Since I had it out, I decided to let it run and this morning
I measured the EFC characteristic.
In my case perfect frequency is at 4.025V and the sensitivity
is 0.2317 PPM/Volt so the design EFC range is probably +/- 1PPM
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org
The specs that I found here:
http://web.archive.org/web/20010302193035/http://www.isotemp.com/ocxo107.htm
say the electrical EFC range is 0.1 PPM, but that's for the version
with the D/A converter. I can't find any hint about our version.
My unit is starting to settle down. Yesterday
Hi Bob,
On 12/03/14 19:26, Bob Stewart wrote:
Hi Magnus,
Thanks very much for this response! It will be very easy to add the
exponential averager to my code and do a comparison to the moving average. I
have no experience with PI/PID. I'll have to look over the literature I have
on them
On 12/03/14 20:25, Hal Murray wrote:
mag...@rubidium.dyndns.org said:
Exponential averger takes much less memory. Consider this code:
x_avg = x_avg + (x - x_avg) * a_avg;
Where a_avg is the time-constant control parameter.
Also note that if a_avg is a power of 2, you can do it all with
Hi Bob,
On 12/03/14 23:16, Bob Stewart wrote:
x_avg = x_avg + (x - x_avg) * a_avg;
Hi again Magnus,
In fact, I just post-processed some data using that formula in perl. It looks
great, and will indeed save me code and memory space. And, it can be a user
variable, rather than hard-coded.
On 13/03/14 07:35, Daniel Mendes wrote:
Em 13/03/2014 01:35, Bob Stewart escreveu:
Hi Daniel,
re: FIR vs IIR
I'm not a DSP professional, though I do have an old Smiths, and I've
read some of it. So, could you give me some idea what the FIR vs IIR
question means on a practical level for this
On 13/03/14 13:57, Jim Lux wrote:
On 3/12/14 10:06 PM, Chris Albertson wrote:
On Wed, Mar 12, 2014 at 9:13 PM, Daniel Mendes dmend...@gmail.com
wrote:
This is a FIR x IIR question...
moving average = FIR filter with all N coeficients equalling 1/N
exponential average = using a simple rule to
On 14/03/14 00:39, Bob Camp wrote:
Hi
Either grab a math pack (there are several for the PIC) or go to C.
Timing at the Time Nuts level is about precision. We need *lots* of digits past
the binary point :)
Indeed. Throwing bits at the problems is relatively cheap today.
Besides, you don't
Bob,
Just been reading along, enjoying the conversation...
I've written a lot of hand coded assembly. Some of it very similar to
what you are doing here now. (Although, a different processor family)
I really didn't want to switch to C for anything, since code generated
is 'bloated'.
That being
Hal:
Here's a url for the task-force report:
http://energy.gov/oe/downloads/us-canada-power-system-outage-task-force-final-report-implementation-task-force
I live near Pittsburgh, PA. I think there is ZERO interconnection
between PJM (grid operator we're on) and yours (forgot the name).
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