Quatech RS-485 user manual Clock multiplier jumper options

The factory default is none of these jumpers applied, which allows for software control of the clock multiplier via the Options Register. The Options Register powerup default is for a standard times-1 clock of 1.8432 MHz for compatibility with standard serial ports.

Figure 5 --- Clock multiplier jumper options

SPAD J2 J3

J4

J5

X8

X4

X2

Factory defaults

SPAD J2 J3

J4

J5

X8

X4

X2

X8 mode

SPAD J2 J3

J4

J5

X8

X4

X2

X4 mode

SPAD J2 J3

J4

J5

X8

X4

X2

X2 mode

Quatech DSC-200/300 User's Manual 11