I/O PORT DATA INPUT/OUTPUT
4.46 SET MUX OUTPUT
This command allows the user to select the signal output on the four multiplexed channels. The
command consists of the log-on character ($-HEX 24), the primary character (J-HEX 4A) and
the secondary character (S-HEX 53).
• The user enters $JS (HEX 24/HEX 4A/HEX 53) followed by:
aabbccdd
Where:
aa corresponds to 2 digits = Channel 1.
bb corresponds to 2 digits = Channel 2.
cc corresponds to 2 digits = Channel 3.
dd corresponds to 2 digits = Channel 4.
Note: The digits (00-15) are the same as in Table 4-7.
4.47 SET MAJOR TIME – TOD (TIME OF DAY)
This command allows the user to input and change the TOD. This command is only useful when
the unit is in the “Flywheel” mode (See Chapter Three) It consists of the attention/log-on
character, the command character, and nine characters representing days (day-of-year), hours,
minutes, and seconds.
• The user enter $K (HEX 24/HEX 4B) followed by:
DDDHHMMSS
• The unit responds with OK CR/LF.
4.48 SET YEAR
This command allows the user to enter two (2) digits of year into the GPS time. It consists of the
attention/log-on character, the command character, and 2 characters representing year.
• The user enters $< (HEX 24/HEX 3C) followed by two digits.
• The unit responds with OK CR/LF.
Symmetricom Inc ET6xxx ExacTime GPS TC & FG (Rev C) 4-25
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