3 Specifications and Characteristics
58 U2000 Series Operating and Service Guide
Example:
U2000A power sensor, measured power = –4 dBm, gate length = 1.36 ms,
number of averages = 256.
The measured power is –4 dBm, thus the corresponding noise per sample
is 85 µW (refer to the noise per sample table).
Use Equation 2 for measurement noise calculation:
The calculated measurement noise (1.123 µW) is lower than the
measurement noise specification (21 µW). In this case, the measurement
noise would be 21 µW.
85µW
1
256
-------------
×
4
1.36 ms()0.68µs()⁄
-------------------------------------------------
4
× 1.123µW=
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