Hello Faisal,
a small annecdote about GPS jamming from the design of our FireFox GPS
Disciplined synthesizers:
We have a broadband synthesizer driven by a GPSDO on the same PCB. This
synthesizer would completely swamp out the GPS receiption if you set it to
1574MHz CW output, the on-board noise was so powerfull (the output of the unit
can
be set from DC to 1640MHz). Our output can go up to +18dBm, millions of times
more power than the GPS signal itself...
The effect was that the M12+ receiver would just loose lock within a +-5 -
10MHz bandwidth around the GPS carrier. The receiver would show 0 sattelites
being received. As soon as you set the frequency outside of this band,
everything was fine.
We improved this by putting the GPS board into a metal shield. So the effect
of noise generated inside the enclosure was greatly mitigated.
But the CW power radiated by the BNC connector itself on the unit is still
enough to find its way to the antenna 10 meters away and about 3m above it, and
swamp the signal!
Putting a small paperclip into the BNC RF output connector at +18dBm at
1574MHz would probably cause a couple of blocks in our neighbourhood to loose
GPS
lock :)
Never tried this and never will of course.
bye,
Said
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