>There was some illusion that the goal is to put the IMD 40 dB down
>so it is the minimum detectable distortion to the human ear.
// - illusion - n.
1.a. An erroneous perception of reality. b. An erroneous concept or
2. The condition of being deceived by a false perception or belief.
3. Something, such as a fantastic plan or desire, that causes an
erroneous belief or perception.
- allusion - n.
1. The act of alluding; indirect reference: Without naming names, the
candidate criticized the national leaders by allusion.
2. An instance of indirect reference: an allusion to classical mythology
in a poem. See Usage Note at allude. [Late Latin allusiÅ, allusiÅn-, a
playing with, from Latin allusus, past participle of alludere, to play
with. See ALLUDE.]
Ref.erence; American Heritage Dictionary, 2nd ed.
>That is not the problem.
>The problem is in an RFPA the distortion generates additional
>frequencies that appear outside the passband of the transmitter. In
>this case, we want the IMD to be below the minimum detectable
>level on a receiver.
>I often can find signals 70dB or more out of my noise floor, so that
>means 3rd order IMD of less than that amount is a problem.
// My guess is that a -70db total IMD, SSB transceiver is not possible.
The cleanest, modulated by a human voice transceiver, that I have ever
measured was -38db (a TS-830S).
>... ... ...
- R. L. Measures, 805.386.3734, AG6K, www.vcnet.com/measures.
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