Revision C Pluto

I saw the photographs of a new version of the pluto that came to a German radio amateur.He got this new version without asking for it .. is it a pre-series?

thanks for your kind attention

https://forum.amsat-dl.org/index.php?thread/3686-adalm-pluto-revision-c/

I recently bought an Adalm-Pluto, the GPSDO of Leo Bodnar, studied all notes regarding modification and was surprised that my Pluto is looking totally different from what I have seen so far. To make a long story short, I got revision C and unfortunately, I could not find any documentation in the internet. Difference is that TCXO is on the secondary side of the board and that four small connector sockets (IPX?) are on the primary side. One of them is marked as “CLK_IN 3V3 Max” another as “CLK_OUT”. It seems to me that no further modification is needed to feed in the signal of an external GPSDO but I am not sure.- Does anybody already has modified Rev C for QO-100 use?- How to feed in the signal of my GPSDO?- Anything else I have to consider or take care about?

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  • 0
    •  Analog Employees 
    on Mar 11, 2021 5:05 AM

    Sorry for the delay - we are in process of adding doc now.

    There is some at:

    https://wiki.analog.com/university/tools/pluto/marketing

    https://wiki.analog.com/university/tools/pluto/devs/booting

    https://wiki.analog.com/university/tools/pluto/hacking/hardware

    We were surprised to hear that some ADI distributors are shipping rev C already. From our rough guesses/calculations - both Digikey and Mouser (last week) had at least 1/2 their inventory was a mix of rev B and rev C; so we thought we had a little more time. (But this should serve as a warning that as of today, when you order something - you may receive what you paid for - a 1 x 1 Radio).

    If you can give us to Friday - we will try to have the rest of the doc up by then.

    But to answer your questions:

    •  u.FL connectors : https://en.wikipedia.org/wiki/Hirose_U.FL
    • Yes, there is a 3.3V clock input - we have tested Leo Bodnar; and it works fine (just need to add the rest of the boot magic doc so you know how to wiggle all the right pins). Hopefully I can not pay attention to some meetings tomorrow, so I can finish this.
    • This clock input is also driven back out; so you can daisy chain devices; to make things like this : https://coherent-receiver.com/pluto-sdr easier. (still a far cry from, and I would never call it "coherent", but at least all the radios will drift the same way, and have a constant (but random) offset.

    -Robin

  • Hi Robin,

    great news since pluto clones are coming to market. few questions:

    in https://wiki.analog.com/university/tools/pluto/hacking/hardware you say:

    "The 2nd Rx/Tx channel internal to the rev D is not test during production test. If it works - bonus! If it doesn't work; Pluto isonly advertised as a 1 Rx, 1 Tx radio, and that is guaranteed/production tested on each unit - and that is what you received."

    To enable the second path we are on our own or you will provide the method to use it or maybe support to do it?.

    In schematics the u.FL RX has 2 resistors of 0 ohms connected to ground.why?. we have to modify it to use the second input?.

    How to enable the external clock?.

    The output clock is only for the external input clock or can output the internal clock?.

    P.D.please for this revision or next one you could include a xilinx jtag compatible connector to avoid to purchase the adalm jtag uart board witch price its very high for the purpose and now it doesn't make any sense since the uart is included in the second usb port.

    Thanks!.

Reply
  • Hi Robin,

    great news since pluto clones are coming to market. few questions:

    in https://wiki.analog.com/university/tools/pluto/hacking/hardware you say:

    "The 2nd Rx/Tx channel internal to the rev D is not test during production test. If it works - bonus! If it doesn't work; Pluto isonly advertised as a 1 Rx, 1 Tx radio, and that is guaranteed/production tested on each unit - and that is what you received."

    To enable the second path we are on our own or you will provide the method to use it or maybe support to do it?.

    In schematics the u.FL RX has 2 resistors of 0 ohms connected to ground.why?. we have to modify it to use the second input?.

    How to enable the external clock?.

    The output clock is only for the external input clock or can output the internal clock?.

    P.D.please for this revision or next one you could include a xilinx jtag compatible connector to avoid to purchase the adalm jtag uart board witch price its very high for the purpose and now it doesn't make any sense since the uart is included in the second usb port.

    Thanks!.

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