David Forbes asked:
2. If I have to store the time zone from the user's input, are the
DST calculations reasonably straightforward these days?
It's not too difficult and you get a nice refresher in modulo-7 arithmetic.
I did it in AVR assembler recently although I didn't try to make it
From: Matthew Smith [EMAIL PROTECTED]
Subject: Re: [time-nuts] How best to compute local time from GPS
Date: Tue, 25 Mar 2008 14:11:36 +1030
Message-ID: [EMAIL PROTECTED]
Quoth David Forbes at 2008-03-25 13:37...
...
2. If I have to store the time zone from the user's input, are the
DST
Magnus Danielson wrote:
Quoth David Forbes at 2008-03-25 13:37...
...
2. If I have to store the time zone from the user's input, are the
DST calculations reasonably straightforward these days?
3. What weird time zone operations should it support, such as 15
minute local offsets or
At 11:07 PM 3/24/2008, David Forbes wrote...
2. If I have to store the time zone from the user's input, are the
DST calculations reasonably straightforward these days?
3. What weird time zone operations should it support, such as 15
minute local offsets or oddball DST dates?
4. In general, is it
Hi,
I am continuing my phase noise measurement quest. I gathered
equipment (HP 8662a/11729C/8568B/multipliers) to measure
100Hz+ from the carrier. I now need to get a grip on the
0.1-100Hz range, which is where most of my applications are.
What is the suggested measurement methodology for this
Hi guys,
sorry for the more or less commercial nature of this email.
Wanted to share with you that we have shrunk our Fury GPSDO into a 1 inch x
2.5 inch x 0.5 inch tiny little package, called the FireFly. It's the most
inexpensive new GPSDO that we know of at this time.
It's less than
I am continuing my phase noise measurement quest. I gathered
equipment (HP 8662a/11729C/8568B/multipliers) to measure
100Hz+ from the carrier. I now need to get a grip on the
0.1-100Hz range, which is where most of my applications are.
What is the suggested measurement methodology for this
Fellow clock-confusers,
I learned an important lesson today, while troubleshooting the GPS
receiver module in my Odetics clock for the 5th time. That lesson is
Never assume that you've fixed an intermittent problem the first time.
The second part of the lesson is Never assume the
John Miles wrote:
I am continuing my phase noise measurement quest. I gathered
equipment (HP 8662a/11729C/8568B/multipliers) to measure
100Hz+ from the carrier. I now need to get a grip on the
0.1-100Hz range, which is where most of my applications are.
What is the suggested measurement
Thanks Mike, I'll give it a close look.
Sincere regards,
Marco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike S
Sent: terça-feira, 25 de Março de 2008 1:53
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS and
Hello Joe,
thanks for the feedback and questions! Some other members asked for more
details, I will send out more technical details in the next day or two.
You can make an SNTP time server with the FireFly or Fury GPSDO in two ways:
1) The simple way of doing it:
Connect a PC running
Marco A. Ferra wrote:
Thanks Mike, I'll give it a close look.
Sincere regards,
Marco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike S
Sent: terça-feira, 25 de Março de 2008 1:53
To: Discussion of precise time and frequency measurement
Wenzel has a setup you can purchase at low cost.
http://www.wenzel.com/pdffiles1/PNTS%201000/BP-1000-SC.pdf
Phase noise test sets can be pricey... $200K
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Bruce Griffiths
Sent: Tuesday, March 25, 2008 5:43
Shane wrote:
Wenzel has a setup you can purchase at low cost.
http://www.wenzel.com/pdffiles1/PNTS%201000/BP-1000-SC.pdf
Phase noise test sets can be pricey... $200K
Shane
Their calibration method is somewhat problematic at the low frequency
end where the effect of the PLL and the
Do you know much about the RS FSUP50?
http://www2.rohde-schwarz.com/en/products/test_and_measurement/product_categ
ories/spectrum_analysis/FSUP-%7C-Key_Facts-%7C-4-%7C-966.html
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Bruce Griffiths
Sent:
Most, but not all, sound cards have a low frequency cutoff of 20Hz or so.
Some (but not all) sound card ADCs can dc coupled.
A high resolution dc coupled ADC may be more effective for frequencies
below 20Hz.
True; I'm assuming that anyone using a sound card for these purposes is
either going
John Miles wrote:
Most, but not all, sound cards have a low frequency cutoff of 20Hz or so.
Some (but not all) sound card ADCs can dc coupled.
A high resolution dc coupled ADC may be more effective for frequencies
below 20Hz.
True; I'm assuming that anyone using a sound card for these
Shane wrote:
Do you know much about the RS FSUP50?
http://www2.rohde-schwarz.com/en/products/test_and_measurement/product_categ
ories/spectrum_analysis/FSUP-%7C-Key_Facts-%7C-4-%7C-966.html
Shane
Only whats specified on the datasheet.
Its performance appears to be several 10's of dB
Shane wrote:
Do you know much about the RS FSUP50?
http://www2.rohde-schwarz.com/en/products/test_and_measurement/product_categ
ories/spectrum_analysis/FSUP-%7C-Key_Facts-%7C-4-%7C-966.html
This is a nice but expensive equipment.
Nice: can do PN measurement by phase quadrature(where you
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