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SFRA45 User Manual

14-4

14.3

Text File Example Sweep Data

The data portion of the file starts at ‘Results, sweep
data’. This example is an impedance sweep. There
are five columns of data: Frequency (Hz), Impedance

(Ohms), Phase (degrees), Resistance (Ohms) and
Reactance (Ohms).

The  two  columns  Frequency  and  Impedance  may  be
used  in  Excel  to  plot  a  frequency  versus  impedance
graph. All information is given in scientific notation.
In this example, the frequency starts at 150 kHz and
goes to 210 kHz. The impedance starts at 252 ohms
and  goes  to  a  peak  impedance  of  6700  ohms  and
then  down  to  235  ohms.  Note:  the  headers  and
columns do not line up.

Results,sweep data
Frequency(Hz),Impedance(Ohm),Phase(deg),Resistance(Ohm),Reactance
(Ohm)

1.5000E+05, 2.5299E+02, 8.9272E+01, 1.9924E+04, 2.5301E+02
1.5122E+05, 2.6595E+02, 8.9195E+01, 1.8921E+04, 2.6597E+02
1.5245E+05, 2.8018E+02, 8.9104E+01, 1.7916E+04, 2.8021E+02

1.5367E+05, 2.9589E+02, 8.8996E+01, 1.6897E+04, 2.9594E+02
1.5490E+05, 3.1331E+02, 8.8875E+01, 1.5960E+04, 3.1337E+02
1.5612E+05, 3.3274E+02, 8.8739E+01, 1.5113E+04, 3.3282E+02

1.5735E+05, 3.5461E+02, 8.8583E+01, 1.4334E+04, 3.5471E+02
1.5857E+05, 3.7929E+02, 8.8400E+01, 1.3579E+04, 3.7944E+02

1.5980E+05, 4.0746E+02, 8.8190E+01, 1.2898E+04, 4.0767E+02
1.6102E+05, 4.4011E+02, 8.7904E+01, 1.2031E+04, 4.4040E+02
1.6225E+05, 4.7794E+02, 8.7612E+01, 1.1468E+04, 4.7835E+02

1.6347E+05, 5.2246E+02, 8.7259E+01, 1.0924E+04, 5.2306E+02
1.6469E+05, 5.7575E+02, 8.6835E+01, 1.0430E+04, 5.7663E+02
1.6592E+05, 6.4062E+02, 8.6313E+01, 9.9621E+03, 6.4195E+02

1.6714E+05, 7.2129E+02, 8.5656E+01, 9.5223E+03, 7.2337E+02
1.6837E+05, 8.2443E+02, 8.4810E+01, 9.1143E+03, 8.2782E+02
1.6959E+05, 9.6025E+02, 8.3673E+01, 8.7134E+03, 9.6614E+02

1.7082E+05, 1.1480E+03, 8.2109E+01, 8.3617E+03, 1.1589E+03
1.7204E+05, 1.4224E+03, 7.9769E+01, 8.0082E+03, 1.4454E+03

1.7327E+05, 1.8611E+03, 7.5908E+01, 7.6439E+03, 1.9189E+03
1.7449E+05, 2.6516E+03, 6.8864E+01, 7.3535E+03, 2.8428E+03
1.7571E+05, 4.3198E+03, 5.2361E+01, 7.0735E+03, 5.4552E+03

1.7694E+05, 6.7700E+03, 6.1537E+00, 6.8092E+03, 6.3152E+04
1.7816E+05, 4.6626E+03,-4.4704E+01, 6.5601E+03,-6.6282E+03
1.7939E+05, 2.8250E+03,-6.3450E+01, 6.3203E+03,-3.1581E+03

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Содержание SFRA45

Страница 1: ...SFRA45 USER MANUAL Version2 10 November 2018 ...

Страница 2: ... that provides you with the tools to make a wide variety of measurements accurately reliably and efficiently but good metrology practice must be observed Take time to read this manual and familiarise yourself with the features of the instrument in order to use it most effectively ...

