1: Overview of the XL-GPS Time and Frequency Receiver
In addition, the following software-enabled optional features can be purchased and enabled
using a software key at any time:
• Network Time Server (NTS)
• Programmable Pulse Output (PPO)
• Time Interval, Event Time (TI/ET)
• Frequency Measurement (FREQ MEAS)
The optional OCXO oscillator upgrade provides enhanced short-term stability while locked to
GPS, and improved holdover ‘flywheeling’ when GPS is unavailable.
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