The Windows-based software SpectraLab has a generator function which
allows up to 10 user defined audio tones to be activated, at user
selectable levels.
Output via sound card.
For dynamic intermod testing, two tones can be pulsed by selecting "run"
and "off" with the mouse, spectrum analyser on peak hold to sort out the
DAF.
Two exciters will be needed to test an amp (RF drive needed, not audio
drive), but the principle is the same.
Ian ZS6BTE
Radio WC6W wrote:
> Hi Everyone,
> I've had a breadboard of a digital (PIC microprocessor + a CD player
> DAC) low distortion Two-Tone Generator running for a while and I've
> gotten to the point of finishing it up and putting it in a box.
>
> I was wondering if anyone knows if there is any rationale to adding
> some extra frequencies beyond a couple of (FCC) standard two tone pairs;
> though "feature creeping" this device to the point of adding rotary
> digital encoders & LED readouts, or similar, is not part of the plan!
>
> Oh, and before anyone suggests FSK combinations, please note that
> their are some clock & software constraints that restrict the output
> frequencies to 100 Hz multiples.
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