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What is GPS cheap time sync solution?

bobbybobby Member ✭✭
Solution Works great use with bittimesync software connects to usb port of your computer can be attatched to inside window for use. https://www.amazon.com/Waterproof-Nav... Goto lower part of page pick compare to similar when page loads scroll down to tech specs and gives links to manuals and extensive data. Only costs about $25 shipped! Driver assigns it a com port and set the bittimesync software to use gps the comport and 9600 baud.


  • edited December 2018
    Do you have internet full time? If so download Meinberg NTP software (https://www.meinbergglobal.com/english/sw/ntp.htm). This uses the NTP daemon and queries a list, you select, of time servers world wide. I use it for EME
  • bobbybobby Member ✭✭
    edited June 18
    No full time internet thats why I wanted cheap gps solution.
  • N8FNRN8FNR Member ✭✭
    edited January 2019
    What software do you use to get time?
  • George KF2TGeorge KF2T Member ✭✭✭
    edited January 2019
    NMEA Time works with ntp or GPS. Great Windows app.
  • N8FNRN8FNR Member ✭✭
    edited January 2019
  • edited January 2019
    So, I hooked up my Chinese Communist GPS synced 10MHz
    reference to my Flex 6400. ( Many referenced here all seem to have the same insides. ) TX reads 0.9HZ high using my Efratom GPS enabled Rubidium frequency standard as the time base for my counter. Then I reversed and put the Efratom to the Flex and the Chicomm unit to the counter. flex still transmits 0.9 Hz high. If I sync the frequency counter with one reference and count the other it reads 0.0 ( Both output 10 Mhz ) But, when I calibrate the internal Flex TCXO at 15MHz the transmit frequency is dead on at 7195.500.0. Any Ideas our there? 
  • edited January 2019
    Tim solved my problem on the Facebook Group.

    Tim Ellison Do you have a TX calibration offset value that is not 0? Disconnect the external clock source and look at the frequency offset. It should be 0 if you are using an external source and the source is dead on 10 MHz. Otherwise, do a frequency calibration with a known frequency reference with the external clock connected.

    My Rb source is about 0.2 Hz high, so I have to you an offset to correct it.

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