SPM PLL
Contents
1. 4 t2 EM UL c 4 EXE 159000 1 4 D EE SIDES eR UU n 5 DNE SEL picnic 6 2 THEORY OFOPERALDIONczsxtukE nsus EErEIENVAFEEEINVEFAEEENERENEEE RESERVE SEEUSE PEAK T 3 SOFTWARE AND HARDWARE INSTALLATION 8 4 PLL USEH INTEHFAG B uscdixpIuEE RAEONEES REESESESEDENER REPE NEA USE URS FEED RUNS FERE DURS ES EAE EN 9 4 1 Phase Detector Time Cte S oeiniscn genu nkRENE D dun ER Ea IRE REUS E KEu FU GR EXEC cR UM UB E VCEFUNEQA MEE RK CES DR CEN REGE 9 42 Resonator SWOGD uscueeccuiiunitt eue esinintuuniMsRUCeosensiux a S AAE MM EMURUKMNSETUN EE KAP RCRS 9 43 ObBerauon Serup CONN Soca cheers eect cee 11 44 Exctalon Paramielers eii tuneco ioo oett ono iie i casus e aiaa E Pepe eese e epos 11 45 ol od eee Dm DIENEN ee 12 46 PilCon trols and ESI M 12 4 7 Loop Response Test Controls ccccccssscseeeeeeeseccesssseeeeeeeeeoeessseeeeeeeeooeessseeeeeeeeeoessnneeeees 13 4 8 Phase Output Amplitude and Excitation Frequency Indicators 14 4 9 Time Signal Graph and Signal Selection cc cceseeeeee eere eeeeeeeee 15 SIME Wil TEIL GB 17 4 11 Save and Recall Configuration Files e eceeeeeeee2. IA TE 047 309 8311 FAX 047 309 8310 etes di SE SEES http www scilab co jp E mail sales scilab co jp SPM PLL User s Manual 12 Soft Ez Select the desired bandwidth and click ok Then the interface will automatically set the LP filter for the phase frequency the PI gains and the time constant of the phase amplitude detector to reach the desired bandwidth For the amplitude controller the following dialog box allows specifying the desired bandwidth Desired Bandwidth 5 Hz Between 1 5 Hz and 10Hz 15 00 dB Gain at Resonance dB 20000 0 Q Factor Cancel To be able to determine the proper PI gains the auto adjustment function must know the gain at the resonance and the Q factor of the resonator These values can be measured with the Resonator Sweep function The interface will automatically set the LP filter for the amplitude signals the PI gains and the time constant of the phase amplitude detector to reach the desired bandwidth 4 7 Loop Response Test Controls Response Tests Amp Step 0 05 V Phase Step Theses controls allow the testing of the loop response of both controllers These controls can be used only if the corresponding controller is engaged The test function measures the step response of the controller An adjustable step is applied on the set point and the resonator phase or output amplitude is recorded during the test The Amp step and Phase step are used to define the amplitud
3. Mux Frequency Mux Phase Mux Amplitude Mux Excitation Output 2 Output 3 Outputs4 Outputss LP Filter Phase Frequency LP Filter amp mp 93 Hz 5 8 Hz PLL interface Operation Set up Controls These controls allow the set up of the reference values and the configuration of the analog output signals Up to four analog signals can be generated by the PLL For each signal the reference the range and the output number can be adjusted A low pass filter is applied on the output signals and the frequency cut off can be adjusted from a menu There are two LP filters one for the phase and excitation frequency signals and another one for the resonator and excitation amplitude signals For each output signal the reference can be automatically set to the current value with the button Set reference The minimum and maximum values in unit are presented for each output The minimum and the maximum depend on the selected range and the reference value The sensitivity of the output is also displayed and can be modified by adjusting the range 4 4 Excitation Parameters Output Excitation Amp 0 00000 V max 10V Excitation Freq 32766 1794 Hz Output 1 of the PLL generates a high purity sine wave The frequency and the amplitude can be adjusted with these controls If the phase controller is engaged the frequency is not adjustable and the Excitation Freq Hz control becomes an indicator If the amplitude controller is
