Re: [Flexradio] Why doesn't MON button work in AM

2011-10-28 Thread W1AEX - Rob 
It would be great if a monitor function for AM was present in the Flex 
hardware but since it's not, many Flex operators who run AM build a 
little RF sampler to monitor the quality of their AM transmissions. The 
one I built is based upon a design from the "East Coast Sound" section 
in the  www.amfone.net  archives. I really like this one because it 
provides enough output to drive standard hi-fi type headphones, it has 
an oscilloscope tap, and the parts cost less than 15 bucks (even less if 
you have a good junk box). I use the Bose Companion II series speakers 
which provides two audio inputs with my Flex. I run a patch cord from 
the RF sampler audio output into the second input of the Bose speakers 
and then plug my headphones into the Bose headphone jack. Once you 
balance the audio level of the Flex receiver with the audio level of the 
little RF sampler you are good to go. When you transmit, the only audio 
you will hear in your headphones will by from the RF sampler, and when 
you receive, all you will hear is the Flex. The link below is to a JPG 
of the simple schematic.


73,

Rob W1AEX

http://www.w1aex.com/756AM/RFsamp.jpg


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Re: [Flexradio] Why doesn't MON button work in AM

2011-10-28 Thread Edwin Marzan 

Hello Guys,
 
I know this is a technical hobby but I was wondering if you could explain it in 
laymans terms. I always wondered about that as I recently began talking on an 
AM net.
 
Thanks! 

Edwin Marzan AB2VW
 

> Date: Fri, 28 Oct 2011 19:54:00 -0400
> From: n...@flex-radio.com
> To: t...@flexradio.com
> CC: flexradio@flex-radio.biz
> Subject: Re: [Flexradio] Why doesn't MON button work in AM
> 
> In the case of FM, you get the fully FM'd carrier but you need to offset in
> case there is no modulation because the AC coupling in the QSE would block
> it so that much is indeed the same.
> 
> Bob
> 
> 
> On Fri, Oct 28, 2011 at 6:21 PM, Tim Ellison, W4TME 
> wrote:
> 
> > And I believe the same is true for FM too.
> >
> > -Tim
> > ---
> > Tim Ellison, W4TME
> > Product Management, Sales & Support
> > FlexRadio Systems^(TM)
> > 4616 W Howard Ln Ste 1-150
> > Austin, TX 78728
> > Phone: 512-535-4713 Ext. 223
> > Email: t...@flexradio.com <mailto:t...@flexradio.com>
> > Web: www.flexradio.com <http://www.flexradio.com>
> >
> > logo
> > /Tune In Excitement^(TM)
> > PowerSDR^(TM) is a trademark of FlexRadio Systems/
> >
> >
> >
> > On 10/28/2011 4:42 PM, Bob McGwier wrote:
> >
> >> In order to get the carrier through the QSE (the exciter), it must be
> >> offset
> >> from zero. This means you would hear a loud heterodyne and offtuned
> >> double
> >> sideband speech. It would not be very pleasant to listen to.
> >>
> >> Bob
> >> N4HY
> >> On Fri, Oct 28, 2011 at 3:46 PM, Rod Brink wrote:
> >>
> >> In AM mode the MON button is greyed out and the monitor function
> >>> disabled.
> >>> I first noticed this when I recorded another station and played it back
> >>> to
> >>> him over the air. I could see it on the panadaptor and the other station
> >>> heard it OK, but all I heard in my speaker was some feedthru squeaks.
> >>> This
> >>> seems to be the case in late versions of PSDR as well as earlier
> >>> versions.
> >>> Am running the Flex 5K and get the same results with both Windows xp and
> >>> W7.
> >>>
> >>> Why is MON disabled in AM?
> >>>
> >>> Rod, KQ6F
> >>> __**_
> >>> FlexRadio Systems Mailing List
> >>> FlexRadio@flex-radio.biz
> >>> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz>
> >>> Archives: 
> >>> http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/>
> >>> Knowledge Base: http://kc.flexradio.com/ Homepage:
> >>> http://www.flexradio.com/
> >>>
> >>>
> >>
> >> __**_
> > FlexRadio Systems Mailing List
> > FlexRadio@flex-radio.biz
> > http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz>
> > Archives: 
> > http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/>
> > Knowledge Base: http://kc.flexradio.com/ Homepage:
> > http://www.flexradio.com/
> >
> 
> 
> 
> -- 
> Flex Radio, Inc. Consultant
> Professor ECE Virginia Tech
> ARS N4HY
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Re: [Flexradio] Why doesn't MON button work in AM

2011-10-28 Thread Bob McGwier 
In the case of FM, you get the fully FM'd carrier but you need to offset in
case there is no modulation because the AC coupling in the QSE would block
it so that much is indeed the same.

