to all for using the List to send this message.
73,
Geoff
LX2AO
- Original Message -
From: Edward R. Cole kl...@acsalaska.net
To: Elecraft@mailman.qth.net
Sent: Saturday, March 17, 2012 8:19 PM
Subject: [Elecraft] (OT) Recommendations for Testing
I will be testing some amplifiers, soon
Ed your SDR-IQ will do a nice job of close in 2 tone ID testing, a
better job than my simple spectrum analyser. For IMD testing you do
not need a resistive coupler, an ordinary oscilloscope probe used with
a couple of turns of wire around the output coax outer will provide
sufficent signal for IMD
Ed,
A very important consideration when measuring the IMD performance of an
amplifier (or certainly a receiver), is that the level of any
intermodulation products generated by the test equipment must be low enough
so that they do not introduce measurement error. Among the usual sources
of
I will be testing some amplifiers, soon, and would like advice or
links to info on making IMD and harmonic level tests on HF amplifiers.
I can generate two-tone modulation and monitor spectrum up to 196 KHz
width with my SDR-IQ, but do not have a spectrum analyzer. I have a
scope, power
Ed,
No Spectrum Analyzer? You do have your SDR-IQ that will do that task on
a narrowband segment. For a more detailed analysis take a look at
G4AON's Simple Spectrum Analyzer at http://www.astromag.co.uk/ssa/.
While the mixer should have a +7 dBm LO input, it should be usable with
the XG3
For a more detailed analysis take a look at G4AON's Simple Spectrum
Analyzer at http://www.astromag.co.uk/ssa/. While the mixer should
have a +7 dBm LO input, it should be usable with the XG3 0 dBm output
(or build up an MMIC board with 7 dB gain.)
SDR-IQ with SpectraVue or another SDR
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