[time-nuts] Re: Austron Oscillator Products

[john.haine at haine-online.net]

52MHz might have been made for GSM base stations.  The GSM numerology works
out based on a 13MHz oscillator being needed in a handset to generate all
the clock frequencies required.  In a base site a higher frequency could be
useful for the more complex signal processing needed.  IIRC my GSM days
13MHz VCTCXOs were common for handsets - frequency would be locked to
incoming downlink through the "F bursts" so a relaxed spec could be used
(1ppm IIRC).  With GSM precise locking between base stations wasn't so
critical, whereas with CDMA using soft handover and more recent standards it
becomes essential hence the use of GPS.

-	John