{"action":"created","issue":{"url":"https://api.github.com/repos/sinara-hw/Zotino/issues/2","repository_url":"https://api.github.com/repos/sinara-hw/Zotino","labels_url":"https://api.github.com/repos/sinara-hw/Zotino/issues/2/labels{/name}","comments_url":"https://api.github.com/repos/sinara-hw/Zotino/issues/2/comments","events_url":"https://api.github.com/repos/sinara-hw/Zotino/issues/2/events","html_url":"https://github.com/sinara-hw/Zotino/issues/2","id":324844039,"number":2,"title":"v1.2 cyclic failure every ~15s","user":{"login":"sbourdeauducq","id":720864,"avatar_url":"https://avatars2.githubusercontent.com/u/720864?v=4","gravatar_id":"","url":"https://api.github.com/users/sbourdeauducq","html_url":"https://github.com/sbourdeauducq","followers_url":"https://api.github.com/users/sbourdeauducq/followers","following_url":"https://api.github.com/users/sbourdeauducq/following{/other_user}","gists_url":"https://api.github.com/users/sbourdeauducq/gists{/gist_id}","starred_url":"https://api.github.com/users/sbourdeauducq/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sbourdeauducq/subscriptions","organizations_url":"https://api.github.com/users/sbourdeauducq/orgs","repos_url":"https://api.github.com/users/sbourdeauducq/repos","events_url":"https://api.github.com/users/sbourdeauducq/events{/privacy}","received_events_url":"https://api.github.com/users/sbourdeauducq/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"gkasprow","id":4325054,"avatar_url":"https://avatars3.githubusercontent.com/u/4325054?v=4","gravatar_id":"","url":"https://api.github.com/users/gkasprow","html_url":"https://github.com/gkasprow","followers_url":"https://api.github.com/users/gkasprow/followers","following_url":"https://api.github.com/users/gkasprow/following{/other_user}","gists_url":"https://api.github.com/users/gkasprow/gists{/gist_id}","starred_url":"https://api.github.com/users/gkasprow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gkasprow/subscriptions","organizations_url":"https://api.github.com/users/gkasprow/orgs","repos_url":"https://api.github.com/users/gkasprow/repos","events_url":"https://api.github.com/users/gkasprow/events{/privacy}","received_events_url":"https://api.github.com/users/gkasprow/received_events","type":"User","site_admin":false},"assignees":[{"login":"gkasprow","id":4325054,"avatar_url":"https://avatars3.githubusercontent.com/u/4325054?v=4","gravatar_id":"","url":"https://api.github.com/users/gkasprow","html_url":"https://github.com/gkasprow","followers_url":"https://api.github.com/users/gkasprow/followers","following_url":"https://api.github.com/users/gkasprow/following{/other_user}","gists_url":"https://api.github.com/users/gkasprow/gists{/gist_id}","starred_url":"https://api.github.com/users/gkasprow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gkasprow/subscriptions","organizations_url":"https://api.github.com/users/gkasprow/orgs","repos_url":"https://api.github.com/users/gkasprow/repos","events_url":"https://api.github.com/users/gkasprow/events{/privacy}","received_events_url":"https://api.github.com/users/gkasprow/received_events","type":"User","site_admin":false}],"milestone":null,"comments":5,"created_at":"2018-05-21T09:14:57Z","updated_at":"2018-05-21T14:50:06Z","closed_at":null,"author_association":"MEMBER","body":"Every ~15s my Zotino stops producing an output signal for a few seconds, and the blank period is followed by a burst of noise:\r\n![zotino_fail2](https://user-images.githubusercontent.com/720864/40299870-38cd48b4-5d1a-11e8-84f1-2bcc0ead50bc.jpg)\r\nThis is with a kernel that produces a 1kHz tone:\r\n```python\r\nimport struct\r\n\r\nfrom artiq.experiment import *\r\nfrom artiq.coredevice.ad53xx import *\r\n\r\nclass Tone(EnvExperiment):\r\n    def build(self):\r\n        self.setattr_device(\"core\")\r\n        self.setattr_device(\"zotino0\")\r\n\r\n    @kernel\r\n    def run(self):\r\n        self.core.reset()\r\n        self.zotino0.init()\r\n        delay(1*ms)\r\n        while True:\r\n            self.zotino0.write_dac(1, 0.1)\r\n            self.zotino0.load()\r\n            delay(0.5*ms)\r\n            self.zotino0.write_dac(1, -0.1)\r\n            self.zotino0.load()\r\n            delay(0.5*ms)\r\n```\r\n\r\nEven with nothing running on the core device, the bursts of noise are still observed, which points to a  hardware problem:\r\n![zotino_fail1](https://user-images.githubusercontent.com/720864/40299917-5e918b1e-5d1a-11e8-9b95-66ae9d4e8f33.jpg)\r\n"},"comment":{"url":"https://api.github.com/repos/sinara-hw/Zotino/issues/comments/390677210","html_url":"https://github.com/sinara-hw/Zotino/issues/2#issuecomment-390677210","issue_url":"https://api.github.com/repos/sinara-hw/Zotino/issues/2","id":390677210,"user":{"login":"sbourdeauducq","id":720864,"avatar_url":"https://avatars2.githubusercontent.com/u/720864?v=4","gravatar_id":"","url":"https://api.github.com/users/sbourdeauducq","html_url":"https://github.com/sbourdeauducq","followers_url":"https://api.github.com/users/sbourdeauducq/followers","following_url":"https://api.github.com/users/sbourdeauducq/following{/other_user}","gists_url":"https://api.github.com/users/sbourdeauducq/gists{/gist_id}","starred_url":"https://api.github.com/users/sbourdeauducq/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sbourdeauducq/subscriptions","organizations_url":"https://api.github.com/users/sbourdeauducq/orgs","repos_url":"https://api.github.com/users/sbourdeauducq/repos","events_url":"https://api.github.com/users/sbourdeauducq/events{/privacy}","received_events_url":"https://api.github.com/users/sbourdeauducq/received_events","type":"User","site_admin":false},"created_at":"2018-05-21T14:50:06Z","updated_at":"2018-05-21T14:50:06Z","author_association":"MEMBER","body":"> What is the output load ?\r\n\r\nOpen, I only have the scope (1M) connected."}}
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