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N4L SFRA45 User Manual

Sweep frequency response analyzer
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SFRA45
USER MANUAL
Version2.10 November 2018

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  • Page 1 SFRA45 USER MANUAL Version2.10 November 2018...
  • Page 2 Do not be hasty when making measurements.” “ The SFRA455 is a precision instrument 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.
  • Page 3 SFRA45 User Manual IMPORTANT SAFETY INSTRUCTIONS This equipment is designed to comply with BSEN 61010-1 (2010) (Safety requirements for electrical equipment for measurement, control, and laboratory use) – observe the following precautions:  Keep the ventilation holes on the underneath and rear free from obstruction.
  • Page 4 SFRA45 User Manual DECLARATION OF CONFORMITY We declare that the product: Description: Sweep Frequency Response Analyser Model: SFRA45 Conforms to the EEC Directives: 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: -5⁰...
  • Page 5 SFRA45 User Manual WARRANTY This product is guaranteed to be free from defects in materials and workmanship for a period of 36 months from the date of purchase. In the unlikely event of any problem within this guarantee period, first...
  • Page 6 SFRA45 User Manual ABOUT THIS MANUAL This manual describes the general features, usage and specifications of the SFRA45 (Sweep Frequency Response Analyzer) Detailed descriptions of the communications command set for RS232, USB and LAN is given in the separate manual “SFRA45”...

  • Page 7: Table Of Contents

    SFRA45 User Manual CONTENTS Introduction – general principles of operation ..1-1 SAFETY ............. 2-1 Getting started ..........3-1 Quick Start guide ..........4-1 Operating Mode Keys ..........4-1 Menu Control Keys ..........4-2 Display Control Keys ..........4-3 Setup Keys/Keypad ..........4-4 Control Keys ............
  • Page 8 SFRA45 User Manual AUX KEY ..............8-9 OUTPUT KEY ............8-10 Input Channels ............. 8-11 System Key Functions ........... 8-14 8.10 Prog Key Functions ..........8-17 8.11 Storing Results ............. 8-18 8.12 Recalling Results ........... 8-20 8.13 Deleting Results ............ 8-20 8.14...
  • Page 9 SFRA45 User Manual APPENDICES Appendix A Accessories Appendix B Serial command summary Appendix C Available character set Appendix D Configurable parameters Appendix E Contact details...

  • Page 10: Introduction - General Principles Of Operation

    SFRA45 User Manual Introduction – General principles of operation The SFRA45 Selective Level Meter is designed to provide a single instrument solution for multiple applications in the Power Transformer industry and specifically the Power Testing Systems environment. Features include: ...

  • Page 11: Safety

    SFRA45 User Manual SAFETY READ THIS GUIDE AND SAFETY INFORMATION BEFORE USING THE INSTRUMENT.  Only use the instrument under the conditions and purpose for which it is intended.  Ensure that the AC supply Voltage and the power pack supplied are at the same ratings.

  • Page 12: Getting Started

    SFRA45 User Manual Getting started The SFRA45 is supplied ready to use – it comes complete with an appropriate power lead and a set of test leads. It is supplied calibrated and does not require anything to be done by the user before it can be put into service.
  • Page 13 SFRA45 User Manual Weight 5.7” Colour 2.7 Kgs Display to ~5 lbs maximize Visibility in Operates from an conditions internal rechargeable Lithium Ion Battery, an AC/DC Power Source or an external 12V Vehicle Battery Rugged Tablet Style metal casing Dimensions ideal for field 12”...
  • Page 14 SFRA45 User Manual The instrument can be powered by multiple sources; directly from the AC/DC Adapter, from the internal battery source (Lithium polymer batteries) or directly through the DC input, (9-18V @ 3A source required). The instrument is shipped with a 6-metre power adapter lead that permits use through a vehicle DC source outlet socket.
  • Page 15 SFRA45 User Manual  When charging - blue with >>>>.  When finished charging, but power connected- blank.  If batteries get too hot, charging is suspended - red with XXXX Changing the batteries - Only qualified personnel, trained and knowledgeable in electronic instrument repair and safety, having read this guide should attempt to change the batteries.
  • Page 16 SFRA45 User Manual Communication and Power Panel Ventilation RS232 USB Port Power (Memory Inlet Stick) Power Button...
  • Page 17 This section provides guidance in order to capture signals which are unknown in amplitude.  Switch on the SFRA45 unit. The display should illuminate with the model name and the firmware version for a few seconds while it performs initial tests.

