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 application? I can see that the MA is
[Context is maybe(?) withdrawing the proposal to stop keeping time on the US
power line.]
wb4...@wb4gcs.org said:
Since then, large amounts of generation (primarily coal) has been shut
down, so I was not at all surprised by the request.
I missed the announcement that the request was
albertson.ch...@gmail.com said:
We have to define best. I'd define it as the error integrated over time
is minimum. I think PiD gets you that and it is also easy to program and
uses very little memory. Just three values (1) the error, (2) the total of
all errors you've seen (in a perfect
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 make an IIR filter
Isn't his
Hi Jim,
Thanks for your thoughts. Perhaps there are a few things that I know about my
particular system that have been discounted. I have mentioned them in passing,
but haven't collected them coherently for this thread. It's an 8-bit PIC, thus
floating point calculations have to be
On 12 Mar, 2014, at 23:08 , Hal Murray hmur...@megapathdsl.net wrote:
b...@evoria.net said:
In the moving averages I'm doing, I'm saving the last bit to be shifted out
and if it's a 1 (i.e. 0.5) I increase the result by 1.
That's just rounding up at an important place. It's probably a
Dennis,
I just realized that I could do the math in sixteenths. So, for 7/16ths
multiply by 7 before shifting(i.e. dividing) and rounding. That would probably
give enough granularity. I'll have to think about it. It does open new doors.
thanks,
Bob
Jerry Johnson has the following question:
Some of the documents that I have found show pins and feed throughs
with SMB right angle connectors for RF and probably control voltage.
This one doesn't have the SMB connecgtor, just pins. The case says
10544A part number (which I've not
Do you have a photo? I have a large collection of hp oscillators here and do
not see a 10544 with SMB. Are you sure it's not 10811?
Then again, there are 10544A s/n 1528Ax mounted on a 15-pin PCB
(05238-20027) which has a SMB connector.
/tvb (i5s)
On Mar 13, 2014, at 12:44 PM, Mark
You don't really shift so much as just change the way you think about it.
The way to think about it is not that you have 16th but that you have the
binary point force places over. It works just like a decimal point. If
you multiply two numbers each that has four places to the right of the
point
OK, gotcha. But, this is in assembler, and anything wider than 3 bytes becomes
tedious. Also, anything larger than 3 bytes starts using a lot of space in a
hurry. Three byte fields allow me to use 256ths for gain and take the result
directly from the two high order bytes without any
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 :)
Bob
On Mar 13, 2014, at 7:19 PM, Bob Stewart b...@evoria.net wrote:
OK, gotcha. But, this is in assembler, and
I see some C-MAC STP 2390C 10MHZ OCXOs for sale at the normal places for
reasonable prices.
However I am unable to find any data on them, I hate to buy parts and not
have a data sheet for them. Does anyone either know the specs or have a
link to the specs?
Perhaps lack of data is the reason
li...@rtty.us said:
Timing at the Time Nuts level is about precision.
What's the term for a time-nut that's trying to be not-very-nutty?
--
b...@evoria.net said:
includes a 10-bit PWM dithered to 14 bits
When you get it all working, that's going to be one of the weak links, at
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