Страница 3: ... underneath and rear free from obstruction Do not operate or store under conditions where condensation may occur or where conducting debris may enter the case 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 ex...

Страница 4: ...es 2014 30 EU relating to electromagnetic compatibility EN 61326 1 2013 2014 35 EU relating to Low Voltage Directive EN 61010 2 030 2010 IP Protection of Inputs and Outputs IP 30 CEI EN 60529 Operating Temperature 5 to 50 C Storage Temperature 10 to 60 C Relative Humidity Range 20 90 Non Condensing Max Altitude 2 000 Metres Stuart Chappell Director Newtons4th Ltd ...

Страница 5: ... If the problem cannot be resolved directly then you will be given an RMA number and asked to return the unit The unit will be repaired or replaced at the sole discretion of Newtons4th Ltd This guarantee is limited to the cost of the instrument itself and does not extend to any consequential damage or losses whatsoever including but not limited to any loss of earnings arising from a failure of the...

Страница 6: ...esponse Analyzer Detailed descriptions of the communications command set for RS232 USB and LAN is given in the separate manual SFRA45 communications manual Version 2 1 5th November 2018 This manual is copyright 2006 2018 Newtons4th Ltd and all rights are reserved No part may be copied or reproduced in any form without prior written consent ...

Страница 7: ...ing the menus 5 1 5 1 Selection from a list 5 3 5 2 Numeric data entry 5 4 6 Special functions 6 1 6 1 Display zoom 6 1 6 2 PROG non volatile memory store and recall 6 1 6 3 Zero Compensation 6 3 6 4 Using Remote Control 6 5 6 5 Standard event status register 6 7 6 6 Serial Poll status byte 6 8 6 7 RS232 connections 6 9 6 8 RS232 printer 6 10 7 System options 7 1 7 1 User data 7 2 8 Setup Key Func...

Страница 8: ...ts 8 20 8 14 Memory Status 8 22 9 Frequency Response Analyzer 9 1 9 1 FRA Screen Display Areas 9 5 10 Impedance Mode 10 1 10 1 LCR Screen Display Areas 10 2 11 AC RMS Mode 11 1 12 Oscilloscope Mode 12 1 13 Technical Specifications 13 1 14 Appendix A Text File Format 13 2 14 1 Example Text File 14 2 14 2 Text File Header Format Explanation 14 3 14 3 Text File Example Sweep Data 14 4 Appendix A Cont...

Страница 9: ...SFRA45 User Manual vii APPENDICES Appendix A Accessories Appendix B Serial command summary Appendix C Available character set Appendix D Configurable parameters Appendix E Contact details ...

Страница 10: ...gital analysis at low frequencies and a heterodyning technique to give high accuracy at high frequencies The voltage inputs are simultaneously sampled and the data is analysed in real time by high speed DSPs digital signal processors A separate CPU central processing unit takes the DSP results for display and communications At the heart of the system is an FPGA field programmable gate array that i...

Страница 11: ...strument is NOT waterproof or airtight Return to the factory for evaluation if exposed to abnormal environmental conditions Do not operate or store under conditions where condensation may occur or where conducting debris may enter the case Keep the ventilation holes on the top and bottom ends of the instrument clear NOTE Operators should follow all standard and specific company safety procedures w...

Страница 12: ...alibrated and does not require anything to be done by the user before it can be put into service The instrument is housed in a rugged aluminium case and is provided with various accessories together as shown above N4L Bushing Clamps SFRA45 Instrument Aluminium Carry Case 2x Earth Clamps and 5m Earth braids Instrument 2GB Memory Stick 3x 18m BNC Integrated Cable Reel ...

Страница 13: ...s will provide the user with valuable information Therefore 1 Gigabyte of memory an external USB port and an RJ45 input connection for laptop connectivity provides a versatile solution for storage and communication 5 7 Colour Display to maximize Visibility in all conditions Weight 2 7 Kgs 5 lbs Operates from an internal rechargeable Lithium Ion Battery an AC DC Power Source or an external 12V Vehi...

