Symmetricom ET6000, User Manual

Page: 81 / 206

CHAPTER FOUR
4.34 ENABLE/DISABLE 50/60Hz MEASUREMENT (MODEL ET6500 ONLY)
This command allows the user to enable or disable the 50/60Hz measurement feature.
•
The user inputs $B (HEX 24, HEX 42) followed by either a zero or a one. Zero turns the
option OFF, and one turns the option ON.
•
The unit responds with OK CR/LF.
Example:
$B1
The above example illustrates enabling the 50/60Hz measurement option.
If the unit is not locked, and it isn’t available, the message “NOT LOCK” will be sent.
4.35
50/60Hz SELECTION (MODEL ET6500 ONLY)
This command allows the user to select either the 50Hz or 60Hz measurement features.
•
The user inputs $L (HEX 24, HEX 4C) followed by either a zero or a one. (Zero for 50Hz
measurement, one for 60Hz measurement.) If the unit is not doing measurements, the RS-
232 will respond with OK (CR) (LF), otherwise the unit will respond with ? (CR) (LF).
4.36 ENTER 50/60Hz OFFSET DATA (MODEL ET6500 ONLY)
This command allows the user to enter a starting point for the time error calculation.
•
The user inputs $D (HEX 24, HEX 44) followed by one digit (sign), two digits of seconds, a
decimal point, followed by three digits of milliseconds. The sign digit’s definition is 1 = +
(plus) and
0 = - (minus).
•
The unit responds OK CR/LF.
Example:
$D 023.406
The above example illustrates entering a time error offset of –20.346 seconds.
Note : The time error offset can only be entered if the 50/60Hz measurement
option is OFF.
4-18 ET6xxx ExacTime GPS TC & FG (Rev C) Symmetricom Inc