Siemens NFR2001 » History » Version 2
laforge, 03/11/2024 11:28 AM
1 | 1 | laforge | h1. Siemens NFR2001 |
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5 | 1 | laforge | h2. Overview |
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7 | The Siemens *Normalfrequenzeinrichtung NFR2001* is a clock processing, selection and distribution unit for PDH and SDH networks. It receives one or multiple reference signals [traditionally from atomic clocks], processes the signals to compensate for transmission errors and synchronizes a two-stage PLL to remove high frequency jitter and wander. |
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9 | The NFR2001 generates a local clock referecne which can be provided to PDH and SDH transmission equpment. |
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11 | In case the active reference signal fails, the NFR2001 provides fail-over from its internal reference until the firmware has switched over to a new reference signal. |
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13 | NFR2001 is internally redundant; all components/modules exist twice and can fail-over whenever needed. This also allows servicing or upgrade/downgrade while remaining fully operational. |
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15 | The NFR2001 allows for the following clock inputs: |
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16 | * 2.048 Mbit/s data signal |
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17 | * 2.048 MHz clock signal |
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18 | * 10 MHz clock signal |
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20 | The NFR2001 provides the following clock outputs: |
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21 | * [up to 60] 2.048 MHz clock reference outputs (G.703) 75 ohms unbalanced or 120 ohms balanced. |
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23 | 2 | laforge | h2. Hardware |
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31 | h2. Manuals (German) |
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33 | * attachment:"NFR2001 Information.pdf" |
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34 | * attachment:"NFR2001 Bedienung.pdf" |