> My question exactly. I just talked to someone who uses > SRS PRS10 Rb's, and apparently SRS admitted to him > that the <10s ADEV is fairly bad on the PRS10 units > (without any details).
I very much agree with his report, although it's not like SRS is trying to hide anything. Look again at the PRS10 specs and nice composite ADEV plot at: http://www.thinksrs.com/products/PRS10.htm and see <2e-11 @1s; <1e-11 @10s; <2e-12 @100s So I'm curious what sort of short-term performance you or others are _expecting_ out of a PRS10, or any low-cost, compact, telecom-market Rb standard for that matter? True, Rb have low drift and Cs have no drift but if you want really good short-term stability use an OCXO, or at least a lab-grade rubidium (like an hp 5065A, about ~5x better than PRS10 at 1s). For a GPSDO, Rb has very good price and holdover performance relative to cesium or quartz. And you can use a much longer GPS time constant with Rb or Cs. However, if long-term holdover is not a key spec for you; if you're after exceptional short-term performance, then a high-end OCXO is probably a better choice than a low-end Rb. What makes the PRS10 a really nice unit is the combination of good performance and a huge set of RS232-accessible irresistible functionality. /tvb _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
