Table 2-13 Noise Multipliers - Keysight Technologies E9320 Series Operating And Service Manual

Effect of averaging on noise:
for reducing noise.
sensor. Use the noise multipliers in
or x2), or measurement mode (normal and average-only), and the number of
averages to determine the total measurement noise value.
In addition, for x2 speed (in normal mode) the total measurement noise should be
multiplied by 1.2 and for fast speed (in normal mode) the multiplier is 3.4. Note
that in fast speed no additional averaging is implemented.
Table 2-13
Example: E9321A power sensor, number of averages = 4, free run acquisition,
normal mode, x2 speed.
Measurement noise calculation:
<6 nW 0.88
(
Keysight E9320 Operating and Service Guide
Table 2-12
Noise multipliers
Number of averages
1
2
4
8
16
32
64
128
256
512
1024
1.2 <6.34 nW
× × )
=
Specifications and Characteristics
Averaging over 1 to 1024 readings is available
provides the measurement noise for a particular
Table 2-13
Noise mul tiplier
Average-onl y
Normal speed
5.5
3.89
2.75
1.94
1.0
0.85
0.61
0.49
0.34
0.24
0.17
for the appropriate speed (normal
Normal
Normal speed, free run
x2 speed
6.5
4.6
3.25
2.3
1.63
1.0
0.72
0.57
0.41
0.29
0.2
2
acquisition
1.0
0.94
0.88
0.82
0.76
0.70
0.64
0.58
0.52
0.46
0.40
37