4. Freq Range Phase Range Amp Range Excitation Range Output 10 000000m 487Hz v 7 16deg v 425v x 410V Excitation Amp Min Freq abs Min Phase rel Min Amp abs Min Exci abs 4 73478 max 10V 20 000000m i i i i i i i i i 32579 6690 Hz 7 162 Deg 0 000 V 0 000 V MATES 0 00 20 0m 40 0m 60 0m 80 0m corrum 140m 160m 180m 200m 220m Max Freq abs Max Phase rel Max Amp abs Max Excl abs 2766 1760 H T Tue T X HEA m 32952 6884 Hz 7 162 Deg 2 250 V 10 000 V 156 302 6 Olu oke d A a Sensitivity Freq Sensitivity Phase Sensitivity RA Sensitivity EA PI Parameters Amp Signal Select 2 Resonator Amplitude filtered 53 62m V Hz 1 396 V Deg 8 000 V V 1 000 V V P Amp m 100 000000u Mux Frequency Mux Phase Mux Amplitude Mux Excitation amp J Output 2 Outputs3 Output 4 v Output 5 i IAmp z 50 000000u Ed i P LP Filter Phase Frequency LP Filter Amp 77 5 dB Cas D 2 0 000000 93 Hz 5 8 Hz x Lock In amp mp E 50000000u Excitation Freq Resonator Phase Resonator Amp Excitation Amp PI Parameters Phase 100 000000u i i i i 1 i i i i Set reference Set reference Set reference Set reference 0 00 20 0m 40 0m 60 0m 80 0m 100m 120m 140m 160m 180m 200m 220m P Phase S Time s n 61 6 dB addi EE Phase Detector Time Cst s Noise dB 2 125 893 Noise V rms 3 58784u 7 IPhase fre Fast J Slow 55 rum 127 2 dB Ww Set Points Noisy Clean Reso
5. Soft ib www softdb com SPM PLL User s Manual Version 1 7 Open Source SPM CONTROLLER amp PLL i PULSE COUNTER STATUS M PLLis Model MK3 PLL OK by Soft Kel In association with G y G Convergence Instruments November 2011 Main Sign al History Response Tests Signal Signal Select 1 Excitation Freq filtered Operation Set up Amp Step 20 000000m 0 05 V Excitation Freq Resonator Phase Resonator Amp Excitation Amp Phase Step a 10 000000m Freq Reference Phase Reference Amp Reference Excitation Ref 2 Deg 3 32766 17868 Hz 119 02310 Deg 1 00000 V 4 59340 V Freq Range Phase Range Amp Range Excitation Range Output 10 000000m 187Hz w 7 16 deg 25V 10v v Excitation Amp Min Freq abs Min Phase rel Min Amp abs Min Exci abs 4 73181 max 10V 20 000000m i i i i 32579 6690 Hz 7 162 Deg 0 000 V 0 000 V EXCIatiOn Fred 0 00 20 0m 40 0m 60 0m 80 0m 100m 120m 140m 160m 180m 200m 220m Max Freq abs Max Phase rel Max Amp abs Max Exci abs q Time s 2766 1778 H HA sel 32952 6884 Hz 7 162 Deg 2 250 V 10 000 V ise d 158 7 Noise H 613 128 oise Hz nns A Sensitivity Freq Sensitivity Phas
6. engaged the excitation amplitude is not adjustable and the Excitation Amp V control becomes an indicator Be EE TAPORATOMIES 7270 0021 FRR NGM 7 10 25 RUSH LY ADRIRY Z TEL 047 309 8311 FAX 047 309 8310 weit eds as SER http www scilab co jp E mail sales scilab co ip Soft Ez 4 5 Set Points Set Points Resonator Amplitude 1 V Relative Resonator Phase 0 Deg These controls adjust the set points for the phase and the resonator amplitude Note that the phase set point is always the reference phase So the set point adjustment for the phase is done through the phase reference control see the Operation Set up controls This way the phase controller always works centered around zero 4 6 PI Controls and Switches PI Parameters Amp P Amp 8 1 dB uh I Amp P 77 5 dB tJ Lock In amp mp PI Parameters Phase P Phase bl 6 dB 1 J I Phase A m 427 2 dB Lock In Phase The sign and the gain of the Proportional and Integral factors can be adjusted with these controls for both controllers The OFF ON buttons engage or deactivate each controller The Auto buttons can be used to determine the PI gains and LP filter set up for both controllers For the phase controller the following dialog box allows specifying the desired bandwidth Desired Bandwidth 50 0 Hz Between 1 5 Hz and 4500Hz Cancel ox SCIENCE LABORATORIES mE 7270 0021 TERR 7 10 25 HRXUEREUYILAZAR2RU
