Mark,
All I can tell you is that the KX2/KX3 and XG3 will respond to input
levels (on the tip) from 3.3 volts up to the maximum RS-232 voltage.
The output (ring) from the XG2 is an FET drain connected to a drain
resistor which connects to +9 volts. I don't know about the KX2 or KX3.
73,
Don W3FPR
On 8/6/2018 11:17 AM, Mark Goldberg wrote:
HI, can you confirm that the KXUSB uses TTL signal levels rather than
standard RS232 levels? I got an extra one with my PX3 and repurposed
it to talk to a GPSDO that requires TTL serial levels and it seems to
work fine. I just put a 3.5mm TRS jack on the GPSDO.
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