12
Connections
3.2.2 Connecting to a USB Port
To connect the Mini-Matrix to the USB port of a PC, two USB to RS-232
cables are required. A simple USB to USB connection from the PC to the
Mini-Matrix will not work. This is because both the PC and the Mini-Matrix
are hosts. Using two USB to RS-232 cables will overcome this problem.
Perform the following steps.
1. Connect the first USB to RS-232 cable to the Mini-Matrix before turning
the Mini-Matrix on.
Note:
This is important because the drivers for
the cable are installed during the boot up of the Mini-Matrix.
2. Then connect the null-modem cable to the D-Sub connector of the USB
to RS-232 cable that is connected to the Mini-Matrix.
3. Connect the null-modem cable to the RS-232 D-Sub connector of the
second USB to RS-232 cable. Then plug the USB side of the cable into
the USB port of a PC. Depending on the gender of the D-Sub
connectors, a female to female D-Sub connecter may be needed.
4. To communicate with the Mini-Matrix, follow steps 4 and 5 in Section
3.2.1.