Hi all, The cheap ublox GPS modules are used by many LF amateurs as a 1 PPS reference signal source. I see there are NEO-7M modules available at amazon, relatively cheap. Is there any improvement of
Hi Stefan Can the 6M be re-programmed the same as the 7M - as described by Domenico in his post 23 June: -- "in these days, Tony IK1HGI from JN45jj, is transmitting some (not announced) EbNaut test m
Hi Stefan Can the 6M be re-programmed the same as the 7M - as described by Domenico in his post 23 June: Answered my own question from the data sheets (yes - both modules have configurable time pulse
These are incredibly cheap these days! There's little excuse not to run a timing system to open up a whole new realm of weak signal operation, LF and VLF. There's a big green field out there. I use a
Hi all, The cheap ublox GPS modules are used by many LF amateurs as a 1 PPS reference signal source. I see there are NEO-7M modules available at amazon, relatively cheap. Is there any improvement of
Is there any improvement of the Neo-7M over the Neo-6M? [...] the neo-6m can generate up to 999Hz on the timepulse output. this is good for a 1pps timing source for vlfrx-tools (just shorten the tim
I did some measurements on the PPS performance of the ublox LEO-6 GPS http://abelian.org/vlf/tmp/170701a.png I'm using a 29296.875 Hz reference from a GPS disciplined Trimble OCXO, into two independe
I bought a cheap NEO-7N based GPS module, https://www.amazon.co.uk/gp/product/B06XXGJPVM/ It just plugs in and works, and it accepts all the regular UBX commands to set timing pulse width, or set a t
Overnight run, http://abelian.org/vlf/tmp/170711a.gif and here is the mean absolute phase difference plotted over a range of time intervals, http://abelian.org/vlf/tmp/170711b.gif This shows the aver
A longer run measuring the phase of the NEO-7N frequency output, compared with the Trimble. http://abelian.org/vlf/tmp/170714a.gif There are a few spikes, such as this one http://abelian.org/vlf/tmp/
