Format Encoding Modulation Carrier Coded Expressions Bit rate
Time Frame
Interval
IRIG-E E121 AM 1kHz BCD
TOY
, CF 10 pps 10 sec
IRIG-E E122 AM 1kHz BCD
TOY
10 pps 10 sec
IRIG-E E123 AM 1kHz BCD
TOY
, SBS 10 pps 10 sec
IRIG-E E124 AM 1kHz BCD
TOY
, BCD
YEAR
, CF
and SBS
10 pps 10 sec
IRIG-E E125 AM 1kHz BCD
TOY
, BCD
YEAR
, and
CF
10 pps 10 sec
IRIG-E E126 AM 1kHz BCD
TOY
, BCD
YEAR
10 pps 10 sec
IRIG-E E127 AM 1kHz BCD
TOY
, BCD
YEAR
, and
SBS
10 pps 10 sec
IRIG-G
IRIG-G G001 DCLS N/A BCD
TOY
, CF 10000
pps
10 msec
IRIG-G G002 DCLS N/A BCD
TOY
10000
pps
10 msec
IRIG-G G005 DCLS N/A BCD
TOY
, BCD
YEAR
, and
CF
10000
pps
10 msec
IRIG-G G006 DCLS N/A BCD
TOY
, BCD
YEAR
10000
pps
10 msec
IRIG-G G141 AM 100 kHz BCD
TOY
, CF 10000
pps
10 msec
IRIG-G G142 AM 100 kHz BCD
TOY
10000
pps
10 msec
IRIG-G G145 AM 100 kHz BCD
TOY
, BCD
YEAR
, and
CF
10000
pps
10 msec
IRIG-G G146 AM 100 kHz BCD
TOY
, BCD
YEAR
10000
pps
10 msec
NASA-
36
N/A AM 1msec UNKNOWN 100 pps 1 sec
NASA-
36
N/A DCLS 10msec UNKNOWN 100 pps 1 sec
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
332 VersaSync User Manual
APPENDIX