The TICC reference is a HP-5071A cesium beam oscillator with high performance
tube. The GT-87 is connected to the TICC channel B input. The TICC is running
in timestamp mode.
The orange plot is the Time Interval Error of the 1PPS signal... the difference
between 1 second and the measured 1PPS
Those of us with the 1960-vintage HP-113AR/BR Clock/Frequency Divider know how
noisy they are. The mechanical clock movement of my 113AR is loud enough that I
really don't want to be in the same room with it. I don't know if the clocks
are noisy from brand-new or if the mechanism gets noisier as
Jeremy
I have heard about the old movements in time-nuts. Kind of a reason to stay
clear of them for me at least.
Thought they are amazing pieces of equipment, I have 4 clocks on the wall
that have impulse motors. Though not loud you certainly can here the steps
every second.
Sounds like you have s
So the orange is the second to second timestamp difference minus 1s, or the
period time measured every second minus 1s. As the period is very close to 1s
the frequency difference just will be the negative value so what the graph
shows is the same as eg Stable 32’s frequency data for 1s but negat
There is a small, about 3.5" by 4.5", GPSDO board being offered by several
sellers on eBay. I bought one from what looks to be the only US based
source. It is identified as True Position, Inc., and had a small CTS OCXO
and Furuno GT8031 on board. I found hook up information in one of the Asian
vend
Reviving the conversation about superb voltage regulators, I am looking
for one to run the analog and PLL bits of a high performance frequency
synthesizer chip.
The current drain looks to be about 160-180 mA at 1.8 V, which is
uncomfortably close to the limit for the LT3042 (200 mA). The
man
The magic word is $PROCEED.
There is quite a bit of info about these on eevblog.com
https://www.eevblog.com/forum/projects/gpsdo-loss-of-satellitesfix-troubleshooting/
Lady Heather v6 Beta supports these. If you have v5 installed from ke5fx.com,
you can get the .exe for v6 from here or if you
Use an LT3045, its the 0.5A version of the LT3042.
Bruce
> On 19 March 2018 at 09:13 John Ackermann N8UR wrote:
>
>
> Reviving the conversation about superb voltage regulators, I am looking
> for one to run the analog and PLL bits of a high performance frequency
> synthesizer chip.
>
> The c
- Original Message -
From: "John Ackermann N8UR"
To: "Discussion of precise time and frequency measurement"
Sent: Sunday, March 18, 2018 4:13 PM
Subject: [time-nuts] ULN regulator with more current capability than LT3042?
Reviving the conversation about superb voltage regulators, I
Thanks, Bruce!!!
On 03/18/2018 04:19 PM, Bruce Griffiths wrote:
Use an LT3045, its the 0.5A version of the LT3042.
Bruce
On 19 March 2018 at 09:13 John Ackermann N8UR wrote:
Reviving the conversation about superb voltage regulators, I am looking
for one to run the analog and PLL bits of a h
Am 18.03.2018 um 21:13 schrieb John Ackermann N8UR:
Reviving the conversation about superb voltage regulators, I am
looking for one to run the analog and PLL bits of a high performance
frequency synthesizer chip.
The current drain looks to be about 160-180 mA at 1.8 V, which is
uncomfortabl
Hi
Getting the heat off of the regulator package may have other benefits ( like
improved
stability). A lot depends on just where the heat goes in each case …..
Bob
> On Mar 18, 2018, at 4:41 PM, Gerhard Hoffmann wrote:
>
>
>
> Am 18.03.2018 um 21:13 schrieb John Ackermann N8UR:
>> Reviving
I don't have one, but I see some Time-nuts posts in 2017 about this
board and communications with it, such as:
https://www.febo.com/pipermail/time-nuts/2017-October/107096.html
https://www.febo.com/pipermail/time-nuts/2017-May/105124.html
I also found:
https://www.eevblog.com/forum/projects/gpsdo
Tom wrote:
Run two in parallel for twice the current and less noise?
This is actually a better solution than using an LT3045, for two
reasons. First, as Tom noted, by paralleling two devices, the noise is
reduced by sqrt 2 = ~1.4:
"Designed as a precision current reference followed by a h
Thanks to all who replied. You pointed me to a wealth of good information.
Seems lately that I have been getting let down in my Google searches. I
didn't find any of the stuff you led me to, but I should have. Hmmm. it may
be because I have been using Ecosia for searches instead of actually using
G
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