@JoshB wrote:Ok - so the separation needs to be completely different bands? 5.1/5.8/etc?
No. Assuming you're using sync, with ePMP you can use as little as a 5MHz guard band between channels. Horns also have excellent F/B ratios and tight beam patterns with no side-lobes, so you can sometimes get away without using any guard band, depending on physical spacing and coverage overlap.
Do we need to enable "colocation" mode and choose a front/back sector? Isn't that just for frequency re-use?
No, you only use colocation mode when sync'ing with PMP100/PMP450 radios. No, you only choose front/back sector modes when you're using back to back frequency reuse on two radios.
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