Hi David,
I found it possible to compare down to the mHz region for the 1kHz
tones, but of course it requires good propagation, hanging around for
the continuous carrier periods of RWM and a disproportionate level of
patience!
Patience is something I need more of! But in terms of the R8500, I found
that adjusting the trimmer to as near as 1 Hz at 15 MHz was quite tricky.
A GPSDO is certainly the way to go for a quick, reliable and highly
accurate frequency reference - and it's a godsend if you have test gear
with a reference input. In fact a pal of mine has recently bought a
TS950 transceiver which already has an input for a 10MHz reference -
sadly my IC756Pro2 doesn't have that but at least I can check it
accurately.
Yes, that would be handy. Except that you'll then start wanting to take
your reference when going out portable!
You'll probably find, like me, that once you have cracked the issue of
frequency accuracy you'll start fretting about amplitude accuracy when
you test and align things!
All the best,
David, G4IRQ
Yes, I can imagine, but that will have to wait! I was sorely tempted by
the spectrum analyser & tracking generator reviewed in the recent RadCom,
but I don't think I would use it enough, let alone justify the cost.
PS. When locating the GPS aerial, if possible try and get a clear view
from W, through South and around to East. That arc is where you'll see
the most satellites; from NW through North to NE has poor coverage.
Yes, I have four GPS antennas for timekeeping here already, one outside (a
Garmin GPS 18 LVC on the roof, sloping towards the west) and three
indoor - two Sure and one GPS 18x LVC. In my WXtrack software, I wrote a
function which shows the number of satellites visible in a particular
quadrant during the day. I also wrote a program which read the messages
coming a GPS 12XL I have and plotted the actual satellites seen at this
location.
73,
David GM8ARV
--
SatSignal software - quality software written to your requirements
Web: http://www.satsignal.eu
Email: [email protected]
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