I operate RTTY primarily. I can distinctly see both the mark and
space tones cleanly separated on the panadaptor, and they are only
170 Hz apart. I routinely click on the panadaptor to tune rtty
signals and rarely have to tune more than 40 Hz with the mouse wheel
to fine-tune after the "rough" click-tune.
I suspect you are seeing an extremely wide bandwidth on the
panadaptor, and that is preventing you from seeing fine detail. I
routinely watch a 25 - 30 KHz segment to get the above hi-rez performance.
I have used panadaptors on my radios since the early '70's when Heath
offered the first one for hams. I have never seen as good a
panadaptor as PowerSDR provides, and that includes 756PRO3s that I
formerly used here. I couldn't even tell if a signal was RTTY or CW
on the 756PRO3 while watching the same 25KHz band segment.
Jerry W4UK
At 11:22 PM 10/1/2009, Dudley Hurry wrote:
Brett,
All I can say is you must have the display really messed up.. I
would suggest a database reset to get back to the defaults. Start
with 96K or 48 K sample rate and then go to 4X in the
panadapter, change the panadapter to "AVG", and then go to display
tab of Setup and increase the "Main Display FPS" (Frames per
Sec) and if that doesn't convince you then, ...
The Icom display does not even show the signal on the correct sideband,
and very poor resolution.
73,
Dudley
WA5QPZ
Brett Gazdzinski wrote:
No I am not kidding.
The Icom had a smaller display but showed more information it seemed.
Maybe something is not right with my setup, as I could not begin to
tell the bandwidth of an AM signal. It shows a sharp spike
(carrier) and very little modulation.
The waterfall display seems ok.
SSB is quite clear.
I have had other sdr's and spectrum analyzers and think as you
change the amplitude scale the signal should reflect it. (like it
does on spectrum analyzers).
If you change from 1db per division, to 10 db per division, the
signal should not stay the same size.....
What is the point of being able to adjust it?
Brett
----- Original Message ----- From: "Dudley Hurry" <jhu...@austin.rr.com>
To: "Brett Gazdzinski" <brett.gazdzin...@verizon.net>
Cc: "Flex-Radio E-Mail Reflector" <flexradio@flex-radio.biz>
Sent: Thursday, October 01, 2009 4:18 PM
Subject: Re: [Flexradio] Various things...
Brett,
You have to be kidding.. Right? I can view a AM signal, even
tell the audio response on each sideband, exactly if I move the
cursor over the signal and read the frequency response in the
lower left of the panadapter.
You can monitor your AM signal in the Flex 5000 with the RX2 option,
view it in the lower panadapter.
I will tell you that the panadapter does take a lot of CPU to
display, so if you are having to slow the display refresh down,
this will cause the display to be less reactive.
73,
Dudley
WA5QPZ
Brett Gazdzinski wrote:
Well, I have put the 5000a through its paces, and have some questions.
The panadaptor and scope displays seem very poor, I am used to
being able to see signals much more pronounced, I have adjusted
the scale and other options with no improvement.
Its hard to see (on the panadaptor) how wide an AM signal is,
the scope display does not show the carrier with modulation, and
another odd thing, when an AM signal stops talking, the noise
level goes up, unlike a normal AM receiver where the carrier
quiets the receiver even with no speech.
I can adjust the agc and improve things but it seems to need
adjustment for various signal strengths, where a normal receiver
handles weak and strong signals without any adjustemt needed....
I spent a lot of time compairing the homebrew receiver to the
flex, and the homebrew seems much better in most respects.
I am a little disapointed in the displays on the flex, the
resolution seems very poor, or is there something I am overlooking?
Also, there is no way I can monitor my outgoing audio, because
its so delayed, even if I make the buffers as small as is
allowed. That is partly a slow PC I guess...
Brett
N2DTS
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