RF Caused By SDR-IQ
 

On Jun 3, 3:22 pm, "Ron Baker, Pluralitas!" wrote:
"bm" wrote in message

ups.com...

There are many SDRs available today; the Winradio G-series is possibly
the best known. The Flexradio SDR-1000 (now replaced) and the RF Space
SDR-14 and SDR-IQ have properties most other SDRs do not have; the
ability to record a large (up to 190 kHz) portion of the spectrum to a
PC hard drive. The recording can later be analyzed using different
demodulators, bandwidth settings etc.

Ordinary front end filtering is difficult to match with a 190 kHz
spectrum, hence one might need extra high-/lowpass filter or even
notch filters to avoid very strong signals.

The SDR-IQ does emit RFI on higher shortwave, masking very weak but
audible signals. I didn't know until I was informed about it but I
only use higher SW for listening to strong international stations.

So you have one. Interesting.

There is no RFI on lower SW and MW. I don't know if this is also the
case with the SDR-14 and the Flexradio systems. For me the RFI is a
non-issue; for others it may be very important.

Every radio has its birdies. My TS-440 probably has about 20.
And I always have my CRT computer monitor on which
puts out spurs spaced 63 kHz through half of the HF band.

I wonder how strong and wide the interference from the
SDR-IQ is. Maybe it is normal. Maybe it will be reduced
once they go through FCC certification and the boxed version
is available.



For me, the ability to record 19 MW channels into a file for later
analysis far outweighs the RFI and front end issues with the SDR-IQ.
Others may judge otherwise or have a more hostile RF environment.

Yeah, the SDR-IQ has a lot of good applications.

Checking the TS-440, it covers HF with 10 filters of
varying width. One filter selects 0.5 to 1.5 MHz.
So when tuned to MW the whole
band is coming through the front end filter at one time.
A serious MW DXer might consider a preselector even
with an old style receiver.

I looked at the digital receivers a while back and pretty
much decided that I would go with the RX-320D when
I could afford to lose a week playing with a new toy.
But the SDR-IQ looks like it could go to the top of
the list.

--
rb

The thing I'd be curious about is the software. I can't find anything
very descriptive of the software on the website. I suppose I could
download it, install it and play around with it, but I don't like to
install software on my system unless I really need it. Perhaps someone
who has used it can comment? I'd also like to know how many
commercial, third party control softwares could be used with this
receiver.

Steve

RF Caused By SDR-IQ
 

There's no problem downloading and installing Spectravue. Easy to
uninstall. There is a "Winrad" software too but no AM demod on it yet.
Don't think other programs can run the SDR-IQ or -14. DRM: Use 3rd
party software like Dream. Spectravue has a learning curve and is not
always intuitive.

The thing I'd be curious about is the software. I can't find anything
very descriptive of the software on the website. I suppose I could
download it, install it and play around with it, but I don't like to
install software on my system unless I really need it. Perhaps someone
who has used it can comment? I'd also like to know how many
commercial, third party control softwares could be used with this
receiver.

Steve

? WHAT IS : A Software Defined Radio (SDR) ?
 

On Jun 4, 1:43 am, bm wrote:

- - Looks like they now have SDR Transceivers too ! ~ RHF

- Old news.
- SDR-1000 is discontinued,
- replaced with Flex-5000A
- at USD 2500.

BM - Yes it may be 'old news' but hey at least it was
"On Topic" -and- for me that's a plus :o) ~ RHF
-

BM - That would be the FlexRadio FLEX-5000A
High Performance Software Defined Radio and Transmitter
http://www.flex-radio.com/Products.a...c=F5Ka_details

* The FlexRadio FLEX-5000 Radio Features
http://www.flex-radio.com/Products.a...c=f5k_features

* Flex-Radio Support Knowledge Base
http://kb.flex-radio.com/?cNode=4N1V6W&pNodes=2O1N8M

* FLEX-5000 Transceiver Family FAQ
http://kb.flex-radio.com/article.aspx?id=10374

? WHAT IS : A Software Defined Radio (SDR) ?
? What are Software Defined Radios (SDRs) ?
FlexRadio Systems delivers the only truly 'open source'
SDR = http://web.flex-radio.com/About.aspx?topic=whatissdr
Software Defined Radio (SDR) Transceivers for Amateur Radio [Ham]

ABOUT - FlexRadio Systems - The Leader in
Software Defined Radios (SDRs) for Amateur Radio [Hams]
http://web.flex-radio.com/default.aspx

* The History of FlexRadio Systems
http://web.flex-radio.com/About.aspx?topic=history


just trying to be flexable in what i post ~ RHF

"The SDR-1000 Blog Spot" - Mediumwave and Tropical Bands DXing with the FlexRadio SDR-1000 Radio
 

On Jun 4, 8:31 am, RHF wrote:
On Jun 4, 1:43 am, bm wrote:

- - Looks like they now have SDR Transceivers too ! ~ RHF

- Old news.
- SDR-1000 is discontinued,
- replaced with Flex-5000A
- at USD 2500.

