Posts by G8UGD

    Hello Adrian, i confirm that the new firmware version of Evariste is based on the 0.32 of Adalm and therefore has several advantages and new commands including the possibility of having a partition to statically write files, in this way it is possible to make changes without recompiling the firmware entirely.
    I will be happy to meet you in DATV, i think soon


    Roberto IS0GRB

    Hello Evariste

    I was going from the comments of Roberto above in this thread suggesting that the new firmware was based on 0.32? Hence, I was probably wrong in thinking that the firmware would require it?

    Roberto thanks for the SSH commands I will write these in my book so I have them for reference.




    Your Pluto is connected via usb or ethernet ?

    if it is via ethernet you simply have to upgrade the new firmware with your web brouwser .....

    Best regards

    ON1RC Chris

    Hello Chris

    It is connected via Ethernet with a USB to Ethernet adaptor, I know I can update the DATV firmware via the browser page pluto.php, but I had assumed, possibly wrongly, that to do an upgrade from 0.31 to 0.32 I needed to do it via the USB disk method?

    This was down to needing to transfer the files boot.dfu, boot.frm, Pluto.dfu, uboot-env.dfu and the version 0.32 pluto.frm which then meant the DATV firmware was overwritten and pluto.php web page was no longer there?



    Unfortunately I have the Pluto in a box outside very close to my dish so access to it is generally via SSH. I did have to remove it and update using the drive option, but in Linux and that worked OK.

    If I change the file it does change it and I can read it back but does not seem to be permanent when I reboot Pluto with reboot now, it just goes back to default, I will look further into permissions.

    If necessary I will remove again and edit as a disk.



    Hello Roberto may I ask,

    When I ssh into the Pluto such as root@ I am not finding config.txt to change the IP of the unit via the USB to Ethernet adaptor.

    I can find config.txt in the /opt directory but when I edit with nano and change the lines

    ipaddr_eth =
    netmask_eth =

    to be

    ipaddr_eth =
    netmask_eth =

    and save the file, it is not used on reboot and everything goes back to dhcp settings again.

    So where is the config file to edit now stored? I am trying to keep the IP address of pluto off the routers dhcp service and using a static IP address.

    I have updated to firmware 0.32 and installed the pluto.frm all OK.

    Hope you can help.


    Thank you Roberto for your response it is appreciated, I have read the odd comment in the past about using USB hubs etc and copying files from location to location.

    When i read this thread the other day I noticed you are now using a version 0.32 of Pluto firmware so that will be something I can at least look for and download ready to install.

    As I say it is good to be able to test and report back if one finds issues or has success. I will await a beta version and upgrade at that point, the new band-plan in the Pluto would make operation easier. I hope we can converse at some point via DATV.

    Many thanks to you all for the continued development.



    Hello Evariste and Roberto. I can appreciate all the work you are doing, but can I ask, for those of us that are not programmers that are using an external box to do H265 rather than using a video card on the PC, what do we need to do to update to the latest version and test the capabilities of the update. What has changed, it would be nice to assist in any way one can even if just with testing.?

    Hope you do not mind explaining.


    I have no solutions on the self oscillation of the units, I did have one that was lively on power up, but put that down to to much heatsink compound, now I only have a minute dab of it in the very centre of the devices. I removed the input circulator and 2.2Ghz filter and replaced with co-ax, had to then solder that down to the board or it acted like a pick up loop and caused some instability, but has been generally quite good. Only thing I can think of if you still have the output circulator fitted is to make sure that is still a very good ground on it's case, if you have removed the circulator from the output, then most take the power from the input to the circulator rather than the original connector, but others have gone different ways from what I can tell. So I tend to think it could be what ever works for you with that, try dropping to 26 Volts from 28 and see if that helps any???


    Adrian, many thanks for your prework and especially for your bias schematic, this was really helpful to check, whether there was a problem with the circuit.


    I am pleased my time has helped, and even more pleased that you have taken it further and made life that bit easier with your work, thanks for that. I am not into arduino programming so that was probably above me.

    Hi all; No problems waiting.

