Agilent Technologies U2000 Series Operating And Service Manual page 76

3 Specifications and Characteristics
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.
58
1
⎛
× ------------ - × ------------------------------------------------ -
85µW
4
⎝
(
1.36 ms
256
4
⎞
= 1.123µW
⎠
) ⁄ ( )
0.68µs
U2000 Series Operating and Service Guide