BM - Yes it may be 'old news' but hey at least it was
"On Topic" -and- for me that's a plus :o) ~ RHF
-

BM - That would be the FlexRadio FLEX-5000A
High Performance Software Defined Radio and Transmitterhttp://www.flex-radio.com/Products.aspx?topic=F5Ka_details

* The FlexRadio FLEX-5000 Radio Featureshttp://www.flex-radio.com/Products.aspx?topic=f5k_features

* Flex-Radio Support Knowledge Basehttp://kb.flex-radio.com/?cNode=4N1V6W&pNodes=2O1N8M

* FLEX-5000 Transceiver Family FAQhttp://kb.flex-radio.com/article.aspx?id=10374

- ? WHAT IS : A Software Defined Radio (SDR) ?
- ? What are Software Defined Radios (SDRs) ?
- FlexRadio Systems delivers the only truly 'open source'
- SDR =http://web.flex-radio.com/About.aspx?topic=whatissdr
- Software Defined Radio (SDR) Transceivers for Amateur Radio [Ham]
-
- ABOUT - FlexRadio Systems - The Leader in
- Software Defined Radios (SDRs) for Amateur Radio [Hams]
- http://web.flex-radio.com/default.aspx
-
- * The History of Flex Radio Systems
- http://web.flex-radio.com/About.aspx?topic=history
-
- just trying to be flexable in what i post ~ RHF
- .
- .
- . .
-

Mediumwave and Tropical Bands DXing with the SDR-1000 Radio
from FlexRadio Systems - "The SDR-1000 Blog Spot"
SDR*1000 = www.sdr-1000.blogspot.com
-by- Guy Atkins - Puyallup, WA

* Software Defined Radio (SDR)

for those who are interested in a 'sdr' ~ RHF

"The SDR-1000 Blog Spot" - Mediumwave (AM/MW) and Tropical Bands DXing with the FlexRadio SDR-1000 Radio
 

On Jun 4, 8:31 am, RHF wrote:
On Jun 4, 1:43 am, bm wrote:

- - Looks like they now have SDR Transceivers too ! ~ RHF

- Old news.
- SDR-1000 is discontinued,
- replaced with Flex-5000A
- at USD 2500.

BM - Yes it may be 'old news' but hey at least it was
"On Topic" -and- for me that's a plus :o) ~ RHF
-

BM - That would be the FlexRadio FLEX-5000A
High Performance Software Defined Radio and Transmitterhttp://www.flex-radio.com/Products.aspx?topic=F5Ka_details

* The FlexRadio FLEX-5000 Radio Featureshttp://www.flex-radio.com/Products.aspx?topic=f5k_features

* Flex-Radio Support Knowledge Basehttp://kb.flex-radio.com/?cNode=4N1V6W&pNodes=2O1N8M

* FLEX-5000 Transceiver Family FAQhttp://kb.flex-radio.com/article.aspx?id=10374


-
- ? WHAT IS : A Software Defined Radio (SDR) ?
- ? What are Software Defined Radios (SDRs) ?
- FlexRadio Systems delivers the only truly 'open source'
- SDR =http://web.flex-radio.com/About.aspx?topic=whatissdr
- Software Defined Radio (SDR) Transceivers for Amateur Radio [Ham]
-
- ABOUT - FlexRadio Systems - The Leader in
- Software Defined Radios (SDRs) for Amateur Radio [Hams]
- http://web.flex-radio.com/default.aspx
-
- * The History of Flex Radio Systems
- http://web.flex-radio.com/About.aspx?topic=history
-
- just trying to be flexable in what i post ~ RHF
- .
- .
- . .
-

READ - Mediumwave (AM/MW) and Tropical Bands DXing
with the SDR-1000 Radio from FlexRadio Systems

"The SDR-1000 Blog Spot"
SDR*1000 = www.sdr-1000.blogspot.com
-by- Guy Atkins - Puyallup, WA


* Software Defined Radio (SDR)


for those who are interested in a 'sdr' ~ RHF

"The SDR-1000 Blog Spot" - Mediumwave (AM/MW) and Tropical Bands DXing with the FlexRadio SDR-1000 Radio
 

On Jun 7, 1:04 am, RHF wrote:
On Jun 4, 8:31 am, RHF wrote:





On Jun 4, 1:43 am, bm wrote:

- - Looks like they now have SDR Transceivers too ! ~ RHF

- Old news.
- SDR-1000 is discontinued,
- replaced with Flex-5000A
- at USD 2500.