7. the long term stability of the PLL and to estimate the noise On SCIENCE LABORATORIES cy tgp 7 10 25 RISA Ff LYADRIRY Z TEL 047 309 8311 FAX 047 309 8310 ett es d sn SE http www scilab co jp E mail sales scilab co jp SPM PLL User s Manual 17 Soft Ez T3 soft dB PLL Version 1 7 e mE Main Signal History Excitation Frequency Shift 20 000000m 15 000000m S XE HELDEN EIE n et ee es PSs eee a a ee ee es ee nnd n S m e NAN AS Ne AS posad M a a ee ee NES ENTE Benoa METTE 15 000000m Amplitude Hz 20 000000m Th 1 1 i 1 I 1 1 1 I 1 1 1 0 5 10 15 20 25 30 35 40 45 50 55 60 65 Time s Resonator Amplitude Shift BH 29 50 000000u 40 000000u 20 000000u 0 000000 20 000000u Amplitude Volts 40 000000u 50 000000u 0 Time s Clear History History Length 60 00 s Amplitude controller test interface Resonator Amplitude Tab 4 11 Save and Recall Configuration Files These buttons save and recall a configuration All PLL parameters are saved in the configuration file When a configuration is recalled both controllers are automatically stopped SCIENCE ARON ES 7270 0021 FERHAT IER 7 10 25 RUSH f LY AZADRIRY Z TEL 047 309 8311 FAX 047 309 8310 E TS GS ete dci http www scilab co jp E mail sales scilab co jp SPM PLL User s Manual 18
8. 32763 00 3276400 32765 00 32766 00 32767 00 32768 00 32769 00 32770 00 Frequency Hz 12 500 15 000 Amplitude dB 37 500 7 l l l l l l l l l l 32760 00 32761 00 3276200 32763 00 32764 00 32765 00 32766 00 32767 00 32768 00 32769 00 32770 00 Frequency Hz Start Freq Hz Resolution Hz mee 32760 0 Hz 0 0500 Hz Resonance Freq 32766 2000 Hz START STOP Stop Freq H3 Phase at Resonance 119 02 Deg Measurement Pause 32770 00 Hz 300 ms Gain at Resonance 13 44 dB Excitation Amp Q Factor 38548 5 half max QUIT 8 00000 V Q Factor 4189 1 derivative Resonator Sweep Interface The resonator sweep interface automatically sets the time constant of the phase detector at 1ms to obtain a precise measurement of both the phase and amplitude The original time constant for the phase detector is replaced after the sweep measurement Before starting the measurement the start and stop frequencies must be adjusted along with the frequency resolution and the excitation amplitude The Measurement Pause control specifies the waiting period between a change in excitation frequency and the corresponding measurement When the resonator Q factor is large the stabilization time after the excitation change can be long For instance for a Q factor of 25k and a resolution of 0 05Hz a stabilization time of 300ms is necessary At the end of the measurement the resonance frequency the gain at the resonance the phase at the resonance fr
9. 6 Soft Ez 2 Theory of Operation The diagram of PLL running on the Signal Ranger Mk3 DSP board is illustrated in the following figure j Resonator i Synthesizer l Excitation Freq Output 1 i Input 1 Output 2 Output 3 Output 4 Output 5 Phase set point Corrector PI Amplitude set point PLL schematic The synthesizer sends a sine wave on output 1 Input 1 measures the output of the resonator The phase detector measures the amplitude and the phase of the resonator output signal with respect to its excitation The phase detector algorithm measures the phase of the resonator alone automatically correcting for the phase of board s digital and analog chains So no special calibration is necessary before using the PLL When working with a second order resonator specifying a phase of 90 degrees will lock the PLL at precisely the resonance frequency The amplitude and phase control loops keep the resonator phase and output amplitude at specific set points The PLL can generate up to four analog signals on outputs 2 3 4 and 5 The possible selections for these signals are The resonator phase The resonator amplitude The excitation amplitude The excitation frequency For each signal the gain or the range can be specified to obtain the desired output sensitivity Also an adjustable low pass filter is added to increase the resolution of the output signals if n
