Re: [time-nuts] Questions regarding tuning Thunderbolt with Lady Heather -- GPSDO's

2015-01-25 Thread Didier Juges
This operation is very typical of all of the cell site GPSDO’s. The only part that is unique to the TBolt is the ability to fiddle the loop characteristics a bit. And the fact that the GPS's CPU clock is derived from the 10MHz and therefore aligned to the PPS so there is no hanging bridge and

Re: [time-nuts] Questions regarding tuning Thunderbolt with Lady Heather -- GPSDO's

2015-01-25 Thread Bob Camp
Hi On Jan 25, 2015, at 10:59 AM, Didier Juges shali...@gmail.com wrote: This operation is very typical of all of the cell site GPSDO’s. The only part that is unique to the TBolt is the ability to fiddle the loop characteristics a bit. And the fact that the GPS's CPU clock is derived

Re: [time-nuts] Questions regarding tuning Thunderbolt with Lady Heather -- GPSDO's

2015-01-24 Thread Bob Camp
Hi Maybe a bit more information, much of it applies to all GPSDO’s : The TBolt first goes through a process to get the OCXO roughly on frequency and to get the PPS approximately aligned. That process is not impacted by the time constant and damping. The OCXO goes a bit crazy during this