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
Содержание Spectracom VelaSync 1232
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