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M9391A Datasheet(PDF) 18 Page - Keysight Technologies |
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M9391A Datasheet(HTML) 18 Page - Keysight Technologies |
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18 / 30 page  18 | Keysight | M9391A PXIe Vector Signal Analyzer - Data Sheet Description Specifications Supplemental Information Gain Instrument uncertainty53 DUT gain range = -20 to +40 dB. See note54 < 10 MHz 10 MHz to 6 GHz ± 0.21 dB 53. “Instrument Uncertainty” is defined for gain measurements as uncertainty due to relative amplitude uncertainties encountered in the analyzer when making the measurements required for the gain computation. 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 since this is the widest bandwidth with uncompromised accuracy. Under difficult conditions (low Y factors), the instrument uncertainty for gain in high band can dominate the NF uncertainty as well as causing errors in the measurement of gain. These effects can be predicted with the uncertainty calculator. 54. 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. Description Specifications Supplemental Information Noise figure uncertainty calculator55 Instrument noise figure uncertainty See the noise figure table earlier in this chapter Instrument gain uncertainty See the gain table earlier in this chapter Instrument noise figure See graphs of “nominal instrument noise figure”; noise figure is DANL + 176.24 dB (nominal)56 Instrument input match See graphs: nominal VSWR 55. The Noise Figure Uncertainty Calculator requires the parameters shown in order to calculate the total uncertainty of a Noise Figure measurement. 56. Nominally, the noise figure of the spectrum analyzer is given by NF = D — (K — L + N + B) where D is the DANL (displayed average noise level) specification, K is kTB (-173.98 dBm in a 1 Hz bandwidth at 290 K) L is 2.51 dB (the effect of log averaging used in DANL verifications) N is 0.24 dB (the ratio of the noise bandwidth of the RBW filter with which DANL is specified to an ideal noise bandwidth) B is ten times the base-10 logarithm of the RBW (in hertz) in which the DANL is specified. B is 0 dB for the 1 Hz RBW. The actual NF will vary from the nominal due to frequency response errors. Nominal instrument NF, 0.01 to 6 GHz, range = -28 dBm 0 7 8 9 10 11 12 13 14 15 16 17 1 23456 GHz |
Similar Part No. - M9391A_17 |
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Similar Description - M9391A_17 |
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