Furuno GP-80 - Manual (Page 25)

6. OPTIONAL DGPS
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7) Press ! or " to select First Bit.
8) Press # or $ to select first bit; MSB or LSB.
9) Press " to select Parity.
10) Press # or $ to select parity bit; EVEN, ODD or NONE.
11) Press " to select Stop Bit.
12) Press # or $ to select stop bit; 1 or 2.
13) Press " to select Band Rate.
14) Press # or $ to select band rate; 4800 or 9600.
15) Press the [MENU ESC] key.