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Saluki SE1022 User Manual

Digital lock-in amplifier
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SE1022 Digital Lock-in Amplifier
User Manual
Saluki Technology Inc.

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  • Page 1 SE1022 Digital Lock-in Amplifier User Manual Saluki Technology Inc.
  • Page 2 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com The document applies to following models: SE1022 DSP Lock-in Amplifier (1 mHz to 102 kHz)  Standard Pack: 1 × Main Machine  1 × Power Cord  1 × USB Cable ...
  • Page 3 Saluki. Saluki Tech owns the copyright of this document which should not be modified or tampered by any organization or individual or reproduced or transmitted for the purpose of making profit without its prior permission, otherwise Saluki will reserve the right to investigate and affix legal liability of infringement.

  • Page 4: Table Of Contents

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Content 1 Lock-in Amplifier Basics............................6 Introduction..............................6 Functional Diagram............................8 Reference Channel............................8 Phase Sensitive Detectors..........................9 Time Constants and DC Gain........................10 DC Outputs and Scaling..........................12 Dynamic Reserve............................14 Signal Input Amplifier and Filters....................... 15 Input Connections............................
  • Page 5 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Command Syntax............................57 Detailed Command List..........................57 5 Computer Operation.............................. 69 Install Software............................69 How to Use the Software..........................71 Usage Examples............................88 6 Performance Tests..............................97 Self-Test............................... 98 DC Offset..............................98 Common Mode Rejection..........................

  • Page 6: Lock-In Amplifier Basics

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 1 Lock-in Amplifier Basics 1.1 Introduction The Lock-in amplifier is a device used to detect very small signals, which are always obscured by noise sources many thousands of times lager. The lock-in amplifier can extract these small signals from noises and measure their values accurately.
  • Page 7 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com         sin(  sin(   sin(          cos(   cos(    sin(  In the time region, the output of the PSD consists three parts: The first part is a DC signal.

  • Page 8: Functional Diagram

    The phase difference is defined as: 1.2 Functional Diagram The functional block diagram of the SE1022 DSP Lock-In Amplifier is shown in Fig.4. On the whole, the SE1022 includes signal conditioners, reference signal generators, an algorithm module and a system control module and so on.

  • Page 9: Phase Sensitive Detectors

    PSD, the output is not a single frequency, but a distribution of frequencies about the true reference frequency. In fact, phase noise in the SE1022 is very low and generally has no effect. In applications that requiring no phase jitter, the internal reference mode should be chose.

  • Page 10: Time Constants And Dc Gain

    To the digital PSD's, the dynamic reserve is limited by the quality of the A/D conversion. Once the input signal is digitized, no further errors are introduced. Practically, the dynamic reserve of SE1022 can exceed 120dB. The performance of a lock-in amplifier is largely determined by the performance of its PSD's. Almost in all respects, the digital PSD outperforms the analog one.
  • Page 11 Nevertheless, the synchronous filter only filters out the harmonic component of the reference frequency, and the followed filters filter the noise. The SE1022 provides time constants as long as 3000s when the reference frequency is below 200 Hz, which can satisfy most requirements of measurements.

  • Page 12: Dc Outputs And Scaling

    CH1 and CH2 on the front panel, including the value of X, Y, R, θ of the test signal. The display interface of SE1022 is shown in Fig.6. SE1022 can display the value of CH1 and CH2 through bars in addition to numbers. To discover the changes of data, you can observe the data in the time region.
  • Page 13 X, Y and R Output Offset and Expand The SE1022 has the ability to offset the X, Y and R outputs, which is useful when measuring deviations in the signal around some nominal value. The output can be offset to zero by setting the offset. Then changes in the output can be read directly from the display or output voltages.

  • Page 14: Dynamic Reserve

    When the signal is amplified by PSD, the output signal will contain noises. If the noise is very high, it will result in large output noise. Otherwise, if the external noise is very low, the output is mainly affected by the noise of SE1022.

  • Page 15: Signal Input Amplifier And Filters

    Input noise works in the same way. For sensitivities below 5μV, the value of input noise determines the output noise. ENBW depends on the time constant and filter roll off. For example, suppose the SE1022 is set to <5 μV> full scale, <100 ms>...

  • Page 16: Input Connections

    102 kHz to 154 kHz and achieves an attenuation of at least 100dB above 154 kHz. Input Impedance The input impedance of SE1022 is 10 MΩ. If a higher input impedance is desired, the SE1022 remote preamplifier must be used so that the SE1022 has the maximum input impedance of 100 MΩ.

