XG3_Signal_Source

[K5DNL]

Elecraft,

I would like to request a change in the firmware that would allow me
to Edit the frequency of the 160M band to 475 khz.
( 1500 KHZ is as low as it will go at this time ).
This would make a nice signal source for transverter design
on the 630 meter band.

Thanks for all the nice equipment.
73 Ken K5DNL
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[Dick Dickinson]

If so, is there any reason not to go to 450 khz to cover 455 khz i.f.
frequency?  Pardon me if that does not compute.

 

Dick - KA5KKT

  _____  

Elecraft,

 

I would like to request a change in the firmware that would allow me

to Edit the frequency of the 160M band to 475 khz.

( 1500 KHZ is as low as it will go at this time ).

This would make a nice signal source for transverter design

on the 630 meter band.

 

Thanks for all the nice equipment.

73 Ken K5DNL

 

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[K5DNL]

Dick,

Yes , I agree , 450 khz is a better number.

73 Ken K5DNL
=================================

--- On Mon, 5/27/13, Edward Dickinson III <[hidden email]> wrote:

From: Edward Dickinson III <[hidden email]>
Subject: Re: [Elecraft] XG3_Signal_Source
To: [hidden email]
Date: Monday, May 27, 2013, 3:14 PM

If so, is there any reason not to go to 450 khz to cover 455 khz i.f.
frequency?  Pardon me if that does not compute.

 

Dick - KA5KKT

  _____ 

Elecraft,

 

I would like to request a change in the firmware that would allow me

to Edit the frequency of the 160M band to 475 khz.

( 1500 KHZ is as low as it will go at this time ).

This would make a nice signal source for transverter design

on the 630 meter band.

 

Thanks for all the nice equipment.

73 Ken K5DNL

 

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[Bruce Beford-2]

I don't think the CS2100 fractional-n synthesizer used in the XG3 will allow
operation as low as you are asking. Perhaps Bob (the designer) will chime in
on this. OTOH, you could always build your own divider, and use the XG3 at a
freq that it can produce now. If you are designing transverters for 630M,
this should be a trivial task.

GL,
Bruce
N1RX

> I would like to request a change in the firmware that would allow me
> to Edit the frequency of the 160M band to 475 khz.


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[David Pratt]

Would it be possible to AM modulate it with a tone of, say, 400 Hz too ?
;-)

73 de David G4DMP

In a recent message, Ken Roberson <[hidden email]> writes
>Dick,
>
>Yes , I agree , 450 khz is a better number.
>
>73 Ken K5DNL

--
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +

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[Eugene Balinski]

If that is the case, any chance we can get it down to 50
kHz ?  Some of the old Hammarlund gear need 60 kHz as well
as some of the more common IF frequencies

Gene - K1NR


On Mon, 27 May 2013 16:14:31 -0400
 "Edward Dickinson III" <[hidden email]> wrote:

> If so, is there any reason not to go to 450 khz to cover
> 455 khz i.f.
> frequency?  Pardon me if that does not compute.
>
>  
>
> Dick - KA5KKT
>
>   _____  
>
> Elecraft,
>
>  
>
> I would like to request a change in the firmware that
> would allow me
>
> to Edit the frequency of the 160M band to 475 khz.
>
> ( 1500 KHZ is as low as it will go at this time ).
>
> This would make a nice signal source for transverter
> design
>
> on the 630 meter band.
>
>  
>
> Thanks for all the nice equipment.
>
> 73 Ken K5DNL
>
>  
>
>

______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list:
> http://www.qsl.net/donate.html

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[Paul Saffren N6HZ]

Ken,

As the firmware engineer on the XG3 I can tell you that 1.5 MHz is as low as we can go on the CS2100CP "synthesizer" chip using the 10 MHz internal reference oscillator.  I suppose one thing you could try is to remove the 10 MHz crystal and replace it with a 1 MHz one.  That might get you down there but you would sacrifice the upper frequencies in doing so.  I haven't tried it personally, so I cannot guarantee the outcome.

Regarding modulation, I looked into that a while ago and found that the PLL lock time of the CS2100CP is too long to allow for any type of modulation.  

73,

Paul

[David Pratt]

Thanks for that, Paul; I had wondered for some time whether a firmware
upgrade would have been possible to allow tone modulation. Nevertheless,
the XG3 is a fine piece of kit. Your contribution to its development is
much appreciated.

73 de David G4DMP


In a recent message, Paul Saffren N6HZ <[hidden email]> writes
>
>Regarding modulation, I looked into that a while ago and found that the PLL
>lock time of the CS2100CP is too long to allow for any type of modulation.

--
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +

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