    I am now picking up the beacon at an MER of 10, which is still a D5 with the change in FEC, so from that perspective the playing has gone well.

    There were a few 1MS signals up at the same level as the beacon, so guess for the time being the overpower indicator is level with it.

    My thoughts were on increased power requirements of the satellite if there was an average increase in power usage overall and as large signals tend to drop the re-transmitted signal then lower EIRP users could see a more drastic reduction in their signals through the satellite.

    I am happy to wait for the bandplan changes to be announced then I can send updated spreadsheets around to a few friends to assist them with their operation 333KS1 333 KS2 etc.

    Be happy, stay safe.


    Hello Peter and the group.

    I am positive that the beacon changes will be seen as good for all DATV users and I will say thank you to the team for doing it.

    I wonder if the Overpower indicator would be left at the previous power level for wide signals as really nothing else has changed for us apart from getting more space?

    It may be that the overpower has to be set at the same level as the beacon I am not sure, I will monitor when others get it and see.

    Any thoughts?



    I ordered modules from three different Ebay sellers and received two modules with the correct housing but the wrong chip. The wrong chip delivers about 500mW at 1.8GHz, but does not work at 2.4GHz. Has 5V bias on the left and UB 28V on the right !

    Can I just ask if you are saying you have 5Volts on the left Vdd (pin 2) and not 28 Volts? Did you get a datasheet provided with it? On my MHL-21336 both Vdd pins are at 28 Volts.


    How can i put a roll off of 20 in the script in

    The new firmware i can put fec sr but i dont read about the rolloff please help me ?

    That seems to be correct at present, with tests done for myself, I saw very little changes at the lower SR rates, but when you get to 1MS the settings kick in. The shape of the signal would get steeper sides. I think the best I could get was a roll off of 25, It could be down to a few things such as the modulator in the Pluto or to a feature to be worked on in firmware.

    I tend to set 0.25 roll off and let the Pluto do it's work. Looking forward to the next revision, but also consider this is not commercial software so it could take time as I am sure that Evariste will have more pressing matters.


    No, I know about the 8 main frequency and SR presets. What I mean is when you hit the 'OSCAR 100' button it brings out a sub menu of other preset SR and frequencies. If the beacon changes to be 1500MS as quoted, then in my mind it is also likely that the suggested channelised band plan may change. Which could mean a change to this sub menu.


    I will stick a response in here.

    The question for me was basically when does it become remote, as said, I find some terms confusing, in my mind my setup is remote as it is all controlled via a computer but granted all at my own address. I was trying to get a better understanding and gather remote is simply being away from home but operating equipment at home. So thank you very much Thomas!

    I might also suggest that if I was 100 miles away from home on holiday with dish and setup I would class that as portable, and appreciate I should not operate my registered station back at home via remote control.

    I am personally not planning on doing remote operation, so please no twisting of underwear. There is a thread on Facebook where a US op was building a remote station and I responded to them saying to check as I believed what they were planning was not permitted, the response back to me inferred Amsat-dl and others were OK with his plans so I simply posted a question here to try and get some clarification for myself.

    Have fun people.


    Sorry for the ramblings of an Old Git!:)

    A recent thread on a Facebook group has me thinking about this, and as I know very little about remote operation, (yes I get the principle). Got me thinking what is a remote station. For example, I run a DATV station here at my registered station address. The actual transmitter and dish system is a Pluto and amps via a network connection to place it all at my dish. Receive is done either via Minitioune or longmynd, again via network connections and the pictures can be streamed from a thin client to a screen on my main PC. Everything is controlled via software. To me that is still remote operation as I do not have my hands on the equipment, but all OK as it is at my location and I can stop all very quickly if told to.

    But there is nothing stopping me being 100 miles away and doing the same, video/audio via a RTMP stream and vnc to control. At what point does the station become remote? I can only assume when I am a distance from main address.

    Could I then allow someone else to operate my station providing I am sat here? If so who's metta data would I have to transmit, my own or the others stations ID.

    Sorry for the questions, but I do get confused with some of the terminology and having a prolong absence from the hobby did not help.