Страница 14: ...then be used to power and charge the instrument The DC input will operate with a 9 18V dc source at 3A however the equipment warranty does not cover any damage caused by any other source than the ones provided with this instrument Charging the batteries The instrument has a sophisticated battery monitoring and charging system providing the user with a battery status indication When running on batt...

Страница 15: ...uld be used when opening the instrument such as a grounding strap Note the position and location of all ribbon cables Disconnect ribbon cables as necessary to securely rest the instrument cover face down Cut the tie wraps holding the batteries in and remove all of the old batteries NOTE All three batteries should be replaced at the same time Make sure disposal of the used batteries is in accordanc...

Страница 16: ...SFRA45 User Manual 3 5 Communication and Power Panel 12v Power Inlet Ventilation fan LAN RS232 USB USB Port Memory Stick Power Button ...

Страница 17: ...n Give the unit two minutes to warm up and then press the ZERO button Connect the output lead of the output BNC to CH1 and CH2 inputs Press the OUT key to call up the output menu and set the output to ON Set the output amplitude to 2V Exit the menu by pressing the ENTER button or the HOME Button twice The display should indicate an RMS value of around 470mV Input Impedance set to 50 Ohms Press the...

Страница 18: ...s of the instrument FRA Frequency Response Analyzer Selects the Frequency Response Analyzer Mode LCR Impedance Analyzer Selects the Impedance Analyzer Mode RMS AC RMS Selects the AC RMS Mode Scope Scope Mode The factory default setting is the FRA Mode Press the operating mode key FRA etc a second time or press the MODE key to access mode specific options ...

Страница 19: ...lue data entry HOME ESC returns to the original entry or to your previous action DELETE BACK removes a previous selection or value or returns to your previous action ARROW KEYS Up Down L R to move around menu options make incremental decremental changes etc Also to position cursors in SCOPE mode ...

Страница 20: ...splay Control Keys Display Zoom a Return to no zoom by pressing ZOOM b Press ZOOM to zoom in Real time Toggles between continuous display readings and Table graphs Table Graph Select tabular or graphical presentation of sweep data ...

Страница 21: ...a ACQU Data acquisition parameters speed filtering SWEEP Frequency Sweep Control TRIM Generator Trim Control COMMS Communications Option OUT Signal Generator Control CH1 Channel 1 Input Control CH2 Channel 2 Input Control SYS General Systems Options MODE Function Control PROG Recall Store Delete of non volatile programs FOR NUMERIC ENTRY see DATA ENTRY GUIDE ...

Страница 22: ...leads from the measured impedance FRA Mode provides 0dB reference and dB calculation information TRIGGER or START returns display to Real Time from Hold Also triggers single shot in SCOPE mode The four circular keys on the right have a second function The letter above each key is a numeric multiplier M for mega K for kilo m for milli and µ for micro When entering large or small numbers these multi...

Страница 23: ...s HOME MENU CONTROL KEYS to abort data entry restore original Values may be overwritten or edited by use of the R L and DELETE keys 4 7 Testing a Power Transformer Example The SFRA45 includes a Power Transformer mode which fully complies with IEC60076 18 This ensures that all necessary parameters and information are recorded on the instrument without the requirement for a PC The default settings w...

Страница 24: ... the generator will be off Configure Inputs By pressing INPUT we can view edit the input settings The default settings for are an input impedance of 50 Ohms which should be left the same The N4L Clamps parameter will be set to No If you are using the N4L clamp set set this to Yes ...

Страница 25: ... to satisfy a typical transformer test These can be changed as per the user preference Remote communication port settings If you are using the unit in conjunction with SFRAComm software pressing the COMMS key will reveal the communication menu the unit should be set as per your communication interface The options are USB RS232 and LAN ...

Страница 26: ...pk the generator can be turned on in this menu It is advisable to connect to the transformer winding before activating the generator in order to prolong battery life Loading a Reference Sweep Pressing the SWEEP RECALL button to the far top right of the keypad will open the file directory Pressing again will toggle between the external USB memory stick memory and the internal memory ...

