On Fri,10/30/2015 4:35 AM, Harry White wrote:
What new ANAN radio are you referring to?
http://www.gigaparts.com/Product-Lines/HF-6M-Radios/Apache-Labs-ANAN-10E-SDR.html
How will it improve your measurement capabilities?
I'll use the receiver as a spectrum analyzer. It has greater dynamic
range (big signals to small ones) and frequency resolution (a few Hz)
than anything else currently in my arsenal, and it costs less than $1,000.
What is a VNWA?
A Vector Network Analyzer. It can
1) measure the complex impedance of anything from an antenna to a
complicated network, swept over frequency. "Complex" means it can
separate R and X, and give magnitude and phase.
2) measure the gain through a network (like a bandpass filter), again
both magnitude and phase
3) measure the reflection coefficient of a network, which provides SWR
4) do Time Domain Reflectometry (TDR) to measure the electrical length
of a feedline, and to look for damage to it
5) export data to modeling programs like SimSmith, which can be used to
design matching networks for antennas
VNWA refers to a specific model of VNA designed by a German EE professor
and built by hams in the UK. It's a little box that connects to the USB
port of a Windows computer.
Good questions. Thanks for asking.
73, Jim K9YC
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