For more than a year I have been accumulating parts to build a GPS disciplined 10 Mhz frequency standard. The goal of that is to have a high quality frequency source that I can pump into my oscilloscope, frequency counter and various other gizmos. <\/p>\n
I have been thinking about this type of project for a long time. When I lived in Colorado I had tried to get WWV 10Mhz off of groundwave from their site north of Ft. Collins. My electronics skills were not up to the task.<\/p>\n
This most recent effort is nearly complete. A year ago I bought a Trimble Resolution-T GPS card from a guy at the Jackson, MS hamfest. I also bought an old HP counter which had their high stability ovenized crystal oscillator off of e-bay (cheaper than buying just the oscillator!). I built a controller board which I purchased from VE2ZAZ (a ham in Canada), purchased the parts and got that all ready. The only hold up now is building power supplies for +24, +12 +5 +3 and -5 volts. I have the parts for all but the -5. Somehow I just have not gotten that done. I have an enclosure.<\/p>\n
Why is it so hard to get that last little bit completed?<\/p>\n
You may be asking, “What is a GPS disciplined oscillator?” GPS receivers get timing data from the GPS satellites. Certain kinds of GPS receivers are made to then put out a 1 pps (pulse per second) timing signal. Taking that 1 pps signal and a stable crystal oscillator, you “discipline” the crystal oscillator by doing a long term count of oscillator transitions over a hundred or a thousand seconds and adjust the crystal oscillator using its built in voltage control pins. When it is working and locked to the GPS, such an oscillator can produce a steady signal for use as a laboratory standard. The VE2ZAZ controller board uses a PIC microcontroller to manage the integration of the GPS and oscillator, and it has a handful of output ports for connection to lab devices.<\/p>\n","protected":false},"excerpt":{"rendered":"
For more than a year I have been accumulating parts to build a GPS disciplined 10 Mhz frequency standard. The goal of that is to have a high quality frequency source that I can pump into my oscilloscope, frequency counter and various other gizmos. I have been thinking about this type of project for a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-98","post","type-post","status-publish","format-standard","hentry","category-ham-radio"],"_links":{"self":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/98","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=98"}],"version-history":[{"count":4,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/98\/revisions"}],"predecessor-version":[{"id":110,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/98\/revisions\/110"}],"wp:attachment":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=98"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=98"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=98"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}