[hpsdr] PowerSDR Transverter Setup Query

[Justin Giles-Clark]

Greetings All,

     For anyone using the WSJT weak signals mode - I have since found 
that in the WSJT 1.7.0-Devel version there is also a transverter/offset 
configuration that can be used the same as the XVTR configuration in 
PowerSDR.

It accepts offsets and realises it is a negative offset and therefore I 
can configure for the 160m IF required for the 630m Transverter.

The setting can be found in File/Settings/Frequencies Tab/Station 
Information.

For future reference.

73, Justin, VK7TW

On 27-Sep-16 7:43 AM, hpsdr-request at lists.openhpsdr.org wrote:
Today's Topics:
>     1. Re: PowerSDR Transverter Setup Query (Justin Giles-Clark)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 26 Sep 2016 08:15:34 +1000
> From: Justin Giles-Clark <justingc at ozemail.com.au>
> To: Helmut <dc6ny at gmx.de>
> Cc: hpsdr at lists.openhpsdr.org
> Subject: Re: [hpsdr] PowerSDR Transverter Setup Query
> Message-ID: <24E1698E-0249-408F-933F-96E431A01107 at ozemail.com.au>
> Content-Type: text/plain;	charset=utf-8
>
> Thanks Helmet,
>
> What I suspected.
>
> I already use the HPSDR natively on 630m.
>
> I have been asked to review a transverter and wondered if I could set it up under the XVTR in powersdr.
>
> I will revert to the FT847.
>
> Thanks for the response.
>
> 73, Justin, VK7TW
>
>
>> On 26 Sep 2016, at 00:14, Helmut <dc6ny at gmx.de> wrote:
>>
>> Hi Justin,
>>
>> As far I know PowerSDR-XVTRs can only handle RX-DOWN-mixing, which generates
>> positive intermediate frequencies inside the 1. Nyquist zone. In your case
>> RX-UP-conversion is applied by using a real (positive) 1,33 MHz. Negative LO
>> would formally lead to negative IF.
>> But if you're interested in 630m, why you don't use the Hermes for this band
>> directly without any detours? Hermes offers excellent performance on this
>> band too.
>>
>> 73, Helmut, DC6NY
>>
>> -----Urspr?ngliche Nachricht-----
>> Von: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Justin
>> Giles-Clark
>> Gesendet: Sonntag, 25. September 2016 14:23
>> An: hpsdr at lists.openhpsdr.org
>> Betreff: [hpsdr] PowerSDR Transverter Setup Query
>>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Greetings All,
>>
>>      I am using PowerSDR V3.3.9 controlling a Hermes board and have a
>> 630m transverter that mixes down to 1.802-1.809 to cover 472-479kHz
>> (-1.33MHz offset).
>>
>> In the XVTR setup screen I have setup the LO Offset to -1.3MHz and LO
>> Error to -30.000kHz for a Begin Freq of 0.472000MHz and End Freq of
>> 0.479000MHz.
>>
>> The transverter is designed for rigs that don't have the 630m band
>> available but have 160m band.
>>
>> My question is does the XVTR Setup allow for negative offsets? This is
>> the reverse to normal transverters that mix up and have positive offsets.
>>
>> I have tested and it doesn't appear to work.
>>
>> Any thoughts?
>>
>> 73, Justin, VK7TW
>>
>>
>>