Hi
I am keen to measure close in phase noise 1Hz to 1 MHz offset on 100 MHz
clocks.
The approach detailed by John Miles in his 2010 presentation using PN.exe, a
mixer and an AD7660 looks suitable.
I have searched the posts on this but am still unsure of how to transfer the
data to PN.exe. I can
I once read that Supercapacitors come up short in handling really short
spikes,
and that this is not due to physical inductance arising from the
structure. Rather,
the issue was of a subtle (to me) electrochemical nature.
Can anyone either confirm or refute this? Inquiring minds want to know.
Hi
Indeed, the unit seems to work fine without batteries.
---
If filtering and short duration spikes are the concern, one could
replace the batteries with super capacitors. One would *hope* they
are a bit less likely to create problems. ……
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While it is a good idea to keep OCXO’s on
The 105A was built without a battery. The 105B has a battery and charger.
I have a 105B that had the failed battery removed before I bought it. It
works fine. I have it on a UPS; it survived our just-finished NorCal power
shutdown just fine.
Jeremy
On Fri, Oct 11, 2019 at 7:01 AM Scott McGrath
As one who owns a 105 i had the battery properly rebuilt and basically have it
on low rate charge and periodically discharge the battery
When rebuilding a 105 battery it’s important to replicate its characteristics
Remember HP also intended I believe that the battery would also serve as a
I'd take Taka's suggestions regarding the actual battery and charger
characteristics. A gross over-current means something's wrong, but a
random fuse blowout after many years shouldn't be too surprising either,
presuming everything seems normal otherwise.
If it's not a battery/charger issue,
