Quatech HSU-200 사용자 설명서

Using configuration utilities

Quatech Freedom USB-1/2/300 User’s Manual

Setting advanced options

Notes: Changing

any setting in

the advanced options window
affects all ports on the
Freedom USB adapter.

The Freedom USB port properties can only be altered from the Device

Manager window. Attempting to access these properties from another
software program will generate an error message box that refers you

to the Device Manager.
See Exploring Device Manager screen on page 34 for help in
navigating through the Device Manager screens.

Data Rate Multiplier

The Freedom USB uses an accelerated UART clock frequency to boost

data rates to as high as 460,800 bits per second. This setting

determines the amount of data rate acceleration applied.

Notes: We recommend leaving

the Data Rate Multiplier in
Auto mode unless the

application specifically requires
otherwise.

Auto (default)

Select this radio button to allow the USB serial port device drivers to

automatically adjust the clock as necessary. The software application
can request any desired baud rate up to 460,800 bits per second.

Note: This setting is suitable
for most applications.

Force X1 mode

Select this radio button to limit each serial port to a maximum of

115,200 bits per second. The software application can request any
desired baud rate up to 115,200 bits per second.

Note: This setting will not
enhance most applications.

Force X2 mode

Select this radio button to allow each serial port to run at a maximum

of 230,400 bits per second. The software application can request any
desired baud rate up to 115,200 bits per second. The actual baud rate

will be two (2) times higher than requested.

Note: This setting allows

applications not capable of
asking for higher baud rates to
achieve them.

Force X4 mode

Select this radio button to allow each serial port to run at a maximum

of 460,800 bits per second. The software application can request any
desired baud rate up to 115,200 bits per second. The actual baud rate

will be four (4) times higher than requested.

Note: This setting allows

applications not capable of

asking for higher baud rates to
achieve them.

Connector Signal Selection (DSU/QSU/ESU/HSU-200/300 only)

This setting determines which signals are routed to the AuxIn and

AuxOut pins of the serial port connectors. Regardless of which setting
is chosen, each UART's DTR output is internally looped back to its

own DSR, DCD, and RI inputs.

Page 44

Rev 2.02 (2/24/2004)