Anfatec eLockIn 203 Скачать руководство пользователя страница 42

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http://192.168.1.7/setup/lockin.ini

This file contains:

Amplitude: 0.0200

Frequency: 1001.00

Timeconstant: 9

Rolloff: 24

InputRange: 1

Phase: 10.0

Harmonic: 1

AmplCaretPos: 3

FreqCaretPos: 4

FreqCaretPosTail: 2

PhaseCaretPos: 5

DisplayChannel: 2

Channel1Type: 3

Channel1Range: 120

Channel2Type: 4

Channel2Range: 7

Channel3Type: 26

Channel3Range: 120

Channel4Type: 27

Channel4Range: 7

InputCouple: 0

InputMode: 2

RefInFlag: 0

TimeConstLoL: 6

RollOffLoL: 24

SyncLoL: 0

Sync0: 0

Phase0: 0.0

EndOK

Frequency and amplitude are given as values in Hz and in V, respectively, while the
phase is shown in degree. All other data are stored in the numeric code provided in the
tables 2 through 9 on the pages 36 to 37.

Additionally, the state of the internal overload is provided by sending:

http://192.168.1.7/cgi-bin/remote.cgi

As result, the eLockin sends
“idle 0”

if no overload is active

“idle 1”

if the frequency range is exceeded (blue exclamation mark)

“idle 2”

if the AD-converter input is in overlaod (red exclamation

mark)
“idle 3”

if both overload states are active.

4.1.9 E

XAMPLE

ROGRAM

: L

EMOTE

LockInRemote is an example program written in Borland Delphi 6 and designed to show
the possibilities of remote-controlling an

eLockIn

. Its graphical user interface (GUI)

looks similar to the front panel and each button works the same way the real one does.

42 (58)

Содержание eLockIn 203

Страница 1: ...IER 10 10 m mH HZ Z TO TO 250 250 k kH HZ Z S SPECTRUM PECTRUM A ANALYZER NALYZER D DATA ATA A ACQUISITION CQUISITION D DIGITAL IGITAL O OSCILLOSCOPE SCILLOSCOPE November 2014 Anfatec Instruments AG M...

Страница 2: ...Stop 26 3 3 2 Display Spectra Display 26 3 3 3 Acquire Spectra Acquire 27 3 3 4 Save Spectra Save 28 3 4 Oscilloscope Scope 28 3 4 1 Run Stop Scope Run or Scope Stop 28 3 4 2 Display Scope Display 29...

Страница 3: ...anual uses the following style declarations to visualize certain meanings This style describes shortly how to reach a parameter in the menus The list of buttons to be pressed is written usually in the...

Страница 4: ...use of this handbook Anfatec Instruments AG assumes no responsibility for any damage or loss resulting from use of the software Anfatec Instruments AG assumes no responsibility for any damage or loss...

Страница 5: ...ously Mode A B after a first amplification the difference between A and B is formed electronically The resulting signal A B is given to both AD converters simultaneously Mode A B the two inputs are am...

Страница 6: ...rs extend the time constant range up to 1 ks The user has access to all lock in inputs and lock in outputs as well as to 8 additional analogue input channels AUX In which are converted with 24 bit 40...

Страница 7: ...ntial A B Input Coupling DC or AC f 3dB 2 Hz Damage Threshold 12 V Full Scale Input Ranges 3 6 Vrms 360 mVrms 35 mVrms Roll Off 6 dB oct 12 dB oct 24 dB oct Time Constants 0 1 ms to 1 ks in1 2 5 steps...

Страница 8: ...the TTL Ref output see Appendix Internal Oscillator 10 mHz 250 kHz Internal Frequency Resolution 3 mHz Frequency Accuracy 50 ppm from 0 C to 70 C Reference Output Voltage 0 1 mVrms 7 Vrms Output Nois...

Страница 9: ...in channels of 2nd input RB XB YB in A B Rn n Xn Yn in A A B Mathematical Channel Noise Maximum Number of Simultaneously Displayed Channels 4 Sampling Rate 39 062 kHz 1 2 3 AUX IN Number of Available...

Страница 10: ...easuring equipment After multiplication the resulting signals are low pass filtered and provide now information about the real part X and the imaginary part Y of the analyzed signal relating to the ph...

Страница 11: ...the frequencies m ref S m ref k 0 s k v0 v1 k k Km k 3a with Km k 1 2 2 cosk ref t e i m ref t dt 3b Although the factors Km k converge to zero for k to infinity some factors remain different from ze...

