For proper enumeration of Sealevel multiport serial adapters, the following components must be included in the Microsoft Windows XP Embedded OS image build: “Class…
What is the extra data transmitted between Sealevel Ethernet Serial Servers and the SeaLINK driver?
The extra data is non-serial Telnet command messages such as COM port settings and modem control signals. SeaLINK devices communicate using the RFC-2217 Telnet…
How do Sealevel synchronous serial adapters handle Manchester clock encoded data?
Manchester clock encoding (also known as split phase or bi-phase level encoding) always produces a transition at the center of the bit cell. Sealevel…
How can I optimize my SeaLINK Ethernet serial server for lower latency?
To optimize a SeaLINK Ethernet serial server for lower latency, disable Nagles algorithm on both the SeaLINK device and virtual COM port driver. SeaLINK…
Why is my Ethernet serial connection timing out or not responding fast enough?
By default, SeaLINK Ethernet serial servers use Nagle’s algorithm to reduce network traffic and increase serial data throughput, with the side effect of increasing…
How can I improve the performance of my USB to serial adapter?
Sealevel USB serial adapters are supported by the SeaCOM driver, which includes a latency timer with a default setting of 16 msec. Decreasing this…
How to fix “crazy mouse” syndrome with USB serial adapters
Overview This condition is potentially encountered in Microsoft Windows when connecting a serial GPS device to a serial port. It is caused when the NMEA…
Can I use my FedEx or UPS account number when I place a web order?
Yes. Please include your account number in the ‘Special Instructions’ field and we will bill the freight charges to your account. The ‘Special Instructions’…
What is the default power up condition of a Sealevel TTL Digital I/O product?
All Sealevel TTL Digital I/O products are configured to power up in input mode by default. This ensures that no outputs are inadvertently activated.…