i am going to be messing around with the garmin gps18-lvs for use with ntpd.

i wish to modify the wiring instructions given here:

http://time.qnan.org/


i will eliminate the circuit board and leds instead opting for an inline fuse 
holder and wiring the gps/serial/usb together in properly strain-relieved 
inline wiring. 

now we get to my question. 

if i use an additional wire to extend the pulse, ground and power for no more 
than 3ft in length, to power the 2 leds in their own box that can be attached 
to the front of the computer to make the leds more easily visible, would this 
extra length of wire create any kind of stub that would change the leading 
edge pulse slew rate enough to cause it to become less accurate? or need i 
only concern myself with such a thing in much higher frequencies?

also, while i am asking dumb questions, do you think adding rj45 sockets 
inline to allow using a standard ethernet cable to lengthen the wire from the 
gps18 to the usb/serial junction would cause any problems? i would not 
consider extensions of more than 6-9 feet.

-- 

Chuck


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