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Re: [Discuss-gnuradio] Question about Xrystal leakage problemes
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From: |
John Clark |
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Subject: |
Re: [Discuss-gnuradio] Question about Xrystal leakage problemes |
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Date: |
Thu, 23 Aug 2007 09:33:47 -0700 |
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User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.0; de-AT; rv:1.8.1.6) Gecko/20070802 |
Marcus Leech schrieb:
> 김상원 wrote:
>
>> When I used the TVRX and USRP main board for receiving TV signals, I
>> found that the usrp 64MHz Xrystal leakage is serious.
>>
>>
> I see this with the DBS_RX.
>
> My front end is a dish, with about 45dB of low-noise gain right up at
> the dish. The signals and noise
> coming from the dish (which is separated from the USRP by quite some
> distance) are enough to
> swamp any of the internal spurs of the USRP.
When one is looking at signals down in the -120 range, perhaps with the
help of an LNA on the front,
these 'features' become significant.
John Clark.