bc635-637-PMC

PCI Mezzanine Time & Frequency Processor

Symmetricom’s GPS referenced bc637PCI-U receiver module provides precision time and frequency to the host computer and peripheral data acquisition systems. Time is acquired from either the GPS satellites using a supplied antenna/ receiver (bc637PMC only) or from time code signals, typically IRIG B.

Integration of the bc635/637 PMC module is facilitated with optional drivers for Windows 98/NT/2000/XP, Linux Solaris or VxWorks.

High Speed Time Requests
Central to the operation of the module is a disciplined 10 Mhz oscillator and 100 nanosecond clock. Current time (days to 100 nanoseconds) can be accessed across the PCI bus with zero latency, which allows for very high speed time requests. The oscillator is rate-matched (disciplined) to the input time source and drives the precision 10 MHz frequency output and time code generator circuitry.

Reliable
If time is lost, the module will continue to maintain time (flywheel).

Versatile
Both time code generation and translation are supported. The generator supplies IRIG B time code output that is synchronized to the input time source. The translator reads IRIG A, IRIG B and NASA 36 time codes.

Event Time Capture
An Event Time Capture feature provides a means of latching time for an external event input. The module can also be programmed to generate a periodic pulse rate as well as generate a single interrupt at a predetermined time (Time Compare).