  • Page 17: Intrinsic Noise Sources

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com In the first method, the lock-in uses the A input in a single-ended mode. The lock-in detects the signal as the voltage between the center and outer conductors of the A input only. However, there are two disadvantages of this mode. Generally, the low level is a constant of 0V.
  • Page 18 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com  At 300°K, a resistor of 10 kΩ is connected to the input of the amplifier. The voltmeter is connected to the output of the amplifier. The open-circuit effective voltage of the filter which has a 10 kHz bandwidth is 1.3 μV. The amplitude of Johnson noise is unpredictable in normal cases.

  • Page 19: External Noise Sources

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Total Noise Johnson noise and shot noise are unreducible. Any resistors with a same resistance have the same Johnson noise. Shot noise relies on the special manufacture of resistors, including its material and package technology and so on. For example, among winding resistor, metal film, carbon resistor and pure carbon, the winding resistor has the minimum resistance.
  • Page 20 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Cures for inductively coupled noise include: 1) Remove or turn off the interfering noise source. 2) Reduce the area of the pick-up loop by using twisted pairs or coaxial cables. 3) Use magnetic shielding to prevent magnetic field from crossing the area of measurement. Resistive Coupling or Ground Loops The ground loop is an interference source which can generate noise voltage between the grounds.

  • Page 21: Aux In/Out

    Aux In/Out There are four 16-bit high-precision AUX-ADC input channels in SE1022. The input voltage ranges from - 10 V to + 10 V and the minimum resolution is 0.3 mV. These 4 ADC channels can clamp the input signal and amplify the internal differential signal.

  • Page 22: Multi-Harmonic Detection

    SE1022 develops and integrates the function of FFT high accuracy spectrum analysis, which can realize the frequency domain analysis from 1 kHz to 102 kHz and display the spectrum distribution of the signal in real time. The setting of FFT is in the menu of [DISPLAY].

  • Page 23: Interfaces

    Fig.9 Front Panel of SE1022 Display The SE1022 uses a 5.6-inch TFT-LCD for display and interactive control. Display resolution is 640*480. 8 levels of background brightness are available, which is set in the [SYSTEM] sub-menu. The measurement results are displayed at the left of the screen.

  • Page 24: Rear Panel

    2.2 Rear Panel The rear panel of SE1022 is shown in Fig.10. It includes a cooling fan, a power connector, a power switch, an USB interface and extended functional interfaces. The extended functional interfaces include AUX IN, AUX OUT, TRIG IN, TTL OUT, and MONITOR.

  • Page 25: Main Display

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 2.3 Main Display The main display is divided into 4 parts, including status bars, data bar, monitoring bar and function bar. (1) Status Bars As is shown in Fig.11 and Fig.12, the status bars indicate the current settings of the system or the results of measurement. Users can switch what to display in the submenu [DISPLAY].
  • Page 26 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.12 Main Interface: Status Bar 2 (2) Data Bar Fig.13 Main Interface: Data Bar Users can choose which to display among <X>, <Y>, <R>, <θ> in [DISPLAY] submenu, as shown in Fig.13. How to display is also optional, such as number chart, bar chart, XY coordinate graph and pole coordinate graph.
  • Page 27 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com If there are both an input overload and amplification overload, it shows <Overload: INPUT GAIN>. In this case, reduce the input as soon as possible to prevent over-voltage damage to the instrument. <Freq>...

  • Page 28: Menus

    The MENUs consists of ten parts: [INPUT/FILTERS], [REF/PHASE], [GAIN/TC], [DISPLAY], [SAVE/LOAD], [CHANNEL OUTPUT], [SAMPLE], [AUX OUTPUT], [SYSTEM] and [AUTO SET], see the front panel of SE1022 in Fig 9. Each button has an independent corresponding submenu. 3.1 [INPUT/FILTERS] When press the [INPUT/FILTERS] button, you will enter this following submenu, as is shown in Fig.16. There are 5 function settings in this submenu, including <Source>, <Current Gain>, <Grounding>, <Coupling>...

