Hi Folks:
We've been having intermittent problems with 'interference' on
6.8 gig Alcatel radios and 5.8 gig (freeband) Proxim radios. I just
came into the radio shack, turned on the 'widow maker', a big heavy
spectrum analyzer, and instead of finding 5.8GHz internerence, I
found VERY strong pulses of RF around 4.9GHz. With my Blackberry about
5 feet away, the analyzer is showing a -10dbW (yes, 100mW) on a 2.4
gig antenna. It must be saturating the front ends. This Blackberry
comes through speakers with the preamps, and even televisions a good
10 feet away! It makes the computer monitor's screen shake almost
like the degauss! (when placed close). And, I suspect it does this
with it next to my head also, straight out the front and back of the
phone.
I was just looking at 4.9gig info and it seems to be allocated to
public safety. Is it also WiFi? The WiFi on this phone is off, at
least in the 'Connections', but that doesn't suprise me as laptops
seem to transmit on WiFi while connected to LAN. (Laptops' WiFi
knocks off the Proxim's, also)
Anyone ever scoped out the RF power from a Blackberry? Can this be
safe power levels?
Harry