EXFO FTB-500 (Window XP) - Manual (Page 420)

IEEE 488.2 and Specific Command Reference
412 FTB-500
Specific Commands

Seconds:
The program data syntax for is
defined as a
DATA> element.
The is rounded to the resolution of
the clock. It ranges from 0 to 60. A value of 60 is
allowed since rounding may cause a number
greater than 59.5 to be rounded to 60. When this
element is rounded to 60 it shall be set to 0 and
the minute value incremented. Any other carries
shall be rippled through the date.
Example(s) SYST:TIME 12,47,29
See Also SYSTem:TIME?
:SYSTem:TIME