Spectracom TPRO-cPCI, User Manual, Page: 33 / 46

TPRO-cPCI/TSAT-cPCI Spectracom Corporation
Synchronizable Timecode Generator User Manual 5-3
5.3 Set Year
0 x 0015
Time codes (IRIG-A, IRIG-B and NASA36) do not convey the year. Use this command to set
the year. This is the same as setting the year using the 0x0010 command, except that this
command does not change the Julian day or time. The year can be specified regardless of
whether the board is in sync or not, and the year is retained if the board loses/acquires sync.
The valid range is 1990–2999. Values outside this range will result in the year being set to
0001.
Bits tbreg_cmd[0] Bits tbreg_cmd[1]
31:00 (unused) 31:00 (unused)
Bits tbreg_cmd[2] Bits tbreg_cmd[3]
31:16 (unused) 31:16 (unused)
15:12 1000s of Year 15:00 0x0015
11:08 100s of Year
07:04 10s of Year
03:00 1s of Year
For example, to set the year to 2003, write the following commands:
tbreg_cmd[2] = 0x00002003
tbreg_cmd[3] = 0x00000015
The response indicates that the year has been set, or indicates year 0001 if an invalid year was
commanded. The response is:
Bits tbreg_response[0] Bits tbreg_response[1]
31:00 (unused) 31:00 (unused)
Bits tbreg_response[2] Bits tbreg_response[3]
31:16 (unused) 31:16 (unused)
15:12 1000s of Year 15:00 0x0015
11:08 100s of Year
07:04 10s of Year
03:00 1s of Year