Viavi T-BERD 5800, Руководство пользователя

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Chapter 3 High Accuracy Timing
Configuring the module
T-BERD/MTS/SC Timing Expansion Module User Manual
July 2017 22112315, Rev. 004 Page 29
TEM Module to leave the oscillator off by default, you must manually turn the oscillator
on to allow it to warm up.
To turn the oscillator on
• Press the grey Rubidium Osc. Off action button on the Timing Module tab. The
button turns yellow, and states Rubidium Osc. On .
The oscillator begins to warm up (as indicated by the text on the Status action button).
Configuring the module
Before using the TEM Module as a high accuracy timing reference, you must configure
the module to use a specific synchronization source. If you intend to use the internal
GNSS receiver as the synchronization source, you must also specify settings that indi-
cate how the receiver will obtain the timing and location information from GNSS satel-
lites (for example, the GNSS system that will provide the information, whether
augmented information will be used in addition to that provided by the satellites, and
whether you intend to conduct a survey of satellites to obtain the information).
Specifying oscillator and timing settings
Before tuning the TEM Module’s rubidium oscillator to a synchronization source, you
must ensure that the TEM is in Tuning mode, then specify the source that is providing
the reference signal (and frequency). You can also indicate whether the oscillator
should turn On or remain Off when the 5800v2 is powered on, and specify the maximum
acceptable drift allowed while operating in Holdover Mode.
To specify oscillator and timing settings
1 Select the Timing Module tab, then select the Setup soft key.
2 On the left of the screen, select Oscillator/Timing .
The Oscillator/Timing setup tab appears.
3 Under Mode , select Tuning .