Spectracom PRISMA VelaSync User Manual page 220

APPENDIX
Format
IRIG-E
IRIG-E
IRIG-E
IRIG-E
IRIG-G
IRIG-G
IRIG-G
IRIG-G
IRIG-G
IRIG-G
IRIG-G
IRIG-G
NASA-
36
NASA-
36
The Spectracom IRIG formats use the control functions for BCD year information and a Time
Sync Status bit and in format E the control functions are used for straight binary seconds (SBS).
Refer to individual IRIG Time Code description figures and text. IRIG Standard 200-98 format B
had 27 control bits and format E had 45 bits for control functions. These control bits could be
used for any use and there was no defined function. Spectracom used the control function ele-
ment at index count 55 as the TIME SYNC STATUS and the sub-frame after position identifiers
P6 and P7 as the year info and for format E the sub-frame after P8 and P9 for the straight bin-
ary seconds (SBS). The position of the BCD year information does not conform to the newer
208
Encoding Modulation Carrier
E124 AM 1kHz
E125 AM 1kHz
E126 AM 1kHz
E127 AM 1kHz
G001 DCLS N/A
G002 DCLS N/A
G005 DCLS N/A
G006 DCLS N/A
G141 AM 100
kHz
G142 AM 100
kHz
G145 AM 100
kHz
G146 AM 100
kHz
N/A AM 1msec
N/A DCLS 10 msec UNKNOWN
Coded Expressions
BCD , BCD , CF and
TOY YEAR
SBS
BCD , BCD , and CF
TOY YEAR
BCD , BCD
TOY YEAR
BCD , BCD , and SBS 10 pps
TOY YEAR
IRIG-G
BCD , CF
TOY
BCD
TOY
BCD , BCD , and CF
TOY YEAR
BCD , BCD
TOY YEAR
BCD , CF
TOY
BCD
TOY
BCD , BCD , and CF
TOY YEAR
BCD , BCD
TOY YEAR
UNKNOWN
Time Frame Inter-
Bit rate
val
10 pps 10 sec
10 pps 10 sec
10 pps 10 sec
10 sec
10000 10 msec
pps
10000 10 msec
pps
10000 10 msec
pps
10000 10 msec
pps
10000 10 msec
pps
10000 10 msec
pps
10000 10 msec
pps
10000 10 msec
pps
100 pps 1 sec
100 pps 1 sec
VelaSync User's Manual