What is your longest BH20 5.2Ghz link?

I have a 17mi link I need to install, from a 2300’ ASL tower location to a 600’ ASL remote location. Clear LOS. This is using the BH20 5.2Ghz w/ reflector.

I have a pair of surplus 5.2 radios, if I read Moto Marketing I should be able to do 35miles, if I read Moto technical, I’m limited to 5. Now I’m wondering if I need to pick up some 5.7 BH20’s (sadly though I have PTP400 and PTP600 in 5.8 freq at this same tower).

Also, I used to have a document on calculating the angle of inclination and declination for these units but can’t find it now. Probably buried in one of the old support documents somewhere.

Being that 5.2ghz is a low power band, I would go with a 2.4ghz bh if you noise floor can handle it. If not then a 5.4ghz ptp series should do the trick.

5.2 and 5.4 are EIRP limited to 32dB regardless of whether a dish is used or not.

I’d go 2.4.

I have a 7.09 mile link in at 5.2Ghz and if it had a cleaner fresnel we’d see higher throughputs. This link was in before I started here so the engineering parts were all fubar’d during initial planning.

Using the 5.2 extended range you shouldn’t expect to go beyond 10 miles.

If you need to do 17, I suggest 5.7/5.8 or 2.4 product.

amd phreak wrote:
I have a 7.09 mile link in at 5.2Ghz and if it had a cleaner fresnel we'd see higher throughputs. This link was in before I started here so the engineering parts were all fubar'd during initial planning.

Using the 5.2 extended range you shouldn't expect to go beyond 10 miles.

If you need to do 17, I suggest 5.7/5.8 or 2.4 product.


I just found the old documentation and sure enough, 10mi is the limit on the 5.2 w/ reflectors. Argh, looks like I'll need to pick up a pair of 2.4 BH units.

I have a PTP400 and PTP600 on this same tower so I'll have to use a different freq for this link.

Thanks for the confirmation guys, appreciate it.