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Re: Which TMS570?
by Bob Stricklin 03 May '23

03 May '23

Jonathan, The key part number is the one I have given you. This defines the 144 pin package and the definition of each pin. The QQ! on the end are: 1st Q - Temp range -40 to 125C Q1 - Automotive grade There can be a R on the end also which would bean tape and reel. No R would mead a flat pack. We could use either one. For prototype builds we could use other grades. For flight hardware we would like to have the best grade. Since a lot of TI volume is in automotive that grade which is probably the best we would want to pay for is not so expensive unless the price starts ratcheting up due to shortages. Bob > On May 3, 2023, at 9:27 PM, Jonathan Brandenburg via pacsat-dev <pacsat-dev(a)amsat.org> wrote: > > I should point out the BoM I have is from the most recent board assembly but it was emailed directly from Zach so I don't know if it was posted to Subversion. (It is now as Cameron has been tracking down the latest schematics and layouts for the RT-IHU and has ensured they're posted to Subversion.) > > Bob, you're listing a slightly different part number... Is that significant? Could that have been from a previous BoM? This is confusing to me :( > > Jonathan > > On 5/3/2023 9:23 PM, Jonathan Brandenburg via pacsat-dev wrote: >> >> The RT-IHU BoM is showing TMS5700914APGEQQ1 for the complete part number... There is a good chance Zach Metzinger has a small supply of those but it's not clear to me how those are allocated. Perhaps reaching out to Zach is appropriate, especially for the initial boards. >> >> Thoughts? >> >> Jonathan >> >> On 5/3/2023 9:18 PM, Bob Stricklin via pacsat-dev wrote: >>> Jonathan, >>> >>> The chip number I am working with is: >>> >>> TMS570LS0914PGE >>> >>> This is the same part used on other AMSAT designs. I had looked into ordering a few also and noticed the long lead-time. >>> I would like to have two or three of these myself. >>> >>> There is a possibility someone else has a few left over from earlier builds. >>> >>> I would not be surprised to see the delivery keep getting pushed out. If China invades Taiwan we may never see them again. I don’t think a lot of Americans realize the impact this will have. >>> >>> Bob >>> >>> >>>> On May 3, 2023, at 5:16 PM, Jonathan Brandenburg via pacsat-dev <pacsat-dev(a)amsat.org> wrote: >>>> >>>> Howdy! >>>> >>>> Which TMS570 are you currently planning to use on the PACSAT board? I ask because I'd like to get an order in as stock is still sporadic. >>>> >>>> In particular, the RT-IHU uses the TMS5700914APGEQQ1, which I have ordered from Mouser but delivery is currently scheduled for Jan 2024. Digikey lists Nov 2023 for delivery at this time. >>>> >>>> The Launchpad uses a TMS570LS1224 device with one part, TMS5701224CPGEQQ1 showing a July 2023 delivery from Mouser and Digikey showing January 2024. >>>> >>>> I have admittedly done no research on the capabilities offered by these parts but I'm happy to order when we know what PACSAT will fly. >>>> >>>> Jonathan >>>> >>>> -- >>>> jbrandenburg(a)amsat.org >>>> >>>> >>>> ----------------------------------------------------------- >>>> >>>> pacsat-dev mailing list -- pacsat-dev(a)amsat.org >>>> View archives of this mailing list at https://url.emailprotection.link/?buUg7YY4HZLXKo6ZKNudC8bRTBdOsBlAV5C9rq-aq… >>>> To unsubscribe send an email to pacsat-dev-leave(a)amsat.org >>>> Manage all of your AMSAT-NA mailing list preferences at https://url.emailprotection.link/?bO71JCUf8Kb7txAlIoAarNqcIdQhyb8VQQIN4j0Gi… >>> >>> ----------------------------------------------------------- >>> >>> pacsat-dev mailing list -- pacsat-dev(a)amsat.org >>> View archives of this mailing list at https://url.emailprotection.link/?buUg7YY4HZLXKo6ZKNudC8bRTBdOsBlAV5C9rq-aq… >>> To unsubscribe send an email to pacsat-dev-leave(a)amsat.org >>> Manage all of your AMSAT-NA mailing list preferences at https://url.emailprotection.link/?bO71JCUf8Kb7txAlIoAarNqcIdQhyb8VQQIN4j0Gi… >> > -- > jbrandenburg(a)amsat.org > > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at https://url.emailprotection.link/?buUg7YY4HZLXKo6ZKNudC8bRTBdOsBlAV5C9rq-aq… > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at https://url.emailprotection.link/?bO71JCUf8Kb7txAlIoAarNqcIdQhyb8VQQIN4j0Gi…

