What can be read between the lines:
The recently acquired cash cow isn't working exactly as
expected/advertised. We still don't have a clue when/if the fundamental
(as in physics laws) design (we can't officially blame the cheap Chinese
manufacturer) flaw will be fixed (manufacturer replaced),
You're looking for the older Rockwell/Conexant/Navman Jupiter-T ones.
Some default in Motorola binary compatibility mode, with only 8 channels
visible. Due to scarcity they are getting way to pricey...
You might be better off with the newer uBlox NEO/LEA-6T, with
configurable output(s).
On 2/8
On a later version, the Trimble/Nortel 45k, there are a few obvious HW
differences (lousy Rx, bigger FPGA - XC5204, second Flash EEPROM).
The PWM is generated differentially (better CMR) in the FPGA (output on
pins 12, 13) registered, synchronously with the squared OCXO output
signal to reduce j
It depends what you mean under "professional"... an individual that
pushes buttons for a wage, having no clue about what's actually
happening underneath, or an individual that knows his business in, and out?
The definition in my book is the second one, and I met many "amateurs"
(aka hobbyists, w
ght by GFI, and now landed at Proofpoint.
PS: I don't have any problems with not receiving messages.
On 8/5/2013 9:34 PM, Paul wrote:
Date: Mon, 05 Aug 2013 17:17:37 +0300
From: MailLists
While I'll agree on Spamhaus' decent services, SORBS has definitely a
very shoddy hi
y
yahoo). Windumb, and computer illiterate lusers are the main source of
spam/malware dissemination.
Blocking SMTP connections except to the own MX (with appropriate
filtering before relaying) is current practice.
On 8/5/2013 2:46 PM, James Harrison wrote:
On 05/08/13 11:42, MailLists wrote:
Good
Good luck delisting a DNSBL listed IP (block) from those "crusaders"...
Back some time there was a piss contest between some of those
"blacklists" on which one would blacklist the whole internet faster.
In the mean time different "security" providers bought up some of those
rabid "blacklists" to
Historically U(S)ARTs had the data signals in positive logic, and the
control ones active low - after inversion in the level translators,
signals are in "mark" (-12V) condition for an "inactive" interface.
The threshold being slightly positive in "modern" EIA-232 receivers, is
a "fail-safe" meas
7. RbOs show up on ebay military black market (TM), an ATF sting
operation, hugely overpriced...
8. The war on Rb goes on, hunting for the evil terrorists which
purchased, and intend to use RbOs.
9. Time-n... err. terrorists get a drone visit, with some Hellfires
placed through their chimney
In those tough times, since the General Electric reactors melted down at
Fukushima, and still spewing lots of radiation after more than two
years, a radioactive particle detector is a must have - at least for
gamma radiation.
As for beta particles, you can try visual detection. If you don't see
The cable is a straight DTE-DCE one. BR is 9600 (8O1).
The yellow LED won't go off until it's communicating with the base
station through the rear 110-pin connector.
Is it connected to an on board COM or through an USB adapter?
On COM1 LH 3.10 starts straight without any command line switches or
Actually it's a US-Russian private enterprise (ILS) which is driving the
modernization (read cost-cuttings) of the Proton-M... as they have the
exclusive commercial launch rights. Failures started to add up since 2007.
Guantanamo would be more fitting today.
On 7/2/2013 7:26 PM, brent evers wr
At higher (load) currents, thermal, and parasitic resistance effects are
getting more prevalent, to the limits of monolithic IC technology.
Why don't consider a more classical approach with external pass
transistor (a much larger selection available), if a linear regulator is
really necessary? A
Especially as the inverting gates have independent source and/or drain
connections - series resistors can be used to lower even more the
consumption when biased in the linear region...
On 6/28/2013 7:20 AM, Don Latham wrote:
Maybe the old 4007 cmos would be better...
Don
paul swed
Yes it mak
That's overstretched... eastern chips worked quite well, similarly to
western counterparts. Some faulty prototypes could have been distributed
through the black market, but none would've been incorporated in an
official product. Even the westerners had bugs...
CCCP, and PRL made intel clones, DD
In the eastern block the customary pitch was exactly 2.5mm. At least
SSSR and DDR ICs were made so. For DIP40s it was a little of a stretch
(read pin bending) job to get them fit on .1" spaced boards...
On 6/25/2013 5:09 PM, J. Forster wrote:
It's not 'industry'. It's the international standar
In the classical (transformer -) [bridge] rectifier - storage capacitor
configuration, the capacitor charge current is creating short high peaks
on the current waveform (and therefor truncate the peaks of the voltage
waveform, the distribution circuit resistance being finite), due to the
nonlin
As most PSs for digital circuitry include a regulator, it's output
impedance at 1Hz is low enough to "filter" most out of it - see the load
transient response diagram of the used regulator - as the open loop gain
of the regulator's internal error amplifier at such a low frequency is
practically
Ashihara's tests were with music/voice, taking into account
psychoacoustics, for an average group of music savvy listeners, and even
music professionals.
As uncorrelated jitter is practically raising the noise floor, most of
it was masked by the signal, making it more difficult to detect.
Benja
Hearing tests showed the ability to discern jitter above a few hundred
nanoseconds rms.
http://amorgignitamorem.nl/Audio/Jitter/Detection%20threshold%20for%20distortions%20due%20to%20jitter%20on%20digital%20audio%2026_50.pdf
Others claim the ability to detect jitter in the picoseconds range...
at 16 bits to be significant.
