The Cyclic Redundancy Check (CRC) is a check value used to detect transmission errors in a frame or block of data. The transmitter encodes…
Is synchronous mode the only mode that can use a BERT pattern?
Section 2.5 of the ITU O.151 document basically states that a pattern can be encapsulated by the framing bits of a protocol, if necessary.…
How will my Sealevel synchronous serial adapter appear in Windows Device Manager?
In Windows Device Manager, Sealevel synchronous serial adapters will install under the “SeaMAC Device” category. The device names for Sealevel synchronous serial adapters, with part…
Why does my Sealevel synchronous adapter not show up as a COM port?
Sealevel synchronous serial adapters enumerate as SeaMAC devices in Windows. Since the devices are zero-indexed, the first installed port will be “SeaMAC0”. SeaMAC devices support…
Why don’t standard asynchronous serial adapters support 9-bit protocols?
Applications that require 9-bit protocols are rare so the chips that support them are more expensive than standard 8-bit UARTs. Most 8-bit UARTs can…
What Sealevel asynchronous serial adapters support 9-bit protocols?
Any Sealevel asynchronous serial adapter that includes a 16C950 UART or 16C954 quad-port UART natively supports 9-bit framing in hardware. USB serial adapters use…
How do I perform a loopback test with my serial adapter configured for 2-wire RS-485?
2-wire RS-485 connects the transmitter and receiver to the same data channel. Many applications are not designed to receive the same data they are transmitting…
How do I change the COM port assignment for my asynchronous serial adapter?
Sealevel recommends using the installed COM numbers if at all possible to avoid system conflicts. If you previously installed a USB or PCMCIA serial interface,…
How to change asynchronous serial COM Port assignments in Sealevel’s Port Manager or Advanced Ports Utilities
Sealevel recommends using the installed COM numbers if at all possible to avoid system conflicts. If you previously installed a USB or PCMCIA serial interface,…