National Instruments PXIe-5622 Скачать руководство пользователя страница 38

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NI 5622 Calibration Procedure

ni.com

Downconvert the acquired waveform using the MT Downconvert
Passband VI located:

<LabVIEW Directory>\vi.lib\

addons\Modulation\Analog

. Select the Real Input instance of

this VI.

LabVIEW VI

C/C++ Function Call

Call

ModtDownconvertPassband

with the following parameters:

Handle

: The handle you obtained

from

ModtCreateSession

Handle

: Trigger (start) time of the

acquired waveform

: Time interval between data

points in the acquired waveform

inputData

: Acquired waveform

data array

inputDataNumElements

1,000,000

carrierFrequency

: The

Alias

Frequency

value in Table 7 for the

current iteration

passbandBandwidth

1,000,000

initialPhase

reset

TRUE

(for iteration 1),

FALSE

(for iterations 2 through 31)

enableFilter

TRUE

Содержание PXIe-5622

Страница 1: ...ements 4 Password 5 Calibration Interval 5 External Calibration 5 Self Calibration 5 Test Equipment 5 Test Conditions 7 Calibration Procedures 8 Initial Setup 9 Self Calibration 9 MAX 9 NI SCOPE SFP 9...

Страница 2: ...select or click in the software such as menu items and dialog box options Bold text also denotes parameter names italic Italic text denotes variables emphasis a cross reference or an introduction to a...

Страница 3: ...to Table 2 for installed file locations Calibration functions are LabVIEW VIs or C function calls in the NI SCOPE driver The C function calls are valid for any compiler capable of calling a 32 bit DL...

Страница 4: ...ibration functions IVI Lib msc niscope lib NI SCOPE library for Microsoft C containing the entire NI SCOPE API including calibration functions LabVIEW examples instr niScope Directory of LabVIEW NI SC...

Страница 5: ...a complete external calibration at least once every year You can shorten this interval based on the accuracy demands of your application Self Calibration You can perform self calibration whenever nece...

Страница 6: ...dBc Hz 135 dBc Hz 148 dBc Hz Bandpass Amplitude Flatness Absolute Amplitude Accuracy SSB Phase Noise Timing Accuracy Adjustment Frequency Range 900 kHz to 820 MHz Power Measurement Level Setting Rang...

Страница 7: ...20 Frequency Range 900 kHz to 820 MHz Power Measurement Range 4 dBm to 3 dBm Relative Shielding 100 dB Attenuator Mini Circuits VAT 3 SSB Phase Noise Frequency Range 900 kHz to 820 MHz Minimum Power W...

Страница 8: ...ip to avoid ground loops Calibration Procedures The calibration process includes the following steps 1 Initial Setup Install the device and configure it in Measurement Automation Explorer MAX Note All...

Страница 9: ...COPE Soft Front Panel SFP NI SCOPE MAX To initiate self calibration from MAX complete the following steps 1 Disconnect or disable any AC inputs to the digitizer 2 Launch MAX 3 Expand My System Devices...

Страница 10: ...ope Cal Self Calibrate VI Note Because the session is a standard session rather than an external calibration session the new calibration constants are immediately stored in the EEPROM Therefore you ca...

Страница 11: ...ollowing steps to determine the power splitter amplitude imbalance correction factor used to verify and adjust the NI 5622 1 Make the following connections a Connect the signal generator to the source...

Страница 12: ...mends for the output to settle 4 Measure the power in watts of the sine wave using the power meter This value is the Measured Sine Wave Power of Port 1 used in step 7 5 Make the following connection c...

Страница 13: ...Correction where a Measured Sine Wave Power of Port 1 b Measured Sine Wave Power of Port 2 The Splitter Power Correction in dB is used in the Absolute Amplitude Accuracy and Adjustment sections of thi...

Страница 14: ...repair Absolute Amplitude Accuracy Complete the following steps to verify the absolute amplitude accuracy of the NI 5622 1 Make the following connections a Connect the signal generator to the source i...

Страница 15: ...parameters resourceName The device name assigned by MAX idQuery VI_FALSE resetDevice VI_TRUE LabVIEW VI C C Function Call Call niScope_ConfigureChan Characteristics with the following parameters vi Th...