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Re: Which TMS570?
by Jonathan Brandenburg 03 May '23

03 May '23

I should point out the BoM I have is from the most recent board assembly but it was emailed directly from Zach so I don't know if it was posted to Subversion. (It is now as Cameron has been tracking down the latest schematics and layouts for the RT-IHU and has ensured they're posted to Subversion.) Bob, you're listing a slightly different part number... Is that significant? Could that have been from a previous BoM? This is confusing to me :( Jonathan On 5/3/2023 9:23 PM, Jonathan Brandenburg via pacsat-dev wrote: > > The RT-IHU BoM is showing TMS5700914APGEQQ1 for the complete part > number... There is a good chance Zach Metzinger has a small supply of > those but it's not clear to me how those are allocated. Perhaps > reaching out to Zach is appropriate, especially for the initial boards. > > Thoughts? > > Jonathan > > On 5/3/2023 9:18 PM, Bob Stricklin via pacsat-dev wrote: >> Jonathan, >> >> The chip number I am working with is: >> >> TMS570LS0914PGE >> >> This is the same part used on other AMSAT designs. I had looked into >> ordering a few also and noticed the long lead-time. >> I would like to have two or three of these myself. >> >> There is a possibility someone else has a few left over from earlier >> builds. >> >> I would not be surprised to see the delivery keep getting pushed out. >> If China invades Taiwan we may never see them again. I don’t think a >> lot of Americans realize the impact this will have. >> >> Bob >> >> >>> On May 3, 2023, at 5:16 PM, Jonathan Brandenburg via pacsat-dev >>> <pacsat-dev(a)amsat.org> wrote: >>> >>> Howdy! >>> >>> Which TMS570 are you currently planning to use on the PACSAT board? >>> I ask because I'd like to get an order in as stock is still sporadic. >>> >>> In particular, the RT-IHU uses the TMS5700914APGEQQ1, which I have >>> ordered from Mouser but delivery is currently scheduled for Jan >>> 2024. Digikey lists Nov 2023 for delivery at this time. >>> >>> The Launchpad uses a TMS570LS1224 device with one part, >>> TMS5701224CPGEQQ1 showing a July 2023 delivery from Mouser and >>> Digikey showing January 2024. >>> >>> I have admittedly done no research on the capabilities offered by >>> these parts but I'm happy to order when we know what PACSAT will fly. >>> >>> Jonathan >>> >>> -- >>> jbrandenburg(a)amsat.org >>> >>> >>> ----------------------------------------------------------- >>> >>> pacsat-dev mailing list -- pacsat-dev(a)amsat.org >>> View archives of this mailing list at >>> https://url.emailprotection.link/?buUg7YY4HZLXKo6ZKNudC8bRTBdOsBlAV5C9rq-aq… >>> To unsubscribe send an email to pacsat-dev-leave(a)amsat.org >>> Manage all of your AMSAT-NA mailing list preferences at >>> https://url.emailprotection.link/?bO71JCUf8Kb7txAlIoAarNqcIdQhyb8VQQIN4j0Gi… >> >> ----------------------------------------------------------- >> >> pacsat-dev mailing list -- pacsat-dev(a)amsat.org >> View archives of this mailing list at >> https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org >> To unsubscribe send an email to pacsat-dev-leave(a)amsat.org >> Manage all of your AMSAT-NA mailing list preferences at >> https://mailman.amsat.org > -- jbrandenburg(a)amsat.org

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Re: Which TMS570?
by Jonathan Brandenburg 03 May '23