Страница 12: ...lifier is plotted in dependence on ref for different values of damping Roll Off 6 dB octave 12 dB octave and 24 dB octave The time constant has been kept constant For a damping of 6 dB oct the measure...

Страница 13: ...rmined by the time constant and the slope of the used Butterworth filter It is calculated by Bn 0 1 1 2n d 4 The normalized Butterworth filter noise bandwidths are Filter order Bandwidth 1 1 570796 2...

Страница 14: ...over the surface by means of a piezo scanning device The distance between tip and sample can be controlled by monitoring the oscillation amplitude of the cantilever because its value is influenced by...

Страница 15: ...able photo detector signal is modulated too Inserting equation 6 in 5 and using power reduction formulas of trigonometric functions one can expect a force between tip and sample at the frequency ref a...

Страница 16: ...urned counterclockwise the selected parameter will be decreased Use the pushbutton in the knob to switch between menu meanings Up Down These two buttons increase decrease the value of the selected par...

Страница 17: ...effect 3 1 2 SCREEN ORGANIZATION The screen is divided into three parts the main screen the menu display and the parameter display While the menu display helps to navigate through the parameter menus...

Страница 18: ...ine and Display in the third line When now Input is selected the menu items will change to Range in the first Couple in the second Time in the third and Slope in the fourth line Out of these four item...

Страница 19: ...h entry in the menus follow the manual structure starting with the LockIn menu in section 3 2 19 58 Figure 9 Menu structure of the Spectra mode Dest Save Name Axis Color Type Offset Spectra Run Displa...

Страница 20: ...ockIn Input Range This setting changes the input amplification of the lock in input stage by two hardware switches controllable from the software These factors are according to the range value of high...

Страница 21: ...ength This allows a time optimized data acquisition at low frequencies The sync filter produces an output which contains steps Example at 1 kHz frequency with Sync 1 one gets a new output value exactl...

Страница 22: ...ow pass filtering The eLockn employs a Butterworth type low pass filter Together with the Slope which is nothing else than the order of the low pass filter the bandwidth and the raise time of the filt...

Страница 23: ...ly and fed into the two inputs ADC1 and ADC2 One measures with two phases at the input A and with two further phases at the input B Both inputs operated at the same frequency 1st or higher harmonic wi...

Страница 24: ...splay shows the locking frequency as PLL frequency value In case the reference input is Off the frequency value shown in the parameter display is the frequency of the internal reference 3 2 3 DISPLAY...

Страница 25: ...d to this display range Example If channel 1 displays the lock in amplitude R and its range is set to 1 mV a detected amplitude R of 1 mV gives an output value of 10 V at the DA1 rear panel If the sig...

Страница 26: ...3 1 RUN STOP SPECTRA RUN OR SPECTRA STOP The first menu item in the menu toggles the state of the instrument in Spectra mode To Start the spectrum acquisition press button 1 see Figure 6 when the node...

Страница 27: ...pectrum acquisition which allows to repeat acquisition automatically continuous or to sum up spectra integrated Type Spectra Acquire Type This parameter has three options Single The specified spectrum...

Страница 28: ...tem Choose a File Name Spectra Save Name The file name is not dependent on the storage medium When a storage medium is selected the directory data will be created in the root directory of the storage...

Страница 29: ...is ScaleV All channels use the same time axis This node shows the display scale of the selected channel The units are dependent on the source of the channel and counted in divisions of the screen In...

Страница 30: ...entries Beep On Off This beep can help to identify a range overflow of the input channel TimeOut The time given here is related to an internal timer and connected to several time dependent functions...

Страница 31: ...s default settings 3 8 FTP DATA ACCESS Note The FTP server is not active in the current version of the eLockIn software For instruments with an older software version The easiest way to use ftp access...

Страница 32: ...might occur if USB flash drives are used This error is caused by a problem in the linux operation system It is not able to mount all types of USB flash drives When a certain type was mounted mounting...

Страница 33: ...can be found in subdirectory directory in the web server s main directory In a web browser this file could be accessed by entering 192 168 1 7 directory filename into the address bar 192 168 1 7 woul...

Страница 34: ...assume a TCP connection has already been established between the remote computer and the eLockIn on port 80 default for http connections and the user has identified himself as described in the Authen...

Страница 35: ...values can be adjusted either by using buttons or by sending numbers to the eLockIn The device accepts numbers wherever the software expects user input Just like the other commands numbers need to be...

