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## Project description
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**BabyWR** is being developed as a cost effective and small pluggable WR node. BabyWR has a [M.2 form-factor](https://en.wikipedia.org/wiki/M.2). BabyWR is designed for low phase noise (10 MHz; < -100 dBc/Hz @ 10 Hz) timing generation. For applications that demand ultimate low phase noise, an external high precision oscillator can be disciplined and used as reference clock.
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This M.2 Type 2280-D6-M form factor module is a Phase Noise improved version of [it's predecessor](https://ohwr.org/project/babywr/wikis/BabyWR-carrier_V2.0). The 10 MHz and 1 PPS signals that are generated by the [White Rabbit PTP Core](https://ohwr.org/project/wr-cores/wikis/Wrpc-core) on the FPGA are re-clocked by the clean reference oscillator. By re-arranging the assembly of a few resistors, the module allows to output the clean 100 MHz reference clock signal directly, once "lock sweep" is implemented.
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This M.2 Type 2280-D6-M form factor module is a Phase Noise improved version of [it's predecessor](https://ohwr.org/project/babywr/wikis/BabyWR-carrier_V2.0). The 10 MHz and 1 PPS signals that are generated by the [White Rabbit PTP Core](https://ohwr.org/project/wr-cores/wikis/Wrpc-core) on the FPGA are re-clocked by the clean reference oscillator. For re-clocking "lock sweep" needs to be implemented in order to find the have proper phase alignment. By re-arranging the assembly of a few resistors, the module allows to output the clean 100 MHz reference clock signal directly.
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**BabyWR-Carrier** is a [SPEC](https://ohwr.org/project/spec/wikis/home) like PCIe card ([Figure 3](#babywr-carrier)) that can accept a BabyWR for test purposes. Like the SPEC, BabyWR-Carrier has a PCIe interface, an SFP+ cage, a (not fully populated) LPC FMC connector, JTAG- and USB-interface, LEDs, button and GPIO headers.
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... | ... | @@ -136,4 +136,4 @@ _Figure 3: BabyWR-Carrier PCB._ |
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25 March 2024 |
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25 April 2024 |
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