{"action":"created","issue":{"url":"https://api.github.com/repos/pavel-demin/red-pitaya-notes/issues/250","repository_url":"https://api.github.com/repos/pavel-demin/red-pitaya-notes","labels_url":"https://api.github.com/repos/pavel-demin/red-pitaya-notes/issues/250/labels{/name}","comments_url":"https://api.github.com/repos/pavel-demin/red-pitaya-notes/issues/250/comments","events_url":"https://api.github.com/repos/pavel-demin/red-pitaya-notes/issues/250/events","html_url":"https://github.com/pavel-demin/red-pitaya-notes/issues/250","id":156445308,"number":250,"title":"VNA Enhancements","user":{"login":"ptamike","id":468135,"avatar_url":"https://avatars.githubusercontent.com/u/468135?v=3","gravatar_id":"","url":"https://api.github.com/users/ptamike","html_url":"https://github.com/ptamike","followers_url":"https://api.github.com/users/ptamike/followers","following_url":"https://api.github.com/users/ptamike/following{/other_user}","gists_url":"https://api.github.com/users/ptamike/gists{/gist_id}","starred_url":"https://api.github.com/users/ptamike/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ptamike/subscriptions","organizations_url":"https://api.github.com/users/ptamike/orgs","repos_url":"https://api.github.com/users/ptamike/repos","events_url":"https://api.github.com/users/ptamike/events{/privacy}","received_events_url":"https://api.github.com/users/ptamike/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":17,"created_at":"2016-05-24T08:11:58Z","updated_at":"2016-06-07T15:00:21Z","closed_at":null,"body":"I've been testing the VNA with a resistive series fixture and also with a Mini-Circuits ZFBDC20-6HP+ directional coupler and the results have been very encouraging. The series fixture in particular works very well.\r\n\r\nHowever, when making measurements it would be helpful to have a more detailed readout. I can think of two options but I'm sure there are others:\r\n\r\n1 - A tool-tip box that appears at the mouse pointer with a readout of the exact measurement at the pointer tip.\r\nor\r\n2 - Measurement cursors that can be moved on the display to show precise results.\r\n\r\nThanks,\r\n\r\n\r\nMike\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/pavel-demin/red-pitaya-notes/issues/comments/224308471","html_url":"https://github.com/pavel-demin/red-pitaya-notes/issues/250#issuecomment-224308471","issue_url":"https://api.github.com/repos/pavel-demin/red-pitaya-notes/issues/250","id":224308471,"user":{"login":"ptamike","id":468135,"avatar_url":"https://avatars.githubusercontent.com/u/468135?v=3","gravatar_id":"","url":"https://api.github.com/users/ptamike","html_url":"https://github.com/ptamike","followers_url":"https://api.github.com/users/ptamike/followers","following_url":"https://api.github.com/users/ptamike/following{/other_user}","gists_url":"https://api.github.com/users/ptamike/gists{/gist_id}","starred_url":"https://api.github.com/users/ptamike/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ptamike/subscriptions","organizations_url":"https://api.github.com/users/ptamike/orgs","repos_url":"https://api.github.com/users/ptamike/repos","events_url":"https://api.github.com/users/ptamike/events{/privacy}","received_events_url":"https://api.github.com/users/ptamike/received_events","type":"User","site_admin":false},"created_at":"2016-06-07T15:00:21Z","updated_at":"2016-06-07T15:00:21Z","body":"It's certainly odd. I've just done a VSWR run with the DG8SAQ looking into the reflectance bridge and as you can see, it's providing a pretty flat load from 1MHz through to 60MHz so you would expect the Red Pitaya to see that as a good 50R load.\r\n**Trace 1 - 3-bead Reflectance Bridge input matching**\r\n![reflectance bridge input](https://cloud.githubusercontent.com/assets/468135/15862615/24f18d34-2cc8-11e6-8ed3-2da3cbc2e22c.png)\r\nI'll do some more investigations looking into the RP."}}
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