Re: [Hamlib-developer] Why hamlib is not really suited for satellite radios

[Luc L. <lx...@gm...>]

Am Do 05 Sep 2002 22:42 schrieb al...@ph...:
> Hi Luc,
>
> I can not help you with your IC901 specific problems, but I can put a
> couple of words in for Hamlib.
>
> The basic idea behind Hamlib is to provide a single and unified API for=
 all
> radios that can be controlled by a computer. This is a very noble idea =
even
> if some fancy functions specific to this or that radio have to be left =
out
> for the greater good.

I have to fully agree with you!

>
> Now, I understand that you want to tune your radio to a satellite frequ=
ency
> and to do that, you need to correct for the doppler shift. You could do
> that by calculating the correct frequency in your program and using the
> rig_set_freq() function of the Hamlib API. Thus you can be sure, that y=
our
> program will work with any radio which is supported by Hamlib and which=
 is
> able to tune to the desired frequency. On the other hand, if you insist=
 on
> using some fancy automatic doppler correction function that is availabl=
e on
> a few sat-comm radios, you can be certain, that your code will only wor=
k
> with these radios and not with the traditional VHF/UHF radios.
>
> I think the choice is obvious... Hamlib is the way to go!
>

Yes, hamlib is the first choice. Actually using it will give the users co=
ntrol=20
of most of the rigs out there. Currently I am working on an class that wi=
ll=20
control up to 2 rigs... one for the uplink and one for the downlink (no=20
problem in this case) or only control one radio for both frequncies. Here=
 I=20
am not shure how other radios do work. In the case of my ICOM910, uplink =
is=20
the sub band, and downlink the main band. Are the FT847 / TS2000 the same=
?=20
Don't know. Will be an future brand new Rig the same? I don't know. So, f=
or=20
now I will assume that sub band will be the uplink band.

Concerning the IC910 I will need to pay attention to the current bands, a=
nd=20
swap main / sub to be able to set different bands on the radio. For this =
I=20
still think hamlib should do that automatically!

Luc


>
> Alex, OZ9AEC
>
> Quoting lx...@gm...:
> > Hello,
> >
> > As I am currently rewriting the entire radio control code for ktrack,=
 I
> > took
> > a closer look at hamlib. But I am really disapointed as with it's
> > curent
> > status it is not useable for controlling satellite radios for automat=
ic
> > doppler
> > correction.
> >
> > One of the problem is the sub band. How do I change it at a way that
> > does
> > work with every radio? On my IC-910 I have to enable the sub band - s=
et
> > the
> > frequency - and disable it. The code should really do that at is own.=
 In
> > the
> > case of the ic910 there is another problem. I want to set a frequency=
 of
> > 145.950
> > - but the transceiver has currently 70cm on the main band. I have to
> > retrieve the current frequency - look if I need to swap the bands - a=
nd
> > swap them if
> > needed. This is very IC910 specific - why does I have to do it?
> >
> > Note... these 2 examples are only for the IC910 - not for the other
> > satellite radios. So, for every satellite radio I still need my
> > satellite dependent
> > code? I even don't know if the sub band is uplink or downlink on the
> > different
> > radios.
> >
> > Note, this is not meant flaming about hamlib. Hamlib is a neat projec=
t,
> > and
> > the right direction for rig control - but in it's current state not
> > really
> > useable for satellite radios.
> >
> > 73, Luc
> >
> > --
> > GMX - Die Kommunikationsplattform im Internet.
> > http://www.gmx.net
> >
> >
> >
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