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M9391A Datasheet(PDF) 17 Page - Keysight Technologies |
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M9391A Datasheet(HTML) 17 Page - Keysight Technologies |
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17 / 30 page  17 | Keysight | M9391A PXIe Vector Signal Analyzer - Data Sheet Technical Specifications and Characteristics Measurement speed46 IQ data capture 47 Nominal Large block (50 MSamples) 1.5 s Transferred in 100 kSa or 1 MSa blocks Small block (100 captures, 100 ksamples each) 292 ms Transferred in 10 kSa blocks Adjust level, freq (10 ksamples) 1.7 ms Transferred in 10 kSa blocks Power measurements 48 Channel power settings & filter bandwidth Acquisition Time Averages Nominal 3.84 MHz 400 µs None 1.8 ms 10 7.6 ms 100 µs None 1.3 ms 10 4.1 ms 50 µs None 1.3 ms 10 3.4 ms 30 kHz 100 µs None 3.9 ms 10 30.4 ms 46. EVM, ACPR and servo loop test times for the RF power amplifier test, reference solution are included in the solution brochure 5991-4104EN. 47. Capture block, transfer to host memory, 160 MHz BW, excludes frequency transitions below 400 MHz, with M9037A embedded controller (2-link configuration: 1 x 8 [factory default]). 48. Transfer to host memory, 160 MHz IF bandwidth filter, excludes frequency transitions below 400 MHz, with M9037A embedded controller (2-link configuration: 1 x 8 [factory default]). Noise Figure Measurement Application Description Specifications Supplemental Information Noise figure Uncertainty calculator49 < 10 MHz See footnote50 10 MHz to 6 GHz Internal and external preamplification recommended51 Noise source ENR Measurement range Instrument uncertainty52 4 to 6.5 dB 0 to 20 dB ± 0.054 dB 12 to 17 dB 0 to 30 dB ± 0.102 dB 20 to 22 dB 0 to 35 dB ± 0.119 dB 49. The figures given in the table are for the uncertainty added by the X-Series Signal Analyzer instrument only. To compute the total uncertainty for your noise figure measurement, you need to take into account other factors including: DUT NF, Gain and Match, Instrument NF, Gain Uncertainty and Match; Noise source ENR uncertainty and Match. The computations can be performed with the uncertainty calculator included with the Noise Figure Measurement Personality. Go to Mode Setup then select Uncertainty Calculator. Similar calculators are also available on the Keysight web site; go to http://www. keysight.com/find/nfu. 50. Uncertainty performance of the instrument is nominally the same in this frequency range as in the higher frequency range. However, performance is not warranted in this range. There is a paucity of available noise sources in this range, and the analyzer has poorer noise figure, leading to higher uncertainties as computed by the uncertainty calculator. 51. The NF uncertainty calculator can be used to compute the uncertainty. For most DUTs of normal gain, the uncertainty will be quite high without preamplification. 52. “Instrument Uncertainty” is defined for noise figure analysis as uncertainty due to relative amplitude uncertainties encountered in the analyzer when making the measurements required for a noise figure computation. The relative amplitude uncertainty depends on, but is not identical to, the relative display scale fidelity, also known as incremental log fidelity. The uncertainty of the analyzer is multiplied within the computation by an amount that depends on the Y factor to give the total uncertainty of the noise figure or gain measurement. See Keysight App Note 57-2, literature number 5952-3706E for details on the use of this specification. Jitter (amplitude variations) will also affect the accuracy of results. The standard deviation of the measured result decreases by a factor of the square root of the Resolution Bandwidth used and by the square root of the number of averages. This application uses the 4 MHz Resolution Bandwidth as default because this is the widest bandwidth with uncompromised accuracy. |
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