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NI PXIe-5694 Calibration Procedure

Verifying Third-Order Intercept Point Out-of-Band At Multiple
Input Power Levels

Complete the following procedure to verify TOI-OB at multiple input power levels and
downconversion settings.
1.

Ensure that the RF source 1 output and the RF source 2 output are both ON.

Configure the spectrum analyzer as follows:
•

Frequency: 193.6 MHz

•

Span: 0 Hz

•

Reference level: -40 dBm

•

RBW: 10 Hz

•

VBW: 30 Hz

•

Number of averages: 30

Configure the NI 5694 as follows:
•

Reference level: -30 dBm

•

IF output power level: +10 dBm

•

Step gain: Disabled

•

IF conditioning downconversion enabled: Disabled

•

Device instantaneous bandwidth: The first value listed in the

Device Instantaneous

Bandwidth

column in Table 8

Table 8.

TOI-OB Calculation,

DUT Input Power 0 dBm, Downconversion Disabled

Device

Instantaneous

Bandwidth

(Path)

RF Source 1

Frequency

(MHz)

RF Source 2

Frequency

(MHz)

IF OUT Power

(dBm)

TOI-OB (dBm)

20 MHz

223.6

253.6

163.6

133.6

5 MHz

201.1

208.6

186.1

178.6

1.4 MHz

195.7

197.8

191.5

189.4

400 kHz

194.2

194.8

193

192.4

110 kHz

193.765

193.93

193.51

193.27

Содержание PXIe-5694

Страница 1: ...ettings 9 Characterizing RF Source Power 9 Synchronizing the Signal Generators 9 Configuring the Hardware 10 Characterizing the Source Signal Power Levels 11 Characterizing the Source 2 Signal Correct...

Страница 2: ...vironments ADEs When you install NI RFSA you need to install support only for the ADE that you intend to use Documentation You might find the following documents helpful as you perform the calibration...

Страница 3: ...t and drift 0 5 full scale lowest range Reference power uncertainty 0 9 Reference output VSWR 1 04 1 Power sensor quantity 2 Anritsu MA247XD Characterizing RF source power Characterizing cable loss Ve...

Страница 4: ...y 1 5 dB Harmonics typical 0 1 MHz to 10 MHz 30 dBc 10 MHz to 100 MHz 40 dBc 100 MHz to 2 2 GHz 50 dBc 2 2 GHz to 20 GHz 30 dBc Nonharmonic spurious 0 1 MHz to 10 MHz 30 dBc 10 MHz to 2 2 GHz 60 dBc 2...

Страница 5: ...acterizing RF source power Verifying third order intercept point out of band Frequency range 10 MHz to 1 5 GHz Isolation 10 MHz to 100 MHz 15 dB 100 MHz to 750 MHz 20 dB Insertion loss 10 MHz to 100 M...

Страница 6: ...to 18 0 GHz 20 dB 3 5 mm f to 3 5 mm f adapter Huber Suhner 31_PC35 50 0 2 199_N Characterizing cable loss Frequency range DC to 18 GHz Impedance 50 Return loss DC to 1 5 GHz 35 dB 1 5 GHz to 6 0 GHz...

Страница 7: ...atness Frequency range DC to 26 5 GHz Amplitude tracking 0 25 dB Phase tracking 4 Insertion loss 8 5 dB 6 dB nominal Power rating 1 W VSWR DC to 270 MHz 1 25 1 Equivalent output VSWR DC to 270 MHz 1 2...

Страница 8: ...hassis and the calibrator into the same power strip to avoid ground loops Use a torque wrench appropriate for the type of RF connector that you are using NI recommends a 0 565 N m 5 lb in wrench for S...

Страница 9: ...er to power sensor B 3 Zero and calibrate the power sensor using the built in functions in the power meter Characterizing RF Source Power Complete this procedure to characterize the output power of th...

Страница 10: ...enuator P1 3 Connect the remaining 10 dB attenuator to the remaining non common low frequency combiner connector Label both the low frequency combiner connector and the attenuator P2 4 Use an SMA m to...

Страница 11: ...the low frequency combiner common connector measured by the power meter is within 0 1 dB of 0 dBm 4 Record the RF source 1 power level in the empty cell corresponding to the appropriate frequency and...

Страница 12: ...et the output power level of RF source 2 to 20 dBm 3 Set RF source 2 to the first frequency listed in Table 4 4 Record the power level reading on the power meter in the Power Meter Reference cell corr...

Страница 13: ...ndwidth 300 kHz Number of averages 100 9 Set RF source 2 to the same frequency configured for the spectrum analyzer in step 8 10 Record the power level reading on the spectrum analyzer in the Spectrum...

Страница 14: ...Connect power sensor B to the RF source 1 output Figure 3 Power Meter to RF Source 1 Direct Connection 4 Configure RF source 1 as follows Power 0 dBm Frequency The first frequency listed in the Frequ...

Страница 15: ...1 110 7 112 3 113 9 115 5 117 1 117 5 119 1 120 7 122 3 123 9 125 5 127 1 128 7 130 3 131 9 133 5 135 135 1 136 6 138 2 Table 5 Digitizer Cable Loss Continued Frequency MHz Reference Source Measuremen...

Страница 16: ...149 4 151 152 5 152 6 154 1 155 7 157 3 158 9 160 5 162 1 163 7 165 3 166 9 168 5 170 170 1 171 6 173 2 174 8 176 4 Table 5 Digitizer Cable Loss Continued Frequency MHz Reference Source Measurement Di...