  • Page 29: Ref/Phase]

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Generally, choose <Ground> when the current of the input signal is not large. It prevent signal drift caused by floating. Choose <Float> when there is a large potential difference between the signal ground and chassis ground and a strong current injection.
  • Page 30 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.18 [REF/PHASE] Submenu-<Internal> Fig.19 [REF/PHASE] Submenu-<Internal Sweep> 3.2.1 < Ref. phase >: Setting the Reference Phase Users can set the phase shift between two orthogonal reference signals through the keyboard. The accuracy of phase is 0.01°and the range is from -180°...
  • Page 31 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com <Internal Sweep> The internal reference signal sweep. In this mode, the signal generator will conduct internal sweep according to the parameters set by users. As is shown in Fig.19, <Sweep> can be set. 3.2.3 <...
  • Page 32 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.20 <Sweep> Secondary Submenu <Sweep Type> Setting frequency sweep type. <Linear> linear sweep type <Log> logarithm sweep type In the <Linear> mode, the step type is frequency by adding the frequency with the setting step frequency. In the <Log>...
  • Page 33 When start from <Single> sweep, SE1022 does an internal frequency sweep according to the settings of users. After that, the status jumps back to <Stop> automatically. When start from <Loop > sweep, SE1022 does constant loop sweep until users switch the status to <Stop> manually.
  • Page 34 3.2.7 < Sine Output>: Setting the Sine Output SE1022 can output sine wave whose amplitude range is from 0V to 5V through the “Sine Out” BNC connector on front panel. In its secondary submenu, users can set <Sweep Type>, <Voltage>, <Sweep Set> and <Sweep Run>.
  • Page 35 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.23 <Sine Output> Secondary Submenu-<Linear & Log> <Sweep Type> Setting amplitude sweep type. <Fixed> fixed amplitude sweep type(default) <Linear> linear amplitude sweep type <Log> logarithm amplitude sweep type In <Fixed> mode, the amplitude of <Sine Output> is set by users. In <Linear> or <Log> mode, settings are configured in <Sweep Set>...

  • Page 36: Gain/Tc]

    When start from <Single> sweep, SE1022 does an internal amplitude sweep according to the settings of users. After that, the status jumps back to <Stop> automatically. When start from <Loop > sweep, SE1022 does constant loop sweep until users switch the status to <Stop> manually.
  • Page 37 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com The charge of <Sensitivity> will change the dynamic range of the system. Besides, it will impact the output of CH1&CH2. If the measure signal is current, the full scale acts as the corresponding current unit, <100mV/nA> in default.

  • Page 38: Display]

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 3.4 [DISPLAY] Press [DISPLAY] button and enter the submenu as is shown in Fig.25. In this submenu, there are 4 function settings: <Monitor> <Display & Scale> <Equation> and <Disp More>. They can be chosen and set by the soft keys beside the submenu.
  • Page 39 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.27 <Full>-<Chart> Display Fig.28 <Full>-<FFT> Display Fig.29 <Full>-<List> Display...
  • Page 40 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com <Display & Scale> is used to set the display area and type of measurement results, including two submenus: <Area> and <Type/Trace>. <Area>: Setting Display Area <Full> Full display mode displays in the whole dynamic area. It has 4 display types, including <Polar>, <Chart>, <FFT>...
  • Page 41 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.31 <Top>-<Chart> Display <Top> Only choose the top area to set. When <Type> or <Trace> is changed, the display way of top area will change, as is shown in Fig.30 and Fig.31. There are two choices in <Type>, including <Bar>...
  • Page 42 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com <Rh1> The R value of 1th channel harmonic of the input signal. <θh1> The θ value of 1th channel harmonic of the input signal. <Xh2> The X value of 2th channel harmonic of the input signal. <Yh2>...
  • Page 43 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com <Equation> Setting equation parameters. The value of A, B and C in equation 1 ~ 4=A*B/C can be changed through soft keys. The optional values of A, B and C include fundamental wave, harmonic wave, ADC, frequency and constant parameters.

  • Page 44: Save/Recall]

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Before using <Curve Point>, users should callout <Cursor> by pressing the [CURSOR] button in CONTROL area. [SAVE/RECALL] Press [SAVE/RECALL] button and enter the submenu as is shown in Fig.34. Fig.34 [SAVE/RECALL] Submenu [SAVE/RECALL] menu is mainly used to save and recall the setting parameters and status.
  • Page 45 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.35 [CHANNEL OUTPUT] Submenu The two BNCs CH1 and CH2 can output R, X, Y and θ that users wanted by setting in the [CHANNEL OUTPUT] submenu. The output offset and expand is set in <Offset & Expand>. In <Speed>, users can set the output rate of channel. The calculation equation of output signal is: 1.
  • Page 46 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 125 Hz – 200 Hz 250 Hz – 500 Hz 500 Hz – 1000 Hz 1 kHz – 2 kHz 4 kHz – 8 kHz 8 kHz – 16 kHz … Equation is calculated by the above formulas users choose, and then calculate the final result according to the Equation formula itself.

