Re: [ARTIQ] Sayma input frequency
On Tuesday, June 26, 2018 01:53 AM, Joe Britton via ARTIQ wrote: My comment echos Daniel's. Getting 150 MHz reference oscillators is a special order. What's the motivation to switch to 150 MHz? Ditch a few lines of code. But it's fine, we support both 150MHz (used on the DRTIO satellite, clocking the 830 from the 5324) and 100MHz now. Sébastien ___ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
Re: [ARTIQ] Sayma input frequency
My comment echos Daniel's. Getting 150 MHz reference oscillators is a special order. What's the motivation to switch to 150 MHz? On Tue, Jun 19, 2018 at 12:06 PM, Kristin Beck via ARTIQ < artiq@lists.m-labs.hk> wrote: > I already have a 100MHz (non-programmable) clock in the lab, so I prefer > to continue supporting that in all levels (firmware, hardware, etc.) in the > long term. That said, the workarounds are not too onerous for getting up > and running initially--either Dan's suggestion of a non-standard 150MHz > clock or Tom's suggestion of modifying the dividers in our lab-specific > bitstream build would allow us to see full performance in the lab for > device testing. > > Best, > Kristi Beck > > ___ > ARTIQ mailing list > https://ssl.serverraum.org/lists/listinfo/artiq > > ___ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
Re: [ARTIQ] Sayma input frequency
I already have a 100MHz (non-programmable) clock in the lab, so I prefer to continue supporting that in all levels (firmware, hardware, etc.) in the long term. That said, the workarounds are not too onerous for getting up and running initially--either Dan's suggestion of a non-standard 150MHz clock or Tom's suggestion of modifying the dividers in our lab-specific bitstream build would allow us to see full performance in the lab for device testing. Best, Kristi Beck ___ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
Re: [ARTIQ] Sayma input frequency
Hi All, the frequency standard output generally 10MHz, many choices like SRS FS725 or FS740. Usually, they need the GPS to calibrate 1pps signal. I think it is more easy way to leave an 10MHz clock input, through I don't understand why almost all of the frequency standard output 10MHz. Best On Tue, Jun 19, 2018 at 10:01 AM Slichter, Daniel H. (Fed) via ARTIQ < artiq@lists.m-labs.hk> wrote: > It is certainly possible to get nice low-phase-noise sources at 150 MHz > instead of 100 MHz, but these would need to be special ordered. How much > of a challenge is using 100 MHz? Does the HMC830 not allow us leeway > here? > > One temporary solution would be to use an HMC830 (or equivalent) eval > board to generate 150 MHz from another reference frequency and feed that to > the Sayma input connector. However, over the longer term I think it would > be good to have Sayma able to operate from a more standard reference > frequency such as 100 MHz. > > > -Original Message- > > From: ARTIQ [mailto:artiq-boun...@lists.m-labs.hk] On Behalf Of > Sébastien > > Bourdeauducq via ARTIQ > > Sent: Monday, June 18, 2018 7:29 AM > > To: artiq@lists.m-labs.hk > > Cc: Ken Brown ; Jungsang Kim > > > > Subject: [ARTIQ] Sayma input frequency > > > > Hi, > > > > any objections to supporting only the RTIO clock frequency (currently > > 150MHz) at the Sayma input, instead of 100MHz? > > Are you using non-programmable 100MHz references? > > > > Sébastien > > ___ > > ARTIQ mailing list > > > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fssl.serverr > > aum.org > %2Flists%2Flistinfo%2Fartiq&data=02%7C01%7Cdaniel.slichter%40nist. > > gov%7C05f9ee8fb8ec4fc6878308d5d51f7c2f%7C2ab5d82fd8fa4797a93e054655 > > c61dec%7C1%7C0%7C636649253558496201&sdata=tfd6NTpKq73oYUwH3t7J9 > > w%2FUOnfF0IhOAa8ksKkYzB8%3D&reserved=0 > ___ > ARTIQ mailing list > https://ssl.serverraum.org/lists/listinfo/artiq > ___ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
Re: [ARTIQ] Sayma input frequency
It is certainly possible to get nice low-phase-noise sources at 150 MHz instead of 100 MHz, but these would need to be special ordered. How much of a challenge is using 100 MHz? Does the HMC830 not allow us leeway here? One temporary solution would be to use an HMC830 (or equivalent) eval board to generate 150 MHz from another reference frequency and feed that to the Sayma input connector. However, over the longer term I think it would be good to have Sayma able to operate from a more standard reference frequency such as 100 MHz. > -Original Message- > From: ARTIQ [mailto:artiq-boun...@lists.m-labs.hk] On Behalf Of Sébastien > Bourdeauducq via ARTIQ > Sent: Monday, June 18, 2018 7:29 AM > To: artiq@lists.m-labs.hk > Cc: Ken Brown ; Jungsang Kim > > Subject: [ARTIQ] Sayma input frequency > > Hi, > > any objections to supporting only the RTIO clock frequency (currently > 150MHz) at the Sayma input, instead of 100MHz? > Are you using non-programmable 100MHz references? > > Sébastien > ___ > ARTIQ mailing list > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fssl.serverr > aum.org%2Flists%2Flistinfo%2Fartiq&data=02%7C01%7Cdaniel.slichter%40nist. > gov%7C05f9ee8fb8ec4fc6878308d5d51f7c2f%7C2ab5d82fd8fa4797a93e054655 > c61dec%7C1%7C0%7C636649253558496201&sdata=tfd6NTpKq73oYUwH3t7J9 > w%2FUOnfF0IhOAa8ksKkYzB8%3D&reserved=0 ___ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
[ARTIQ] Sayma input frequency
Hi, any objections to supporting only the RTIO clock frequency (currently 150MHz) at the Sayma input, instead of 100MHz? Are you using non-programmable 100MHz references? Sébastien ___ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
