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I initially started using the soft rock with the Power SDR software
but last night downloaded the SDRadio and am hearing a lot more
signals with it. I was able to easily null the image in the Power SDR
setup and when there are a lot of siganls I don't notice anything
except that it sounds real nice.

So, I was wondering if anyone else has done and A/B with the 2 pieces
of software and were able to tell a difference?

Chris N7UJU

Chris,

Wow! What a difference! I haven't made any detailed comparisons yet, but... WOW!

Tnx es vy 73 de KI4DEF Kevin

--------------------------------------------------------------------------------------------------

Date: Tue, 11 Oct 2005 05:58:46 -0000
From: "fargonaz" <fargonaz@...>
Subject: Power SDR going deaf?

I initially started using the soft rock with the Power SDR software
but last night downloaded the SDRadio and am hearing a lot more
signals with it. I was able to easily null the image in the Power SDR
setup and when there are a lot of siganls I don't notice anything
except that it sounds real nice.

So, I was wondering if anyone else has done and A/B with the 2 pieces
of software and were able to tell a difference?

Chris N7UJU





____________

Hmm - can't say I did a detailed A/B comparison, but I did give it a quick try tonight and did not notice much of a difference one way or the other, although band seemed a bit dead this evening. I did have a problem with SDRadio in I was not able to null the image too well on SDRadio -- the phase control had some effect, but the amplitude control did not seem to do anything for me.

It also looks like SDRadio needs reverse IQ set for a SoftRock.

Did you null the image signal on SDRadio on this test? Wondering if hearing more sigs with SDRadio was a result of the image rejection being off?

Regards,

Bill (kd5tfd)

I did try to null in SDRadio but as you found, it didn't have much if
any effect.

I have downloaded the 'spare' data base from Flex so at least when
things get way out of hand I have a normalized point to start over from.

Just a curiosity on my part. I enjoy dinking around with the
software, and love listening to the nice clean audio of the SR. I
really hate turning on the noisy 857, but can only listen so long
before I have to do something about it.

I appreciate your input.

Chris N7UJU

--- In softrock40@..., Bill Tracey <kd5tfd@a...> wrote:

Hmm - can't say I did a detailed A/B comparison, but I did give it a

quick

try tonight and did not notice much of a difference one way or the

other,

although band seemed a bit dead this evening. I did have a problem

with

SDRadio in I was not able to null the image too well on SDRadio -- the
phase control had some effect, but the amplitude control did not

seem to do

anything for me.

It also looks like SDRadio needs reverse IQ set for a SoftRock.

Did you null the image signal on SDRadio on this test? Wondering if
hearing more sigs with SDRadio was a result of the image rejection

being off?

Regards,

Bill (kd5tfd)

At 09:12 AM 10/11/2005, Kevin H. Miller wrote:

Chris,

Wow! What a difference! I haven't made any detailed comparisons yet,
but... WOW!

Tnx es vy 73 de KI4DEF Kevin

--------------------------------------------------------------------------------------------------

Date: Tue, 11 Oct 2005 05:58:46 -0000
From: "fargonaz" <fargonaz@y...>
Subject: Power SDR going deaf?

I initially started using the soft rock with the Power SDR software
but last night downloaded the SDRadio and am hearing a lot more
signals with it. I was able to easily null the image in the Power SDR
setup and when there are a lot of siganls I don't notice anything
except that it sounds real nice.

So, I was wondering if anyone else has done and A/B with the 2 pieces
of software and were able to tell a difference?

Chris N7UJU

Ok, now I'm confused.

We have one that says little/no difference and one big difference like me.

I guess on to hardware then.
Although it acts the same whether I'm using the SBLive 5.1 or the
Delta44, computer is a old 1.6 Athlon running XP.

I'd be curious as to your system specs.

Thanks
Chris N7UJU

--- In softrock40@..., "Kevin H. Miller" <khmiller@c...>
wrote:

Chris,

Wow! What a difference! I haven't made any detailed comparisons

yet, but... WOW!

Tnx es vy 73 de KI4DEF Kevin

--------------------------------------------------------------------------------------------------

Date: Tue, 11 Oct 2005 05:58:46 -0000
From: "fargonaz" <fargonaz@y...>
Subject: Power SDR going deaf?

I initially started using the soft rock with the Power SDR software
but last night downloaded the SDRadio and am hearing a lot more
signals with it. I was able to easily null the image in the Power SDR
setup and when there are a lot of siganls I don't notice anything
except that it sounds real nice.

So, I was wondering if anyone else has done and A/B with the 2 pieces
of software and were able to tell a difference?

Chris N7UJU





____________

DUH!

Sorry I posted anything, I guess still getting used to the software
and what the hardware can actually do.

I didn't realize... until now that the delta44 was providing an extra
48KHz (the duh part) so that's where my 'extra' signals came from,
then realizing the IQ switch needed for SDRadio put the extra signals
down in the extra portion of the band.

Ok, so I'm a little slow.

Thanks for being patient.

Chris N7UJU

--- In softrock40@..., "fargonaz" <fargonaz@y...> wrote:

Ok, now I'm confused.

We have one that says little/no difference and one big difference

like me.

I guess on to hardware then.
Although it acts the same whether I'm using the SBLive 5.1 or the
Delta44, computer is a old 1.6 Athlon running XP.

I'd be curious as to your system specs.

Thanks
Chris N7UJU

--- In softrock40@..., "Kevin H. Miller" <khmiller@c...>
wrote:

Chris,

Wow! What a difference! I haven't made any detailed comparisons

yet, but... WOW!

Tnx es vy 73 de KI4DEF Kevin

--------------------------------------------------------------------------------------------------

Date: Tue, 11 Oct 2005 05:58:46 -0000
From: "fargonaz" <fargonaz@y...>
Subject: Power SDR going deaf?

I initially started using the soft rock with the Power SDR software
but last night downloaded the SDRadio and am hearing a lot more
signals with it. I was able to easily null the image in the Power SDR
setup and when there are a lot of siganls I don't notice anything
except that it sounds real nice.

So, I was wondering if anyone else has done and A/B with the 2 pieces
of software and were able to tell a difference?

Chris N7UJU





____________

fargonaz wrote:

I did try to null in SDRadio but as you found, it didn't have much if
any effect.

First minimize the image response using the phase controls, then slowly move the amplitude slider to refine the rejection. Possibly you will have to retouch the fine phase slider, then again the amplitude.
With a careful adjustment, it is possible to go down up to 70+ dB of
rejection of the unwanted sideband.

Of course, both the phase and the amplitude controls act only on a small
adjustment range, the implication being that the hardware is already almost
balanced, needing just a final touch up. If the hardware is grossly unbalanced,
the range of the amplitude control may be not large enough to rebalance it.

73 Alberto I2PHD

Thanks Alberto,

I was able to find a good signal that allowed me to properly null the
image in SDRadio. Very fine software, I look forward to it's futher
development.


Chris N7UJU
--- In softrock40@..., Alberto I2PHD <i2phd@w...> wrote:

fargonaz wrote:

I did try to null in SDRadio but as you found, it didn't have much if
any effect.

First minimize the image response using the phase controls, then

slowly

move the amplitude slider to refine the rejection. Possibly you will

have

to retouch the fine phase slider, then again the amplitude.
With a careful adjustment, it is possible to go down up to 70+ dB of
rejection of the unwanted sideband.

Of course, both the phase and the amplitude controls act only on a small
adjustment range, the implication being that the hardware is already

almost

balanced, needing just a final touch up. If the hardware is grossly

unbalanced,

the range of the amplitude control may be not large enough to

rebalance it.

73 Alberto I2PHD