Hello Everyone,
It's been about a month since I first posted this topic and I thought
I post an update.
In response to the suggestions I received from my first posting, I've
added a few features, modes... and a couple K of code.
The unit now generates single tones (with a 2nd output in
quadrature!), two tones, triple tones, and bandlimited white noise. All
of these signals can either run continuously or be pulsed at a 50% duty
cycle -- tentatively 10 cycles of the lowest frequency sine wave
component or 10 mS for the noise.
The two tone & three tone signals are summed digitally and are output
via a single channel of the CD player DAC. Is there any application
that would require two individual tones output separately via the R & L
channels?
At the moment I have eight (single, pairs or triples) tone selections
for each mode -- this could be easily increased to 16 with just a small
addition to the tables.
I'm still wondering if there are any specific frequencies or
combinations, beyond those listed in the testing specs in part 2 of the
FCC rules that are "must haves"?
Always grateful for suggestions!
73,
Marv WC6W
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