Страница 17: ...4 186 187 6 189 2 190 8 192 4 193 6 195 2 196 8 198 4 200 201 6 203 2 204 8 206 4 208 209 6 211 2 212 8 213 5 214 4 215 1 Table 5 Digitizer Cable Loss Continued Frequency MHz Reference Source Measurem...

Страница 18: ...226 3 227 228 6 230 2 231 8 233 4 235 236 6 238 2 239 8 240 5 241 4 242 1 243 7 245 3 246 9 248 5 250 1 251 7 253 3 Table 5 Digitizer Cable Loss Continued Frequency MHz Reference Source Measurement D...

Страница 19: ...asurement cell 6 Repeat steps 4 and 5 for each frequency listed in Table 5 7 Disconnect power sensor B from the RF source 1 output 8 Connect the 3 5mm m to 3 5mm m digitizer cable to the RF source 1 o...

Страница 20: ...ord the Digitizer Cable Loss for the frequency in Table 5 Digitizer Cable Loss Reference Source Measurement Channel B Power where Reference Source Measurement is the corresponding measurement recorded...

Страница 21: ...itter Tracking Error value for the appropriate frequency in Table 5 Splitter Tracking Error Channel B Power Channel A Power 19 Use the following equation to calculate and record the RF Source Cable Sp...

Страница 22: ...tup button and then select External Reference 4 Connect the 10 MHz clock reference output on the spectrum analyzer back panel to the 10 MHz clock reference input on the PXI Express chassis back panel...

Страница 23: ...1 2 SMA m to SMA m Cable 3 10 dB Attenuator 4 Low Frequency Combiner 5 NI 5694 6 SMA m to SMA m Cable 7 RF Source 2 8 Spectrum Analyzer ACCESS ACTIVE IFConditioningModule ESD SENSITIVE REF LO IN 10 M...

Страница 24: ...he RF source 2 generator as follows Power level 20 dBm Frequency 193 6 MHz 3 Configure the spectrum analyzer as follows Center frequency 193 6 MHz Span 0 Hz Reference level 0 dBm Resolution bandwidth...

Страница 25: ...for the configured frequency PREF Characterized reference power recorded in Table 4 for the configured frequency 7 Repeat steps 4 through 6 for each of the remaining values in the Device Instantaneou...

Страница 26: ...s bandwidth 10 Record the power reported by the spectrum analyzer in the appropriate IF OUT Power cell in Table 7 11 Use the formula from step 6 to compute the path gain and record it in the correspon...

Страница 27: ...Hz Number of averages 30 3 Configure the NI 5694 as follows Reference level 30 dBm IF output power level 10 dBm Step gain Disabled IF conditioning downconversion enabled Disabled Device instantaneous...

Страница 28: ...er column in Table 8 IF OUT Power PSA PCORR where PSA Power reported by the spectrum analyzer PCORR Characterized correction dB recorded in Table 4 for the frequency 193 6 MHz 9 Repeat steps 3 through...

Страница 29: ...he spectrum analyzer for a frequency of 21 4 MHz 15 Reconfigure the NI 5694 enabling IF conditioning downconversion and disabling step gain Table 9 TOI OB Calculation DUT Input Power 5 dBm per Tone Do...

Страница 30: ...ep gain Record your results using Table 11 Table 10 TOI OB Calculation DUT Input Power 5 dBm per Tone Downconversion Enabled Device Instantaneous Bandwidth Path RF Source 1 Frequency MHz RF Source 2 F...

Страница 31: ...ification Test Limits Test Condition As Found Limit As Left Limit Downconversion Disabled Gain Off 40 dBm 41 dBm Downconversion Disabled Gain On 32 dBm 33 dBm Downconversion Enabled Gain Off 29 dBm 30...

Страница 32: ...ning power splitter output to the NI 5694 IF IN connector Use an SMA m to SMA m adapter 4 Connect the NI 5694 IF OUT connector to the NI 5622 digitizer IF IN connector Use an SMA m to SMA m cable Figu...

Страница 33: ...lows Signal conditioning Bypassed IF conditioning downconversion Disabled Step gain Disabled 7 Configure RF source 1 as follows Single frequency mode Frequency 107 5 MHz Power level 0 dBm 8 Configure...

Страница 34: ...RF source 1 frequency and the digitizer DDC center frequency by 1 6 MHz 17 Repeat steps 10 through 16 for all frequencies up to and including 267 5 MHz 18 Close the IF attenuation calibration step 19...

Страница 35: ...193 6 MHz Dither enabled FALSE Bandpass filter enabled TRUE 10 Set the NI 5694 IF filter to 20 MHz 11 Read the power meter channel A power 12 Calculate the NI 5694 IF input power using the following e...

Страница 36: ...at steps 10 through 19 with the new settings 23 Reconfigure the NI 5622 digitizer as follows DDC center frequency 21 4 MHz Bandpass filter enabled FALSE 24 Reconfigure the NI 5694 as follows Step gain...

Страница 37: ...94 5 Initialize an IF response calibration step 6 Configure the NI 5694 as follows Signal conditioning Enabled Reference source PXI_Clk IF conditioning downconversion Disabled Step gain Disabled 7 Con...

Страница 38: ...quency offset calculated in step 12 14 Read the power meter channel A power 15 Calculate the NI 5694 IF input power using the following equation Input Power Channel A Power Splitter Tracking at Curren...

Страница 39: ...the NI 5694 EEPROM 21 Repeat steps 13 through 20 for all the values in the frequency list computed in step 12 22 Repeat steps 11 through 21 for IF attenuation table index values from 1 to 25 with a s...

Страница 40: ...he device Note If any test fails reverification after performing an adjustment verify that you have met the Test Conditions before returning your device to NI Refer to Worldwide Support and Services f...

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