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R-50C-021-3 数据表(PDF) 10 Page - Keysight Technologies

部件名 R-50C-021-3
功能描述  P-Series Power Meters and
Download  14 Pages
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制造商  KEYSIGHT [Keysight Technologies]
网页  http://www.keysight.com
标志 KEYSIGHT - Keysight Technologies

R-50C-021-3 数据表(HTML) 10 Page - Keysight Technologies

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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 =


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