Spectracom TSync-PCIe, User Manual

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Theory of Operation
The TSync-PCIe board's architecture essentially consists of input ref
erences, which are used as sources of 1PPS synchronization and/or
time-of-day (TOD) and date information, and for disciplining an
internal oscillator. The TSync-PCIe takes the synchronous clock, a
1PPS and time-of-day (TOD) and date to create output references
that act as time references for other devices. Other interfaces for
time stamping external events, creating precisely timed external sig
nals, debug, upgrade, and access from a host computer are
provided.
This Chapter includes the following topics:
6.1 Input References 28
6.1.1 GNSS Receivers as Input References 28
6.1.2 IRIG Inputs 28
6.1.3 External 1PPS Reference 30
6.1.4 Built-in References 30
6.2 Input Reference Monitor 30
6.3 Clock Subsystem 31
6.4 Output References 32
6.4.1 IRIG Output 32
6.4.2 10-MHz Sine Wave Output 33
6.4.3 1PPS Output 33
6.5 General Purpose Input/Output 34
6.5.1 Programmable Inputs 34
6.5.2 Programmable Outputs 34
6.6 System Status 34
6.7 LEDs 35
6.8 Upgrade 35
6.9 Interrupts 35
6.9.1 Interrupt Descriptions 35
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