Table 4. Measurement Uncertainty (dB), >0.05 GHz to 2 GHz
Initial Power
Measured (dBm)
Final Power Measured (dBm)
0 °C to 50 °C
20 °C to 30 °C
+4 to +20 -16 to <+4 -60 to <-16 +4 to +20 -16 to <+4 -60 to <-16
-60 to <-16
0.16
0.16
0.03
0.11
0.12
0.03
-16 to <+4
0.17
0.05
0.16
0.09
0.04
0.12
+4 to +20
0.06
0.17
0.16
0.06
0.09
0.11
Table 5. Measurement Uncertainty (dB), >2 GHz to 8 GHz
Initial Power
Measured (dBm)
Final Power Measured (dBm)
0 °C to 50 °C
20 °C to 30 °C
+4 to +20 -16 to <+4 -60 to <-16 +4 to +20 -16 to <+4 -60 to <-16
-60 to <-16
0.16
0.16
0.04
0.12
0.14
0.04
-16 to <+4
0.17
0.05
0.16
0.10
0.04
0.14
+4 to +20
0.06
0.17
0.16
0.07
0.10
0.12
Table 6. Noise, Zero Set, Zero Drift Uncertainty
Power Measured (dBm)
Noise
3
Zero Set
4
Zero Drift
5
-60 to <-16
<123 pW
<332 pW
<344 pW
-16 to <+4
<10.1 nW
<38.7 nW
<42.9 nW
+4 to +20
<0.856 μW
<1.07 μW
<0.996 μW
3
Noise is specified as two-sigma (at three-sigma confidence) after zero operation when measured
with 10.2 seconds of measurement time (measurement time =
Aperture Time
*
Number of
Averages
). Effect of noise can be reduced by increasing the number of averages and/or increasing
the aperture time. Noise decreases at a rate equal to the square root of the number of averages and
aperture time.
4
Zero set is specified as the mean (at three-sigma confidence) after zero operation when measured
with 256 averages and 40 ms aperture time for 1 hour, and when keeping the temperature within
±1 ºC.
5
Zero drift is specified as two-sigma (at three-sigma confidence) after zero operation when
measured with 256 averages and 40 ms aperture time for 1 hour, and when keeping the
temperature within ±1 ºC.
4
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USB-5683 Specifications