Bob


On Fri, Oct 28, 2011 at 6:21 PM, Tim Ellison, W4TME wrote:

> And I believe the same is true for FM too.
>
> -Tim
> ---
> Tim Ellison, W4TME
> Product Management, Sales & Support
> FlexRadio Systems^(TM)
> 4616 W Howard Ln Ste 1-150
> Austin, TX 78728
> Phone: 512-535-4713 Ext. 223
> Email: t...@flexradio.com 
> Web: www.flexradio.com 
>
> logo
> /Tune In Excitement^(TM)
> PowerSDR^(TM) is a trademark of FlexRadio Systems/
>
>
>
> On 10/28/2011 4:42 PM, Bob McGwier wrote:
>
>> In order to get the carrier through the QSE (the exciter), it must be
>> offset
>> from zero.  This means you would hear a loud heterodyne and offtuned
>> double
>> sideband speech.  It would not be very pleasant to listen to.
>>
>> Bob
>> N4HY
>> On Fri, Oct 28, 2011 at 3:46 PM, Rod Brink  wrote:
>>
>>  In AM mode the MON button is greyed out and the monitor function
>>> disabled.
>>>  I first noticed this when I recorded another station and played it back
>>> to
>>> him over the air.  I could see it on the panadaptor and the other station
>>> heard it OK, but all I heard in my speaker was some feedthru squeaks.
>>>  This
>>> seems to be the case in late versions of PSDR as well as earlier
>>> versions.
>>>  Am running the Flex 5K and get the same results with both Windows xp and
>>> W7.
>>>
>>> Why is MON disabled in AM?
>>>
>>> Rod, KQ6F
>>> __**_
>>> FlexRadio Systems Mailing List
>>> FlexRadio@flex-radio.biz
>>> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz
>>> Archives: 
>>> http://www.mail-archive.com/**flexradio%40flex-radio.biz/
>>> Knowledge Base: http://kc.flexradio.com/  Homepage:
>>> http://www.flexradio.com/
>>>
>>>
>>
>>  __**_
> FlexRadio Systems Mailing List
> FlexRadio@flex-radio.biz
> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz
> Archives: 
> http://www.mail-archive.com/**flexradio%40flex-radio.biz/
> Knowledge Base: http://kc.flexradio.com/  Homepage:
> http://www.flexradio.com/
>



-- 
Flex Radio, Inc. Consultant
Professor ECE Virginia Tech
ARS N4HY
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Re: [Flexradio] Why doesn't MON button work in AM

2011-10-28 Thread Tim Ellison, W4TME 

And I believe the same is true for FM too.

-Tim
---
Tim Ellison, W4TME
Product Management, Sales & Support
FlexRadio Systems^(TM)
4616 W Howard Ln Ste 1-150
Austin, TX 78728
Phone: 512-535-4713 Ext. 223
Email: t...@flexradio.com 
Web: www.flexradio.com 

logo
/Tune In Excitement^(TM)
PowerSDR^(TM) is a trademark of FlexRadio Systems/


On 10/28/2011 4:42 PM, Bob McGwier wrote:

In order to get the carrier through the QSE (the exciter), it must be offset
from zero.  This means you would hear a loud heterodyne and offtuned double
sideband speech.  It would not be very pleasant to listen to.

Bob
N4HY
On Fri, Oct 28, 2011 at 3:46 PM, Rod Brink  wrote:


In AM mode the MON button is greyed out and the monitor function disabled.
  I first noticed this when I recorded another station and played it back to
him over the air.  I could see it on the panadaptor and the other station
heard it OK, but all I heard in my speaker was some feedthru squeaks.  This
seems to be the case in late versions of PSDR as well as earlier versions.
  Am running the Flex 5K and get the same results with both Windows xp and
W7.

Why is MON disabled in AM?

Rod, KQ6F
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Re: [Flexradio] Why doesn't MON button work in AM

2011-10-28 Thread Bob McGwier 
In order to get the carrier through the QSE (the exciter), it must be offset
from zero.  This means you would hear a loud heterodyne and offtuned double
sideband speech.  It would not be very pleasant to listen to.

Bob
N4HY
On Fri, Oct 28, 2011 at 3:46 PM, Rod Brink  wrote:

> In AM mode the MON button is greyed out and the monitor function disabled.
>  I first noticed this when I recorded another station and played it back to
> him over the air.  I could see it on the panadaptor and the other station
> heard it OK, but all I heard in my speaker was some feedthru squeaks.  This
> seems to be the case in late versions of PSDR as well as earlier versions.
>  Am running the Flex 5K and get the same results with both Windows xp and
> W7.
>
> Why is MON disabled in AM?
>
> Rod, KQ6F
> ___
> FlexRadio Systems Mailing List
> FlexRadio@flex-radio.biz
> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
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> Knowledge Base: http://kc.flexradio.com/  Homepage:
> http://www.flexradio.com/
>



-- 
Flex Radio, Inc. Consultant
Professor ECE Virginia Tech
ARS N4HY
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[Flexradio] Why doesn't MON button work in AM

2011-10-28 Thread Rod Brink 
In AM mode the MON button is greyed out and the monitor function disabled.  I 
first noticed this when I recorded another station and played it back to him 
over the air.  I could see it on the panadaptor and the other station heard it 
OK, but all I heard in my speaker was some feedthru squeaks.  This seems to be 
the case in late versions of PSDR as well as earlier versions.  Am running the 
Flex 5K and get the same results with both Windows xp and W7.

Why is MON disabled in AM?

Rod, KQ6F
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