Hi
They are after good ADEV out to the point that the loop bandwidth lets the gas
cell take over. In some cases that can be a bit further out than others.
Bob
On Aug 27, 2013, at 10:09 PM, Ed Palmer ed_pal...@sasktel.net wrote:
Yes, in many of the more recent Rb standards you're lucky if the
Hi
The OCXO in most Rb's isn't all that great. They are after good ADEV, but
tempco and aging aren't terribly important.
Bob
On Aug 26, 2013, at 1:34 PM, Nathaniel Bezanson mys...@telcodata.us wrote:
At room temperature, mine takes about 3-4 minutes heating until the lamp will
start.
Yes, in many of the more recent Rb standards you're lucky if the crystal
is ovenized at all. But are you sure that they're after good ADEV? I
get the impression that the only thing they're interested in is low
drift for the unit (e.g. for holdover purposes) since they're intended
to be
At room temperature, mine takes about 3-4 minutes heating until the lamp will
start. You'll see RbMon showing SD2 and AD4 at max values, then they'll settle
back into something sensible once it lights up. After that, you're watching the
DS signal values and hoping the (large, small) turns into
Use the RbMon utility to monitor the unit's operation as it starts up to
confirm that the lamp is started and the photocell is detecting a signal.
Not long ago there were a number of units available for sale on Ebay
that appeared to have a lamp problem.
On 23/08/2013 02:10, Paul wrote:
As I
Hi
Pretty much all of the small Rb's that I have seen (LPRO, FE 56xx's, PRS-10's)
lock up in under 10 minutes if they are running properly at room temperature.
Most system level specs seem to want them to be doing something in under 10
minutes. They are fairly far off at lock, but converge to
Paul,
The datasheet says it should lock in under 6 minutes.
You may have the lamp assy problems that have been posted before.
Corby
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Hi Paul:
Use the Rb monitor program to check to see if the unit is in the mode to lock.
There's another mode where the Rb is free running and the 1PPS is time stamped.
If in this mode there's no lock.
Have Fun,
Brooke Clarke
http://www.PRC68.com
Use the RbMon utility to monitor the unit's operation as it starts up to
confirm that the lamp is started and the photocell is detecting a signal.
I'm not at all clear how to interpret the output but I think having
the FET voltage stuck on 255 means the lamp isn't igniting.
It also reports
As I patiently wait for my PRS10 to lock I'm curious if there's a
limit beyond which I should assume the unit is faulty.
It does produce abount 10MHz (+- .2 Hz) and the oven current dropped
at what I assume is operating temperature.
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time-nuts
I can't directly speak to a PRS 10 but from the hp 5065 to FE's and FRS
20-40 minutes would be typical. The newer smaller ones seem to be within 20
minutes. They are below .2 Hz when locked.
Regards
Paul
WB8TSL/1
On Thu, Aug 22, 2013 at 9:10 PM, Paul tic-...@bodosom.net wrote:
As I patiently
Paul, i think 8 min is stated somewhere...
Sent From iPhone
On Aug 22, 2013, at 18:10, Paul tic-...@bodosom.net wrote:
As I patiently wait for my PRS10 to lock I'm curious if there's a
limit beyond which I should assume the unit is faulty.
It does produce abount 10MHz (+- .2 Hz) and the
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