A similar idea can be found here: http://community.cambiumnetworks.com/t5/Your-Ideas/SYNC-d-AP-Spectrum-analysis-listens-only-during-receive-window/idi-p/37371
This has a secondary benefit in high noise environments; it lets me tell sync'd noise from unsync'd noise. If the entire spectrum is blocked, I'm much better off broadcasting where the sync'd noise is located.
At the same time, this would give me a way to test to see how well our Cambium equipment synchronises with our competitors' non-Cambium products. Tweak the settings, rung a listen-only spectrum. Continue until the noise in the listen-only spectrum goes away.