Страница 27: ... that 2GB is the maximum allowable size of USB memory stick that can be used By Pressing ENTER on the selected sweep Selected using the UP and DOWN arrow keys the sweep data will be loaded including all sweep acquisition settings ...

Страница 28: ...rol CH1 Channel 1 Input Control CH2 Channel 2 Input Control SYS General Systems Options MODE Function Control PROG Recall Store Delete of non volatile programs Each menu starts with the currently set parameters visible but no cursor In this condition pressing the menu key again or the HOME key aborts the menu operation and reverts back to normal operation To select any parameter press the UP or DO...

Страница 29: ...ate where the parameters are displayed but the cursor is hidden Pressing the HOME key at this point exits the menu sequence and reverts back to normal operation To abort the menu sequence press the HOME key twice There are three types of data entry selection from a list numeric text ...

Страница 30: ... steps forward through the list and the LEFT key steps backwards through the list The number keys 0 9 step directly to that point in the list which provides a quick way to jump through long lists There is no need to press the ENTER key with this data type For example if the smoothing selection list comprises the options normal item 0 slow item 1 none item 2 and the presently selected option is nor...

Страница 31: ...o the requested value as possible For example the minimum user defined measurement window 10ms if a value of 5ms is entered a warning will be given and the amplitude set to the maximum of 10ms When the parameter is first selected there is no character cursor visible in this condition a new number may be entered directly and will overwrite the existing number To edit a data value rather than overwr...

Страница 32: ... has an associated name of up to 200 characters that can be entered by the user to aid identification Program number 1 if not empty is loaded when the instrument is powered on so that the SFRA45 can be set to a user defined state whenever it is switched on This is particularly useful to set system options such as phase convention If no settings have been stored in program 1 then the factory defaul...

Страница 33: ...ith the instrument rather than a stored program There is a selectable option in the REMOTE menu to enable the recall with program If this is off then recalling the program will not change the communications interface All file directory information can be displayed by pressing the Prog key and then the Start button This will allow all the information to be displayed as a table and show what the int...

Страница 34: ... remaining offset also happens when the offset is trimmed but is also repeated at regular intervals This is to compensate for any thermal drift in the amplifier chain Real time measurement is not possible while the autozero measurement is in progress so this repeated autozero function can be disabled via the SYSTEM OPTIONS menu LCR mode provides zero compensation information and is used to remove ...

Страница 35: ...0dB reference ZERO COMPENSATION To compensate for long connection leads when making impedance measurements connect the cables to the instrument but leave them disconnected from the DUT Ensure that the disconnected terminals are not touching anything Select the compensate option below and press ENTER compensate In case you want to clear the compensation Select the clear compensation option below an...

Страница 36: ...plies from the SFRA45 are always upper case delimited by commas Fields within a command are delimited by a comma multiple commands can be sent on one line delimited with a semi colon Eg BANDW LOW SPEED SLOW Mandatory commands specified in the IEEE488 2 protocol have been implemented e g IDN RST and all commands that expect a reply are terminated with a question mark Data values returned by the SFR...

Страница 37: ... the network for this to work The LAN will not start normal operation until it receives an IP address from the server Setting the LAN IP manually will disable the DHCP and the unit will use a fixed IP address defined by the IP Address setting in the REMOTE menu 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 RE...

Страница 38: ...nt has an error bit 4 EXE execution error set when the command cannot 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 ...

Страница 39: ...when data streaming results are available to be read as enabled by DAVER bit 3 ALA alarm active set when an alarm becomes active as enabled by ALARMER bit 4 MAV message available set when a message reply is waiting to be read bit 5 ESB 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...

Страница 40: ...only transmit when CTS pin 8 is asserted and can only receive if DCD pin 1 is asserted KinetiQ constantly asserts 12V DTR pin 4 so this pin can be connected to any unwanted modem control inputs to force operation without handshaking KinetiQ 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 ...