  • Page 47: Sample]

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.36 <Offset & Expand> Submenu <Offset> setting: It is set through keyboard. The adjustable range is -100% to +100%. The minimal step is 0.01% and 0.00% is default. <Expand> setting: It is set through keyboard. The adjustable range is 1 - 256 and 1 is default. If the setting value of Expand causes the calculation result over ±10V, the output will be seriously affected.
  • Page 48 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.37 [SAMPLE] Submenu 3.7.1 < Step Time >: Setting the Step Time Setting the step time, range: 1ms~ 100,000ms, collect one data at every step time. 3.7.2 < Length >: Setting the Sample Length Setting the sample data length, range: 1 to 16384 When the data sampling is being executed, if the <Length>...

  • Page 49: Aux Output]

    Setting the 4 sampling buffers <Buffer1~4> There are 4 internal <Buffer> in SE1022. Each buffer can store 16384 32-bits-data. Each buffer can store any one of the following parameter, including <R>, <X>, <Y>, <θ>, <R>, <X>, <Y>, <θ>, <R>, <X>, <Y>, <θ>, <Noise>, <E1>, <E2>, <E3>, <E4>, <A1>, <A2>, <A3>, <A4>...

  • Page 50: System]

    The forth channel output of AUX DAC, corresponding to AUX_DAC4 on rear panel. [SYSTEM] [SYSTEM] submenu includes the system information and settings of SE1022, like instrument information, screen brightness and the settings of RS232 communications, as is shown in Fig.40.
  • Page 51 Choose <Info> to enter a secondary submenu shown in Fig.41. This submenu displays related information about the R&D unit of the instrument. Fig.41 <INFO>-Submenu Choose <Version> and the interface displays the version of SE1022, as is shown in Fig.42. Fig.42 <INFO>-Version Choose <Contact> and the interface displays contact information as is shown in Fig.43.
  • Page 52 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.43 <INFO> -Contact Information 3.9.2 < Screen > Submenu Fig.44 <Screen> Submenu-<Style 1> Fig.45 <Screen> Submenu-<Style 2>...
  • Page 53 Setting the parity. <Even> Even <ODD> <NONE> nothing Note that using <USB> and <RS232>, the local SE1022 can communicate with another SE1022 or the PC. More details are talked at ‘CHAPTER 4 REMOTE PROGRAMMING’. 3.9.4 < Reset? >: The Lock-in Reset...

  • Page 54: Auto Set]

    R. The principle is that the system should choose an appropriate <Sensitivity> but no more than the maximum sensitivity. The < Auto Gain > function in SE1022 needs some response time (generally less than 5s). If the current R fluctuates a lot, the setting for <...

  • Page 55: Control]

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Press the <Auto Scale> button and the system will adjust the scale according to R to make the displayed value large enough within the range. This < Auto Scale > function only has effect on display. The input and output will not be affected.
  • Page 56 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Spin the knob to move <Cursor>. If the <Cursor> exceeds the edge of <Chart>, the <Chart> will change to the next page. Also, <Cursor> can be positioned directly through <Curve Point> in <Disp More> menu. [CURSOR] makes sense when the data sampling is executing or pausing.

