is given in the appendix CONFIG goes through the same limit checking as when entering data from the menus 2 31 PSM3750 communications manual CONFIG CONFIG Function Configurable parameter query Description Reads the present value of a single parameter Format CONFIG index or CONFIG index Arguments index is the parameter number Reply Value of parameter real or integer as appropriate Example CONFIG 6 read phase convention 0 CONFIG 6 1 CONFIG 6 1 Notes The list of configurable parameters is given in the appendix 2 32 PSM3750 communications manual COUPLI COUPLI Function Set ac or dc coupling Description Selects the input coupling for a given input channel Format COUPLI channel coupling Arguments channel CH1 CH2 coupling AC DC ACONLY Reply none Example COUPLI CH2 AC DC Notes PSM3750 communications manual CYCLES CYCLES Function Set the minimum number of cycles for a measurement Description The measurement window is normally set according to a time value but subject to a whole cycle of the frequency Setting a minimum number of cycles to a value greater than 1 extends the measurement window at frequencies where the periodic time is longer than the set window time Format CYCLES cycles Arguments minimum number of cycles Reply none Example CYCLES 4 Notes 2 34 PSM3750 communications manual DATALO DATALO Function Set up datalog Description Sets data
43. surement should be made Format DELAY time Arguments delay time in seconds from 1 to 60 Reply none Example DELAY 1 Notes Whole seconds only 2 40 PSM3750 communications manual FAST FAST Function Set fast communications mode Description Disables the screen drawing for high speed operation Format FAST value Arguments value ON OFF Reply none Example FAST ON Notes FAST mode does not suppress the data acquisition which continues in the background See SUSPEND to disable all non communication functions 2 41 PSM3750 communications manual FILTER FILTER Function Select the filtering Description Sets the filter time constant and dynamic response Format FILTER type dynamics Arguments type NONE NORMAL SLOW dynamics AUTO FIXED Reply none Example FILTER NORMAL FIXED FILTER NONE Notes It is not necessary to send both parameters if it is only required to set the type Both arguments must be sent to set the dynamics 2 42 PSM3750 communications manual FRA FRA Function Set frequency response analyser mode Description Set frequency response analyser mode Format FRA Arguments Reply none Example FRA Notes This command has the same effect as MODE GAINPH FRA GAINPH TFA are aliases for the same command 2 43 PSM3750 communications manual FRA FRA Function frequency response analyser query Description Read frequency response analyser results Sets freq
44. tion Format Arguments Reply Examples Notes 2 72 PSM3750 communications manual POWER Set up power meter mode Configure power meter with integration type POWER integration type integration type MAGNITUDE SIGNED none POWER SIGNED POWER It is not necessary to send the integration type argument PSM3750 communications manual POWER POWER Function Read power meter results Description Reads back latest power meter results Sets power meter mode if not already set Waits for next unread data if necessary Clears new data available bit read by DAV Format POWER or POWER results or POWER results Arguments results WATTS RMS INTEGR Reply WATTS 9 data values separated by commas W W f VA VA f pf pf f Wdc W h freq RMS 8 data values separated by commas rms1 2 dc1 2 f1 2 phasel 2 INTEGR 9 data values separated by commas Wh Wh f VAh VAh f avpf avpf f Ah Ah f time no argument 26 data values separated by commas WATTS RMS INTEGR Example POWER WATTS Notes 2 73 PROGRA Function Description Format Arguments Reply Example Notes 2 74 PSM3750 communications manual PROGRA Access non volatile program stores Recall store or delete non volatile program store PROGRA function number function RECALL STORE DELETE number 0 999 none PROGRA RECALL 13 Number 0 represents factory default which can only be recalled
