Siemens NFR2001 » History » Version 1
laforge, 03/10/2024 10:39 AM
1 | 1 | laforge | h1. Siemens NFR2001 |
---|---|---|---|
2 | |||
3 | h2. Overview |
||
4 | |||
5 | 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. |
||
6 | |||
7 | The NFR2001 generates a local clock referecne which can be provided to PDH and SDH transmission equpment. |
||
8 | |||
9 | 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. |
||
10 | |||
11 | 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. |
||
12 | |||
13 | The NFR2001 allows for the following clock inputs: |
||
14 | * 2.048 Mbit/s data signal |
||
15 | * 2.048 MHz clock signal |
||
16 | * 10 MHz clock signal |
||
17 | |||
18 | The NFR2001 provides the following clock outputs: |
||
19 | * [up to 60] 2.048 MHz clock reference outputs (G.703) 75 ohms unbalanced or 120 ohms balanced. |
||
20 | |||
21 | |||
22 | h2. Manuals (German) |
||
23 | |||
24 | * attachment:"NFR2001 Information.pdf" |
||
25 | * attachment:"NFR2001 Bedienung.pdf" |