I've been considering doing just that for PSK. It's fairly east to
enable
the existing PSK (or RTTY) mode buttons on the console and then use their
click event to set the radio up to whatever you want. Main reason I want
to
do it is because I keep forgetting to run the power down when I start
PSK31.
The only problem from a third-party standpoint is whether or not they
support a corresponding mode button in their software. Not a problem for
HRD or DXLab since they have been super cooperative in matching the SDR1K
interface, but you might have to manually switch the SDR console for some
of
the others.
Bob K5KDN
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Larry Loen
Sent: Friday, July 29, 2005 10:46 PM
To: [email protected]
Subject: [Flexradio] Power fluxuations on 1.4.3 RTTY modes
It took me a while, but I've tracked something down.
When I run any RTTY mode under 1.4.3, power output levels fluxuate in a
way they don't in 1.4.1.
When I set the power level in 1.4.1, and transmit, the wattage is what
it has been since I started doing RTTY (about a month or two back is
all).
If I set PWR where I get 25 watts on a given band, that's where it
transmits.
On 1.4.3, however, power level fluxuates, especially (it superficially
appears) when space characters are transmitted. Or, maybe it's not
space characters. But, the output can drop to near zero. I've had
several cases where it kind of hangs out a half power or two thirds.
The wattmeter on my MFJ, always reliable in the past, shows the
fluxuation as does the SDR power output indications.
There is, by contrast, little or no fluxuation on 1.4.1.
Now, I am making contacts, but the low power levels have probably cost
me a few. The obvious workaround is to use 1.4.1 for RTTY.
But, in terms of what was changed recently, could it be a cause? The
obvious stuff (compressor and compandor) are "off" and set to 0 dB gain
in any event.
Independent of this, I'm beginning to wonder if we need a new
"pseudo-mode" which would be "digital SSB". It would go to upper side
band, but it would set the power output to a lower level and make the
other needed adjustments (like forcing the compandor and compactor to
off) that are starting to become necessary. Making that work with 3rd
party software via CAT could be a bit of a challenge, though, since one
presumes that we want the regular SSB to still respond and at least so
far, we haven't put in our own RTTY modes into the base console.
Larry WO0Z
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