CHAPTER 1
MODE
SOURCE OF SYNCHRONIZATION
0
Timecode - IRIGA IRIGB XR3 2137 NASA36 (modulated or DC)
1
Free running - on board VCXO used as reference
2
1 PPS - accepts input one pulse per second
3
RTC - uses battery backed on board real time clock IC
5
GPS (optional) - double wide configuration including GPS receiver
6
GPS (optional) - uses GPS receiver / antenna (receiver in antenna)
INTRODUCTION
1.0 GENERAL
This bc635VME / bc350VX1 Time and Frequency Processor (TFP) Operation and Technical Manual
provides the following information:
Introduction and key feature description
Installation and setup
Detailed operation and programming interfaces
Input and output signals
Programming examples
Drawing set
1.1 KEY FEATURES
The TFP has been designed with the following key features:
Time on demand (days through 0.1 microseconds) with zero latency. T h i s feature is
implemented with hardware registers which latch the current time upon host request
Event logging (days through 0.1 microseconds). This feature is implemented with a second
set of hardware registers. Time is captured on a positive or negative input edge.
Six operational modes are supported. Modes are distinguished by the reference source.
Datum Inc., Bancomm Div.
bc635VME/bc350VX1 Manual
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