10. a smaller step excitation can be used to insure a linear behaviour 4 8 Phase Output Amplitude and Excitation Frequency Indicators Resonator Phase 111 861 Deg Resonator Amplitude 15 5265n V Excitation Frequency 32766 179307 Hz These indicators present SCIENCE LABORATORIES 720 0021 TERES 7 10 25 HAS Y TLLA2WA2hRU X TEL 047 309 8311 FAX 047 309 8310 Ritts AE http www scilab co jp E mail salesQscilab co jp Soft Ez The resonator phase The resonator amplitude The excitation frequency A first order low pass filter is applied The filter that can be adjusted with the LP filter applied on Freq Phase Amp control see Operation Set up controls 4 9 Time Signal Graph and Signal Selection Signal Select 1 Excitation Freq filtered I 10 000000m Amplitude Hz cC e c e c e l 10 000000m 20 000000m 7 l l l l l l 0 00 20 0m 40 0m 60 0m 80 0m 100m 120m 140m 160m 180m 200m 220m Time s LES For Noise dB 1 158 252 Noise Hz rms 646 529u SignalSelect 2 Resonator Amplitude filtered 100 000000u gt 50 000000 u P a 0 000000 X 50 000000u 100 000000u 7 l l l l l l l l l l l 0 00 200m 40 0m 60 0m 0 0m 100m 120m 140m 160m 180m 200m 220m Time 5 uH i HEJ nj Noise dB 2 124 768 Noise V rms 4 06421 u These graphs present various signals of interest in real time The selection of the signals is done through the Signal Sele
11. and no low pass filter is applied Excitation Amp raw Excitation amplitude in V This signal is constant at the specified value if the amplitude controller is OFF If the amplitude controller is engaged this signal is the output of the amplitude corrector This is the raw signal and no low pass filter is applied Excitation Freq filtered Filtered excitation frequency in Hz This signal is constant at the specified value if the phase controller is OFF If the phase controller is engaged this signal is the filtered output of the loop controller The display low pass filter is applied to lower the noise For this signal the Signal control can be used to present the absolute value or the shift value The reference value in the Operation Set up tab is used to compute the shift value Resonator Phase filtered Filtered resonator phase in degrees as measured by the phase detector The phase detector algorithm measures the phase of the resonator alone automatically correcting for the SEE ABORTION E 7270 0021 FRAP NGM 7 10 25 HASH T ILAA2RU I TEL 047 309 8311 FAX 047 309 8310 Zt 6 HAE http www scilab co jp E mail salesQscilab co jp Soft Ez phase of board s digital and analog chains For this signal the Signal control can be used to present the absolute value or the shift value The reference value in the Operation Set up tab is used to compute the shift value Resonator Amplitude filtered Filtered resonat
12. ct menu The following table presents the possible choices Q SCIENCE sic ES 7210 0021 FERMF Tem 7 10 25 RUSH LY AZDRIRY Z TEL 047 309 8311 FAX 047 309 8310 Ae s Hie E http www scilab co jp E mail sales scilab co jp SPM PLL User s Manual 15 Soft Ez Resonator Qutput Excitation Resonator Phase raw Excitation Freq raw Resonator Amp raw Excitation Amp raw Excitation Freq filtered Resonator Phase filtered Resonator Amplitude filtered Excitation Amplitude filtered Output 2 Excitation Freq Output 3 Resonator Phase Output 4 Resonator Amp Output 5 Excitation Amp Siga A4 Description signal measured by the DSP board on input 1 DUMP generated bythe DSP board on ouput 1 generated by the DSP board on output 1 Resonator Phase raw Resonator phase in degrees aS measured by the phase detector The phase detector algorithm measures the phase of the resonator alone automatically correcting for the phase of board s digital and analog chains This is the raw signal and no low pass filter is applied Excitation Freq raw This value in Hz is fixed if the phase controller is OFF If the phase controller is engaged this signal is the output of the phase corrector This is the raw signal and no low pass filter is used Resonator Output Amp raw Resonator output signal amplitude as measured by the phase detector in V This is the raw signal