Страница 41: ...reen When printing is enabled in the REMOTE menu then pressing START will commence a screen dump to the printer The graphic protocol used is the ESC P so any printer which supports this protocol should work such as the Seiko DPU 414 The other communication options USB LAN or GPIB can still be used while the RS232 printer is enabled ...

Страница 42: ...nvironments if the feel of the key is sufficient feedback Regular autozero measurements can be suppressed The main function keys can be used to load stored configurations as a one touch way of configuring the instrument for specific applications This is particularly useful in a production environment where an operator has a small number of specific tests to perform To save these system settings as...

Страница 43: ...d every time that the instrument is switched on to identify the instrument The entered text may also be read over the communications to identify the instrument see USER Typical arrangement of the user data might be line 1 company name line 2 department or individual name line 3 unique identifying number eg asset number Any user data may be entered as required as the lines are treated purely as tex...

Страница 44: ...nd the time constant of the filter Greater stability is obtained at the slower speed at the expense of a slower update rate Note that at low frequencies the window is extended to cover a complete cycle of the input waveform even if this is a longer period than the nominal update rate Filter Filter has three options normal slow and none This sets how many samples the instrument takes before updatin...

Страница 45: ...options dual gain and phase This sets how the frequency response is displayed the two options work in conjunction with the computation option Selecting gain plots the gain or loss of the signal levels between the two channels Phase plots the phase angle difference between the two channels Bandwidth Bandwidth has two options auto and wide The bandwidth of the instrument usually set to auto can be f...

Страница 46: ...tion selected Selecting real time returns the display back to normal operation This information may be saved via the PROG key either internally on a memory stick or directly to a PC Sweep Start Sweep End and Sweep Steps The sweep start and sweep end sets the two frequencies over which the band will cover The sweep steps sets the number of steps taken to cover the frequency band at each step a read...

Страница 47: ...m here both levels can be specifically set Frequency Marker Has three options off single and dual If single is selected this adds marker 1 function to the left menu and If dual is selected this also adds marker 2 function to the left menu allowing the setting of a specific frequency to be entered While in the sweep mode it draws a vertical line on the graph at that frequency allowing the user to d...

Страница 48: ...laced on the graph to reference a specific frequency Up to 30 sweeps may be stored in non volatile memory using the PROG key Sweeps are stored in blocks of 50 points larger sweeps use contiguous blocks eg steps in sweep blocks per sweep max number of sweeps 2 50 1 30 51 100 2 15 101 150 3 10 151 200 4 7 201 250 5 6 251 500 8 3 501 1000 15 2 1001 2000 30 1 ...

Страница 49: ...e At each measurement point the measured level is checked against the specified level and tolerance if an adjustment is needed the data is discarded and a new measurement made at the new output level The user is alerted to the adjustment by an audible beep Particularly important in control loop analysis where it is sometimes referred to as amplitude compression it prevents the control loop being o...

Страница 50: ...lected and has four settings 38400 19200 9600 and 1200 depending on the data rate of the system the instrument is interfacing with USB Option The USB option activates the Type B connector at the bottom of the meter LAN Option This option activates the LAN connector at the bottom of the meter and adds an IP address function to the menu The address can be entered using the arrow keys 8 5 DUT Key Sel...

Страница 51: ...y the manufacturer Serial Number DUT Serial Number Measurement Setup Reference Terminal identification of the DUT terminal to which the reference and source leads were connected Response Terminal Identification of the DUT terminal to which the response lead is connected Connected Terminals Identification of all terminals which were connected together during the measurement for eg a1 b1 c1 a2 b2 c2...

Страница 52: ...options yes or no Yes or No depending on whether the test object was fully filled with normal operating fluid during measurement 8 6 AUX KEY This is for the Auxiliary Port Settings and is for future applications it is not functional at this time ...

Страница 53: ...ected to the case The maximum output available from the generator is a function of frequency Frequency output level into 50Ω MHz peak V rms V 5 5 3 5 10 3 2 15 2 1 4 20 1 5 1 25 1 2 0 8 30 1 0 7 45 0 75 0 5 Amplitude Control Has two options V or dBm and controls how amplitude and amplitude step is displayed on the screen Amplitude is displayed either in Volts or dBm and is adjusted using the outpu...