  • Page 18: Quick Start Guide

    SFRA45 User Manual Quick Start guide Operating Mode Keys The operating Mode Keys: FRA, LCR, RMS, SCOPE allow direct access to the main operating modes of the instrument FRA – Frequency Response Analyzer - Selects the Frequency Response Analyzer Mode.

  • Page 19: Menu Control Keys

    SFRA45 User Manual Menu Control Keys ENTER/NEXT confirms your selection or parameter value/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.

  • Page 20: Display Control Keys

    SFRA45 User Manual Display 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...

  • Page 21: Setup Keys/Keypad

    SFRA45 User Manual Setup Keys/Keypad SELECT MENUS for non mode-specific configuration. Also, use as numeric keypad when entering parameter values or data. Data acquisition parameters (speed, ACQU filtering) SWEEP Frequency Sweep Control TRIM Generator Trim Control COMMS Communications Option Signal Generator Control...

  • Page 22: Control Keys

    SFRA45 User Manual Control Keys START & STOP (used for Sweeps). Either key also triggers single-shot in SCOPE mode. Use ZERO key for:  LCR Mode provides zero compensation information and is used to remove the capacitive element of test leads from the measured impedance.

  • Page 23: Data Entry Guide

    (Values may be overwritten, or edited by use of the R, L and DELETE keys) 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.
  • Page 24 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”...
  • Page 25 SFRA45 User Manual Check Sweep Parameters Pressing the “SWEEP” button opens the sweep menu, default sweep parameters have been chosen 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”...
  • Page 26 SFRA45 User Manual Turn Generator ON Pressing the “OUTPUT” menu will enable you to change the generator settings and turn the generator on. The default generator signal level is 10Vpk, 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.
  • Page 27 SFRA45 User Manual (Note 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.

  • Page 28: Using The Menus

    SFRA45 User Manual Using the menus The SFRA45 is a very versatile instrument with many configurable parameters. These parameters accessed from the front panel via a number of menus shown in the table below Data acquisition parameters (speed, ACQU filtering)
  • Page 29 SFRA45 User Manual Pressing the HOME key first time reverts to the opening state 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.

  • Page 30: Selection From A List

    SFRA45 User Manual Selection from a list This data type is used where there are only specific options available such as the smoothing may be ‘normal’, ‘slow’, or ‘none’, the graph drawing algorithm may use ‘dots’ or ‘lines’. When the flashing cursor is highlighting the parameter, the RIGHT key steps forward through the list and the LEFT key steps backwards through the list.

  • Page 31: Numeric Data Entry

    SFRA45 User Manual Numeric data entry Real numbers are entered using the number keys, multiplier keys, decimal point key, or +/- key (if signed value is permitted). When the character string has been entered, pressing the ENTER key sets the parameter to the new value.

  • Page 32: Special Functions

    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.
  • Page 33 SFRA45 User Manual The program menu is accessed using the PROG key. The program location can be selected either by stepping through the program locations in turn to see the name or by entering the program number directly. When storing a configuration in a program, there will be a short pause of about 1 second if the program location had previously been written or deleted.

  • Page 34: Zero Compensation

    SFRA45 User Manual Zero Compensation There are 2 levels of zero compensation: Trim out the dc offset in the input amplifier chain. Measure any remaining offset and compensate. The trim of the dc offset in the input amplifier chain can be manually performed with the ZERO key, or over the RS232 with the REZERO command.
  • Page 35 SFRA45 User Manual 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.