Страница 16: ...parameters vi The instrument handle from niScope_init enforceRealtime NISCOPE_VAL_TRUE numRecords 1 minSampleRate 150 000 000 refPosition 0 0 minNumPts 524 288 LabVIEW VI C C Function Call CallniScope...

Страница 17: ...ncy response of the digitizer call niScope_GetFrequencyResponse b To get the number of coefficients the FIR filter can accept call the NISCOPE_ATTR_EQUALIZATION_NUM_COEFFICIENTS attribute c To configu...

Страница 18: ...xtract Single Tone Information VI This value is the Digitizer Measured Sine Wave Amplitude used in step 15 C C Perform an FFT on the array of data from step 13 LabVIEW VI C C Function Call Call niScop...

Страница 19: ...esult to the Published Specifications for the current iteration listed in Table 4 If the results are within the selected test limit the device has passed this portion of the verification 16 Repeat ste...

Страница 20: ...Range Vpk pk Bandpass Filter Input Voltage Vpk pk Reference Frequency MHz Specifications Limits Max Level dB Min Level dB 1 0 7 NISCOPE _VAL_ FALSE 0 35 53 0 4 0 4 2 1 05 3 1 0 5 0 4 0 4 4 1 5 5 1 4 0...

Страница 21: ...o the source input port of the power splitter using the SMA cable b Connect the power meter to output port 1 of the power splitter c Connect channel 0 IF IN of the digitizer to output port 2 of the po...

Страница 22: ...the following parameters resourceName The device name assigned by MAX idQuery VI_FALSE resetDevice VI_TRUE LabVIEW VI C C Function Call Call niScope_ConfigureChan Characteristics with the following pa...

Страница 23: ...he following parameters vi The instrument handle from niScope_init enforceRealtime NISCOPE_VAL_TRUE numRecords 1 minSampleRate 150 000 000 refPosition 0 0 minNumPts 524 288 LabVIEW VI C C Function Cal...

Страница 24: ...f the digitizer call niScope_GetFrequencyResponse b To get the number of coefficients the FIR filter can accept query the NISCOPE_ATTR_EQUALIZATION_NUM_COEFFICIENTS attribute c To configure the custom...

Страница 25: ...LabVIEW Extract Single Tone Information VI This value is the Digitizer Measured Sine Wave Reference Amplitude used in step 23 C C Perform an FFT on the array of data from step 13 LabVIEW VI C C Funct...

Страница 26: ...all niScope_GetFrequencyResponse b To get the number of coefficients the FIR filter can accept query the NISCOPE_ATTR_EQUALIZATION_NUM_COEFFICIENTS attribute c To configure the custom coefficients for...

Страница 27: ...g the LabVIEW Extract Single Tone Information VI This value is the Digitizer Measured Sine Wave Amplitude used in step 23 C C Perform an FFT on the array of data from step 21 LabVIEW VI C C Function C...

Страница 28: ...Reference Power Compare the result to the Published Specifications for the current iteration listed in Table 5 If the results are within the selected test limit the device has passed this portion of...

Страница 29: ...ion Range Vpk pk Bandpass Filter Reference Frequency MHz Input Frequency MHz Published Specifications Max Level dB Min Level dB 1 1 NISCOPE_ VAL_FALSE 53 34 0 35 0 35 43 62 72 2 1 NISCOPE_ VAL_FALSE 1...

Страница 30: ...ure the input impedance and the maximum input frequency using the niScope Configure Chan Characteristics VI LabVIEW VI C C Function Call Call niScope_init with the following parameters resourceName Th...

Страница 31: ...mends for the output to settle LabVIEW VI C C Function Call Call niScope_ConfigureVertical with the following parameters vi The instrument handle from niScope_init channelList 0 range 1 0 offset 0 0 c...

Страница 32: ...ne wave being generated using the Extract Single Tone Information VI C C Perform an FFT on the array of data from step 10 LabVIEW VI C C Function Call Call niScope_InitiateAcquisition with the followi...

Страница 33: ...6 If the result is within the selected test limit the device has passed this portion of the verification 13 End the session using the niScope Close VI You have finished verifying the timing accuracy...

