SingMai Electronics
SB10 User Manual Revision 0.1
Page 6 of 29
Figure 2 SB10 Jumper positions.
The PT4 decoder has two lock modes, and both are supported by the SB10 board. The first is to
use a voltage controlled oscillator. This mode is selected by linking pins 2 and 3 of the header, J10.
To select the DDS clock mode links pins 1 and 2 of J10. For a description of the two modes see the
Technical Description below, sheets 7 and 8.
