Spectracom SecureSync 1200 User Manual

Element rate: 10 per second.
Position identifier rate: 1 per second.
Reference marker rate: 1 per 10 seconds.
Element identification: The "on time" reference point for all elements is the pulse leading
edge.
Index marker (Binary 0 or uncoded element): 20 millisecond duration.
Code digit (Binary 1): 50 millisecond duration.
Position identifier: 80 millisecond duration.
Reference marker: 80 millisecond duration, 1 per 10 seconds. The reference marker
appears as two consecutive position identifiers. The second position identifier or ref
erence marker is the on-time point for the succeeding code word.
Figure 5-64: IRIG E time code description
Additional information
The beginning of each 10 second time frame is identified by two consecutive 80 ms elements
(P
0
and P
R
). The leading edge of the second 80 ms element (P
R
) is the "on time" reference point
for the succeeding time code. 1PPS position identifiers P
0
, P
1
… P
9
(80ms duration) occur
0.1s before 1PPS "on time" and refer to the leading edge of the succeeding element.
536 SecureSync User Reference Guide
APPENDIX

Spectracom SecureSync 1200 Specifications

General

Brand	Spectracom
Model	SecureSync 1200
Category	Control Unit
Language	English