B&B Electronics DSC-200_300 - Manual - Manual (Page 13)

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
X8
X4
X2
J3
J4
J5
J2 SPAD
Factory defaults
X8
X4
X2
J3
J4
J5
J2 SPAD
X8 mode
X8
X4
X2
J3
J4
J5
J2 SPAD
X4 mode
X8
X4
X2
J3
J4
J5
J2 SPAD
X2 mode
Quatech DSC-200/300 User's Manual 11