Hi It would be really interesting to eventually dig up a spec on just what these two boxes are supposed to do. There are far to many “interesting features” for them all to have been un-intentional.
Bob > On Aug 27, 2015, at 5:41 AM, Hal Murray <hmur...@megapathdsl.net> wrote: > > More testing... > I lost everything from roughly 12:00-24:00 UTC Tue and 10:00-20:00 UTC Wed > > > I stumbled into an interesting quirk in the KS-24361. > > Short version: > After it has been in holdover for 5 or 6 minutes, the GPS unit switches to > tracking the non-GPS unit and says it isn't in holdover mode anymore. > > Long story: > I have a program collecting statistics. It was plugged into the unit with > the GPS, aka Secondary. A graph of holdover time didn't make sense. > > The response to ":ROSC:HOLD:DUR?" is something like 3.08000E+002,1 I think > the 1 at the end says it's in holdover mode and the 308 is the number of > seconds it has been in holdover. Graphing holdover shows the ramp I expect > for 5 or 6 minutes. Then it drops out of holdover. It returns to holdover > for a minute or two when I expect it to be recovering. > > Digging deeper, the status page switches from >>> Holdover: GPS 1PPS invalid > to: >>> Recovery: fine freq adj [TI -50.0 ns] 1PPS TI -50.0 ns relative to Ext > and then to >>> Locked to Ext: stabilizing frequency TFOM 3 FFOM > 1 > > The other box, non-GPS, aka Primary, does stay in Holdover. > > -------- > > -------------------------- Secondary Receiver Status > -------------------------- > SYNCHRONIZATION ............................................. [ Outputs Valid > ] > SmartClock Mode ___________________________ Reference Outputs > _______________ >>> Locked to Ext TFOM 3 FFOM > 0 > Recovery 1PPS TI +50.0 ns relative to Ext > Holdover HOLD THR 1.000 us > Power-up Holdover Uncertainty > ____________ > Predict 11.5 us/initial 24 hrs > > ACQUISITION ................................................ [ Ext 1PPS Valid > ] > Tracking: 0 ____ Not Tracking: 10 _______ Time > ____________________________ > PRN El Az PRN El Az UTC 06:40:32 27 Aug > 2015 > * 1 55 270 *31 64 90 GPS 1PPS Invalid: not tracking > * 3 35 310 *32 72 352 ANT DLY 1.000 us > * 4 52 216 Position > ________________________ > *11 37 243 MODE Hold > *14 23 56 > 22 17 114 LAT N 37:26:04.813 > *23 23 260 LON W 122:12:15.762 > 25 10 55 HGT +9.95 m > (GPS) > ELEV MASK 10 deg *attempting to track > HEALTH MONITOR ......................................................... [ OK > ] > Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: > OK > > > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.