Application Notes
52
5.1.9 Average Power Over an Interval
13. The average power of the signal over a time interval is computed by:
a)
b)
summing the sample powers in the interval
dividing the sum by the number of samples
This process calculates Pulse Power, Average Power, and the average power between markers.
Since each sample represents the power in a finite time interval, the endpoints are handled separately to avoid
spreading the interval by one-half pixel at each end of the interval (see figure
??
). For the interval in figure
??
, the
average power is given by:
𝑃
𝑎𝑣𝑔
=
1
2
(𝑃
0
+ 𝑃
𝑛
) +
1
𝑛 − 1
𝑛−1
∑
𝑛=1
𝑃
𝑛
Figure 5.7
Sampling Interval
14. The processor calculates the delay between the two measurement channels. The time reference for each channel is
established by the first signal crossing (starting from the left edge of the screen) which passes through the mesial
level. The signal excursion must be at least 6 dB.
Summary of Contents for RFM3000 Series
Page 1: ......