302 TimeProvider 2300/2700 User’s Guide 098-00564-000 Revision A3 – July, 2013
Appendix B Specifications and Factory Defaults
Specifications
Figure B-1. Timing Relationship Between 1PPS and TOD for 1 PPS+TOD Outputs
Timing Relationship between 1PPS
and TOD
Transmission of a TOD message starts 10 ms
(default) after the rising edge of 1PPS signal,
and the transmission is completed within 500
ms, as shown in
Figure B-1. This TOD
message indicates the time of the current 1
PPS rising edge, and is sent at a rate of once
per second.
Rise Time -1PPS Pulse 50 ns
Pulse Width 50 ms
TOD Frame TOD messages use whole 8-bit bytes for
transmission, with check sum protection.
Message type and message ID are used to
clarify messages. Follows Big Endian
convention when a field is longer than one byte,
where bit 0 represents the least significant bit
(LSB), and bit 0 of each byte is transmitted first.
See
Figure B-2.
See
Table B-16 for TOD frame field
descriptions.
TOD Transmission Parameters
Baud Rate: 9600
Parity Check: None
Start Bit: 1 (low level)
Stop Bit: 1 (high level)
Idle Frame: High level
Data Bits: 8
TOD Message Encoding Binary
Table B-15. TimeProvider 2300/2700 1PPS+TOD Output Signal Specifications (Continued)
Parameter Specification
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