Spectracom GSG-5 series, Руководство пользователя с руководством по SCPI

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Figure 3-43:
User Calibration view
During the calibration, the unit generates an unmodulated signal at full power. Maximum RF
power is measured by a spectrum analyzer connected to the RF output of your GSG unit.
The OCXO DAC value is adjusted according to the frequency measured by the GSG unit from
the 10 MHz output at the back panel. Using a frequency counter, adjust the OCXO value until
the GSG shows 10 MHz.
The PPS delay is essentially an “equipment delay” of the generated signal. To measure it prop
erly, you need to measure the difference between the GSG's PPS out (Trigger out) and the PPS
out of a trusted GPS timing receiver. The value is always positive, and is set in microseconds.
Three digits can be given, enabling nanosecond resolution. The allowed range is [0.000-
4.000] microseconds.
Note that if you try to measure this delay, remember to take into account the GPS time to UTC
time offset set in the scenario you use. Timing receivers typically output the UTC synchronized
PPS signal.
After the calibration is complete, the new values can be saved by pressing exit or menu . Press
cancel to discard the values and keep the previous calibration settings.
3.6 "Options" Menu
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User Manual GSG-5/6 Series Rev. 26
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