Quatech SDS User’s Manual
Configuring the SDS using a Web interface
April 2008
940-0183-155
Page 57
Step
Procedure
Description
¾
Force X4 mode
¾
Force X8 mode
Note: Forcing a change in the data rate may
cause communication problems with some
serial devices. If this is the case, change the
setting back to Auto (Recommended).
Step 3b
Click on the desired Performance
Selector.
Choose balanced mode except in those
cases where the serial device cannot
tolerate the slight delays inherent in
normal TCP/IP operation.
Balanced mode
offers excellent performance
for most applications.
Low Latency
mode heavily favors
responsiveness over throughput.
Step 3c
Set the Heart Beat Time to a value from 1
to 65534 seconds. Default is 45 seconds.
Note: Use a value of 0 to disable the heartbeat
timer.
Heartbeat messages help detect when a
connection has been lost between the PC
driver and the SDS.
If you need quick notification that the
connection has been lost, set this timer to
a shorter value.
If you are more concerned about network
traffic, set this timer to a longer value.
Steps 4a through 4d apply only to RS-232/422/485 (MEI) units
Step 4a
(MEI only)
Configure the serial port interface.
Click on the desired interface selector.
This series of steps only applies to MEI
units, such as the SSE-400.
If you select RS232, the RS422/485
selections will be grayed out. Continue
with
□
Step 5
.
Step 4b
(MEI only)
Click on the desired duplex mode selector.
Select
Full Duplex
to always enable
transmit and receive drivers.
Select
Half Rx
to only enable the
transmit drivers when the SDS is
transmitting; receivers will always be
enabled.
Select
Half Rx Tog
to disable receivers
and enable the transmit drivers only
when the SDS is transmitting.
Step 4c
(MEI only)
Click on the desired connector setup.
Select
Loopback All
to internally loopback
RTS and CTS in the SDS. AuxIn and
AuxOut are looped at the connector.
Select
Modem Control
to send RTS on
the AuxOut signal and to receive CTS on
the AuxIn signal.
Step 4d
(MEI only)
Select 2- or 4-wire communication.
Select
2-wire
to use the transmit pair for
both transmit and receive in RS-422/485.
Select
4-wire
to use a separate pair of wires
for transmit and receive in RS-422/485.
