my circuit draws MICRO Ampers
RS232 MUST put out at least 1.5Miliamps some put out as much a 5 Miliamps
if the radio clicks, its on
anyway... use my HDRadio PCR to test, see if it finds the tuner
can you test this same comport with another device, like xm or at least make a jumper on 2 and 3 and test loopback in a terminal sw
mitch
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Mitch
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