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# eRTM15 LLRF White Rabbit
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## Project description
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The eRTM15-LLRF-WR module is a MTCA eRTM module with (redundant) fiber
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connection to a White Rabbit network.
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It provides clocks and LO/REF signals through the specific LLRF
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backplane to µRTM and AMC
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slots.
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[![](/uploads/8a0b61f7896bb6552aa69aa674ddd3d6/block_diagram.GIF)](/uploads/4acff1f0341916f0bc14b06ef91babbb/block_diagram_l.GIF)
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*Block diagram**
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-----
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## Main Features
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- 2 SFP cages for White Rabbit input
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- Front panel outputs
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- PPS
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- RTM clock
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- LO Mon
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- REF Mon
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- Calibration
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- Connector type?
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- Zone-3 backplane connector
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- 11 RTM\_CLK0 signals
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- 11 RTM\_CLK1 signals
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- Frequency multiple of 62.5 MHZ, LVPECL level
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- Clock skew \< 100ps
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- LO/REF/CAL backplane
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- 9 LO signals, 100-400 MHz
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- 9 REF signals, 100-400 MHz
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- 9 CAL signals, *f* RF
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- Designed for specific LLRF backplane
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-----
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## Detailed project information
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- " µTCA 4 WR LLRF
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RFC":https://www.ohwr.org/5467
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presentation with main concepts described, 12-07-2017
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- [MicroTCA.4
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RF-Backplane](http://mtca.desy.de/components/sites/site_mtca/content/e172206/e205636/e212584/e248086/uRFB_concept_Datasheet_19.12.2014_eng.pdf)
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- *Note: the backplane is not an open design and needs licensing
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from DESY. Patent application is filed: EP142004371.*
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<!-- end list -->
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- [Users](Users)
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-----
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## Contacts
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### Commercial producers
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- none
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### General questions about project
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- [Tomasz Wlostowski](https://www.ohwr.org/users/8), CERN
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-----
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## Status
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<table>
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<tbody>
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<tr class="odd">
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<td><strong>Date</strong></td>
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<td><b> Event </b></td>
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</tr>
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<tr class="even">
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<td>12-07-2017</td>
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<td><a href="https://www.ohwr.org/5467">Presentation</a> given by Mattia</td>
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</tr>
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<tr class="odd">
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<td>25-10-2017</td>
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<td>OHR project set up</td>
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</tr>
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</tbody>
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</table>
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-----
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25 October 2017
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### Files
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* [EDA-03849-V1_0_project.pdf](/uploads/fd5bb6173379da0b53075870d374557a/EDA-03849-V1_0_project.pdf)
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* [rf_board.pdf](/uploads/888ea940bdcc4ac67371967851c6e0da/rf_board.pdf) |
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\ No newline at end of file |