Brandon,
The PX3 (or P3) give a spectrum analysis of the portion of the band that
is included in the Span (up to 200 kHz) as well as a waterfall display.
Signals within that band can be identified as SSB, CW, PSK, RTTY and
many other modes on the spectrum display. The spectrum display is a
'real time' display of signals currently on the band.
The waterfall shows signals over time which shows signals that have been
present in the past. That is helpful for identifying weak signals.
With FlDigi (or other soundcard digital displays), you are looking at a
portion of the band that is as great as the filter in use in the
receiver (usually up to 2.7 to 3kHz wide - the bandwidth of the filters
being used in the transceiver). The modes that can be decoded depend on
the software application (FlDigi has many). There is no spectrum
display, you have only the waterfall. Click on the signal of interest
in the waterfall and it will be decoded as long as you have selected the
proper digital mode for that signal.
With the K3, when operating soundcard digital modes, you should be set
to DATA A rather than SSB (if decoding RTTY, set to AFSK A). Data modes
on the K3 (and KX3) automatically set the compression to zero and the TX
EQ to flat even though you may have different settings for SSB.
If compression or TX IQ is used for digital modes, distortion will
result. Yes, you can adjust those settings in SSB mode, but why bother
when the K3/KX3 will do that automatically for you by using DATA modes.
73,
Don W3FPR
On 4/8/2016 5:37 PM, Brendon Whateley wrote:
Presumably you can do similar tuning tricks in modes other than SSB?
I'm interested in this because I'm saving up for the PX3 to go with my KX3
and want it precisely so that I can see the other interesting signals on
the band.
Thanks,
- Brendon
KK6AYI
On Fri, Apr 8, 2016 at 10:27 AM, Bob Novas <bob.no...@verizon.net> wrote:
Dick - The P3 and Fldigi are really looking at very different signals and
have very different uses although there is some overlap, and that's what
maybe gets confusing. The P3 is a "fish finder" for a big hunk of a band -
the P3 looks at the K3's IF and can represent as much as 200kHz of it (but,
it can also represent a small portion of it, which is where it starts
looking like fldigi). Nevertheless, the P3 allows you to do things you
cannot do with fldigi. You can use the P3 to tune the radio to an SSB
signal visually - and by that I mean not only can you see the signal, but
also you can set the radio's receive frequency to be appropriate to receive
the signal without spinning the dial. You can also use the P3 to look at a
small span, and to decode RTTY -this is where it is like fldigi. But, in
my opinion, fldigi is a lot better at doing this than the P3, and on the
other hand, fldigi cannot do what the P3 can with respect to tuning or
visualizing band conditions. Bob W
3DK
-----Original Message-----
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Richard W Hemingway
Sent: Friday, April 08, 2016 12:29 PM
To: Elecraft Reflector
Subject: [Elecraft] (no subject)
Hi,I am rather new to this forum. I have recently bought a K3S and am
thinking
of buying both the P3 and the P3VGA. Presently, I am using Fldigi on my
computer and mostly operatewith PSK and sometimes some CW. If I buy
these
am I being redundant or does it make sense to buy them? I am hoping that
some of the members of this forum are using Fldigi and P3, and can
answer the
query. Thanks, Dick, N5XRD
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