Not bad. I used a variant of Bruce Macintosh(sp?) rules from the
TML. Signal = sensitivity- range + signature.
Sensitivity is a set characteristic of the sensor though capable
of tuning by engineers (technobabble game mechanic)... And a
skilled/experienced operator can interpret (game mechanic skill
usage)
Similarly signature is a set stat of a ship like Jump
Coefficient, though subject to maintenance and activity as well
as tuning
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from my T989