[Elecraft] Repost: KX3 ACC1 interface - logic signal levels - what is "official" Elecraft standard for this ?

[Don Wilhelm]

Doug,

Yes, by definition a TTL-level input should respond to a high input of 2 
volts or greater while a low level is 0.8 volts or less.
Just as additional information, if an input is CMOS compatible, it will 
respond to a high level of 3.5 volts or more and a low level below 1.5 
volts.

73,
Don W3FPR

On 9/25/2012 1:55 PM, Douglas Faunrt N6TQS +1-510-655-8604 wrote:
> I assume that TTL-level means it works with a +5V/0V swing on input to
> the radio?
>
>