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.…
Why does the mouse cursor randomly jump around when I connect a GPS to a Sealevel serial adapter?
You are describing the “crazy mouse” syndrome, a common condition when Microsoft Windows receives NMEA 0183 data from a serial GPS device. The condition occurs…
How is the memory accessed on the 3514 and the 5104 synchronous serial adapters?
The Zilog 16C32-based 3514 and 5104 have 256 K of memory on the adapters that are used for buffering the input and output data. To…