Страница 54: ...ms The two channels are controlled independently but sampled synchronously N4L Clamps Has two options No Yes No will disable clamp correction Yes will enable clamp correction CHx input ranging Has three options full auto range range up only and manual Use full auto range for normal signals allowing the instrument to select the optimum range for the signal level Range up is useful for rapidly fluct...

Страница 55: ...V 500mV 6 1V 1V 1 5V 7 3V 3 16V 5V 8 10V 10V 10V The maximum input signal that can be accurately measured varies with frequency frequency max input level MHz peak V rms V 1 10 7 5 6 4 10 3 2 15 2 1 4 20 1 5 1 25 1 2 0 8 30 1 0 7 45 0 75 0 5 The input ranges may be selected manually or by auto ranging default The start range for auto ranging may be selected if it is known that the signal will not b...

Страница 56: ...ently using and sets the auto ranging to manual thus locking the range and preventing further auto ranging Pressing the ZERO key again returns to full auto ranging from the bottom range For most measurement functions full auto ranging is the most suitable option but some applications such as where transient events are occurring are more reliable with manual ranging Manual ranging or up only auto r...

Страница 57: ...the UP DOWN arrow keys to highlight the month day or year and the LEFT RIGHT arrow keys to change the date Display Has three options colour white on black and black on white The white on black option is easier to see in natural daylight due to the shielding in the glass of the display Glare does occur in direct sunlight Brightness The instrument display has two options low and high The default set...

Страница 58: ...own using the arrow keys It shows the new value selected The step message may be disabled if desired User Settings This function is accessed by pressing the system key followed by the right arrow key this will then display the screen in figure 14 1 This allows the user to enter three separate lines of information which are saved in a data file when save is selected and ENTER pressed User Data Exam...

Страница 59: ...mpedance manufacturing code main release DSP release FPGA release boot release and last calibration From this data the user can see the instrument traceability information firmware release levels calibration date etc and determine if any updates are necessary or if the instrument is due calibration USER SETTINGS User data Newtons4th Ltd User data User data save USER SETTINGS User data Power Statio...

Страница 60: ... can be displayed by pressing the Prog key and then the START button This will allow all the information to be displayed as a table and show what the internal file directory contains By pressing the START button again exits the directory Note This information is also available to be read over the instrument communication link Memory Memory has two options internal and USB memory stick The instrume...

Страница 61: ...ocation must have a number but name is optional and can remain as empty Using the LEFT RIGHT arrow keys allows the location to be incremented or decremented 0 factory default Execute Execute is used to control the action option After selecting an action store recall or delete the execute option is selected and the enter key pressed If the memory location selected already has results or a setup sto...

Страница 62: ...til an empty location is found Name Using the alpha numeric keys Action Select Store then Enter This adds user data to the function menu using the alpha numeric keys This will appear as the 3rd line of user data on the systems user settings screen Execute Select execute then Enter data is now stored ...

Страница 63: ...ow keys increase or decrease until the number required is found Name The correct name should be displayed Action Select recall then Enter Execute Select execute then Enter which should now display the results In sweep mode selecting either graph or table will have the results displayed in the desired manner 8 13 Deleting Results Press the Prog key Displays the Program Store Recall screen ...

Страница 64: ...ts Location Using the Left Right arrow keys increase or decrease until the number required is found Name The correct name should be displayed Action Select delete then Enter Execute Select execute then Enter this should now display the name empty for that location number ...

Страница 65: ...r know how many data files are stored either internally or on the USB memory stick Storing data to the memory stick creates two files One file extension is pcs and is used by the software interface provided by Newtons4th Ltd The other file is a comma delimited text file with the txt extension Full information is provided in the appendix on this file format Note that 2GB is the maximum allowable si...

