It's a GPS receiver that outputs a fixed frequency that is locked to the UTC time standard from the GPS network. It is delivered with software that sets the output to 1MHz but it can be changed to 100kHz, 1MHz (default), 2MHz, 4MHz, 6MHz, 8MHz or 10MHz. After the GPS has received a fix it will output the RF signal on its RF Out connector as a 0 to 3V Square wave. The output signal is very accurate in frequency so it can be used to calibrate or to PLL lock Oscillators etc. Although the primary function is to output this accurate frequency on the SMA connector - there is also a serial port available on the IDC connector that will report the position coordinates and UTC time once it is locked.
The module needs 3,3V to 5V and draws about 50-70mA. An GPS antenna must be connected to the GPS Antenna port, you can buy the module with an indoors GPS antenna that you put next to a window but for best performance use an outdoors antenna with a clear view of the sky.
The Yellow LED will blink while it is acquiring a fix and will lit continuously when a fix have been calculated by the GPS module. The IDC connector is for power input, serial in/out and for RF Output and fix signal, see schematic. Source code available on Github.
To be used as a calibration source for my oscillators
It is very easy to use. Just plug in a GPS antenna and provide power and it will output it's calibration signal after a few seconds. When moved to a new location it can take a bout 2 minutes to get a fix but after the initial fix it is much faster, usually only 2-20 seconds after power on as the fix is stored in battery backuped RAM. All programing of the GPS module is performed at power on by the Arduino Pro Mini that is included. It is possible to extend the software for other applications or to output any Frequency for 1Hz to 10MHz.
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Posten AB: Standard Ground Rate
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I'm a electronics technician with hardware design as my speciality and software as a side line.
My interests and expertise are wide ranging but RF and Radio technology excites me the most.
I started doing electronic design in my own company when I was fresh out of school but after a few years I
became an IT Manager and have been working in the Computer industry for 30+ years at large International Software companies.
So now I'm finally going back to my roots by designing hardware for myself and for the public.
I take on custom jobs if I can fit them in.
My products are aimed to people that want to have an electronics piece to fit in to their project without to much hassle.
I try therefore to have my products pre-programmed and ready to use.
They are for the most part open in hardware and software so you can change them and tweak them.