03 May '23

The RT-IHU BoM is showing TMS5700914APGEQQ1 for the complete part number... There is a good chance Zach Metzinger has a small supply of those but it's not clear to me how those are allocated. Perhaps reaching out to Zach is appropriate, especially for the initial boards. Thoughts? Jonathan On 5/3/2023 9:18 PM, Bob Stricklin via pacsat-dev wrote: > Jonathan, > > The chip number I am working with is: > > TMS570LS0914PGE > > This is the same part used on other AMSAT designs. I had looked into ordering a few also and noticed the long lead-time. > I would like to have two or three of these myself. > > There is a possibility someone else has a few left over from earlier builds. > > I would not be surprised to see the delivery keep getting pushed out. If China invades Taiwan we may never see them again. I don’t think a lot of Americans realize the impact this will have. > > Bob > > >> On May 3, 2023, at 5:16 PM, Jonathan Brandenburg via pacsat-dev <pacsat-dev(a)amsat.org> wrote: >> >> Howdy! >> >> Which TMS570 are you currently planning to use on the PACSAT board? I ask because I'd like to get an order in as stock is still sporadic. >> >> In particular, the RT-IHU uses the TMS5700914APGEQQ1, which I have ordered from Mouser but delivery is currently scheduled for Jan 2024. Digikey lists Nov 2023 for delivery at this time. >> >> The Launchpad uses a TMS570LS1224 device with one part, TMS5701224CPGEQQ1 showing a July 2023 delivery from Mouser and Digikey showing January 2024. >> >> I have admittedly done no research on the capabilities offered by these parts but I'm happy to order when we know what PACSAT will fly. >> >> Jonathan >> >> -- >> jbrandenburg(a)amsat.org >> >> >> ----------------------------------------------------------- >> >> pacsat-dev mailing list -- pacsat-dev(a)amsat.org >> View archives of this mailing list at https://url.emailprotection.link/?buUg7YY4HZLXKo6ZKNudC8bRTBdOsBlAV5C9rq-aq… >> To unsubscribe send an email to pacsat-dev-leave(a)amsat.org >> Manage all of your AMSAT-NA mailing list preferences at https://url.emailprotection.link/?bO71JCUf8Kb7txAlIoAarNqcIdQhyb8VQQIN4j0Gi… > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org -- jbrandenburg(a)amsat.org

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Re: Which TMS570?
by Bob Stricklin 03 May '23

03 May '23

Jonathan, The chip number I am working with is: TMS570LS0914PGE This is the same part used on other AMSAT designs. I had looked into ordering a few also and noticed the long lead-time. I would like to have two or three of these myself. There is a possibility someone else has a few left over from earlier builds. I would not be surprised to see the delivery keep getting pushed out. If China invades Taiwan we may never see them again. I don’t think a lot of Americans realize the impact this will have. Bob > On May 3, 2023, at 5:16 PM, Jonathan Brandenburg via pacsat-dev <pacsat-dev(a)amsat.org> wrote: > > Howdy! > > Which TMS570 are you currently planning to use on the PACSAT board? I ask because I'd like to get an order in as stock is still sporadic. > > In particular, the RT-IHU uses the TMS5700914APGEQQ1, which I have ordered from Mouser but delivery is currently scheduled for Jan 2024. Digikey lists Nov 2023 for delivery at this time. > > The Launchpad uses a TMS570LS1224 device with one part, TMS5701224CPGEQQ1 showing a July 2023 delivery from Mouser and Digikey showing January 2024. > > I have admittedly done no research on the capabilities offered by these parts but I'm happy to order when we know what PACSAT will fly. > > Jonathan > > -- > jbrandenburg(a)amsat.org > > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at https://url.emailprotection.link/?buUg7YY4HZLXKo6ZKNudC8bRTBdOsBlAV5C9rq-aq… > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at https://url.emailprotection.link/?bO71JCUf8Kb7txAlIoAarNqcIdQhyb8VQQIN4j0Gi…

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Which TMS570?
by Jonathan Brandenburg 03 May '23

03 May '23

Howdy! Which TMS570 are you currently planning to use on the PACSAT board? I ask because I'd like to get an order in as stock is still sporadic. In particular, the RT-IHU uses the TMS5700914APGEQQ1, which I have ordered from Mouser but delivery is currently scheduled for Jan 2024. Digikey lists Nov 2023 for delivery at this time. The Launchpad uses a TMS570LS1224 device with one part, TMS5701224CPGEQQ1 showing a July 2023 delivery from Mouser and Digikey showing January 2024. I have admittedly done no research on the capabilities offered by these parts but I'm happy to order when we know what PACSAT will fly. Jonathan -- jbrandenburg(a)amsat.org

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Onsemi Technical Documentation
by Jim McCullers 03 May '23

