GPS7 GPS Synchronization and Timecode module
To calibrate th
e internal frequency. Perform the following procedure to set the
internal frequency of the mainframe internal oscillator. This adjustment stores the
current frequency of the oscillator while it is locked to a GPS and/or GLONASS
signal. It is stored for used when the instrument i s set to Internal mode. This
procedure can be done without any disruption to operation and is best performed
in the operating environment of the instrument.
1. Connect the power cord to the TG8000 mainframe.
2. Check for error messages as the instrument starts.
3. Connect a GPS and/or GLONASS signal to the rear of the module.
4. Allow the instrument to warm up for a minimum of 20 m inutes.
5. Press the
MODULE button until GPS7 : STATUS appears.
6. Check that the signal status shows Locked.
7. Check that signal lock indicator displays Fine:
a. Press the up (▲) arrow button to select DIAGNOSTICS.
b. Press the ENTER button.
c. Press the right (►) arrow button to select TUNE.
d. Check
that Fine is showing on the right side of the LCD display.
8. Press the MODULE button until TG8000 appears.
9. Press the up (▲)arrowbuttontoselectUTILITY.
10. Press the ENTER button.
11. Press the up (▲)arrowbuttontoselectCAL OVEN : SELECT.
12. Press the ENTER button to access the Internal Frequency Calibration
submenu.
13. Press the ENTER button to start the calibration. The instrument will display
the stored calibration value.
14. Press the ENTER button.
15. Press the BACK button to exit the calibration menu when the calibration
is complete.
TG8000 Multiformat Test Signal Generator User Manual 3–101
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