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Feature Descriptions MDM6000 Satellite Modem
14.5 Reference Clock
MDM6000 >> Ref Clock
Configure the reference clock.
This reference signal for an outdoor BUC is multiplexed on the L-band Tx or on the 10MHz REF out
interface of the back panel.
(Note, this 10MHz REF out is an optional interface.)
A reference clock can be generated internally (default) or slave on an external source.
The internal reference clock is 10MHz.
The clock reference has the following specifications:
10MHz Ref Specifications
Internal clock reference Stability ± 2000 ppb over 0 to 70°C
Ageing ± 1000 ppb/year
Very High Stability (optional) Stability ±2x10e-9 over 0°C to 65°C
Ageing: ± 0.5 ppb/day
± 500 ppb/10 year
When an external source is selected (attached to 10MHz ref In interface), the following frequencies
can be inserted.
1MHz, 2MHz, 5MHz, 10MHz or 20MHz.
Select the external clock reference for synchronization with other devices to have a higher stability
than the internal default stability.
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