Orolia Spectracom VelaSync 1232, User Manual

Page: 236 / 268

Format Encoding Modulation Carrier Coded Expressions Bit rate
Time Frame
Interval
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 Stand-
ard 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. Spec-
tracom used the control function element 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 binary seconds (SBS). The position of the BCD
year information does not conform to the newer IRIG Standard 200-04. IRIG Standard
224 VelaSync 1232 User Manual
APPENDIX