
User manual
EXPERT 2K-FA
Pag. 64 of 64 Issue 2 – May 2011
Note
: it could happen that, trying to connect the linear amplifier to the PC, some problems could
arise because other peripherals sharing the same USB internal hub conflicts to it.
To avoid this kind of conflict it is necessary to go to selective addressing.
Selective addressing thru USB port.
This options has been designed to allow a selective addressing of an EXPERT linear
amplifier connected to any given PC USB port.
Differently from other similar devices using the popular FT232RL USB microcontroller,
where the most used way for providing selective addressing of a specific device is
based upon its serial port ID parameter (e.g. COM1, COM2, etc.), or method is based
upon a unique feature of the popular FTDI chip which is known as “ID String Property”.
This is a sequence of 8-alphanumeric characters, programmed by the FT232RL’s
manufacturer during the production process, which something similar to the MAC
address peculiar to any PC LAN card.
From here the consideration that this unique coding parameter doesn’t allow addressing
ambiguity when correctly applied to FDTI chips connected to the same USB bus.
Preliminary programming for “ID string property” within Term_2K_USB.exe .
This special setting, based upon an easy “self-learning” procedure, must be performed
once and with the
EXPERT 2K-FA
having previously put
OFF-LINE
.
Select
File/Configure USB connection...
from the main menu as shown in the picture
below: