Meinberg TCR180, Руководство пользователя

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5 Master oscillator
5 Master oscillator
By default the TCR180 is equipped with a TCXO (Temperature Compensated Xtal Oscillator) as master os-
cillator to provide a good time accuracy and frequency stability. As long as an input signal is supplied the
frequency of the oscillator is adjusted from the input signal, and if the input signal is disconnected afterwards
the card can still provide accurate time for a certain holdover interval. Optionally the card can be ordered with
an OCXO (Oven Controlled Xtal Oscillator) which provides even better frequency stability, and thus provides
more accuracy over a longer holdover interval than the TCXO.
All internal timing as well as the output signals are derived from the oscillator. The last known good os-
cillator adjustment value is stored in non-volatile memory, and is used as default after power-up.
The oscillator’s 10 MHz output frequency is also available with TTL level via at a ribbon cable connector.
TCR180 Date: 4th June 2021 9