Hi,
my SDG 1032X, which thinks, it is a 1062X has an issue with syncing to external 10MHz.
FW is the current 1.01.01.33R3.
The 10 MHz signal is at abt. 10dBm sine from my GPSDO.
All is well up to 31MHz gen output.
Above 31MHz, the output frequency is no more accurate and the internal osc of the SDG gives a more accurate output.
Any thoughts on this?
Chris
I have FW1.01.01.33R1 (and least I do not update to more new until there is some real reason. (but new ones from factory come with this more new because it need support some component changes)
Tested using HP53131A.
SDG external reference come from HP reference (in this case HP internal HS Owen option what have low jitter, far better than typical GPSDO's what walks here and there depending its disciplining quality and OCXO/DOCXO quality etc.) (of course GPSDO's long time average is very good). Absolute freq accuracy is here not important at all. Only some stability - if even it.
Ref.Signal level mesured from SDS reference clock input BNC: 1.97Vp-p (used external 50ohm load)
SDG 10MHz reference input specified minimum level is 1.4Vpp.
Sidenote, if I understand right your signal power level can not be 10dBm. Until you have terminated SDG reference input with 50ohm, other ways its impedance is 5kohm and 10dBm mean then 20Vpp sinew. signal. (was just "forced" to say
)
In this test setup SDG signal output to HP signal input. Sinewave 0dBm (50ohm input).
Can not find this kind of error.
What ever freq I take out from SDG, HP tell perfectly same frequency
In this system, displayed error is somewhere around <= 10 - 20 ppt ! (of course also HP 53131A is only what it is - but well enough for this)