13. e Sensitivity RA Sensitivity EA PI Parameters Amp Signal Select 2 Resonator Amplitude filtered v 53 62m V Hz 1 396 V Deg 8 000 V V 1 000 V V P Amp 0m 100 000000u Mux Frequency Mux Phase Mux Amplitude Mux Excitation FR Output 2 v Output 3 v Outputes v Outputs IAmp as S 50 000000u 77 5 dB E v LP Filter Phase Frequency LPFilter Amp EF 0 000000 93Hz X 5 8 Hz X Lock In Amp 2 Lon 50 000000u Excitation Freq Resonator Phase Resonator Amp Excitation Amp PI Parameters Phase 100 000000u i 1 i 1 1 i 1 i 1 i 1 Set reference Set reference Set reference Set reference 0 00 20 0m 40 0m 60 0m 80 0m 100m 120m 140m 160m 180m 200m 220m P Phase E Time s 61 6 dB G HE 9 Phase Detector Time Cst s Noise dB 2 125 302 Noise V rms 3 84044u IPhase p Fast J Slow 55 LS E Noisy Clean aes 127 2 dB e Set Points Resonator Phase 119 023 Deg 150us 100us 1 50m s Lock In Phase Resonator Amplitude 1 V Resonator Amplitude 1 00001 V Lon Relative Resonator Phase 0 Deg Excitation Frequency 32766 177751 Hz mm md ween Wil Open bal mE SCIENCE LABORATORI ES RUSH LYADRIRU Z RBC b Mike T 270 0021 FHRBRA HIEM 7 10 25 TEL 047 309 8311 FAX 047 309 8310 http www scilab co jp E mail sales scilab co jp Soft Ez TL SOPEGIFICATIONO oii ko rest estrERt an EVIAEFESEEzV EE FS FEE SEMERNVEXS NEN TRE VER CURRERE EE ERE ERR ER 4 MEE POWER SUD 20
14. e ecce cce eeeeee enn nne nennen 18 o SCIENCE hice ES 7210 0021 TERRENI 7 10 25 RUSH LY ADRIRY Z TE 047 309 8311 FAX 047 309 8310 Ate dan SE http www scilab co jp E mail salesQscilab co jp SPM PLL User s Manual 3 Soft Ez 1 Specifications The GXSM software for the SPM controller model Mk3 includes a PLL module However the SPM controller model Mk3 can be used as a stand alone PLL when using the PC software described in this document The next figures present the front and the back of the SPM controller model Mk3 Open Source SPM CONTROLLER amp PLL PULSE COUNTER 5 VDC GPIO 0 7 GPIO 8 15 eig S dari CHASSIS e 5 2E 0 QEP 1 6 y GROUND MADE IN CANADA FABRIQU AU CANADA 5MF 1 5 R 1 1 Power Supply The PLL works with an external 5V 5 power pack 1 2 USB The PLL is controlled by a Windows PC through a USB connection The high speed USB 2 0 PC link provides a throughput in excess of 35 Mb s in the read and write directions 1 3 Analog Inputs Number of Inputs 1 Resolution 16 bits Raw Noise Figure 300 uV RMS Sampling Rate 150 kHz Analog Input Bandwidth 0 to 10 MHz includes DC Input Type Single Ended Input Leakage 1 yA max Anti Aliasing Filter None Dynamic Range 10V Group Delay 2 samples Seen ECKE 7270 0021 FRR he 7 10 25 HASH LLATAARU A TEL 047 309 8311 FAX 047 309 8310 Actes dam SE http www scilab co jp E mail salesQsc
15. e of the step For instance if the Phase step control is set to 3 the controller set point will be stepped up by 3 deg for the test The set point step is returned to zero after the test The Test button launches the following interface phase controller case Q SCIENCE jigs ES 7270 0021 FERHAT IER 7 10 25 RUSH f LY AZDRIRY Z TEL 047 309 8311 FAX 047 309 8310 ett edd SSE SE http www scilab co jp E mail sales scilab co jp SPM PLL User s Manual 13 Soft Ez 13 SR3 PLL TestPIResponseVerl 3 vi Resonator Phase Response Excitation Frequency Res Step Response Resonator Phase Phase Deg 750 000m 500 000m Time s Amplitude dB 0 05 0 1 l 1 Frequency Hz Bandwidth 45 7502 Hz Phase controller test interface Resonator Phase Tab In the first tab Resonator Phase Tab the top curve presents the step response and the bottom curve is the closed loop frequency response of the derivative of the step response i e the spectrum of the closed loop impulse response This curve allows the evaluation of the controller bandwidth The second tab presents the excitation frequency response This is the output of the phase controller If saturations appear on this curve it means that the output of the controller reaches the maximum or the minimum of the operation range If required the operation range can be increased to avoid this non linear behaviour or