  • Page 57: Remote Programming

    The SE1022 has a 256-character input buffer and processes commands in the order received. If the buffer fills up, the new commands will cover the oldest and processed commands.
  • Page 58 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Note that all numeric variables can be expressed in integer, floating point or exponential formats (i.e., the number five can be 5, 5.0, or .5E1). Strings are sent as a sequence of ASCII characters. 4.2.1 Reference and Phase Commands PHAS(?){x} The PHAS command sets or queries the reference phase shift.
  • Page 59 1(i=1) or harmonic 2 (i=2) and is required. The parameter j is an integer from 1 to 32767. The HARM i,j command will set the SE1022 to detect at the jth harmonic of reference frequency. The value of j is limited by j*f≤102kHz. If the value of j requires a detection frequency larger than 102kHz, then j will be set to the maximum value that meets this condition.
  • Page 60 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com below. Parameter j, k, l θ θh1 θh2 Noise Freq For example, send command “ EQCD 2,0,18,17” and then the Equation 2 will be set as: E2=R*C1/Freq. The EQCD? i command queries the configuration parameters of Equation i. Values are returned as the serial number corresponding to A, B, C with the values separated by commas.
  • Page 61 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com and the expand is 10 V/A (i=3). IGND(?){i} The IGND command sets or queries the input shield grounding. The parameter i selects Float (i=0) when the input ground is connected to the instrument ground with a 10 kΩ resistor or Ground (i=1) when the input ground is connected to the instrument ground with a 10 Ω...
  • Page 62 200 Hz. 4.2.5 Displayed and Output Commands FPOP(?)i{,j} The FPOP i command sets and queries the output channel on the front panel of SE1022. The parameter i must be set when sending this command. The parameter i selects CH1 (i=1) or CH2 (i=2) as the output channel.
  • Page 63 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 13 E1 13 E1 14 E2 14 E2 15 E3 15 E3 16 E4 16 E4 OEXP(?)i{,x,j} The OEXP i command sets or queries the output offsets and expands. The parameter i must be set when sending this command.
  • Page 64 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 4.2.6 Save and Read Settings Commands SSET i The SSET i command saves the current setup in setting buffer i (1≤i≤4). The parameter i selects S1 (i=1), S2 (i=2), S3 (i=3) or S4 (i=4). The setting buffers are retained when the power is off.
  • Page 65 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Parameter θ θh1 θh2 Noise Freq STRG(?){i} The STRG? command sets or queries the trigger way of data sampling. The parameter i selects inner trigger mode <INT> (i=0) or outer trigger mode <EXT> (i=1). SPRM(?){i} The SPRM? command sets or queries the mode of data sampling.
  • Page 66 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Parameter θ θh1 θh2 Noise Freq Values are returned as ASCII floating point numbers with units of Volts, degrees or Hz. This command is a query only command. SNAP?i,j,{k,l,m The SNAP? command records the values of no more than 13 parameters at a single instant. ,n,o,p,q,r,s,t,u} For example, SNAP? is a way to query values of <X>, <Y>, <R>, <θ>...
  • Page 67 16384 which is the maximum number of data stored in the buffer. 4.2.10 Reset and IDN Commands The RST command is used to reset SE1022 to its default configurations. All internal status and parameters are set to their default conditions and values. Data stored in the buffers will...
  • Page 68 IDN? The IDN? query returns the SE1022’s device identification string. This string is in the format “SSL LIA-SE1022, SNXXXXXX, VerXXX”. In this example, the model name is SE1022; the serial number is SN0001; the firmware version is Ver 1.00.

  • Page 69: Computer Operation

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 5 Computer Operation 5.1 Install Software The required software is provided with the CD disk as below in Fig.48. Fig.48 Software files 1. Install the UART to USB Driver Double-click “FT232_drive.exe” in Fig 49 in the fourth file “Uart Driver” in Fig.48. Fig.49 “Uart Driver”...
  • Page 70 Now, use a USB cable to connect the PC and SE1022. If the driver is OK, they will be linked automatically. Note that if the PC is online, the PC will search the proper driver online when you connect the PC and SE1022. And the installation will run automatically.