  • Page 36: Using Remote Control

    (line feed ignored) and line feed All the functions of SFRA45 can be programmed via any of the interfaces, and results read back. The commands are not case sensitive and white space characters are ignored (e.g. tabs and spaces). Replies from the SFRA45 are always upper case, delimited by commas.
  • Page 37 *ESR? (see section 5.1). SFRA45 also maintains a status byte consistent with the requirements of the IEEE488.2 protocol, that can be read either with the IEEE488 serial poll function or by the mandatory command *STB? over RS232 or USB or LAN (see section 5.2).

  • Page 38: Standard Event Status Register

    SFRA45 User Manual Standard event status register bit 0 OPC (operation complete) cleared by most commands set when data available bit 2 QYE (unterminated query error) set if no message ready when data read bit 3 DDE (device dependent error)

  • Page 39: Serial Poll Status Byte

    SFRA45 User Manual Serial Poll status byte bit 0 RDV (result data available) set when results are available to be read as enabled by DAVER bit 2 FDV (fast data available (streaming)) set when data streaming results are available to be read as enabled by DAVER...

  • Page 40: Rs232 Connections

    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 SFRA45 to a PC, use a 9 pin female to 9 pin female null modem cable: 1 & 6...

  • Page 41: Rs232 Printer

    SFRA45 User Manual RS232 printer The RS232 port can also be connected to a serial printer for making a hard copy of any screen. 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.

  • Page 42: System Options

    SFRA45 User Manual System options Press SYS to access the system options. Measurements of phase can be expressed in one of three conventional formats: -180 to +180 (commonly used in circuit analysis) 0 to -360 (commonly used in power applications) 0...

  • Page 43: User Data

    These cannot be changed by the user. User data The SFRA45 can be personalised by entering up to 3 lines of user data as text (see section on text entry). User data is displayed every time that the instrument is switched on to identify the instrument.

  • Page 44: Setup / Key Functions

    SFRA45 User Manual Setup / Key Functions Acquisition Mode (ACQU) In normal acquisition mode the window over which the measurements are computed is adjusted to give an integral number of cycles of the input waveform. The results from each window are passed through a digital filter equivalent to a first-order RC low pass filter.
  • Page 45 SFRA45 User Manual Minimum Cycles – There is also an option to set a specific size of the window to a value other than the preset options. In order to synchronise to an integral number of cycles, the window size is either reduced by up to 25% or increased as necessary.

  • Page 46: Sweep Mode / Key (Sweep)

    SFRA45 User Manual Sweep Mode / Key (SWEEP) All ac measurements using the SFRA45 generator can be swept across a frequency range. The start frequency, stop frequency and number of steps up to 2000 can be specified. The measurements are subjected to the same speed constraints set in the ACQU menu, but the filtering does not apply on each measurement point.
  • Page 47 SFRA45 User Manual Peak Hold – Has two options “on” and “off”. However, it is only operational when the “continuous sweep” option is selected. As the sweeps continue this allows the present sweep readings to be compared against the previous readings which then determines the highest level reached.
  • Page 48 SFRA45 User Manual The graph is normal scaled to +100dB and -22dB, this can be manually set to other values or set to auto-scale. A vertical marker can be placed on the graph to reference a specific frequency. Up to 30 sweeps may be stored in non-volatile memory using the PROG key.

  • Page 49: Trim Mode (Trim)

    SFRA45 User Manual Trim mode (TRIM) The trim function is a powerful and versatile feature that allows closed loop control of the generator amplitude. It allows a specific measurement to be programmed for either CH1 and CH2 and the generator output will be adjusted to maintain the measured voltage or current.

