Paradise Datacom 4 RU Chassis, Operation Manual

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76 201627 REV X 4 RU SSPA Chassis Operations Manual
6.3 Smart Reference Technology
Teledyne Paradise Datacom’s new ZBUC converter comes standard with smart refer-
ence technology. Smart reference technology allows the system operator to change
external system reference frequency without any system configuration required. The
ZBUC converter will automatically sense and lock to any one of the following system
reference frequencies: 10, 20, 25, and 50 MHz. With the internal reference option
installed, the ZBUC converter will operate with no external reference applied. In the
event the system operator wishes to operate on external reference, the ZBUC
converter will automatically sense the presence of an external reference and switch to
external reference mode. With the internal reference option installed, the internal refer-
ence also becomes a backup reference which will become active in the event that
external system reference is lost.
External reference is applied to the ZBUC converter via the L-Band input IFL and is
routed to the frequency synthesizer using the built-in demux circuitry.
Notes:
1) The external reference option requires the system operator to provide system
reference to the ZBUC/SSPB. The system will not lock and will have no output
without external reference applied.
2) Internal reference option allows for either internal or external reference
operation.
A ZBUC converter with an internal 10 MHz crystal reference has the following specifi-
cations:
Frequency Stability:
≤ ±5 • 10
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over the temperature range -40 to +90 °C
≤ ±1 • 10
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aging per day
≤ ±5 • 10
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aging per year
Warm up time: 20 minutes for better than ≤ ±1 • 10
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Phase Noise: 10 Hz -120 dBc/Hz
100 Hz -140 dBc/Hz
1 KHz -145 dBc/Hz
10 KHz -152 dBc/Hz
100 KHz -155 dBc/Hz
Frequency Accuracy: Factory preset to ≤ ±1 • 10
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