Solder jumpers are used to configure rarely changed
functionalities as there are:
Solder jumpers are located on the bottom side of the PCB.
The best soldering is done with 1mm solder. It is easier if the PCB is
cold, so if you failed several times, let the board cool down.
- the interface that you are using towards the PC,
named RXD, TXD and RTS
- the solder jumpers SJ1,
SJ2 and SJ3 located below the FPGA are currently not used
Note 1: Often users
RTS to USB and have RTS handshake enabled (IDP#8=ON) while
Since then the USB is unable to deliver its data, it deactivates RTS
and disables the output of the decoder. For this use case, simply
disable RTS (DIP#8=open) because the Xport does not provide an overload
handling, better than that, I have the impression that the Xport does
not get into overload at all.
Note 2: For
the DIP function control over serial, RxD essentially must be routed to
the interface that your application is using to connect the Mode-S
hardware version requires just two solder jumpers, since the outgoing
data is routed to all three devices at the same time. USB setting is
normally done before shipping.
and use of RTS is strongly recommended for the USB interface. With
Xport, the RTS can either be disabled completly or the signal has to be
re-routed to Xp position as well. Unfortunately the Xport does not have
an overload handling of the RTS equal to the USB device, so it is no
matter how you do.
on the left, RTS in the center and TxData on the right. The picture
shows the full routing of signals for USB, as it is normally done
TX-Data can be routed to all output devices in parallel, so for HW
Version 1.1 this jumper block will be removed anyway. But mind NOTE (2)!NOTE
(2): If you intend to use Lantronix Xport, the
outgoing RxD and TxD are swapped in HW-Version 1.0! That
means that the outgoing TxD signal nees to be routed with a wire to the
pad in the RxD multiplexer, like shown on this picture:
of the Mode-S Beast for output using Serial-over-USB and Lantronix
Xport at the same time.