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R-50C-021-3 数据表(PDF) 10 Page - Keysight Technologies |
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R-50C-021-3 数据表(HTML) 10 Page - Keysight Technologies |
10 / 14 page 10 | Keysight N1911A/N1912A P-Series Power Meters and N1921A/N1922A Wideband Power Sensors - Data Sheet Worked Example Uncertainty calculations for a power measurement (settled, average power) [Specification values from this document are in bold italic, values calculated on this page are underlined.] Process 1. Power level: .............................................................. 2. Frequency: ............................................................... 3. Calculate meter uncertainty: Calculate noise contribution – If in Free Run mode, Noise = Measurement noise x free run multiplier – If in Trigger mode, Noise = Noise-per-sample x noise per sample multiplier Convert noise contribution to a relative term 1 = Noise/Power........................ Instrumentation linearity ................................................. Drift .................................................................. RSS of above three terms => Meter uncertainty = .......................... 4. Zero Uncertainty (Mode and frequency dependent) = Zero set/Power = ........................ 5. Sensor calibration uncertainty (Sensor, frequency, power and temperature dependent) = .................... 6. System contribution, coverage factor of 2 => sys rss = ............................ (RSS three terms from steps 3, 4 and 5) 7. Standard uncertainty of mismatch Max SWR (Frequency dependent) = .......................................... convert to reflection coefficient, | ρ Sensor | = (SWR–1)/(SWR+1) = . . . . . . . . . . . . . . . . . . . . Max DUT SWR (Frequency dependent) = ...................................... convert to reflection coefficient, | ρ DUT | = (SWR–1)/(SWR+1) = ..................... 8. Combined measurement uncertainty @ k=1 ............................ Expanded uncertainty, k = 2, = U C • 2 = .......................................... 1. The noise to power ratio is capped for powers > 100 uW, in these cases use: Noise/100 µW. 0.03% ±4.46% 0.115 0.8% 0.03% 0.8% – 0.111 1.25 2.23 1.26 4.0% 4.08% 1GHz 1mW Max( rDUT) • Max(rSensor) sysrss 2 + 2 2 2 UC = |
类似零件编号 - R-50C-021-3 |
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类似说明 - R-50C-021-3 |
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