BM - Yes it may be 'old news' but hey at least it was
"On Topic" -and- for me that's a plus :o) ~ RHF
-

BM - That would be the FlexRadio FLEX-5000A
High Performance Software Defined Radio and Transmitterhttp://www.flex-radio.com/Products.aspx?topic=F5Ka_details

* The FlexRadio FLEX-5000 Radio Featureshttp://www.flex-radio.com/Products.aspx?topic=f5k_features

* Flex-Radio Support Knowledge Basehttp://kb.flex-radio.com/?cNode=4N1V6W&pNodes=2O1N8M

* FLEX-5000 Transceiver Family FAQhttp://kb.flex-radio.com/article.aspx?id=10374

-
- ? WHAT IS : A Software Defined Radio (SDR) ?
- ? What are Software Defined Radios (SDRs) ?
- FlexRadio Systems delivers the only truly 'open source'
- SDR =http://web.flex-radio.com/About.aspx?topic=whatissdr
- Software Defined Radio (SDR) Transceivers for Amateur Radio [Ham]
-
- ABOUT - FlexRadio Systems - The Leader in
- Software Defined Radios (SDRs) for Amateur Radio [Hams]
-http://web.flex-radio.com/default.aspx
-
- * The History of Flex Radio Systems
-http://web.flex-radio.com/About.aspx?topic=history
-
- just trying to be flexable in what i post ~ RHF
- .
- .
- . .
-

READ - Mediumwave (AM/MW) and Tropical Bands DXing
with the SDR-1000 Radio from FlexRadio Systems

"The SDR-1000 Blog Spot"
SDR*1000 =www.sdr-1000.blogspot.com
-by- Guy Atkins - Puyallup, WA

* Software Defined Radio (SDR)

for those who are interested in a 'sdr' ~ RHF
.
.
. .- Hide quoted text -

- Show quoted text -

More-to-Read - Related to the FlexRadio SDR-1000 Radio :

Winradio g313e and Flex-Radio SDR-1000 Compared
http://groups.google.com/group/rec.r...77a96a9ede154e

Flex-Radio SDR-1000 Update
http://groups.google.com/group/rec.r...71f4ec7c68344b

New Blog on TP MW and Tropical Band DXing with the Flex-Radio
SDR-1000
http://groups.google.com/group/rec.r...f90affc99f786b
http://groups.google.com/group/rec.r...da46fc5c5fa13c

Posts about DXing with the Flex-Radio SDR-1000 -by- Guy Atkins
http://groups.google.com/group/rec.r...009fec44d499c8
http://groups.google.com/group/rec.r...635a5a8b6a4a1d
http://groups.google.com/group/rec.r...f90affc99f786b
http://groups.google.com/group/rec.r...50cc7a43dad3b2
http://groups.google.com/group/rec.r...051b9b12c67995

flex it and relax with your radio ~ RHF

RF Caused By SDR-IQ
 

On Jun 2, 3:24 am, Ian Jackson
wrote:
In message .com, RHF
writesOn Jun 1, 7:39 pm, "RF Caused BySDR-IQ"
wrote:
There is a new Yahoo grouphttp://groups.yahoo.com/group/RFICausedBySDRIQ/
which may be of interest to those who own or may purchase anSDR-IQ. The
purpose of the group is to exchange information about RFI caused by the
SDR-IQand how to reduce or eliminate the RFI.

The obvious solution is . . .
not to buy one. ~ RHF
.
.
. .

OK. What's 'SDR-IQ'?
Ian.
--

If anyone needs any information on the SDR-IQ or SDR-14 let me know. I
have both of them running here side by side with an IC-R9000, TS2000
and an IC-R8500. Not sure about what birdies people are talking about.
All of the birdies are in the range of -90 to -100 dBm. My TS-2000
has birdies that show up S9 on the meter. I guess a lot of people are
jumping to the conclusion that because it is simple on the front end,
it has to perform poorly. The analog to digital converters used in
these radios have equivalent IP3s of greater than 45 dBm. Also, there
is not one signal that I cannot hear on the SDR-14 or SDR-IQ that I
can hear on any of my other radios.

Pieter

RF Caused By SDR-IQ
 

On Jun 2, 3:39 am, "RF Caused By SDR-IQ"
wrote:
There is a new Yahoo grouphttp://groups.yahoo.com/group/RFICausedBySDRIQ/
which may be of interest to those who own or may purchase an SDR-IQ. The
purpose of the group is to exchange information about RFI caused by the
SDR-IQ and how to reduce or eliminate the RFI.

The use of ferrites can be a big help to contain the RFI. Check out
W1HIS's break through
work on common mode chokes.
www.yccc.org/Articles/W1HIS/CommonModeChokesW1HIS2006Apr06.pdf
Like most USB accesories, the noise from the PC tends to migrate out
the
cables.

Dallas Lankford found that 6 turns of USB wound on 2 FT-42-83 reduced
the RFI to
acceptable levels. He is planning to add 6 (or more ) FT-240-43 which
should eliminate
RFI.

Dallas didn't mention it. but I suspect similar treatment will be
needed on the antenna
port.

From initial reports, the SDR-IQ is a winner and will become a
classic.

Terry