OPTION DESCRIPTIONS
The 60Hz measurement data is also available on the 50/60Hz measurement screen of the front
panel LCD display. The format is as follows:
FRQ: 60.1324HZ PHASE: 180.2
o
ERROR: +1.357
1>OFFSET:+1.206S<4>OFF<5>ON<6>60HZ/ ON
If the 50/60Hz option is not enabled, ON will be replaced by OFF. When the unit is first turned
on, it will come up in the OFF (default) mode. If the 50/60Hz option is turned on prior to the
unit achieving LOCK, ON will be replaced by ERR and measurement data will not be available.
When measuring the 60Hz with a time period of 16.66 milliseconds, if a measurement occurs
outside a one millisecond window of that time period (such as a noise spike), the measurement is
ignored, and an error is counted. If 1,000 successive errors are read, the message ERR appears,
and the 60Hz measurement option is turned OFF.
Symmetricom Inc ET6xxx ExacTime GPS TC & FG (Rev C) C-27
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