millerjs.org

Menu

Menu

  • Blog
  • Email
  • Feed
  • Log in

Pages

  • About
  • TimeHat

Recent Posts

  • Building an End Fed Half…
  • Inexpensive GNSS Signal…
  • Antennas on the Roof
  • Quicksilver PSU Fan…
  • More TimeHats!

Archive

  • December 2023
  • August 2022
  • May 2022
  • August 2021
  • May 2021
  • April 2021
  • March 2021
  • November 2020
  • August 2018
  • July 2018
  • June 2018
  • May 2018
Archive of 2023

August 2022

  • Inexpensive GNSS…

    GNSS receivers, like many other tools and pieces of equipment, have a tendency to replicate. Every time you turn around, there's another friendly timekeeping and position finding device on your desk, ready and waiting for some coax with some fresh GNSS signals. Unfortunately, well positioned antennas do not replicate as quickly as receivers do, so you may end up with windowsills lined with puck antennas - or worse, receivers that aren't doing anything at all! While you, like me, may be able to put one or two antennas in a location that gets excellent sky view (up on your roof or a tower, for instance) choosing which receiver gets to connect directly to it is not an easy decision to make. Thankfully, there is a piece of technology that makes this decision a bit easier. If you read the title of this post, you may know that I'm talking about GNSS signal splitters. These are handy and fairly simple devices that split one antenna signal into two or more, allowing you to connect multiple…

    Permanent link to “Inexpensive GNSS Signal Splitter”

May 2022

  • Antennas on the Roof

    I have been into electronics my whole life, and radio most of it. I got my amateur radio license early in my 20s, and while I haven't been super active on the communication side of things, I do try and keep up with the technology. Sometime in the early 2010s, when it was discovered that cheap USB digital TV receivers could be used as wide band software defined radios, I dug hard into that. Listening in on ham bands, commercial and public safety traffic, pulling down weather satellite images, and decoding aircraft transponders, among other things. I have always been into GPS as well, but only recently did I really dig into it for anything other than positioning. I knew that GPS-disciplined clocks existed, but always assumed that they were well beyond my scope. Receiving and decoding aircraft transponder signals, ADS-B/MLAT has long since been one of my favorite applications of these USB SDRs due to its intersection of radios, aircraft, and GIS. The data coming out of ADS-B systems is…

    Permanent link to “Antennas on the Roof”
Archive of 2021