  • Page 50: Comms Key (Comms)

    SFRA45 User Manual Comms Key (COMMS) Resolution – Has two options: “normal” and “high” this alters the number of digits being displayed. Interface - Has three options: “RS232”, “USB” and “LAN” depending on the interface the user requires to connect the instrument with.
  • Page 51 SFRA45 User Manual Power Transformers: In this mode, the measurement results will be stored in XML format which fully complies with IEC60076-18. This standard is applicable to power transformers, reactors, phase shifting transformers and similar equipment. Transformer Setup Identifier – sequence of letters and/or numbers to...

  • Page 52: Aux Key

    SFRA45 User Manual Fluid Filled – Has two options – “yes” or “no”. Yes or No depending on whether the test object was fully filled with normal operating fluid during measurement. AUX KEY This is for the Auxiliary Port Settings and is for future...

  • Page 53: Output Key

    SFRA45 User Manual OUTPUT KEY The Output key controls the Signal Generator. The signal generator is a Direct Digital Synthesis (DDS) single or sweep frequency generator. It generates Sine, Square and Triangular waveforms over a frequency range from 5Hz to 45MHz, together with a noise option.

  • Page 54: Input Channels

    SFRA45 User Manual Waveform – Has five options: “sinewave, squarewave, triangle, ramp and white noise”. The use and selection of the different waveforms are dependent on user need. Generator Frequency - This function determines the generator output frequency. “Frequency Step”...
  • Page 55 SFRA45 User Manual extend by approximately 50%. This gives the following ranges: range reference nominal full scale wideband selective 3.16mV 10mV 10mV 15mV 30mV 31.6mV 50mV 100mV 100mV 150mV 300mV 316mV 500mV 1.5V 3.16V maximum input signal that accurately measured varies with frequency:...
  • Page 56 SFRA45 User Manual There is also an option to auto range ‘up only’ so that a test may be carried out to find the highest range. Once the highest range has been determined, the range can be set to manual and the measurement made without losing any data due to range changing.

  • Page 57: System Key Functions

    SFRA45 User Manual System Key Functions Language – These menu options depend on the (Country) firmware loaded, ie Italy will provide a choice of Italian or English etc. Initial settings – This setting has three options which set the instrument initial settings at switch on. These are either the settings stored in memory program 1, as per the factory default or the settings which were last used.
  • Page 58 SFRA45 User Manual input current and voltage. This phase angle has three options: “-180° to +180°”, “0° to -360°” or “0° to +360°” depending on user preference. Keyboard Beep – An audible ‘beep’ is available and sounds every time a key is pressed. This option can be “enabled”, or “disabled”...
  • Page 59 SFRA45 User Manual USER SETTINGS User data Newtons4th Ltd User data User data save Figure 14.1 (Main Settings) USER SETTINGS User data Power Station XYZ User data Line 2 User data Will Power save Figure 14.2 (example data) Data Screen – The instrument Data screen is accessed by pressing the “System Key”...

  • Page 60: Prog Key Functions

    SFRA45 User Manual 8.10 Prog Key Functions Allows the user to internally or externally store and recall instrument setups and readings. It has the following functions: “memory”, “file type”, “action”, “location”, “name” and “execute”. The memory information in red at the bottom of the screen displays, “memory status”, available files”...

  • Page 61: Storing Results

    SFRA45 User Manual Action – Action has three options: “recall”, “store” and “delete”. While previously selecting “program” or “results” from the “data” function, the user must decide whether to recall, store or delete the data. When storing, up to 999 setups/readings can be saved and each must have a unique number.
  • Page 62 SFRA45 User Manual Location:  Using the Left/Right arrow keys increase or decrease the number until 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...

  • Page 63: Recalling Results

    SFRA45 User Manual 8.12 Recalling Results Press the “Prog” key  Displays the “Program Store/Recall” screen. Memory:  Select “internal”. File type:  Select “results”. Location:  Using the Left/Right arrow keys increase or decrease until the number required is found.
  • Page 64 SFRA45 User Manual Memory:  Select “internal”. File type:  Select “results”. 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.

