Appendix; Two-Input Configuration; Note On J3 And J4 Jumpers - powersoft DSP-Lite User Manual

Appendix

A. Two-input configuration
The DSP-Lite processing board can support two
hardware configurations, with 1 input or 2 input connectors.
The former layout is the factory default hardware
configuration. The layout with 2 input connectors suites
stereo signal input and can be achieved with few modification
of the surface mounted components.
In order to complete the
hardware customization, a 3
pole XLR female receptacle for
vertical PCB mount must be
available. Powersoft suggests
to adopt the Neutrik NCJ6FA-V
XLR/jack hybrid chassis
connector, combining 3 pole
XLR receptacle and 1/4" jack.
1. Remove the pass through XLR-M connector (Neutrik
NC3MAV-0).
2. Remove the two LINK resistors R53 and R7, that route
the signal from the input connector to the through con-
nector.
3. Remove the swap resistors R147 and R148.
remove
22 | DSP-Lite
4. According to following picture, properly short to the
highlighted contacts. Take care to clean the solders.
5. Mount and solder the XLR-F connector.
remove
A.1. Note on J3 and J4 jumpers
J3 and J4 jumper on the rear surface of the DSP-Lite
remove
PCB are directly connected to the front R7 and R53 resis-
tors respectively.
J3 and J4 link the input connector pins 2 and 3 to the
pass through connector pins 2 and 3 respectively. Even if J3
and J4 appear opened, by default they are closed through
the resistors R7 and R53 in the component side of the PCB.
remove
short
FIG. 8: DSP-Lite with two input connectors.
A
short