I forgot a couple items:
1. the noise is between from 15-meters through 30-meters.
2. I did a cold start up test too. Shut everything down for 12 hours
and tested immediately after bring everything back up.
I normally leave the radio powered up because it has a difficult time
getting onto frequency. It take a few power cycles to get the SDR-1000
on frequency, but once on, it stays on frequency.
Dan Scott wrote:
I've been fighting what I thought was an RFI problem. To the point of
connecting the radio to a Battery and swapping out the computer's UPS
with different one as well as testing with a power inverter. Obviously
I turned off all power in the house for the test. What looks like RFI
remained.
Anyway what I eventually did was ... think. That is, I asked myself
the question "What was the last thing that changed?". Hmmm .. Oh, I
installed 1.18.3.
Anyway for a 1.18.2 vs. 1.18.3 comparison with a dummy load for
antenna and a fresh database when swapping between version:
Noise Floor
-- V1.18.2 = S1
-- V1.18.3 = S3
Waterfall
-- V1.18.2 = blank with a couple off freq spurs
-- V1.18.3 = green with a solid noise line every kc.. i.e. 14.200,
14.201, 14.202...etc. not exactly but general idea.
When connected to an antenna, the Noise Floor of v1.18.3 is always 2db
to 3db higher than that of v1.18.2. Also another radio was used to
verify if the higher noise floor was just a metering difference or a
if 1.18.3 was imposing additional noise. The result is the FT-100
could receive SSB, CW, and digital which the SDR1000 with 18.2.3
covered up with noise. With 1.18.2 the SDR-1000 easily out received
the FT-100.
I did not see anything else on this problem in the forum, meaning I'm
rather poor at finding things (true!) or the problem is isolated to my
setup. I have not tried swapping PCs yet, hoping for a resolution
before having to do that painful test.
The rig is a SDR1000 with FA66. Parallel cable is used. Computer
(homebuilt quad-core) runs 7% - 13% while using PowerSDR along with
DDUtil, DX Commander (without WW), and N1MM (if not a couple other
odds-n-ends). This exact hardware setup has been running flawlessly
for at least 1 year.
Thanks
Dan
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