I suspect that if you check it out Simon's 2.8 kHz
filter is narrower than a conventional crystal filter's 2.7 kHz
even at 30 dB down.
{^_^}
toggle quoted messageShow quoted text
On 20220214 08:31:46, Siegfried
Jackstien wrote:
... i
am also sometimes hard to you with my mails (too much info) ... or
sometimes are missunderstood from you
but its fun helping others with their setup ... i need such
positive feedbacks ... that is "ham spirit" to help .. not??
sdrc v3 does not come "factory tuned" .. there are a few settings
where you can finetune the receive and transmit
on the bird we should use 2.7 kc .... filters that come from
factory (from you simon) are ... 2.4, 2.6, 2.8 ... but no 2.7
agc is set to 130 db ... but it works better if you set that down
in the 80 to 70 db area (especially the noise reduction seems to
work better that way)
and lots of other setting i made on chris´s station ...
his problem is the missing ptt on the amp ... and he has to use
the evaristes datv fw to have the relay working
i am quite sure we find a working solution
greetz sigi dg9bfc
ps ... simon .. thank you for the flowers ;-)
Am 14.02.2022 um 14:36 schrieb Simon Brown:
Hi,
I'm hard on Sigi at times but he's an excellent resource and
tester.
Simon Brown, G4ELI
https://www.sdr-radio.com
-----Original Message-----
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
On Behalf Of Chris
Wilson
Sent: 14 February 2022 11:58
To: Simon Brown <main@SDR-Radio.groups.io>
Subject: Re: [SDR-Radio] Tricky drive level setting for SDR
Console to
Pluto, QO100
Hello Simon,
Sunday, February 13, 2022
Sigi DG9BF most kindly logged on to my PC via TeamViewer last
night and
spent a long time optimizing my SDR Console set up. He concurs
with me that
my issue is one of fickle drive level requirements for the SG
Labs 20W amp
which is currently triggered by the amps own internal VOX
circuitry. Enough
drive to trigger the VOX is often enough PA output to trigger
that whining
bint, Leila ;) He recommends I use a conventional PTT relay
circuit.
This may be a bit tricky in itself, as the Pluto firmware needed
to control
the Pluto PTT relays over my LAN (the Pluto is outside by the
dish) is not,
as far as I know, compatible with my DATV Portsdown 4 box, which
only works
with a very old firmware... I need to bend Sigi's ear about this
at some
time. Thanks for the replies Simon, Sigi is a fantastic
ambassador for your
software, treat him kindly!
Best regards,
Chris 2E0ILY mailto:chris@...
SB> One thing - you can always use the mouse wheel to adjust
a slider.
SB> Simon Brown, G4ELI
SB> https://www.sdr-radio.com
SB> -----Original Message-----
SB> From: main@SDR-Radio.groups.io
<main@SDR-Radio.groups.io> On Behalf
SB> Of Simon Brown
SB> Sent: 13 February 2022 06:48
SB> To: main@SDR-Radio.groups.io
SB> Subject: Re: [SDR-Radio] Tricky drive level setting for
SDR Console
SB> to Pluto, QO100
SB> Hi,
SB> A few screenshots would help.
SB> Simon Brown, G4ELI
SB> https://www.sdr-radio.com
SB> -----Original Message-----
SB> From: main@SDR-Radio.groups.io
<main@SDR-Radio.groups.io> On Behalf
SB> Of Chris Wilson
SB> Sent: 12 February 2022 11:51
SB> To: main@SDR-Radio.groups.io
SB> Subject: [SDR-Radio] Tricky drive level setting for SDR
Console to
SB> Pluto,
SB> QO100
SB> 12 February 2022
SB> I wonder if anyone can kindly help me with a drive issue
I am having
SB> with my PlutoSDR and transmitting to the QO100 satellite
via the
SB> narrow band transponder using SDR Console please?
SB> Recently I am finding setting the drive level is
incredibly tricky.
SB> Using the Tone or Tune functions in SDR Console a tad too
much drive
SB> level and the Leila, the satellite's too great a signal
level
SB> warning is triggered. I reduce drive until it is no
longer triggered
SB> and all is OK for some seconds, then it is triggered
again, as if my
power is increasing of its own accord.
SB> Once I find an acceptable level by very fine manipulation
of the
SB> drive slider but I then find that after a period of
reception there
SB> is no longer enough drive to set the Pluto / amp into TX
again.
SB> This appears to be a recent problem, as a while ago when
I was on
SB> the narrow band transponder with SSB I didn't seem to
have so much of an
issue.
SB> My set up is Windows 7 64 bit, SDR Console V 3.1, LAN
connection to
SB> my Pluto at the base of my 1.8 meter prime focus dish.
The Pluto is
SB> driving an Analogue Devices CN0417 pre amp driving an SG
labs 20W
SB> amp via a 6dB attenuator, which in turn is triggered by
its VOX PTT.
SB> The SG Labs amp then feeds the POTY antenna via a short
length of low
loss co-ax.
SB> MAYBE the attenuator is between the Pluto and the CN0417,
I can't
SB> reliably recall, and I am at work.
SB> My own, novice, thoughts are that to trigger the SG labs
amp via VOX
SB> is needing enough drive power to put its output around
the trigger
SB> point of Leila. Does that sound feasible? What about the
rise in
SB> output when TX'ing, and the fact a signal level adjusted
down when
SB> operating with Tune or Tone to stop triggering Leila
becomes
SB> insufficient to set the ensemble into TX at the next
transmission?
SB> Thanks for any advice. I could JUST get a signal on SSB
with only
SB> the CN0417, before I got the SG labs amp. I wanted a good
deal more
SB> power as I also run the set up on DATV on the wide band
QO100
SB> transponder. Best regards, Chris, 2E0ILY
SB> --
SB> Best regards,
SB> Chris
mailto:chris@...
SB> --
SB> - + - + -
SB> Please use https://forum.sdr-radio.com:4499/ when posting
questions or
SB> problems.
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