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SDR1000 IQ Signal Recordings


kd5nwa
 

I have a couple of simple questions to the group.

I'm awaiting a SR-40 radio to come in, in the meantime I have setup several PC's to hook up the the radio, and I have installed the software. I noticed something funny last night, my other four PC's do the same thing.

While listening to a IQ recording there is practically no noise at all, this a particular recording is of a 40 meter CW contest. Even when I tune in-between signals there is no noise. I played with the squelch settings, no change, the filters are off.

My question is, when someone with a SDR1000 radio makes a recording does it record the raw band data, or does it record it after whatever filters the user has applied?

I have several recordings and they are all the same, no noise. The funny thing is on the scope you can see noise and sometimes weak signals that rise about 4 to 7 db above the noise level and when you tune them you get nothing, no audio out, even when you can see a weak signal there.

I'm using the version 1.4.4 with the Soft-Rock modifications, is there a bug where the squelch is on all the time?

Setup;

Dell Precision 220
2X Pentium III
512 Meg Ram
Win2K SP4
.Net V1.1 SP1
DirectX 9
MDAC 2.8 SP1
Flex software with Soft-Rock patch V1.4.4
ASIO4All V1.8 (Latest), I tried ASIO and MME drivers, do difference.
SB Live 24 (Pci), SB Live, SB Audigy 2 Zs, Built in SoundMax Digital Audio, I tried all these cards.

The System is patched up with all the latest security patches from Microsoft.

--
Cecil Bayona
KD5NWA
<www.qrpradio.com>

I fail to see why doing the same thing over and over and getting the same results every time is insanity: I've almost proved it isn't; only a few more tests now and I'm sure results will differ this time ...

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