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- Subject: Re: Hello
- From: Dave Sublette <arrl.net; k4to@xxxxxxxxxxxxxxxx>
- Date: Wed, 12 Dec 2007 10:09:41 -0500
My mistake--I should have been more clear.
In order to change my SDR-14 from the Direct (144 mhz) input to the 0-30
mhz input I have to send a command to the SDR. I can do that through the
Linrad program but must go back to where I can select the letter U
option. Then I have to enter all of the parameters again, including
which input of the SDR I want. It would be no problem if I had two SDRs
and use one on the 28 mhz IF and one on the 144 mhz IF. I may have to
buy another SDR of some type and run another session of Linrad in order
to use both simultaneously. I hope this clers things up a bit.
> Good morning Dave,
> My WSE systems are based on 144 MHz. This, naturally, makes the
> microwaves a snap. I just feed their converted 144 output to an SMA
> relay system selecting the correct band. The 50,222, and 432 bands are a
> bit tricky for me. They all convert to 28 MHz. I then use another
> converter to go from 28 back up to 144 for the WSE boxes. Having
> waterfall display the same intensity on all bands requires adding a
> cartridge type attenuator in the output of the 28-144 converter matching
> the signal level of the 144 band. I use tower mounted preamps on all
> bands except 50. Switching all converters with SMA relays keeps the
> system physically small.
> Dave, I don't understand what the "reset parameter" statement was about.
> Stan, KA1ZE/3
> In a message dated 12/12/2007 8:11:36 AM Eastern Standard Time,
> k4to@xxxxxxxx writes:
> Good morning Stan,
> I am using an SDR-14 with a switch box for muting and isolation. I use
> the 0-30 mhz input for my transverters on 50 thru 432 mhz and the
> input for the 903 thru 10368 transverters. The VHF tranverter IF's are
> all 28 mhz on on Orion II and the microwave stuff is 144 mhz IF
> going to
> a K2 with a DEMI two meter board in it.
> I also have found Linrad to be far superior to any other spectum
> processing and display program.
> I wish there was a simple way to switch the SDR inputs without
> having to
> reset all of the parameters, but fortunately I don't have to switch too
> Stanka1ze@xxxxxxx wrote:
> > Hello,
> > Welcome!
> > I have 2 systems of Linrad up and running.
> > Both are running version lir02-35. I am experimenting with
> lir02-39 and
> > will probably use it in the Jan08 ARRL contest. Both of my
> computers are
> > Windows XP and linrad was installed using the source code.
> > I also have 2 of the WSE hardware packages. One system is on
> > and 432. The other is being used to listen to the microwave bands.
> > I started using Linrad the last few years and have finally stopped
> > searching for the best receiving system. I am convinced, I FOUND IT.
> > Stan
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