Electronics > Metrology

Frequency offset between GPS receivers!?

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AndyFl:
A few years ago I came across an issue where several GPS modules (receiver built into antenna unit) were installed near to each other for basestations on a radio network.  They all had problems with stability and sometimes failed to lock reliably.

The solution was to separate the units by at least 2 metres from each other. It appears that they radiated on-frequency signals from the amplifiers (local oscillator?) which caused interference to each other.

Worth bearing in mind if you are comparing units side by side. 

Andy

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