FLARM
is an aircraft collision warning system. Each end
knows where is it by GPS and every second transmits is
location, velocity and heading on a common channel.
?
Approaching
aircraft hear the pings of other FLARM equipped
aircraft an calculate whether there is going to be a
collision. If it thinks there is danger it beeps
loudly to the pilot to take avoiding action. The beeps
get faster as the nature of the danger increases. It
is generally regarded that if you get a beep it is a
failure of lookout, but lookout is never perfect and
all pilots get beeps. Glider pilots fly for miles
towards good-looking clouds and hence find themselves
unwittingly ?flying toward each other. In the Alps
gliders fly in the updrafts very to the mountains and
meet other aircraft head-on as they go around corners
¨C it was that community that first developed FLARM.
It¡¯s a life-saver.
?
The
glider antenna installation is generally a monopole
and ground plane somewhere in the dash in front of the
pilot. The usual installation errors I get invited to
diagnose are owing to short range and arise from
antenna de-tuning by nearby objects, noise from other
equipment, (mostly data lines and switching PSUs), and
obstruction such as by parts of the aircraft made of,
or repaired in carbon fibre.
?
Sometimes
its hard to get away from playing radio to actually
get to go flying. Lol
?
Rgds
?
Colin
?
Hi
colin
?
OK
on portability by the way I always put instruments
with a tube on the back seat so as not to brake the
tube
Ok
could you please explain
aircraft
866MHz FLARM systems
?
And
yes the tracking generators I have only go to 1300 mhz
?
Regards
Paul
?
A
Spec An and sweeper and an external 3dB hybrid to act
as reflectometer enable such a wealth of measurements
that I¡¯d be lost without the tracking gen. Surely it
can only be lack of demonstrations showing people what
can be done with this combination that is the answer
to your question.
?
People
will have read my comments about calibrating the
8920A. For something robust enough to survive in the
boot (sorry ¨C trunk) it is always with me at ham radio
events and at the gliding club where I get to test and
repair many things such as UHF ground radios, VHF
airiband radios, aircraft 866MHz FLARM systems. Oh,
and the remote Davis Vantage Vue weather station ¨C we
have it operating at 2km range with >99% uptime.
The 8920 is the goto instrument and always has the
hybrid hanging off the front for measuring all of
these types of antenna. No sweeper? ¨C non starter.
Shame it stops at 1GHz.
?
Rgds
?
Colin
?
?
Hi
all
?
During
the last year on a number of sites I have seen several
requests for people buying their fist spectrum
analyser and all have spoken about wanting a tracking
generator
?
I
personally have only used an analyser with a tracking
generator a few times in my life and that was 35 years
ago a Marconi 110 Mhz spectrum analyser for setting up
IF ?filters
?
In
my early days I started using swappers and diode
detectors or power meters with an oscilloscope then
moved onto Scaler analysers
?
Could
it be the new people are not familiar with other test
equipment and think a spectrum analyser is the only
tool they require and unaware of sweepers and Scalier
analysers
?
Your
comments please ??Regards Paul
?
?
?
Does 8594E have tracking
generator..?
May be interested in TG parts...
_Dave KC6UPS
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