[Discuss-gnuradio] My pulsy little friend

[Marcus Leech]

I tracked the technical details of my pulse interference down.  It's the 
ramp radar at Ottawa airport, nearly 80km from
 where I am.   The radar rotates at 12RPM, which explains me seeing it 
every 5 seconds.  The transmitter produces
 pulses at about 600Hz, with both 1us and 100us pulses.  I got this 
from one of their technical people.  The transmitter
 produces 21.5KW of peak power, into a 32dBi antenna.  The sidebands 
are suppressed by only 40dB, which is rather
 poorer than I'd expect.  That means that there may be significant 
energy at 1400Mhz being injected into that +32dBi antenna of
 theirs.   Boo, hiss.

The weather has been lousy for the last couple of days, which curiously 
enough has caused the radar interference to
 subside.  But with the heavy cloud cover and rain, my baseline is 
about 5 times wobblier than usual.