Modern ADCs are MASH. I don't know the analog to the argument for that
technology.
-Original Message-
From: MailLists
Sender: time-nuts-boun...@febo.com
Date: Mon, 07 May 2012 19:31:10
To: Discussion of precise time and frequency measurement
Reply-To: Disc
If you take into consideration that the best currently available DACs,
also true for analog circuits, have a dynamic range about 120-126dB, the
last 3-4 bits are quite irrelevant (random noise mostly)... a good 20bit
DAC already pushes the limits.
The marketingdroids swarming for the newest "32"
Let's expect the ultimate portable MP3 player with atomic clock
reference... >:]
Also funny are the offerings with RbO CD-clocks... usually "tweaked"
FE-5680s, which are not exactly famous for a clean jitter/spurious free
output signal... The only reason is the easiness of output frequency
ad
ly given on the datasheet can be critical for such
applications.
Bruce
MailLists wrote:
I guess you wanted to refer to the old XPLA PZ3k/5k CoolRunner series
bought from Philips, renamed XCR3k/5k, and later enhanced to
XPLA3/XCR3kXL, not the "antique" FPGA family XC3k...
(C)PLDs don'
I guess you wanted to refer to the old XPLA PZ3k/5k CoolRunner series
bought from Philips, renamed XCR3k/5k, and later enhanced to
XPLA3/XCR3kXL, not the "antique" FPGA family XC3k...
(C)PLDs don't need an external memory for configuration storing, it's
internal.
There are also some Lattice, ACT
stuff in the original state. My LPFRS is very rusty so I can drop my "keep
it original" rule.
On Wed, Apr 18, 2012 at 10:29 AM, MailLists wrote:
That would be the tougher part, as, with highest probability, the external
analog adjustment is first AD converted in the MPU (AIN4) summed wit
50 PM, Azelio Boriani wrote:
Interesting... have to check my LPFRS now: only tested for the lock
indicator when received and then put aside to complete first the
"discipliner".
On Thu, Apr 12, 2012 at 5:00 PM, MailLists wrote:
Well, the saga continues...
A replacement part (for which a tho
n the direct and retransmitted signals at the
receiver under test.
David N1HAC
On 4/12/12 10:17 AM, MailLists wrote:
GPS being extremely time-dependent, any delay introduced will affect
positioning precision. Also, the signal is too weak for such an
amplification/echo cancelling signal chain.
Pa
problem I would see in a room that is not fully shielded is
interference between the direct and retransmitted signals at the
receiver under test.
David N1HAC
On 4/12/12 10:17 AM, MailLists wrote:
GPS being extremely time-dependent, any delay introduced will affect
positioning precision. Also, the
On Thu, 12 Apr 2012 17:39:57 +0300
MailLists wrote:
Regarding the TBs, even if they are the only ones directly connected to
the antenna, the cable is already punching through the house Faraday
cage, and chances are quite high that the lightning discharge won't stop
at them.
A house isnt a
it, but after a power cycle the story
repeats... mostly the wrong frequency comes out, but, on the brighter
side, it's locked.
On 3/18/2012 10:26 AM, MailLists wrote:
Yes...
Thank you, and the others, for the suggestions for cleaning/reviving the
unit, but I can't recommend to my frie
A very efficient solution would be to get the signal/power conducting
cables out of the lightning path - that means a GPS receiver near the
antenna, with a local power supply (photo cell panels / buffer
accumulator) and signal transmission over optical fiber. Quite feasible,
as a GPS Rx has low
Only if it's not part of the sacrificial ritual...
On the more serious part, while the lightning processes, and effects are
scientifically researched for ages, an efficient lighting protection
still borders black magic.
On 4/12/2012 5:01 PM, ewkeh...@aol.com wrote:
True if you do not includ
GPS being extremely time-dependent, any delay introduced will affect
positioning precision. Also, the signal is too weak for such an
amplification/echo cancelling signal chain.
Passive relaying, or using at most a simple amplifier with low enough
gain, and short signal delay, remain the only fea
facing interesting.
On a side note, speaking of deterministic systems, why has no one built a GPSDO
with an FPGA yet? Or an NTP server? :)
Bob
On Apr 5, 2012, at 1:15, MailLists wrote:
As a rule of thumb, any general purpose architecture will be less effective at a specific
task than
As a rule of thumb, any general purpose architecture will be less
effective at a specific task than a specially designed one. That applies
more and more to the "modern" way of solving tasks: software.
The PC is one of the classical examples of GPA, and as such it is best
to know its limitations,
now works. I complained with fluke.l and he
refunded
me without asking to ship back the LPFRS.
TIP: handle with extreme care an opened LPFRS, there is a flexible PCB
that
holds the DB9 connector that can tear in the corners.
On Sat, Mar 17, 2012 at 10:59 AM, MailLists wrote:
Hello all,
a f
n but now works. I complained with fluke.l and he refunded
me without asking to ship back the LPFRS.
TIP: handle with extreme care an opened LPFRS, there is a flexible PCB that
holds the DB9 connector that can tear in the corners.
On Sat, Mar 17, 2012 at 10:59 AM, MailLists wrote:
Hello al
Hello all,
a friend purchased from the bay a in the LPRO configuration.
After some problems encountered during the first power ups, he asked for
help - I'm passing the questions further...
After about 9 minutes of warm-up from room temperature (22°C) the lock
signal goes low, but after a shor
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