Sundance SMT399-F - Manual (Page 6)

4.2 Module Options
Although the module is fully assembled, there are several surface mount selector
pads that are user adjustable.
The selector pads are labelled S1 thru S9, and consist of 3 pads in an ‘L’ shape. The
pad spacing allows for surface mount 0805 packaged devices to be fitted; typically
zero-Ohm resistors.
The following table details all of the selector pad functions;
Selector Position Function
S1 1 Enable VGA. Leaves OCXO powered down.
2 Enable OCXO. Leaves VGA powered down.
S2 1 Enable J1 output, MMBX.
2 Enable J2 output, MMCX.
S3 1 Enable J3 output, MMBX.
2 Enable J4 output, MMCX.
S4 1 VFTCR thru-hole OCXO. Factory fitted, do not alter.
2 VFTCS surface mount OCXO. Factory fitted, do not alter.
S5 1 Enable OCXO. Can fit capacitor for AC coupling.
2 Enable VGA.
S6 1 Enable J5 output, MMBX.
2 Enable J6 output, MMCX.
S7 1 Enable J7 output, MMBX.
2 Enable J8 output, MMCX.
S8 1 Enable J9 clock input, MMCX.
2 Enable J10 clock input, MMBX.
S9 1 Routes VGA output to J11, SMA. Used for output LC filter
adjustment.
2 Normal operation.
SMT399-F Clock Distribution Module User Manual Page 6 of 11