16. ecessary An offset reference can be added so the analog output signal is centered on a user selectable value The PLL is controlled and adjusted using a graphical user interface running on a Windows PC Oz SCIENCE LABORATORI ES ae 7270 0021 FRA Te 7 10 25 RASA T LYADRDRY A TEL 047 309 8311 FAX 047 309 8310 Actes GSE SE http www scilab co jp E mail salesQscilab co jp Soft Ez 3 Software and Hardware Installation Note The software must be installed before connecting the PLL unit to a PC The software installs the USB driver automatically Windows XP Windows Vista and Windows 7 are supported on a 32 bit or 64 bit PC To install the software launch the SofidB SPM PLL 1 7 exe Eu cU ENSE CABORD TORIES 1270 0021 FR RBA Nek 7 10 25 RUSH ff LY ADRIRY Z TEL 047 309 8311 FAX 047 309 8310 AU ed SEE http www scilab co jp E mail salesQscilab co jp SPM PLL User s Manual Soft Ez 4 PLL User interface T3 soft dB PLL Version 1 7 o m mex Main Signal History Response Tesis Signal shit Signal Select 1 Excitation Freq filtered gt Operation Set up Amp Step 20 000000m i 0 05 V Excitation Freq Resonator Phase Resonator Amp Excitation Amp Phase Step E 10 000000m Freq Reference Phase Reference Amp Reference Excitation Ref m 2 Deg E n 32766 17868 Hz 119 02310 Deg 1 00000 V 4 59340 V n 3
17. equency and the Q factor are computed and presented by the interface Two methods are used to compute the Q factor 1 phase derivative at the maximum gain and 2 half maximum method Use the Quit button to quit the measurement interface The interface will ask for an update of the frequency reference and the phase reference If the user clicks yes the phase and the frequency references will be updated with the new phase at the resonance and the new resonance frequency Note The Q factor and the gain at the resonance are important information for the auto adjustment function of the amplitude controller eCTenee EAB ne TOnrre 7270 0021 FRR 7 10 25 ANS TLYADHRARY A TEL 047 309 8311 FAX 047 309 8310 weit ess aS SER http www scilab co jp E mail sales scilab co ip Soft Ez 4 3 Operation Set up Controls PN Operation Set up Excitation Freq Resonator Phase Resonator Amp Excitation Amp Freq Reference Phase Reference Amp Reference Excitation Ref 32766 17863 Hz 119 02310 Deg 1 00000 V 4 59340 V Freq Range Phase Range Amp Range Excitation Range 487Hz 7 16 deg e 435V l 40V v Min Freq fabs Min Phase rel Min Amp abs Min Exci fabs 32579 6690 Hz 7 162 Deg 0 000 V 0 000 V Max Freq abs Max Phase rel Max Amp abs Max Exci abs 32952 6884 Hz 7162 Deg 2 250 V 10 000 V Sensitivity Freg Sensitivity Phase Sensitivity RA Sensitivity EA 53 62m V Hz 1 396 V Deg 8 000 V V 1 000 V V
18. h 1kHz Bandwidth 5Hz Amplitude Controller Amplitude Controller Bana Zake Banach 13H Phase Amplitude PAC 100Hz to 10kHz The bandwidth is automatically adjusted when the loop auto set Detector Bandwidth function is used Software Features 1 Resonator frequency sweep for automatic measurement of resonator frequency characteristics 2 Loop gain auto set for amplitude and phase controllers Gains are set according to desired closed loop bandwidth 3 In circuit closed loop step response measurement function validates the setup of both controllers 4 Adjustable low pass filter on PLL signals Excitation amplitude frequency and Resonator phase amplitude These filters can be adjusted from 1 5 Hz to 16 kHz or bypassed 5 Real time monitoring of all PLL signals 6 Long term monitoring of PLL signals to assess the low frequency stability and noise Temperature Coefficient TCXO Stability 140 ppb over a temperature range from 20 C to 70 C TCXO Precision 2 ppm Note Noise levels are measured using the resonator board included with the SPM controller gain 13 dB at the resonance and the auto set of loop gains for both controllers The new PLL technique ensures that the noise levels are independent of measurement ranges Q SCIENCE PARERA TUNI ES 7270 0021 TRIP I 7 10 25 RASA fF LY ADR RY Z TEL 047 309 8311 FAX 047 309 8310 etes d n SE http www scilab co jp E mail sales scilab co jp SPM PLL User s Manual