45. to 360 2 0 to 360 7 Generator output Output Options 0 Off 1 0n B 1 11 12 13 14 15 16 18 19 B 2 PSM3750 communications manual 2 dc only Graph System Options O Dots 1 Lines Keyboard beep System Options 0 Off 1 0n Low frequency mode Acquisition Control 0 Off 1 0n Speed window size Acquisition Control Enter figures Speed Acquisition Control O Very slow 1 Slow 2 Medium 3 Fast 4 Very fast 5 Window Filter Acquisition control 0 Normal 1 Slow 2 None Filter dynamics Acquisition Control Filter normal slow O Auto reset 1 Fixed time Baud rate Comms Remote Options RS232 0 19200 1 9600 2 4800 3 2400 4 1200 Sweep steps Sweep Control Enter step number figures Sweep start frequency Sweep Control Enter figures 20 21 22 23 24 25 26 27 28 29 PSM3750 communications manual Sweep end frequency Sweep Control Enter figures Sweep type Sweep Control O Single 1 Repeat Conditions LCR Meter O Auto frequency 1 Manual 2 Auto shunt Shunt System Options O Default 1 Manual Input parameters Input 1 CH1 CH1 Input 1 O Direct 1 External shunt 2 External attenuator Input 2 CH2 CH2 Input 2 As Ch1 Input 3 CH3 CH3 Input 3 As Ch1 Minimum range CH1 CH1 Input 1 O 1mv 1 3mv 2 10mv 3 30mv 4 100mv 5 300mv 6 1v 7 3v 8 10v Minimum range CH2 CH2 Input 2 As CH1 Mi
46. trol System options 0 Volts 1 dBm Step message System options O Enabled 1 Disabled Display sequence Graph display After sweep alters screen display O Primary Parameter 1 Secondary Parameter 2 Both Parameters Length units System options O Metres 1 Inch LCR meter parameters Parameter LCR Meter O Auto 1 Capacitance 2 Inductance 3 mpedance B 7 138 139 140 141 142 143 144 145 147 148 B 8 PSM3750 communications manual 4 Admittance Sweep LCR Meter O Series 1 Parallel Graph LCR Meter O Single 1 Tand QF 2 Resistance LCR head shunt Auxiliary control fixture LCR active head O Low 1 Normal 2 High 3 Very high Graph LCR meter impedance O Linear 1 Log Phase reference Mode LCR Zero LCR Compensation Enter figures Reference Value Mode LCR Zero LCR Compensation Enter figures Reference Mode LCR Zero LCR Compensation O Capacitance 1 Resistance 2 Inductance Connection LCR Meter 0 Shunt 1 Divider Zx low 2 Divider Zx high Gain Phase analyser parameters Graph time selection FRA O Phase 1 Delay dB offset FRA Enter figures 149 150 151 152 153 154 156 157 158 159 PSM3750 communications manual Gain Phase margins FRA O Disabled 1 Enabled Ratio FRA O ch2 ch1 1 ch1 ch2 System parameters Minimum cycles Acquisition control Enter figures Delay time Acquisition control Enter fi
47. uency response analyser mode if not already set Waits for next unread data if necessary Clears new data available bit read by DAV Format FRA or FRA SWEEP Arguments none or SWEEP Reply 6 data values separated by commas freq magl1 mag2 db phase delay 4 values if 3 channels in use mag3 db3 phase3 delay3 one line per result for sweep data Example OUTPUT ON FRA FSWEEP 20 10 20E3 START DAV 3 DAV 15 FRA SWEEP data returned Notes FRA waits for next unread data FRA SWEEP does not wait for new data FRA GAINPH TFA are aliases for the same command 2 44 PSM3750 communications manual FREQUE FREQUE Function Set the output frequency Description Sets the generator output frequency in Hz Format FREQUE frequency Arguments frequency in Hz Reply none Example FREQUE 5e4 set frequency to 50kHz Notes 2 45 PSM3750 communications manual FSWEEP FSWEEP Function Set the frequency sweep parameters Description Sets the start frequency in Hz the end frequency the number of steps and log linear for the selected function Format FSWEEP steps start end type Arguments steps number of steps start start frequency in Hz end end frequency in Hz type LOGARI LINEAR Reply none Example MODE GAINPH FSWEEP 50 1000 1e6 set 50 steps between 1kHz and 1MHz Notes It is not necessary to send all the arguments but if they must be in the specified order The action at the end of th
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