Страница 66: ...e rms at one point relative to another point The circuit can be characterised by computing the gain and phase at a number of points over a frequency range This gives results that show the transfer function of the circuit as a graph on the display The DFT analysis yields two components in phase and quadrature or a and b values from which the magnitude and phase can be derived Considering the compon...

Страница 67: ...components the magnitude and phase of each channel can be derived mag a12 b12 tan 1 b1 a1 The relative gain and phase of the circuitry under test at that particular frequency is derived from the real and quadrature components by vector division vector gain a jb ch2 a jb ch1 gain magnitude vector gain phase tan 1 b a vector gain The gain is usually quoted in dB dB 20 log10 gain To look at differenc...

Страница 68: ... specified with three parameters number of steps start frequency end frequency The Instrument computes a multiplying factor that it applies to the start frequency for the specified number of steps Note that due to compound multiplication it is unlikely that the end frequency will be exactly that programmed The frequency sweep is initiated by the START key and when completed the data can be viewed ...

Страница 69: ...alue or the result of the highest value less 20dB decade of frequency The vertical axis can be fixed to a manual scale using the menus The ZOOM function can be used to select up to four parameters from the display when in real time mode It has no function following a sweep Following a sweep the GRAPH key selects between graph of gain v frequency graph of phase v frequency graph of gain and phase v...

Страница 70: ... output phases Delay This determines the time between the input and output phases and considers this measurement to be the delay time Level The bottom left level displays the input rms voltage being fed into the system under test Note The output level of the generator when connected to one of the inputs may differ to the measurement reading on the FRA display This is apparent when the load isn t e...

Страница 71: ...output level and if the output is set to on INPUT area Displays the input channel selected When the INPUT displays anything but high it is in the terminate mode The inputs available are high and 50Ω MEASURE area Displays the measurement impedance reference and the speed of the measurement update ...

Страница 72: ...rns the signal generator on For impedance measurements normally the low output of the signal generator is fed into the high Z input and the circuit under test Through the internal shunt the instrument measures the current drawn from the signal generator while the input measures the voltage across the circuit being tested When sweeping across a band the instrument can detect up to two impedance pea...

Страница 73: ...le in degrees between the voltage and current phases Level is the rms voltage and current levels measured The other areas are GENERATOR area Displays the generator frequency the output level and if the output is set to on INPUT area Displays the input channel selected When the INPUT displays anything but high it is in the terminate mode The inputs available are high Z 50Ω 18 W low level and balanc...

Страница 74: ... derives the values ac dBm and crest factor The rms value of a periodic waveform v is given by 2 rms 1 2 v2 d 0 For a sampled signal the formula becomes i n 1 rms 1 n v2 i i 0 where n is the number of samples for an integral number of complete cycles of the input waveform These are fundamental definitions that are valid for all waveshapes For a pure sinewave the formulae equate to peak 2 but this ...

Страница 75: ...nt is simply the value with the largest magnitude Positive and negative peaks are independently filtered then the result with the largest magnitude is taken as the peak value In order to measure surge conditions the maximum instantaneous peak value unfiltered is also recorded It is important that the device does not auto range while measuring surge either set the range to manual or repeat the test...

Страница 76: ...data is missed is when an autozero measurement is requested this can be disabled in the SYSTEM OPTIONS menu if required The ZOOM function can be used to select any combination of up to four parameters from the display Note that the wideband nature of true rms measurements prevents the use of heterodyning so the frequency range of the measurement is limited to 5MHz To minimise noise there is a 50kH...

Страница 77: ...a sweep and can be adjusted by following the Keypad Operation instructions in section 4 1 Trigger mode Has three options auto normal and single shot Auto puts the oscilloscope in the auto run mode where the trace is synchronized to the trigger event However in this mode it draws a trace even if no trigger event is seen Normal Sets the trace to respond to each trigger event If there are no trigger ...

Страница 78: ...refore the waveform starts at the beginning of the trace 25 has a pre trigger time of a quarter of the mark space ratio time so the triggering edge of the waveform is displayed after the trace starts by 25 of the mark space ratio time This is also applicable for 50 and 75 depending on the pre trigger time required Traces Traces has three options single dual and ch2 current This selects either sing...

