Basic stereo diversity reception requires two independent and preferably
identical receivers (AGC, filtering, preamp, noise figure, etc..)
connected to two different antennas that are diverse in wavelength
(distance apart) and/or polarity. The two receivers need to be
frequency locked. In this mode you listen to one receiver in one ear
and the other receiver in the other ear and your brain does the signal
process to figure out which one has the best signal to noise ratio.
Frequency locking two seperate (independent) receivers is not a trivial
task. The FLEX-5000+RX2 uses a common DDS for both receivers and they
are identiical in design, so doing diversity with a FLEX-5000+RX2 is as
easy as doing a VFO sync and when you tune RX1, both receivers tune
together; two clicks of the mouse.
For advanced diversity techniques such as synchronous diversity, which
is beam stearing and null forming (using the phase and magnitude of the
2nd RX to either enhance or null signals), the receivers also need to be
phase locked or coherent. To my knowledge the FLEX-5000 + RX2 is the
only ham radio capable of doing this.
Tim Ellison
On 12/2/2012 11:50 PM, Mark Lunday wrote:
Just wondering, since that option (as I learn more about it) sure sounds
like a handy feature for weak signal work on the low bands.
Mark Lunday, WD4ELG
Greensboro, NC FM06be
wd4...@arrl.net
http://wd4elg.blogspot.com
http://wd4elg.net
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