Basil,toggle quoted messageShow quoted text
Found what I thought I remembered about IC-7000 data port sensitivity in the
SignaLink FAQ at www.tigertronics.com. Obviously this will have an impact on
DRAWS setup and operation with the IC-746Pro and the FT-450 as well.
Naturally, older radios will get pressed into field service - these just
happen to be commonly available and are "shelf spares" in quite a few
shacks. I am going to see if I can find more about the solutions to this
"ATTENTION IC-7000, IC-746PRO and FT-450 Users - Some customers have
reported that these radios have unusually sensitive Data Ports, which can
make adjustment of the SignaLink's TX knob somewhat difficult. If this is
the case with your radio, then *you should find that the procedure above
where you install jumper JP4 and lower the Wave volume control resolves the
issue*. However, you may also need to turn the radio's RF Power menu
setting down for better control. A power setting of 35 to 45 watts usually
works well for 25 to 35 watts of actual RF output as measured on a watt
meter, or the radios Power Output meter. "
Jack - KD4IZ
From: email@example.com <firstname.lastname@example.org> On
Behalf Of Basil Gunn
Sent: Sunday, December 23, 2018 17:58
Subject: Re: [udrc] Status: IC-7000 Audio Levels for V/UHF and HF modes
#draws #ic7000 #hfmodes
First of all, thanks for all the time you are putting in.
See suggestion for PCM, LO Drive gain below.
Tried to take a scientific/stepwise approach with setting the DRAWSis being consistent.
Check this out by John Ackermann N8UR
Look for: "The No-Test-Equipment Packet Adjustment System"
Do you have a handy talky?
use the measure_deviate script: n7nix/deviation/measure_deviate.sh
Pick a tone, bring-up alsamixer Set PCM to 0db & drop LO Drive until there
is no clipping ie. no distortion or just follow John Ackermann's suggestion.
UHF - have not tried anything yet. TBDtested. TBD:
So the PCM/LO Driver Gain level settings that "work" in fldigi, don'tI don't have an answer but your description is a good data point.
Here are my current alsamixer settings:So PCM set that low is very suspicious. It means you are not using many
bits of the CODEC. I would play with returning PCM at least close to zero &
dropping LO Driver Gain down.
I am stuck until I can figure out how to coerce wsjt-x intoprovided in fldigi.
At this point I don't even care if the overdrive issue isn't solved. IYep. I understand.
Thanks for thinking this through with me.Thanks for taking such a methodical approach.
Science River LLC