Hi Joseph, I have baught five FE-5680A's from nichgeek. I have taken the
covers off all of them. What I have learned in my dealings with nichgeek is
there seems to be two different kinds of FE-5680A. I have not checked the part
numbers though. One is programable by RS-232 commands and no output on the 9
pin connector. In order to program and get output you have to modify the cover
by adding a slot and a hole and wire up the connectors. The other one is not
programmable and has fixed 10Mhz output. The PCB layouts are totally different
inside. You can tell whih one you have without removing the cover by looking
for the press in stud marks on the bottom plate.
Any questions feel free to email me.
Good Luck
Ken Kubick
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