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Manual Anfatec PCI-Lockin Amplifier AMU5.0 – Rev. 1.01

Page 22 (34)

Figure 13: View options for the frequency sweep.

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Содержание AMU5.0-LIA

Страница 1: ...HZ TO 2 MHZ Anfatec Instruments AG Melanchthonstr 28 08606 Oelsnitz V Germany Tel 49 0 37421 24212 Tel 49 0 37421 24221 http www anfatec de email mailbox anfatec de Manual Anfatec PCI Lockin Amplifier...

Страница 2: ...the card 8 APIC configuration 8 LockIn Basics 9 The general idea of LockIn 9 Mathematical description 10 Noise Measurements 11 Example Electrical Force Microscope 12 Software description 14 Overview 1...

Страница 3: ...and brand names may be trademarks or registered trademarks of their respective owners Anfatec Instruments AG assumes no responsibility for any damage or loss resulting from use of this manual Anfatec...

Страница 4: ...t Uac 0 V 50 1 kHz 1 MHz 100 kHz high dynamic reserve 100 nVrms Hz0 5 typ 35 nV Hz0 5 100 kHz normal dynamic reserve 5 nVrms Hz0 5 typ 3 6 nV Hz0 5 100 kHz low noise 4 nVrms Hz0 5 typ 2 5 nV Hz0 5 Rol...

Страница 5: ...o get in trouble due to the users changes Most commercial software packages don t use this licence because they want to keep the right to sell the newer version later as update An open software can be...

Страница 6: ...R APIC CONFIGURATION The APIC improves the interrupt control in your system The APIC will dramatically increase the performance of the PC It is installed together with the Power Manager while Windows...

Страница 7: ...tor and call in the System control the topic system Chose the card hardware and open the device manager It shows all hardware components installed on your PC With a double click on the Anfatec Measure...

Страница 8: ...ource Code of the DLL in DLL DLLSourceXE7 Driver Installation Connect the USB lockin first If the system asks for a driver browse on the USB Stick for Driver version x86 for 32 bit or Driver version x...

Страница 9: ...shown Alle Hardwarekomponenten dieser Ger teklasse anzeigen It appears a list on the right sight which shows standard PC ACPI Uniprocessor PC and others Select now the ACPI Uniprocessor PC and say OK...

Страница 10: ...igure 9 shows that the amplitude at the input frequency is always measured with the same value For other frequencies the measured amplitude is dependent on the distance between the actual centre frequ...

Страница 11: ...can be developed into a Taylor Series Equ 1 For the value of Y at the time t all measurement values Y t detected in the period are used This period t should be a whole numbered multiple of 2pwref Due...

Страница 12: ...7 64 15 128 NOISE MEASUREMENTS Lock in amplifiers are capable to measure noise They detect a signal at a certain center frequency ref with an equivalent noise bandwidth For a Gaussian noise the equiv...

Страница 13: ...example about the local distribution of surface potentials on electronic devices or different dopant concentrations in semiconducting materials The fundamental experimental setup shown in Figure 6 is...

Страница 14: ...eparating the impact of these electrical forces from other forces e g van der Waals forces U has to be modulated at the frequency ref As a result of this the measurable photo detector signal is modula...

Страница 15: ...rs The menu line allows typical Windows functions while the button in the function line open new windows with specific functions FUNCTIONS IN THE MENU LINE FILE Exit Exit the program OPTION overload O...

Страница 16: ...ed PLL the frequency given in the frequency window is written in black VIEW It can be selected which of the meters is shown HELP About shows the current program version LockIn help calls the table of...

Страница 17: ...al scaling types 0 max the scaling is set to maximum value of the channel 0 fixed the maximum value can be changed by a slider appearing on the right sight of the scaling type selection 0 auto the pro...

Страница 18: ...maximum signal amplitude is then 10 V The normal input amplification is 10 which equals maximum signal amplitudes of 1 V When the low dynamic is chosen the resolution of the LockIn is highest but the...

Страница 19: ...saving and copying the acquired data can be changed in the option window WINDOW DESCRIPTION Delay is the time delay between each acquired data point During spectrum acquisition the frequency is set to...

Страница 20: ...a copied to the clipboard have an ASCII structure The data are written in lines each frequency value one line and delimited by the given delimiter TAB in the example are saved The frequency values are...

Страница 21: ...the right mouse button is used in the data screen of the Sweep Frequency window In the data screen several data curves can be displayed simultaneously Therein the History depth is the number of old cu...

Страница 22: ...Manual Anfatec PCI Lockin Amplifier AMU5 0 Rev 1 01 Page 22 34 Figure 13 View options for the frequency sweep...

Страница 23: ...ager there is no difference between PCI and PCIe card visible Use the driver version 8 0 0 2 dated 25th July 2018 Generate an icon link for each deveice on the desktop Right click on each icon to chan...

Страница 24: ...ew Devices Then a list of availabe Anfatec LockIn Devices is shown at the bottom of the user interface Select the device you like to address with this link If the Desktop link is started next time the...

Страница 25: ...ated in C Windows WORKING WITH THE DLL IN C PROJECTS Add the lib file genarated from the DLL to the project in Borland C Builder 5 0 by opening Project Add to Project see figure Chose the lockin lib a...

Страница 26: ...is OFF the return value equals the sent value If the PLL is ON this function can be used to read the external frequency value SetLockInAmpl sets the output amplitude of the reference output in V and g...

Страница 27: ...1 PLL off Time constant 1 ms RollOff 12 dB Input Gain 1 high reserve EXAMPLE PROGRAMS There are two program examples provided one in Borland Delphi 6 0 demo exe and one in Borland C Builder 5 0 They...

Страница 28: ...of the lockin Input Gain Time Constant and Roll Off are given as integers The relation between the value and the integer is described together with the DLL Frequency Harmonic Amplitude and Phase are o...

Страница 29: ...requency is monitored PROGRAMMING DIRECTIONS IN LABVIEW Switch into the diagram view of the vi files The parameters are set and read with the DLL functions or double click into these functions to open...

Страница 30: ...the spectrum is calculated based on the input parameters Start Frequency Stop Frequency and Number of Steps while the results are stored and displayed in a graphical window Manual Anfatec PCI Lockin A...

Страница 31: ...put_Lockin and Output_LockIn are used in the frequency sweep They only connect the numerical data and DLL function Manual Anfatec PCI Lockin Amplifier AMU5 0 Rev 1 01 Page 31 34 Figure 18 Diagram of t...

Страница 32: ...rd Installation 6 configuration 6 8 Connections to the card 8 Coupling 17 description 10 14 directions 26 DLL in C projects 22 DLL support 22 DLL Functions 23 Driver Installation 7 Dynamic 17 Example...

Страница 33: ...ements 11 Option 14 Options for the frequency sweep 19 Oscilloscope 15 Output 4 Parameter settings 16 Phase 18 PLL 4 Reference Output 4 requirements 6 Revision History 29 Revisions 29ff RollOff 17 set...

Страница 34: ...View 15 8 21 28 Manual Anfatec PCI Lockin Amplifier AMU5 0 Rev 1 01 Page 34 34...

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