http://inkushi.freeshell.org/screenshot-1351958570177.png
^See? Hence my filing a bug report a few hours ago.
On 11/3/2012 8:54 PM, Brent Gordon wrote:
Reykjavík, Iceland is UTC+0 without summer time changes.
Brent
On 11/3/2012 9:55 AM, Sarah White wrote:
P.S. Seems strange that the
Hi
If you slew rate limit the square wave (which is reality) you get a sin(x)/x
frequency response. It doesn't go to infinity, but the lobes keep going for
quite a while.
Things like cables and connectors have upper frequency limits as well. A square
wave will only be happy with a linear
Hi
Simple - feed it in at the high side of the crystal.
Still easy - pop out the crystal and feed it in there.
More complex - re-wire the base of Q101 so it's detached from all the caps and
crystals. It's now a comm emitter buffer. AC couple the signal in there.
Of course you still have
Hi all,
to avoid more display consumption during long acquisitions, there is
an HPIB command to blank the display on the counter. I have asked to
KE5FX to add this feature in Timelab during the acquisition setup. Hope
he have time to do this.
Luciano
Il 2012-11-02 23:13 John Lofgren ha
I would question the ability to change it. Not familiar with the radio, but
fcontrol feeds back to the 12.8Mhz oscillator by a varicap. If its part of
the pll of the radio then no. If its a RIT control then as mentioned yes.
The RIT will no longer work.
Regards
Paul
WB8TSL
On Sun, Nov 4, 2012 at
Can anyone explain the five day delay in Mr. Gray's mail?
-Original Message-
From: John Ackermann N8UR
Sent: Sunday, November 04, 2012 6:23 AM
Joe, the question is whether the DDS spurs and noise on the FE-5680A are
strong enough to interfere with your measurements. I suspect that in
Several of the large carriers have had all manner of issues due to the storm;
not only network issues but mail servers as well.
Peter
On 11/4/2012 11:02 AM, Bill Hawkins wrote:
Can anyone explain the five day delay in Mr. Gray's mail?
-Original Message-
From: John Ackermann N8UR
I'm not currently a ham. I am interested in Time.
You can learn more about my interests here:
http://www.ecnmag.com/tags/Blogs/M-Simon/
I'm working on some Time projects. When they are done I'll post them to the
list.
Simon
Engineering is the art of making what you want from what you
John,
The radio is on 2M.
Joe Gray
W5JG
On Sun, Nov 4, 2012 at 5:23 AM, John Ackermann N8UR j...@febo.com wrote:
Joe, the question is whether the DDS spurs and noise on the FE-5680A are
strong enough to interfere with your measurements. I suspect that in the
HF/VHF range, you'd probably
On Tue, Oct 30, 2012 at 5:28 PM, Joseph Gray jg...@zianet.com wrote:
Is the programmable FE-5680A suitable to replace the 12.8 MHz
reference in a Midland XTR? If so, where do I feed the rubidium into
the circuit
The long term characteristics of the Rb are very good. But short term a
These are two plots from Dave's NTP plotter program. Nothing strange
happened when we switched back to standard time as far as can tell.
Offset versus date:
http://www.lazygranch.com/temp/ovd.gif
Relative frequency error versus date:
http://www.lazygranch.com/temp/rfvd.gif
Hi Joe,
The reference oscillator is only part of the story. Being a typical FM radio
the normal method is to observe when the carrier is in the center of the
discriminator's bandpass. The particular center point is not a constant, per
se,
because the discriminator is typically adjusted so that
Joseph Gray wrote:
Internet is flaky lately. I'll be brief, as I'm sending this from my
phone.
I don't need timenut accuracy for this. I want to make a setup for
measuring off the air, so local amateurs can have some way to check
a radio.
Using a service
If I use a gpsdo as my reference and feed the same 10MHz into a counter does
that yield the reference independent noise floor of the measuring system? Seems
to me it would look like an ideal reference with respect to the measuring
system. Thanks,
Doc
KX0O
Bill,
This is usually a good idea, since the counter then has both a good short- and
long-term stable/accurate timebase, inherited from the GPSDO. It means the
internal timebase of the counter is no longer a factor in measurement stability
or accuracy. There are exceptions to this, but I'll
I guess what I am saying is if I discipline the counter with 10MHz and then
measure the same 10MHz. Just making sure we are on the same page.
Doc
Sent from my iPad
On Nov 4, 2012, at 10:22 PM, Tom Van Baak t...@leapsecond.com wrote:
Bill,
This is usually a good idea, since the counter
docdai...@gmail.com said:
I guess what I am saying is if I discipline the counter with 10MHz and then
measure the same 10MHz. Just making sure we are on the same page.
The input signal will be at a fixed offset from the reference clock. That
offset will depend on cable lengths.
If that
Hi Tom,
I think you missed the point. He is trying to measure the noise floor of the
counter itself. So what he wants to know is if using the same signal for the
time base and input, would that cancel out the signals contribution to the
noise measurement.
BillWB6BNQ
Tom Van Baak wrote:
Ah, I see what you mean now. Yes, that setup can give you a rough estimate of
the counter's noise floor.
I can't give you specific numbers but one danger with this sort of test is that
the input and the timebase are artificially locked together (i.e. fixed phase
relationship) through the
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