[hpsdr] Hermes/PowerSDR High or Low side injection for transverters

[N4IS]

Conrad

Did you try to set Region > Extended ?

I did some tests with  Hermes and I did work,

Regards
Jose Carlos
N4IS

On 2/20/2013 6:17 AM, Conrad Farlow wrote:
>
> Does PowerSDR allow the use of either high side or low side injection 
> automatically, i.e does it invert the side bands accordingly. I am 
> thinking of using high side injection for convenience on some bands.

It doesn't look like it does.

Using PSDR v2.2.8 for OpenHPSDR; the form accepts the transverter LO being
above the desired band, but no tx or rx. For example, with the LO set as
usual, eg. 410MHz for an output of 435MHz, the rig operates at 25MHz as
expected, but not with LO = 460MHz.


With PSDR v2.5.3 and the Flex1500 the same test does operate with a
high-side LO, but all it does is calculate the offset from the LO and Begin
Freq. Then it has standard +ve tuning and no sideband inversion, so that
doesn't seem like what you want.

There used to be a way of operating the inverting satellites with the
F5000 V/U, but I never used it so I can't say whether it did true inversion
or not.

I used to have a couple of the higher microwave transverters that were
inverting, so I see the problem. That was just because of where the bricks
came out. Now with the bigger choice of IFs available with SDR I have always
been able to find a scheme that gets the passband the right way round.

GL & 73,  Alf  NU8I
Phoenix  AZ  DM33xo

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