Transverter & Pure Signal

[Ed Grafton]

I am planning on using a couple of transverters with the HL-2 to get 6&2 meters. Can Pure Signal still be used through the transverter?

My brain tells me it will not work, but in many ways I am still learning.

Thank you,

Ed

["Christoph v. Wüllen"]

It works in principle, but possibly not in practise. This is so
because quite a bit of non-linearity is imposed on the
feedback signal from the antenna to the ADC inside the HL2,
and also the delays may be a little high.

But it is worth to try, the first test is whether PS reports
that it is correctiong, the second test looks at the feedback
signal as it appears on the HL2, this should improve quite
a bit, and the third test needs a SpecAnalyzer to tell
you whether this is actually true at the antenna.

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[Ed Grafton]

Thank you very much. You have given me hope.

Ed

[Clifford Heath]

PureSignal will be trying to correct the output of the down-converter. It can't see what's happening at the antenna. So anything symmetrical between the up- and down-converters could cancel out, looking clean to PS but bad at the antenna. Which is what Christopher said, in different words.

Clifford Heath 

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[Denis Brunet]

The pure signal work 100 % you can check to one sdr over the worl and you can see your signal with pure signal it's very clean. 2 modul after amplifier it's necessary for correction after the amplifier. I personally test work 100% 73" HS0ZMY/HB9TWK Denis 

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[Ed Marciniak]

In principle, you’d need to use the transverter setup screen and the band select buttons rather than just selecting 10m band and ignoring the frequency offset, since your calibration would be different per RF signal chain.

In reality, you’d need an RF sampler to deliver an appropriate signal level for each band (depending on you hardware layout, it’s entirely possible to use one sampler and switch attenuation in the signal path to get levels correct). The other problem is that transverters are usually half duplex. You’d need a sample of the LO driving a second mixer and image filter. You’d also need enough isolation between the two paths, and also minimizing distortion of the sampled signal. In some respects it would be simpler if the up and down converter had different LO frequencies and that might not be as bad as it sounds if it turns out the phase noise isn’t real critical. I suspect being your not going to encounter nearby out of hand signals at the sampler that create concerns for reciprocal mixing. It *might* be easier to use a cheap switchable synthesized LO board, an a mixer.

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