After implementing the Automatic Bandwidth Measurement, I thought "why not implement the Channel Power Measurement, too?".
Well, here it is:
Very simple to use: if you activate just one of the three Bandwidth Measurements (at -3dB, -6dB or -60dB), the resulting channel power is calculated and displayed.
To make this easier to analyse, the area contemplated for this measurement is painted in purple colour.
The channel power displayed is the summed power of this area, according to the formula:
I did some measurements with the Siglent SSA3021X and the Deviser S7200, to get an idea of the Channel Power Meter Measurement precision.
Here are the results:
- The overall difference in readings of around 4dB results from different factors like:
- Varying signal power due to live transmission.
- Different connectors/adapters.
- Intrinsic errors.
- Measurements carried out at different RBW: the first picture shows my measurement at 100 samples - if I increase it to 1000 samples I get a slighly higher channel power reading, due to the higher resolution.