Hi
True on the volume and weight. Not as much power as an OCXO since it's passive.
At 1x 2 x 0.5 you could fix the power and weight by using an EMXO. You still
would have more power than the TCXO, but no were near as much as the couple
watts a USO uses.
Bob
Bob
On Sep 1, 2012, at 10:41 PM, J
On 9/1/12 11:00 AM, Bob Camp wrote:
Hi
I suspect that a good IT cut would probably do better than an SC in either
application. In the deep space situation, a copper slug in a dewar sounds like
a reasonable addition to the design.
If you're going to do dewars, then you're talking USOs for wh
Firefox is notorious for screwing up audio in windows. I have had OS of
problems with this. I actually think its something o o with networking.
Sent from my iPad
On Sep 1, 2012, at 5:16 PM, Chuck Forsberg WA7KGX N2469R wrote:
> On 09/01/2012 02:17 PM, Magnus Danielson wrote:
>> On 09/01/2012
On 09/01/2012 02:17 PM, Magnus Danielson wrote:
On 09/01/2012 08:35 AM, Hal Murray wrote:
The context is using the 60 Hz line for timing.
I'm feeding 60 Hz from a wall wart transformer into a modem control
signal
that the kernel PPS stuff watches. Mostly, it works as expected, but
occasional
On 09/01/2012 08:35 AM, Hal Murray wrote:
The context is using the 60 Hz line for timing.
I'm feeding 60 Hz from a wall wart transformer into a modem control signal
that the kernel PPS stuff watches. Mostly, it works as expected, but
occasionally, it picks or drops a cycle.
In order to underst
On 09/01/2012 10:57 PM, J. Forster wrote:
Nope.
The rise/falls are far too fast for anything connected to the grid even if
in the same house. If the thing is on the output of a UPS with a rapidly
switched load, maybe.
Any big loads, even ohmic heaters, have some inductance. I don't see any
such
On 09/01/2012 05:53 PM, Jim Lux wrote:
On 9/1/12 8:32 AM, Bob Camp wrote:
Hi
Observing a curve and being able to compensate it are often two
different things. Hysteresis is one very obvious example. Another is
simple sensor lag. A some what less obvious one is that the
temperature performance i
Nope.
The rise/falls are far too fast for anything connected to the grid even if
in the same house. If the thing is on the output of a UPS with a rapidly
switched load, maybe.
Any big loads, even ohmic heaters, have some inductance. I don't see any
such influence.
Try an oscillator. I suggested
In message , "Bill Hawkins" writes:
>I agree with others that the power company isn't doing this.
Not only are they not, but it also very obvious that the source is nearby,
since high-frequency components suffer very high damping in the grid.
My guess is an electronically switched motor, likely
In the second set it looks like the wrong input is being sampled at
times. Notice the offset is always the same. I have seen this happen a
lot with simple sampling programs. Even if this were real I doubt it
would cause false triggering of the clock. The pulse shown in the first
set would.
Perhaps a dumb question, but the wall wart is plugged into the wall, connected
directly to the grid? You aren't powering the wall wart through a UPS or some
type of inverter?
Tom
Sent from my HTC Inspire™ 4G on AT&T
- Reply message -
From: "Bill Hawkins"
To: "'Discussion of precise t
Hal, where are you taking off the signal to the audio line?
At the low voltage wall wart or at the modem pin? - assuming
there's an isolation or dropping resistor.
I agree with others that the power company isn't doing this.
There would be inductive ringing. Can you confirm with another
wall wart
Hi
I suspect that a good IT cut would probably do better than an SC in either
application. In the deep space situation, a copper slug in a dewar sounds like
a reasonable addition to the design.