Страница 34: ...ssion and obtain a session handle using the niScope Initialize VI 3 Configure the input impedance and the maximum input frequency using the niScope Configure Chan Characteristics VI LabVIEW VI C C Fun...

Страница 35: ...ument handle from niScope_init channelList 0 range 1 0 offset 0 0 coupling NISCOPE_VAL_AC probeAttenuation 1 0 enabled NISCOPE_VAL_TRUE LabVIEW VI C C Function Call Call niScope_ConfigureHorizontal Ti...

Страница 36: ...11 Initiate a waveform acquisition using the niScope Initiate Acquisition VI LabVIEW VI C C Function Call Call niScope_SetAttributeViBoolean with the following parameters vi The instrument handle fro...

Страница 37: ...the niScope Fetch poly VI Select the WDT instance of the VI Use the default value for the timestamp Type parameter LabVIEW VI C C Function Call Call niScope_SetAttributeViInt32 with the following par...

Страница 38: ...with the following parameters Handle The handle you obtained from ModtCreateSession Handle t0 Trigger start time of the acquired waveform dt Time interval between data points in the acquired waveform...

Страница 39: ...ionalResample with the following parameters Handle The handle you obtained from ModtCreateSessionHandle t0 Trigger start time of the downconverted I Q signal data dt Time interval between data points...

Страница 40: ...the selected test limit the device has passed this portion of the verification 16 Repeat steps 7 through 15 for each iteration in Table 7 17 End the session using the niScope Close VI You have finishe...

Страница 41: ...Specifications Limits Iteration Bandpass Filter Input Frequency MHz Alias Frequency MHz Specifications Limits Carrier Offset 100 Hz 1 kHz 10 kHz 1 NISCOPE_ VAL_FALSE 53 1 53 1 90 dBc Hz 128 dBc Hz 14...

Страница 42: ...nfigure the input impedance and the maximum input frequency using the niScope Configure Chan Characteristics VI LabVIEW VI C C Function Call Call niScope_init with the following parameters resourceNam...

Страница 43: ...he Range value in Table 8for the current iteration offset 0 0 coupling NISCOPE_VAL_AC probeAttenuation 1 0 enabled NISCOPE_VAL_TRUE LabVIEW VI C C Function Call Call niScope_ConfigureHorizontal Timing...

Страница 44: ...e VI Use the default value for the timestamp Type parameter LabVIEW VI C C Function Call Call niScope_Commit with the following parameter vi The instrument handle from niScope_init LabVIEW VI C C Func...

Страница 45: ...a where df frequency resolution of the spectrum in Hz x average power spectral density data in Vrms 2 Hz Compare the result to the Published Specifications for the current iteration listed in Table 8...

Страница 46: ...ct the signal generator to the source input port of the power splitter b Connect the power meter to output port 1 of the power splitter c Connect channel 0 IF IN of the digitizer to output port 2 of t...

Страница 47: ...ait the amount of time the manufacturer recommends for the output to settle 1 R S NRP Z91 Power Meter 2 Weinschel WA 1507R Splitter 3 To Signal Generator LabVIEW VI C C Function Call Call niScope_CalS...

Страница 48: ...ion in Table 9 9 Configure the signal generator to output a 15 MHz 1 25 Vpk pk sine wave 10 Wait the amount of time the manufacturer recommends for the output of the signal generator to settle 11 Adju...

Страница 49: ...wer Meter Measure Sine Wave Power Use this value to calculate the Measured Sine Wave Amplitude used in step 13d where a Power Meter Measure Sine Wave Power b Splitter Power Correction d Adjust the fre...

Страница 50: ...ul adjustment LabVIEW VI C C Function Call Call niScope_CalAdjustFrequency Response with the following parameters sessionHandle The session handle from niScope_CalStart channelName 0 range 1 stimulusF...

Страница 51: ...complete the following steps 1 Select the device from which you want to retrieve information from My System Devices and Interfaces PXI System 2 Select the Calibration tab in the lower right corner You...

Страница 52: ...hCount niScope Cal Fetch Date VI niScope_CalFetchDate niScope Cal Fetch Misc Info VI niScope_CalFetchMiscInfo niScope Cal Fetch Temperature VI niScope_CalFetchTemperature niScope Cal Store Misc Info V...

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