Spectracom SecureSync User Manual

C.F. Element # Digit # Function
63 13 Years Units Y8
64 14 Space
65 15 Years Tens Y10
66 16 Years Tens Y20
67 17 Years Tens Y40
68 18 Years Tens Y80
69 PID P7 Position Identifier
70 19 Space
71 20 Space
72 21 Space
73 22 Space
74 23 Space
75 24 Space
76 25 Space
77 26 Space
78 27 Space
5.5.3.1 FAA IRIG B Code Description
SecureSync can be configured to provide IRIG timing, reflecting UTC or local time, with or
without daylight saving time corrections. Below is a detailed description of the FAA modified
IRIG B code. The FAA modified the IRIG B code by including satellite lock status and time error
flags in the Control Function Field. The error flags provide an inaccuracy estimate based on the
time elapsed since loss of GPS lock. In addition, the Straight Binary Seconds (SBS) data was
removed from the data stream. The SBS time is the number of seconds elapsed since midnight.
FAA IRIG B OUTPUT
The FAA IRIG B code contains the Binary Coded Decimal (BCD) time of year and a Control
Function (CF) field containing satellite lock status and time error flags. With the exception of the
position identifiers, all remaining code elements are set to a binary 0. Figure A-1 illustrates the
FAA IRIG B data structure. The BCD time of year provides the day of the year, 001-366, and
the time of day including seconds. The hour of the day is expressed in 24-hour format.
SecureSync User Reference Guide 551
APPENDIX

Spectracom SecureSync Specifications

General

Model	SecureSync
Time Reference	GPS, GLONASS, BeiDou, Galileo, IRIG, NTP, PTP, 1PPS
Disciplines	GNSS, IRIG, PTP, NTP, SyncE
Inputs	GPS, GLONASS, BeiDou, Galileo, IRIG, NTP, PTP, 1PPS
Outputs	NTP, PTP, 1PPS, IRIG
Protocols	PTP, NTP, SNMP, SSH, HTTPS
Form Factor	1U Rack-mount
Redundancy	Optional redundant power supply
Security Features	Password protection, access control lists, SSH, HTTPS, SNMPv3, NTP authentication, PTP authentication
Power Supply	100-240 VAC, 50-60 Hz
Operating Temperature	0°C to +50°C
Dimensions	44.45 mm (H) x 482.6 mm (W)