My issue is with the LTC5536 being used to detect 802.11n (2.4 GHz) transmissions from a WiFi radio, and the comparator output is being used to switch RF switches to route the signal to an amplifier, and turn the PA on. The circuit is attached.
The issue is I'm seeing what looks like rail-to-rail switch bouncing, or indecision on the comparator for a short time during some pulse detections, and sometimes not, and sometimes for only part of the pulse. The net result of this is lots of spurious noise on the spectrum.
Attachment "scope_4.png" shows two different types of Vout result - both with the switching issues and without.
Attachment "scope_1.png" shows Vout exhibiting this switching issue, and then not.
Attachment "scope_3.png" shows a zoomed in look at the switching issue.
Do you have any hints or tips in tracking this one down?
Different types of WiFi packets could explain the difference in waveforms. In addition to the LTC5536 detector with comparator output, you may wish to also try the LTC5535 as an experiment. LTC5535 has analog output; no comparator. This will show the WiFi power envelope and timing, thus making signal identification easier.