  • Page 71: How To Use The Software

    Windows 7/XP. 2) Double click the file “SE1022_Console_EN.exe” in Fig.53 red box. If the installation is right, and then you will see the Fig.54. 3) Now you can configure the SE1022 parameters in PC. Fig.53 “SE1022_Console_EN” File Fig.54 SE1022 Software Interface 5.2 How to Use the Software...
  • Page 72 You can click the button to switch between these two statuses. Note that before the program runs, the Baud rate of the SE1022 should set to 921600bd. Fig.55 (left) Program is running (right) Program stops 2. Connection This part shows you how to connect the PC and the SE1022.
  • Page 73 Choose the right COM number. If the COM is right, the connection will success after few seconds. Note that when the PC is connected to SE1022 with USB, you can go to “Device Manager” to search “COM and LPT”. In this case, you can know which COM is used to connect currently.
  • Page 74 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.60 Software Connection Succeeds 3. Input Configuration The program configuration area of input signal is as shown in the red box in Fig.61. The details of the configuration are listed on Table 3. Fig.61 The Configuration Area of Input Signal Table 3.
  • Page 75 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Current Impedance 1MOhm Current Gain (when the input signal is small, the gain is 10 V/A ) 100MOhm Current Gain (when the input signal is small, the gain is 10 V/A) Input Shield Float (the input connector ground and the instrument ground are isolated Grounding by a 10kΩ...
  • Page 76 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.62 The Configuration Area of Reference Signal Table 4. Reference Signal Configuration PHASE Setting the phase shift of two orthogonal reference signals for PSD algorithm. The range is -180° to +180° and the resolution is 0.01°...
  • Page 77 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.63 The Configuration Area of Internal Frequency Sweep Table 5. Internal Sweep frequency Reference Configuration Int. Sweep Type Linear Int. Sweep Start Setting the start frequency of sweep manually. The frequency range is (Hz) from 1mHz to 102kHz and the minimum resolution is 1mHz.
  • Page 78 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com The configuration area of Dynamic Reserve and Sensitivity is in the red box in Fig.64. The details of configuration are listed on the Table 6. Fig.64 The Configuration Area of Dynamic Reserve and Sensitivity Table 6.
  • Page 79 The button will switch to be processing after click the button . This means the SE1022 is executing the auto function. After finishing this process, this button will reset to the start status . And then the “dynamic reserve” and “sensitivity” will refresh to the value that SE1022 returns.
  • Page 80 The configurations of 3. “ Sync Filter ” is relatively independent. Click the corresponding not the  button to close or open the auto function. The button will switch to when click the button .This means the SE1022 is executing the auto function. If you need to close the sync...
  • Page 81 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com filter, click this button again and it will reset to the start status . This means you have closed the sync filter successfully. 8. Output Configuration The output configuration is in the red box in the Fig.67. The details of configuration are shown in Table 9. Fig.67 The Configuration Area of Output Channel Table 9.
  • Page 82 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com After changing the settings, you need to click to finish this configuration. Otherwise, the settings  are void. 9. Aux Output Configuration The aux output configuration is in the red box in the Fig.68. The details of configuration are shown in Table 10. Fig.68 The Configuration Area of Aux Output Channel Table 10.
  • Page 83 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.69 The Configuration Area of Equation Table 11. Equation Configuration Options Equation The output of Equation can be E1/E2/E3/E4. The input can be the X/Y/R/ θ of signal or signal harmonic, the ADC1/ADC2/ADC3/ADC4 of AUX_ADC input, noise, frequency and C1/C2.
  • Page 84 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.70 The Configuration Area of Sine Output Table 12. Sine Output Configuration Options Sine Out Mode Fixed Linear Sine Out Voltage (Vrms) The Sine Out Mode is Fixed manually. The peak-peak voltage is 1mVrms to 5Vrms, the minimum resolution is 1mVrms.
  • Page 85 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com After changing the settings, you need to click to finish this configuration. Otherwise, the  settings are void. 12. Data Buffer Configuration The data buffer configuration is shown in the red box in Fig.71. The details of configuration are shown in Table 13. Fig.71 The Configuration Area of Data Buffer Table 13.
  • Page 86 13. Data Storage The software has the function of data storage. Users can choose to save the data or not that SE1022 collects in a period. The saved data contains the X/Y/R/θ of measure signal or signal harmonic, frequency, noise and the ADC1/ADC2/...
  • Page 87 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.72 The Configuration Area of Data Storage The steps for choosing to save data or not: 1. The data is saved in Excel. The file name is “Data_recorded_excel.xls”. It is saved in the program directory. 2.

  • Page 88: Usage Examples

    This example will show how to use SE1022 PC software to configure parameters, and observe and record the value of R/X/Y/θ. First, connect the SE1022 and PC according to the software usage guidance in 5.2 and then you can start to configure.
  • Page 89 . When this button is clicked and it displays |being progressing|. The SE1022 will execute the auto phase function. After finishing this function, this button will . Now the option “Phase” will update to the phase shift angle value that returned reset to the original status by SE1022.
  • Page 90 If you don’t use sync filter, do not click the corresponding button |Close| and just keep it. If you use sync filter, is clicked and it displays “ Open ” , the SE1022 has click the corresponding button . When this button started the sync filter function.
  • Page 91 Use “ ” to set sensitivity. Click the button in Auto Sensitivity option. Then this button displays “ Processing … ” This means the SE1022 is executing auto sensitivity function. And after finishing this . Now the “ ” and “...
  • Page 92 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.78 Auto Sensitivity Configuration Compare the two SE1022 interfaces before and after configuration as is shown in Fig.79 and Fig.80, and you will see the configurations are successful. Fig.79 <SENS> is 100 mV before configuration...
  • Page 93 Fig.80 <SENS> is 50 mV before configuration 5. These configurations of SE1022 are finished. Other options are in default. Then uses can collect and save data. Data is saved in the selected directory in the form of an Excel. The file name is “Data_recorded_excel.xls” and it has 18 columns of data.
  • Page 94 1. Choose these options in the 1.configuration area of data buffer, including data type, step time and length with other options in default. Then click the button and then click the button . When there is a progress bar at the bottom of this button, the SE1022 starts to collect data, as is shown in Fig.84.
  • Page 95 As is shown in Fig.86, after clicking the button , there will be a progress bar at the bottom of this button. When the progress bar runs to 100%, the SE1022 has saved the collected data in buffers. Now four excel files will be generated in current directory.
  • Page 96 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.86 The collected Data is saving...