Страница 36: ...y InputRange Key Code 899_ _ Number Value 0 dc coupled 1 ac coupled 2 dc 50 Ohm 3 dc 50 Ohm Table 3 Menu Entry LockIn Input Couple lockin ini entry InputCouple Key Code 89D_ _ Number Value 6 6dB oct 1...

Страница 37: ...D_0_9_ _ or 895D_0_5_ _ Number Value 0 or 1 1st harmonic 2 2nd harmonic 15 15th harmonic Table 8 Menu Entry LockIn Ref Harm lockin ini entry Harmonic Key code 8D1_ _ Number Value 0 RefIn OFF 1 RefIn O...

Страница 38: ...splay Menu Entry LockIn Display for the signals AD1 to AD8 Key code 859_channel_1_ _ Number Value 100 10 nV 101 20 nV 102 50 nV 103 100 nV 104 200 nV 105 500 nV 106 1 V 107 2 V 108 5 V 109 10 V 110 20...

Страница 39: ...able 18 Menu Entry Scope Display Scale Key Code 4D9_Channel_D_ _ this does not work when the channel displays a phase signal or other special signals Number Value 0 1 s 1 2 s 2 5 s 3 10us 4 20us 5 50...

Страница 40: ...following 1040 is the new frequency value in Hz 1 04 kHz _ finalizes the data transfer never forget this final underscore Set Reference Output Amplitude Code http 192 168 1 7 cgi bin remote cgi 8D9_0...

Страница 41: ...s the length of the complete string which is about 128 characters Example Code http 192 168 1 7 cgi bin remote cgi 859_0_1_124_9_1_1_124_9_2_1_124_9_3_1_124_ Function sets the display ranges of all 4...

Страница 42: ...hown in degree All other data are stored in the numeric code provided in the tables 2 through 9 on the pages 36 to 37 Additionally the state of the internal overload is provided by sending http 192 16...

Страница 43: ...to navigate through the menu tree Auto Refresh Channel displays current channel data Auto Refresh Off disables Auto Refresh It is possible to get new screen channel data by refreshing them manually as...

Страница 44: ...ted by the dll are described in the following table Name Input Output Description _Init IP address type pChar No Return value Initializes the eLockIn by calling the current IP address IT IS ABSOLUTELY...

Страница 45: ...to send any Key Code see paragraph 4 1 3 and 4 1 4 to the device so that any function can be called with the DLL In order to obtain values from channel 2 to 4 one has to call channel 1 first because...

Страница 46: ...he eLockIn under LabView one can use the DLL functions or one can address the eLockIn via TCP IP or VISA communication For the DLL based access the following programs are provided eLockin dll provides...

Страница 47: ...purple Data input thin purple GET setup lockin ini CR CR outputs Connection ID output thin green Error Output Fehlerausgang fat purple TCP Read TCP Lesen inputs Connection ID thin green Error input fa...

Страница 48: ...y The other two functions of this Sub VI phase and harmonic are not used here Step 2 A curve diagram is drawn with 100 values which are taken from the Sub VI Get_eLockin vi which uses the function cal...

Страница 49: ...nel are counted from zero while the labeling at the backside of the instrument count the AuxOut Pins from One Therefore the 5th output named DA5 in the software is addressed from Channel 4 Remark In o...

Страница 50: ...tions against power failure are done follow these steps Unpack the software update Create a directory update case sensitive in the root on a USB stick Copy all data into this directory Plug the USB St...

Страница 51: ...6 REVISION HISTORY 6 1 MANUAL REVISIONS This Manual is dated 11 14 14 6 2 HARDWARE REVISIONS The current hardware revision is 29 6 3 SOFTWARE REVISION The current software revision is 1 15a 51 58...

Страница 52: ...7 APPENDICES 7 1 SCHEMATIC DIAGRAM OF THE SIGNAL PATHS 52 58...

Страница 53: ...7 2 DIAGRAM OF THE LOCKIN AMPLIFICATION PATHS Diagram of the preamplifier switches 53 58...

Страница 54: ...7 3 FRONTPANEL DIMENSIONS 54 58...

Страница 55: ...7 4 INSTRUMENT SPECIFIC TEST SHEETS insert with 10 pages of data 55 58...

Страница 56: ...7 5 PREAMPLIFIER CONNECTOR PINOUT 56 58...

Страница 57: ...t Anfatec certifies above instrument meets or exceeds published measurement specifications and has been calibrated using standards traceable to the PRC National Institute of Metrology NIM and or other...

Страница 58: ...7 7 TRACEABILITY CHART 58 58...

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