  • Page 65: Memory Status

    SFRA45 User Manual 8.14 Memory Status (Displayed In Red) – “Memory status” monitors one of two items. It lets the user know how much memory is available either internally or on the USB memory stick. The ‘available files’ function lets the user know how many data files are stored either internally or on the USB memory stick.

  • Page 66: Frequency Response Analyzer

    SFRA45 User Manual Frequency Response Analyzer The instrument measures the gain and phase of channel 2 relative to channel 1 using a discrete Fourier transform (DFT) algorithm at the fundamental frequency. The DFT technique can measure phase as well as magnitude and is inherently good at rejecting noise –...
  • Page 67 SFRA45 User Manual For a sampled signal, the formulae become: i = n-1 a1 = 1/n  v[i].cos(2ci/n) i = 0 i = n-1 b1 = 1/n  v[i].sin(2ci/n) i = 0 where n is the number of samples for an integral number of complete cycles of the input waveform, and c is the number of cycles.
  • Page 68 SFRA45 User Manual offset gain = measured dB – offset dB The filtering is applied to the real and quadrature components individually, rather than derived magnitude and phase values. This gives superior results as any noise contribution to the components would have random phase and therefore would be reduced by filtering.
  • Page 69 SFRA45 User Manual comprises a single window without any filtering unless repeat sweep is selected. The top of the vertical axis for the graph is normally set to be the highest measured value during the sweep. The bottom of the vertical axis is normally either set to the lowest measured value or the result of the highest value less 20dB/decade of frequency.

  • Page 70: Fra) Screen Display Areas

    SFRA45 User Manual (FRA) Screen Display Areas The main area shows “frequency”, “gain”, “phase” and “delay” measurements as follows: “Frequency”: This is the frequency the generator has been set to. “Gain”: Shows the measured amplification/attenuation between the input and output.
  • Page 71 SFRA45 User Manual 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’...

  • Page 72: Impedance Mode

    SFRA45 User Manual 10 Impedance Mode The meter is used to measure the impedance of different circuits and can range from 100mΩ to 100kΩ. Typically used in power line carrier applications, this could be a line trap or parallel L/C in a line tuner etc.

  • Page 73: Lcr) Screen Display Areas

    SFRA45 User Manual 10.1 (LCR) Screen Display Areas The main area shows “frequency”, “impedance”, “phase” and “level” measurements as follows: “Frequency”: is the frequency the generator is currently running at. “Impedance” is the value (Ω) measured as a ratio of the voltage and phase angles.

  • Page 74: Ac Rms Mode

    These are fundamental definitions that are valid for all waveshapes. For a pure sinewave, the formulae equate to peak/2, but this cannot be applied to other waveshapes. The SFRA45 computes the true rms value from the fundamental definition for sampled data. 11-1...
  • Page 75 SFRA45 User Manual dc = 1/2  v() d Having computed the true rms and the dc component, the ac component can be derived from: = ac + dc => = rms – dc The ac component is also expressed in dB referred to 1mW into 600...
  • Page 76 SFRA45 User Manual The measurements are computed over rectangular windows with no gaps. The processing power of the DSP allows the measurements to be made in real time without missing any samples. In this way, the measured rms is a true value even if the signal is fluctuating.

  • Page 77: Oscilloscope Mode

    SFRA45 User Manual 12 Oscilloscope Mode. The oscilloscope is can be either single or dual trace and has a sample rate of 5Msamples/s and a time base sweep of 5µs/div to 5s/div, this provides the user with a convenient tool for displaying and analyzing input waveforms.
  • Page 78 SFRA45 User Manual Selecting ‘falling edge’, sets the oscilloscope to start the sweep when the trigger voltage goes negative. Pre-trigger – Has four options: ‘none’, ‘25%’, ‘50%’ and ‘75%’. This determines the amount of pre-trigger or waveform display delay based on the mark/space ratio time of the waveform.

