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From: | Marcus D. Leech |
Subject: | Re: [Discuss-gnuradio] dual coherent channel rtl_sdr |
Date: | Tue, 24 Sep 2013 14:41:42 -0400 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16 |
On 09/23/2013 10:59 AM, Juha Vierinen wrote:
So, what were your test conditions? I'm feeding a +3.3dBm signal from a high-precision communications test set at 28.8Mhz to two of those dongles. Then I'm feeding in a 45Mhz sine wave into the two devices RF input through a splitter and variable attenuator. The result is horrible relative-phase-noise between the two channels. They dance all over the place on the scope display. In comparision, a B100 with TVRX2, under the same conditions, works flawlessly, with no appreciable relative phase jitter between the two channels. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org |
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