  • Page 97: Performance Tests

    6 Performance Tests Introduction The performance tests are designed for users to prove that the SE1022 can operate normally and enhance users’ confidence to our instrument. Each test can be recorded on the Performance Test Record form at the final section of this chapter.

  • Page 98: Self-Test

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Accuracy ≤ 0.005 % Recommended KEITHLEY 2100 3.DC Voltage Source Voltage Range ≥ 10 V Accuracy < 10mVpp Recommended RIGOL DP831A 4.Feedthrough Terminations Impedance 50 Ω Front Panel Display First, turn on the power switch on the rear panel to start the device. Second, Test check whether the display is lighted or not.

  • Page 99: Common Mode Rejection

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com <Ref. Source> Set to <Internal> <Ref. Frequency> Set to 1Hz <Sensitivity> Set to <1mV> through the spinning knob 3. Wait 10 seconds, then record the value of R. 4. Change the setting: <Coupling>...

  • Page 100: Amplitude Accuracy And Flatness

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 6.4 Amplitude Accuracy and Flatness This test measures the amplitude accuracy and frequency response. Device Use the function signal generator to provide an accurate frequency and a sine wave. Use one cable with BNC connector to connect the output of the function signal generator to the A input of the lock-in.

  • Page 101: Amplitude Linearity

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 96 kHz 120 kHz a) Set <Sensitivity> of the lock-in to <200 mV>. b) Set the frequency of the function signal generator to 1 kHz and the amplitude to 200.00mVrms. c) Set the frequency of the function signal generator in the upper sequence. d) Wait 10 seconds, then record <R>, then test the next frequency.

  • Page 102: Frequency Accuracy

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com a) Set the output amplitude of the function signal generator. b) Wait 10 seconds, then record <R>, then test next amplitude. c) Repeat from 3)-a) to 3)-b) until all amplitudes are tested over. 4.

  • Page 103: Dc Outputs And Inputs

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com b) Set <Sensitivity>. c) Wait 10 seconds, then record <R>, then test next group of Sensitivity-Sine Output. 4. Repeat from 3)-a) to 3)-c) until all the Sensitivity-Sine Output are tested over. Frequency response is checked at frequencies above 1 kHz.

  • Page 104: Input Noise

    Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com -50.00 -100.00 c) Waiting for 10 seconds and record the reading of the DVM. Then, test next group data. d) Repeat steps 3-b) to 4-c) until finishing the tests for CH1. Then, connect the DVM to CH2 and continue to finish the tests for CH2.

  • Page 105: Performance Test Record

    3. Wait until the reading is steady, and then record the maximum value of noise. 4. End the test and fill the result in the performance test form. 6.10 SE1022 Performance Test Record SE1022 Performance Test Record Serial Number Tested By...
  • Page 106 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 4. Amplitude Accuracy and Flatness Sensitivity Amplitude Lower Limit Reading Upper 1.0000Vrms 0.9800V 1.0200V 200mV 200.00Vrms 198.99mV 202.00mV 100mV 100.00Vrms 98.00mV 102.00mV 20mV 20.000Vrms 19.60mV 20.400mV 10mV 10.000Vrms 9.800mV 10.200mV Sensitivity Amplitude Lower Limit Reading Upper...
  • Page 107 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 96 kHz 0.6859V 0.7283V 8. DC Outputs and Inputs Output Offset Lower Limit Reading Upper Limit 100.00 9.960V 10.040V 50.00 4.960V 5.040V 0.00 -0.020V 0.020V -50.00 -5.040V -4.960V -100.00 -10.040V -9.960V Output Offset Lower Limit Reading...
  • Page 108 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Output Voltage Lower Limit Reading Upper Limit AUX OUT 4 10.00 9.700V 10.300V 5.00 4.900V 5.100V 0.00 -0.020V 0.020V -5.00 -5.100V -4.900V -10.00 -10.300V -9.700V Input Voltage Lower Limit Reading Upper Limit AUX IN 1 10.00 9.960V...

