CHAPTER FOUR
• The unit responds with OK CR/LF.
4.20 ENTER POSITION
This command allows the user to manually enter the position of the antenna/preamp.
The command consists of :
Two digits of degrees latitude.
Two digits of minutes latitude.
Three digits of sub-minutes latitude.
N (North) or S (South).
Three digits of degrees longitude.
Two digits of minutes longitude.
Three digits of sub-minutes longitude.
E (East) or W (West).
+ (plus) or - (minus).
Four digits of altitude in meters.
•
• The user inputs $ } (HEX 24/HEX 7D) 3348824N11753397W+0026
• The unit responds with OK CR/LF.
The above example is entering Symmetricom’s position of:
Latitude 33
o
48.824 N.
Longitude 117
o
53.397 W.
Altitude + 0026 meters.
4.21 ENTER DAC VALUE
This command allows the user to manually enter a DAC (Digital to Analog Converter) value that
is used to adjust the internal time base. This would typically be done prior to the front panel
LOCKED LED turning on, if disciplining was turned off, or to null/calibrate the internal
oscillator.
The DAC value consists of five digits from 00000 to 65535. If a number is entered that is
greater than 65535, it will automatically be converted to 65535.
• The user inputs $ ~ (HEX 24/HEX 7E) 32767.
• The unit responds with OK CR/LF.
4-12 ET6xxx ExacTime GPS TC & FG (Rev C) Symmetricom Inc
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