Hi,
I guess I should respond, as I'm responsible for the blog posting that you
linked.
I tested the relative phase stability using amplified noise that was fed
via a splitter onto the two dongles. I cross-correlated the noise and found
that there was a deterministic frequency difference between
I have a question concerning connecting two DVB-T dongles on the same clock
source for interferometric (or passive radar) measurements, as described at
http://kaira.sgo.fi/2013/09/16-dual-channel-coherent-digital.html
I have assembled the same system with one dongle used as oscillator on a 28.8
Thanks for your reply. Indeed designing phase coherent receivers is my daily
job activity (partly), but the fun of hacking DVB-T receivers is to find ways
of using
these for applications they were never intended for. I have indeed read your
posts
concerning the difficulties in reproducing
This is largely because this $10.00-apiece hardware was never designed
for this class of application. When you're doings things that require
phase-coherence, you have to design your radios to support it.
There are at least two PLLs involved here--one on the R820T chip, and
another, as far as