  • Page 109: Operation Examples

    7.1 Simple Signal Measurements This example will show how the SE1022 measure the value of R, X, Y, θ. You need two BNC cables to input the measurement signal and the reference signal. In this case, we use the function signal generator to generate a 80mVrms, 1kHz sine signal and use the SE1022 to measure it.
  • Page 110 When the input of the preamplifier is overload, you should decrease the output amplitude of the function signal generator. If the output gain is overload, you should increase the sensitivity of the SE1022 (the input of the preamplifier will be overload when the peak value is larger than 1.7V or the valley value is lower than -1.7V). The default sensitivity is <100mV>.
  • Page 111 Press [Soft Key 1] to choose <Sensitivity> and then it will be highlighted. Spin the knob to change the value of sensitivity so that there is no overload and the full scale is the maximum. In this case, we set the parameters as Fig.91. Then SE1022 measures the sine signal and the result is R=80.08 mV, θ=-72.78°. Soft Key 1...
  • Page 112 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Soft Key 1 Soft Key 2 Soft Key 3 Soft Key 4 Soft Key 5 Fig.93 [DISPLAY] Menu Interface Users can change which value to display as the following steps. For example, how to display <θ> instead of <R>in top area with XY Coordinates Chart. First, press [soft key 2] and choose <Top>.

  • Page 113: Harmonics Measurements

    Use a BNC cable to connect the output of the function signal generator and the A/I input of the SE1022. Use another BNC cable to connect the reference signal of the function signal generator and the REF IN of the SE1022, as is shown in Fig.96.
  • Page 114 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.97 Measured Signal Parameter 4. Press [REF PHASE] in front panel and set <Harmonic> to the required order, as is shown in Fig.98. Fig.98 [REF PHASE] Submenu...
  • Page 115 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Soft Key 1 Soft Key 2 Soft Key 3 Soft Key 4 Soft Key 5 Fig.99 REF PHASE Submenu Set the harmonic number in <Harmonic> secondary submenu and use the keyboard to input the required order. The operation steps of measuring the first and third harmonic of the input square wave is below.
  • Page 116 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.101 The 3 Harmonic Measurement Result How to get the amplitude of the n harmonics How to calculate the harmonic theoretical value of the square wave: suppose that the peak-peak value of square value is E and the angular frequency is ω.

  • Page 117: Optical Spectral Measurements

    Use a BNC cable to connect the Sync out f1 of the optical chopper and the REF IN of the SE1022. Use a BNC cable to connect the data collection platform and the CH1 OUT of the SE1022. The sketch is shown in Fig.102.
  • Page 118 Fig.102 Spectral Measurement Platform Diagram Fig.103 Spectral Measurement Platform Physical Connection 4. Start the spectral measurement and collect data from the data collection platform. Then, you will get an uncalibrated spectral curve as is shown in Fig.104. Fig.104 Spectrum Curve measured by SE1022...

  • Page 119: Serial Communication

    Note that this software can set the communication mode, the receiver mode, the transfer mode. The default Baud rate of the SE1022 is 921600. The SE1022 has no parity bit, 8 data bits and 1 stop bit. The port number choose the COM number automatically assigned by the PC.
  • Page 120 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Fig.106 “CommUart Assistant” Software Display After these settings are completed, if you see a black circle like , you need to click the button to make it red like . If you cannot make it red, please check the port number and repeat the connection. If the connection id OK, you will see Fig.108.
  • Page 121 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com The port number is COM5 Fig.107 Check the port number at “Device Manager” Select COM5 port number Select the default baud rate 921600 Open and close buttons Fig.108 USB connection succeeds...
  • Page 122 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com 4. Transfer commands to communicate with the SE1022. (1) The commands consist of four upper mnemonics, option parameters and a terminator. Several commands at the same line are separated by semicolons. More details please see Chapter 4 Remote Programming. The terminator can be a carriage return <cr>...
  • Page 123 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Hex display, return the parameters with 0X0D. Hex display can see the return parameter after the 0X0D. Selecting this item will cause the ASC II in the send area to be converted to a hex format display. After the instruction to be added 0X0D.
  • Page 124 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Can return parameters normally. Select the fixed byte, set the value to 0D. No additional carriage return 0xD is required. Fig.111 Setting the checksum (3) Multiple commands are separated by “,”, such as “SENS 24;FMOD 1;FREQ 1000;SENS ?;FMOD ?; FREQ ?”, as is shown in Fig.112.
  • Page 125 Fig.113 and Fig.114. Note that when use this software to control the SE1022, the LCD display will refresh at the same time. For example, if <Sens: 100mV> is corresponding to the “25” command. <Sens> will change to <Sens: 50mV> when the SE1022 receives the “24”...
  • Page 126 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Continuously receives the returned R value data Set the data cyclic to send The transmission interval is set to 200ms Send an instruction to read the R value Fig.113 Read the single R value continuously...
  • Page 127 Tel: 886. 909 602 109 Email: sales@salukitec.com www.salukitec.com Continuously return the value of X,Y,R,θ Send multiple values read instruction, Separated the parameters by comma. Fig.114 Read the Values of X, Y, R, θ and Freq continuously --END OF DOCUMENT--...

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