Oh and Mike on the antenna the GPSDO will supply power for an external antenna. I would say that the chief requirement is to get an antenna that will not have issues with RF at your ham station. You wouldn't want to buy one with a preamp that is susceptible to whatever RF level you will have at whatever distance your station antenna(s) will be.
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 Fri, Jun 7, 2013 at 12:28 AM, Stephen Hicks, N5AC <[email protected]>wrote: > 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.
