I'm new to these forums and could use some advice. The attached video is a recording of interference at a commercial location in Menlo Park, CA. We'd like to deploy a 900MHz device (802.15.4 radio) in proximity to this and are trying to assess the risk.

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As you can see, there seem to be periodic peaks at both 921 and 926 MHz, but there is also a lot of spread-spectrum noise that suggests a search or frequency-hopping routine.

Any suggestions on the source of the interference might be would be helpful. Does it look like any of the following?
-cordless phone
-wireless video camera
-wireless sensors for security

Thanks in advance!

BTW I have a 4MB screen recording (Quicktime movie) that I was unable to upload but can send on request.