Страница 79: ...AL GENERATOR Generator Type Direct Digital Synthesis DDS Single Frequency or sweep Generator Waveforms Sinewave Square Triangle Ramp White Noise Frequency Accuracy 5ppm overall temperature range Magnitude Accuracy 5 10MHz 10 45MHz IMPEDANCE ANALYZER Impedance Range 100mΩ to 100KΩ Accuracy 0 5 2 MHz Frequency Range 5Hz to 5MHz Features LCR Measurements Inductance Capacitance Resistance Tan delta QF...

Страница 80: ...o 1000 analyzer setups readings and sweep results can be stored Interface USB RS232 LAN Real Time Clock Time and date stamp for data stores Data Storage Internal 1Gb flash external USB pen port Display and Resolution VGA Colour 6 digit frequency 5 digit voltage 4 digit dBm Power Source 9 18v 3A AC adapter or 12v dc from vehicle or external batteries Battery Type and capacity 3 x Lithium polymer up...

Страница 81: ...CSV and may be viewed using any text editing viewing program The text file has two parts the header section and the data results section The header includes the status of the instrument at the time the test results were taken This information includes all three USER data inputs from the USER SETTINGS menu the file name time and date stamp serial number last calibration date and other pertinent inf...

Страница 82: ...asurement impedance magnitude speed medium filter normal generator settings amplitude control V low output amplitude 2 0000E 00 Vrms amplitude step 1 1000E 00 fsk control disabled generator frequency 5 0000E 04 Hz frequency step 1 0000E 02 Hz waveform sinewave output low output impedance 50 Ohms input settings input high Z scale factor 1 0000E 00 CH1 input ranging full autorange sweep settings dis...

Страница 83: ...m the PROGRAM STORE RECALL menu These lines provide the number 000 to 999 of the file location the name of the file and the date and time stamp that was provided at the time the data was saved in the instrument Lines 14 to 17 are from the MEASUREMENT SETTINGS menu These lines provide the mode the instrument was in when the data was acquired how the measurement was taken and the speed and filter se...

Страница 84: ... 1331E 02 8 8875E 01 1 5960E 04 3 1337E 02 1 5612E 05 3 3274E 02 8 8739E 01 1 5113E 04 3 3282E 02 1 5735E 05 3 5461E 02 8 8583E 01 1 4334E 04 3 5471E 02 1 5857E 05 3 7929E 02 8 8400E 01 1 3579E 04 3 7944E 02 1 5980E 05 4 0746E 02 8 8190E 01 1 2898E 04 4 0767E 02 1 6102E 05 4 4011E 02 8 7904E 01 1 2031E 04 4 4040E 02 1 6225E 05 4 7794E 02 8 7612E 01 1 1468E 04 4 7835E 02 1 6347E 05 5 2246E 02 8 725...

Страница 85: ...3605E 01 4 2773E 03 4 7939E 02 1 9408E 05 4 4332E 02 8 3859E 01 4 1438E 03 4 4587E 02 1 9531E 05 4 1459E 02 8 4073E 01 4 0149E 03 4 1682E 02 1 9653E 05 3 8945E 02 8 4259E 01 3 8935E 03 3 9142E 02 1 9776E 05 3 6727E 02 8 4421E 01 3 7777E 03 3 6902E 02 1 9898E 05 3 4753E 02 8 4561E 01 3 6662E 03 3 4910E 02 2 0020E 05 3 2988E 02 8 4684E 01 3 5609E 03 3 3131E 02 2 0143E 05 3 1396E 02 8 4787E 01 3 4556...

Страница 86: ... 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 our products An example comment form can be found at the end of this manual if you have any comments or observations on the product please fill a copy of this form w...

Страница 87: ...nts serial number main release dsp release fpga release boot release press SYS then LEFT date your contact details comments detailed description of application or circumstances Please post or fax to Newtons4th Ltd ...

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