Bob
On Sep 1, 2012, at 11:53 AM, Jim Lux wrote:
> On 9/1/12 8:32 AM, Bob Camp wrote:
>> Hi
>>
>>
On 9/1/12 8:32 AM, Bob Camp wrote:
Hi
Observing a curve and being able to compensate it are often two different
things. Hysteresis is one very obvious example. Another is simple sensor lag. A
some what less obvious one is that the temperature performance is also
influenced by the rate of chan
Hi
Observing a curve and being able to compensate it are often two different
things. Hysteresis is one very obvious example. Another is simple sensor lag. A
some what less obvious one is that the temperature performance is also
influenced by the rate of change in temperature.
Here's another th
On 9/1/12 6:56 AM, Arthur Dent wrote:
IMO, you have an instrumentation issue. I don't think the power grid can
do anything like that.
YMMV,
-John
I agree. If this was happening on the grid by the time this blip had
traveled down the line to you it would have been so filtered through
transfor
I think monitoring a signal generator was the best idea presented. You always
need a baseline (sanity) test in any experiment.
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> IMO, you have an instrumentation issue. I don't think the power grid can
> do anything like that.
>
> YMMV,
>
> -John
I agree. If this was happening on the grid by the time this blip had
traveled down the line to you it would have been so filtered through
transformers and other devices and yo
I concur with John, the grid doesn't do that. To me it looks like line noise
and/or a software issue is causing your setup to give false results.I have
seen a lot of instrumentation get fooled by line noise, especially around zero
crossings. Measuring the power line accurately in the prese
> More... OOPS
>
> You might try logging the output of an audio oscillator, Even an HP 200
> would work.
>
> -John
>
> =
>
>
>> I agree: I don't think this is possible on a power line. Better to use a
>> second sampling unit to check.
>>
>> On Sat, Sep 1, 2012 at 3:30 PM, J. Forster
More...
You might try logging the output of an audio oscillator, Even an HP 20
would work.
-John
=
> I agree: I don't think this is possible on a power line. Better to use a
> second sampling unit to check.
>
> On Sat, Sep 1, 2012 at 3:30 PM, J. Forster wrote:
>
>> IMO, you ha
I'd try to beg or borrow a line dsturbance monitor. To me, it looks like a
SW issue, BTW. Perhaps something like an interrupt service routine crock.
FWIW,
-John
==
> I agree: I don't think this is possible on a power line. Better to use a
> second sampling unit to check.
>
> On Sat
I agree: I don't think this is possible on a power line. Better to use a
second sampling unit to check.
On Sat, Sep 1, 2012 at 3:30 PM, J. Forster wrote:
> IMO, you have an instrumentation issue. I don't think the power grid can
> do anything like that.
>
> YMMV,
>
> -John
>
> ===
>
IMO, you have an instrumentation issue. I don't think the power grid can
do anything like that.
YMMV,
-John
===
> The context is using the 60 Hz line for timing.
>
> I'm feeding 60 Hz from a wall wart transformer into a modem control signal
> that the kernel PPS stuff watches. Mo
On 8/31/12 11:35 PM, Hal Murray wrote:
The context is using the 60 Hz line for timing.
I'm feeding 60 Hz from a wall wart transformer into a modem control signal
that the kernel PPS stuff watches. Mostly, it works as expected, but
occasionally, it picks or drops a cycle.
In order to understand
I think 50% is the employee discount, at least back in the day.
I worked at a company that was one of the early users of Silvaco. The founder,
Ivan Pesic, bought all the gear for his start up at employee discount, then
started a company competing with HP TECAP. He got the network analyzer, the
On 1 September 2012 02:42, Said Jackson wrote:
> You could get our GPSTCXO eval kit.
>
> It has a uBlox gps, supports NMEA GGA and RMC messages, has on-board USB, and
> outputs a disciplined 10MHz with reasonably good phase noise. Two flies
> captured in one.
>
> Probably costs only as much as s
On 1 September 2012 00:00, Kevin Rosenberg wrote:
> On Aug 31, 2012, at 4:05 PM, David Kirkby wrote:
>> I don't have it yet, but bought it on eBay today from the seller
>> "agilentused" which is Agilent, and sells used/ex-demo units which
>> have been reconditioned, and have a fully warranty. Sin
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