I was slightly imprecise in my previous posting about ubx timing modules
and a few people have raised queries in the list or by email.
What I should have said is that this module is designed as a precise
low-noise /frequency /reference so it directly generates the 30.72 MHz
needed in LTE infrastructure from a GPS disciplined VCTCXO. As I
understand it, the usual 10 MHz output is digitally generated and
jitters, so can't be used as a reference in high performance radio
systems. One could use a phase-locked synth to multiply up from the 1
PPS signal but given the large ratio needed this is prone to generating
its own noise. The M8F does it all internally and is therefore
preferred if what you want is a low noise frequency reference, though
its frequency may not be ideal if for example you wanted 10 MHz - you
could get 10.24 MHz by dividing by 3 but 10 MHz is trickier.
--
John Haine
9 Parkway
Shudy Camps
Cambridge
CB21 4RQ
01799 584773 (T)
07841 322831 (M)
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