03 May '23

Onsemi, the manufacturer of the AX5043 chip has recently revamped its technical documentation resulting in the loss of many if not all URL links to technical documents. The information continues to be available. The safest way to access the documents is to go to https://www.onsemi.com/ and click on 'Support' then "Technical Document Center' and use the search function to locate the documents of interest. The documents are presented in a different form than the old system but appear to be intact. Jim McCullers WA4CWI

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Re: Launchpad Board
by Burns Fisher (AMSAT) 02 May '23

02 May '23

Ok, great! I forget if I said before, but it is already loaded with the latest pacsat software. 73, Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software* On Tue, May 2, 2023 at 10:12 AM Bob Stricklin via pacsat-dev < pacsat-dev(a)amsat.org> wrote: > > Burns, > > I received the Launch Pad board just fine. Thanks very much. > > Bob N5BRG > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Launchpad Board
by Bob Stricklin 02 May '23

02 May '23

Burns, I received the Launch Pad board just fine. Thanks very much. Bob N5BRG

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RSSI / Signal generator
by Chris Thompson 29 Apr '23

29 Apr '23

I ran a test that Rich suggested. Specifically I used an HP signal generator to produce test signals of -50dBm to -90dBm. The received RSSI at the AX5043 is within 1 - 2dB. This suggests that the antenna connection, matching circuitry and filter are all working. The signal is getting to the chip as expected. Tuning the signal up/down does not improve things. So the chip does seem to be on the right frequency. I also ran the "test freq" function (after modifying it to work with the AX25 code). It transmits on the receive frequency, and it seems to be correct within a kHz or so. So this leaves us, as expected, with some sort of register setup issue. Given it is worse on 2m than 70cm it is perhaps a bandwidth or frequency acquisition issue. 73 Chris -- Chris E. Thompson chrisethompson(a)gmail.com g0kla(a)arrl.net

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Re: More RSSI
by Chris Thompson 29 Apr '23

29 Apr '23

Ok, I see that. I'm running that routine, so I just need to subtract 255 to get it into dBm. I will do that and then repeat the test that Rich described with a calibrated signal level. To see that it is receiving as expected. 73 Chris On Fri, Apr 28, 2023 at 4:09 PM Burns Fisher (AMSAT) via pacsat-dev < pacsat-dev(a)amsat.org> wrote: > Ok, I see. Yes, get_rssi does just what Rich says--it treats the byte as > signed and expands it to 16 bits. It then subtracts 64 to get the correct > RSSI value. But then it adds 255 to ensure that the value is a positive > unsigned value which it can send via telemetry. Then FoxTelem (which can > once again deal with negative numbers) subtracts off the 255 to again get > the value that Rich described. > > The console command "get rssi" also subtracts off the 255 and should give > the same number that FoxTelem would if we were using it. > > 73, > > Burns Fisher, WB1FJ > *AMSAT(R) Engineering -- Flight Software* > > > On Fri, Apr 28, 2023 at 3:58 PM Burns Fisher (AMSAT) <wb1fj(a)fisher.cc> > wrote: > >> Yes, I think get_rssi does some of that and then -255 does the rest, but >> it also involves converting from 8 to 16 bits and back, so I need to think >> about it. >> >> 73, >> >> Burns Fisher, WB1FJ >> *AMSAT(R) Engineering -- Flight Software* >> >> >> On Fri, Apr 28, 2023 at 3:56 PM Rich Gopstein via pacsat-dev < >> pacsat-dev(a)amsat.org> wrote: >> >>> This was from an old email to Burns: >>> >>> >>> I found this on the ONSEMI forums: >>> >>> AX-RadioLAB code sets the RSSIREFERENCE 64 dB (called RSSIOFFSET) higher >>> than the correct value and then subtracts 64 dB when reading out the RSSI >>> value. (And also corrects RSSIABSTHR by 64). This is to prevent wrap around >>> at -128 dBm, since the RSSI register is only 8 bit. >>> >>> So, it sounds like we're seeing the RSSI as 64dB higher than it really >>> is... >>> >>> ----------------------------------------------------------- >>> >>> pacsat-dev mailing list -- pacsat-dev(a)amsat.org >>> View archives of this mailing list at >>> https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org >>> To unsubscribe send an email to pacsat-dev-leave(a)amsat.org >>> Manage all of your AMSAT-NA mailing list preferences at >>> https://mailman.amsat.org >>> >> > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org > -- Chris E. Thompson chrisethompson(a)gmail.com g0kla(a)arrl.net

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