|Figure 1: Trend plotting is a handy tool|
for discerning frequency-hopping
|Figure 2: Trend plots reveal complex|
FHSS patterns with ease
|Figure 3: Adding histograms reveals|
more information about an FHSS signal
To delve even further into the characteristics of an FHSS signal, we can augment the trend plot with histograms. The histogram can tell us the dwell time of the frequency peak at its various stops. In Figure 3, we can see that it spends a disproportionate amount of time at one frequency. We can determine what percentage of the time it spends at this frequency versus the other values, or we can determine the value for each of the frequencies either as a percentage or a ratio.
|Figure 4: An example of how trend plots|
and histograms dig deep into the
properties of an FHSS signal
Armed with a sufficiently powerful oscilloscope, one can discover many interesting facets of an FHSS signal.