Joe, others:
There are many issues with the old digitalagc. It has been replaced in
the next release with
a complete rewrite by Frank and I but we can and should go further.
Alex, VE3NEA, has
proposed a very interesting and complex structure with high
computational complexity that
I am considering. It is based on attempting to maintain a set SNR to
relieve fatigue. I
make a living by taking things of high computational complexity and
finding good approximations
at much reduced computational complexity but ideas are needed before I
jump headlong
into this.
We are in the midst of doing our best to "perfect" this agc. It is at
the heart of what makes this
radio so different in that it cannot be captured by strong out of
passband signals.
Bob
Joe - AB1DO wrote:
I have investigated this clicking further and discovered that the
clicking disappears when I set the AGC to fixed (both NR and ANF still
on). With the AGC set to fixed, I then went to the SDR setup DSP tab
and increased the fixed gain using the little up/down arrows to the
right of the list box. With each increase I heard the same click,
which became louder as the AGC gain increased. If I adjusted any other
list box I heard nothing. To me this would seem to indicate that with
the AGC on any other setting other than fixed, as the AGC adjusts the
gain value, a click is audible.
I hope this useful to anyone to help me solve this issue.
Joe
Hi All,
On SSB *receive*, I am experiencing soft clicking sounds when *both*
the NR and ANF are on. I have played with many combinations of DSP
settings and audio sample sizes, but nothing seems to help, nor does
cycling power on/standby. CPU usage is around 10%. Does anyone have
any ideas?
My setup is as follows: Dell dimension 3000 computer (P4 HT 3GHz, 1Gb
RAM, XP Home SP2), the Delta-44 sound card with HOSA cable set and
audio run through a Behringer UB802 mixer (mic preamp and headphone
amp). I have not adjusted either the card line-in gain (20) or the
output voltage (.98) in the SDR setup audio tab.
73 de Joe, AB1DO
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