More:
Is it possible to measure IP2 of the Orion, and for it
to have some real meaning.....Yes:
The second order IM products occur as f1+and- f2,
> and 2f1 and 2f2. Therefor, one way, legitimate to
> measure, it seems to me, for example would be to
> generate a signal at 7.010 MHz, and read the output
> at 14.02, the data readout frequency the ARRL labs
> chose. Now that could be a legitimate test, but not
> 6 and 8 MHz input which would "mix" to an f1+f2
> result of 14.00MHz, and not 14.02, by the way.
Or, how about a real measurement of IP2 results; how
much IMD is generated on 20 meters because of
two powerful, close signals down on 40 meters?
For example: f1 = 7.006 MHz; f2= 7.014 MHz .
Then the 2nd order product, f1 + f2 from these two
signals is at the ARRL test data readout frequency,
14.020. Now there is a real, and would be interesting,
possible test result, which would have some meaning.
This measurement could be legitimately performed on
an Orion and have real meaning.
73, Jim KH7M
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