19. ilab co jp SPM PLL User s Manual 4 Soft Ez 1 4 Analog Outputs Number of Outputs Resolution Noise e 20MHz bandwidth e 20kHz bandwidth Offset Drift with Temperature Gain Drift with Temperature Offset Drift with Time Sampling Rate Analog Output Bandwidth Output Type Dynamic Range Source Sink ability Anti Aliasing Filter Group Delay e Output 1 and 2 e Output 3 and 4 e Output 5 SCIENCE LABORATORIES 5 16 bits Up to 55 mV pk pk on FFFFr 00004 alternating code sequence 25 uV RMS 2 ppm FSR degC 2 ppm FSR degC 13 pom FSR 500 hours 150 kHz 0 to 80 kHz includes DC Single Ended 10 V 4mA None 2 5 samples 2 5 samples 3 samples 1270 0021 FERFIER 7 10 25 RUSH LY ADRIRY Z TEL 047 309 8311 FAX 047 309 8310 Ate dE SE http www scilab co jp E mail salesQscilab co jp SPM PLL User s Manual Soft Ez 1 5 PLL Performance PLL Module Specifications Input Range Output Range 10V external 1 100 and 1 1000 attenuators provided Frequency Range 3 2 kHz to 75 kHz Resonator Test Board An active resonator board is included with the SPM controller for easy testing and setup of the PLL module PLL Output Signal Ranges Excitation Frequency 2 85 MHz to 23 9 kHz Stand Alone Operation Excitation Amplitude 1 19 pV to 4 10 V Resonator Phase 6 83 uDeg to 57 3 Deg Resonator Amplitude 1 19 uV to 10 V Bandwidt
20. nator Phase 119 023 Deg 15 0us 100u s 1 50m s Lock In Phase Resonator Amplitude 1 V Resonator Amplitude 999 999m V Relative Resonator Phase 0 Deg Excitation Frequency 32766 176016 Hz Resonator Sweep Open Ly Save PLL interface Main Tab 4 1 Phase Detector Time Cst s Phase Detector Time Cst 5 Fast p sow ago Noisy Clean 20 Qu s 15 Qu s 100u s 1 50m s This control adjusts the time constant of the phase detector We suggest keeping time constant to 20us fast set up which allows a bandwidth of about 8 kHz Note that the auto adjustment functions for the PI gains of both controllers amplitude and phase automatically set the time constant to 20us This way the bandwidth of the controller is only limited by the PI gains and the LP filter 4 2 Resonator Sweep The Hesonator Sweep button performs a frequency scan of the resonator A sweep over a limited frequency range is used to measure the frequency response The following figure presents the measurement interface SCIENCE CARORA TORTE 7270 0021 TEEREFTSMER 7 10 25 BXERUXYILDLACAORU IAX TEL 047 309 8311 FAX 047 309 8310 Ate dan SEES http www scilab co jp E mail sales scilab co jp SPM PLL User s Manual 9 Soft Ez F SR3 PLL MeasureResp vi Phase Response 20 00000 40 00000 0 00000 80 00000 100 00000 120 00000 140 00000 160 00000 Phase Deg l 32760 00 32761 00 3276200
21. or output amplitude in V The low pass filter is applied to lower the noise on this signal For this signal the Signal control can be used to present the absolute value or the shift value The reference value in the Operation Set up tab is used to compute the shift value Excitation Amplitude filtered Filtered excitation amplitude in V The low pass filter is applied to lower the noise on this signal For this signal the Signal control can be used to present the absolute value or the shift value The reference value in the Operation Set up controls is used to compute the shift value Output 2 3 4 and 5 These selections represent the 16 bit signal generated by the DSP on outputs 2 3 4 and 5 The output signals are selected with the Mux menu of the Operation Set up controls The user can select between the excitation frequency the resonator phase the resonator amplitude and the excitation amplitude An adjustable reference value is subtracted from these signals to present the shift value The sensitivity of the output signal can be adjusted with a range control Also an adjustable low pass filter is used to lower the noise on all signals 4 10 Signal History The signal history for both the excitation frequency shift and the resonator shift are presented on the Signal History tab The history length is adjustable and the user can clear the history graphs with the Clear History control These graphs are useful to analyze
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