Re: [casper] Question about FPGA Roach2

2022-07-12 Thread Bob Stricklin
Hi Grace, If you are using a linux computer you can issue the command line instruction: arp -a You will see a list of devices active If your have a windows computer open a CMD window and issue the same command and see the devices. Hope this helps. Bob On Jul 12, 2022, at 3:38 PM, Michael

Re: [casper] Calculating Arctan on FPGA

2021-12-13 Thread Bob Stricklin
Consider making a lookup table. If your accuracy requirements and space will allow it. This is the way things use to be done before calculators and computers and it will work in a lot of cases. Bob Stricklin > On Dec 13, 2021, at 6:55 AM, baldwin wrote: > > Hi Guys, > > Quic

Re: [casper] ROACH-2 Poor Sampling

2021-12-09 Thread Bob Stricklin
will be interested to see what you find. Bob Stricklin On Dec 9, 2021, at 9:49 PM, 'Benjamin Godfrey' via casper@lists.berkeley.edu<mailto:casper@lists.berkeley.edu> mailto:casper@lists.berkeley.edu>> wrote: Hi Tony, I do not think there is a header. At least I am collecting as much data

Re: [casper] System Verilog

2021-06-24 Thread Bob Stricklin
on at a lower cost to you. Bob Stricklin On Jun 24, 2021, at 8:30 PM, Brian Bradford mailto:bbradford...@gmail.com>> wrote: Hey Jack, A little late here but better late than never I suppose... Papers worth a read: * https://sutherland-hdl.com/papers/2013-SNUG-SV_Synthes

Re: [EXTERNAL] [casper] seeking high accuracy GPS disciplined time/frequency standards ?

2019-03-13 Thread Bob Stricklin
All, Since you mostly have a nice radio telescope handy you could also calibrate your time standards by using a paticular pulsar and an agreed upon method. Bob Stricklin On Mar 13, 2019, at 1:23 AM, David MacMahon mailto:dav...@berkeley.edu>> wrote: Hi, Dan, Thanks for summarizi

Re: [EXTERNAL] [casper] seeking high accuracy GPS disciplined time/frequency standards ?

2019-03-08 Thread Bob Stricklin
Here is a link to an Analog Devices Ap note discussing an accurate timing reference. It may be a good reference to help you. https://www.analog.com/media/en/technical-documentation/application-notes/AN-1002.pdf Bob Stricklin On Mar 8, 2019, at 8:04 PM, John Ford mailto:jmfor...@gmail.com

Re: [casper] Raspberry Pi 3 B+ Image Corrupt?

2018-10-19 Thread Bob Stricklin
a preconfigured SNAP image you may be able to skip this step. Run ifconfig to determine the Pi ip address and mac address. You can set this to be static in the Pi or force it on your router. Bob Stricklin On Oct 19, 2018, at 1:20 PM, David Marsh mailto:davidmma...@gmail.com>> wrote: Hell

Re: [casper] SNAP Board clocking for a low-frequency array

2018-10-19 Thread Bob Stricklin
interfaces… http://www.ti.com/lit/an/scea035a/scea035a.pdf I am a retired engineer that follows this list and offer these suggestions to hopefully help you in your efforts. Bob Stricklin On Oct 19, 2018, at 2:04 AM, Nitish Ragoomundun mailto:nitish.ragoomun...@gmail.com>> wrote: Hi al

Re: [casper] Timing distribution over fiber

2015-05-04 Thread Bob Stricklin
but with considerable development time. Bob Stricklin On May 4, 2015, at 10:02 PM, Jack Hickish jackhick...@gmail.commailto:jackhick...@gmail.com wrote: Hi John, Thanks for the info. I'll add Litelink to my list of suppliers to investigate. We have no particular urge to multiplex the signals

Re: [casper] {Disarmed} Problem with ROACH2 netboot

2015-02-07 Thread Bob Stricklin
VFS: Mounted root (nfs filesystem) readonly on device 0:11. Note that your root is being mounted as read only. Must have an issue in a config file on new machine or a file/directory is not configured for write/execute. Use ls -l to review permissions. Use chmod to change the permissions.