First, an explanation of what a GPSDO is: Most oscillators that are used as the frequency reference for a radio will drift over time. If you purchase a radio with a crystal oscillator, a temperature controlled crystal oscillator (TCXO) or an ovenized crystal oscillator (OCXO), you will notice that over time these will drift. An adjustment is required every six to twelve months to keep them on frequency. ALl these crystal oscillators have excellent short term stability but poor long term stability.
The GPS system is designed to keep time very accurately, but at the multi-nanosecond range. Over time, GPS has perfect stability (long term), but in the short term it is a fairly poor reference. A GPSDO combines the best of both of these worlds: It uses a base oscillator with good short-term stability (a TCXO) and then uses a GPS to adjust it over time, or discipline it, to stay on frequency. With a GPSDO you have excellent short and long term stability. The optional GPSDO in the FLEX-6000 Signature Series radios provides both frequency and time information to the radio. The 10MHz output of the GPSDO is used as the reference for the master clock in the FLEX-6000 ensuring the radio is always on frequency. The time information can be used in the future for a number of situations where time information is important in communications and station operation. Steve Stephen Hicks, N5AC VP Engineering FlexRadio Systems™ 4616 W Howard Ln Ste 1-150 Austin, TX 78728 Phone: 512-535-4713 x205 Email: [email protected] Web: www.flexradio.com Click Here for PGP Public Key<https://sites.google.com/a/flex-radio.com/pgp-public-keys/n5ac> *Tune In Excitement™* PowerSDR™ is a trademark of FlexRadio Systems Steve Stephen Hicks, N5AC VP Engineering FlexRadio Systems™ 4616 W Howard Ln Ste 1-150 Austin, TX 78728 Phone: 512-535-4713 x205 Email: [email protected] Web: www.flexradio.com Click Here for PGP Public Key<https://sites.google.com/a/flex-radio.com/pgp-public-keys/n5ac> *Tune In Excitement™* PowerSDR™ is a trademark of FlexRadio Systems On Sat, May 25, 2013 at 6:58 PM, Jim Jerzycke <[email protected]> wrote: > It stands for "GPS Disciplined Oscillator", a method of locking a very > good crystal oscillator to the 1 pulse-per-second output of a GPS receiver. > > 73, Jim KQ6EA > > > On 05/25/2013 09:17 PM, John Molenda wrote: > >> Can someone explain to me please what the GPSDO is for on the 6000 series >> radios . Thanks John Kb2huk >> On 5/25/2013 4:44 PM, Mike Valentine wrote: >> >>> Hi All, >>> >>> As the time approaches for my 6700 with GPSDO to arrive, I'm wondering >>> about the best solution for an outdoor GPS antenna. >>> >>> Any ideas for me? >>> >>> Mike - W8MM - EM79sd >>> >>> ______________________________**_________________ >>> Flexedge mailing list >>> [email protected] >>> http://mail.flex-radio.biz/**mailman/listinfo/flexedge_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz> >>> This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is >>> used for posting topics related to SDR software innovation and other >>> technical SDR topics. >>> >> >> ______________________________**_________________ >> Flexedge mailing list >> [email protected] >> http://mail.flex-radio.biz/**mailman/listinfo/flexedge_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz> >> This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is >> used for posting topics related to SDR software innovation and other >> technical SDR topics. >> >> > > ______________________________**_________________ > Flexedge mailing list > [email protected] > http://mail.flex-radio.biz/**mailman/listinfo/flexedge_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz> > This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is > used for posting topics related to SDR software innovation and other > technical SDR topics. > _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software innovation and other technical SDR topics.