  • Page 79: Technical Specifications

    SFRA45 User Manual 13 Technical Specifications AC RMS Channels 2 (Ground Referenced) Measurement AC RMS, dbm, peak, cf, surge Frequency 5Hz to 5MHz Inputs (Unbalanced) Type & Ground Referenced BNC Connection Input Impedance 1M or 50 Ohms (selectable) Accuracy (ac) 0.05% range + 0.05% reading +...
  • Page 80 SFRA45 User Manual FREQUENCY RESPONSE ANALYSER Frequency Range 5Hz to 45MHz 0.02dB < 50KHz 0.02dB + 0.05dB/MHz < 5MHz Gain Accuracy dB 0.1+0.04dB/MHz < 45MHz Phase Accuracy° 0.05° < 10KHz 0.007°+0.0009°/KHZ<5MHz 5.05+0.0001*/KHz<45MHz GENERAL SPECIFICATIONS Sweep Steps Up to 2000 steps in all sweep...

  • Page 81: Appendix A - Text File Format

    SFRA45 User Manual 14 Appendix A – Text File Format Saving test results generates two files. The file name is represented by the number location chosen (1-999) from the ‘PROGRAM STORE/RECALL’ menu. For example, if the file location chosen is: 11, the files generated would be PCA_R011.pcs and PCA_R011.txt.Each file has the same...

  • Page 82: Example Text File

    SFRA45 User Manual 14.1 Example Text File NEWTONS4TH LTD Instrument,type,SFRA45 ,serial number,1216 ,firmware version,2.13 ,calibration,10_DEC_2008_1029_SBC User ID ,user name 1,PowerComm Solutions ,user name 2, ,user name 3,John Doe Record,file name,PCA_R011.TXT ,name,Test ,datestamp (mmddyyyy),05262009 ,timestamp,1132 measurement settings,mode,impedance meter ,measurement,impedance magnitude ,speed,medium...

  • Page 83: Text File Header Format Explanation

    SFRA45 User Manual 14.2 Text File Header Format Explanation  The first line ‘NEWTONS4TH LTD’ is the name of the company that manufactures the instrument and is embedded in the firmware.  Lines two to five are the serial number of the...

  • Page 84: Text File Example Sweep Data

    SFRA45 User Manual 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).
  • Page 85 SFRA45 User Manual 1.8061E+05, 1.9707E+03,-7.1084E+01, 6.0789E+03,-2.0832E+03 1.8184E+05, 1.5017E+03,-7.5157E+01, 5.8618E+03,-1.5535E+03 1.8306E+05, 1.2105E+03,-7.7630E+01, 5.6503E+03,-1.2393E+03 1.8429E+05, 1.0138E+03,-7.9289E+01, 5.4552E+03,-1.0318E+03 1.8551E+05, 8.7227E+02,-8.0463E+01, 5.2643E+03,-8.8450E+02 1.8674E+05, 7.6550E+02,-8.1345E+01, 5.0871E+03,-7.7432E+02 1.8796E+05, 6.8228E+02,-8.2022E+01, 4.9162E+03,-6.8895E+02 1.8918E+05, 6.1556E+02,-8.2563E+01, 4.7553E+03,-6.2078E+02 1.9041E+05, 5.6086E+02,-8.3000E+01, 4.6022E+03,-5.6507E+02 1.9163E+05, 5.1521E+02,-8.3355E+01, 4.4521E+03,-5.1870E+02 1.9286E+05, 4.7641E+02,-8.3605E+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...

  • Page 86: Appendix A - Contact Details

    SFRA45 User Manual Appendix A – Contact details Please direct all queries or comments regarding the SFRA45 instrument or manual to: Newtons4th Ltd. 1 Bede Island Road Leicester LE2 7EA United Kingdom Tel: (0116) 230 1066 international +44 116 230 1066...
  • Page 87 SFRA45 comments serial main release: date: number: dsp release: fpga release: boot release: (press SYS then LEFT) your contact details: comments: detailed description of application or circumstances: Please post or fax to Newtons4th Ltd.

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