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Re: [Discuss-gnuradio] CT1FFU converter with RTL-SDR and gqrx
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From: |
Daniel Pocock |
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Subject: |
Re: [Discuss-gnuradio] CT1FFU converter with RTL-SDR and gqrx |
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Date: |
Mon, 18 Apr 2016 23:11:23 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.6.0 |
On 18/04/16 22:32, Ron Economos wrote:
> There's a high pass filter on the output that is designed to pass
> frequencies above 150 MHz. If the LO is only 40 MHz, the high pass
> filter will greatly attenuate the entire HF band.
>
That had occurred to me as well, although I notice they are now offering
a 65.52 MHz LO[1] and their full SDR receiver box does advertise having
a 40 MHz LO, so I presume they have to adjust the high pass filter for
those models. The 40 MHz signal comes through quite strongly and is
detected by the RTL-SDR.
I sent them an email earlier today, I'll see how they respond, maybe it
was just a manufacturing issue.