Lifespeed,
The cryogenic amplifiers were used in very broadband situations (often
hundreds of MHz
BW) with "signals" that were basically noise. Most radio astronomy lies in
the art of
measuring very small *changes *in noise level, such as between pointing at
an object of
interest or pointing
> Now, while these measures is performed not on the oscillator itself but
> oscillator and output buffers, unless something is wrong with output
> buffers on either box, the output buffer noise seems to support good
> enough flicker and white noise to support the output of both
> oscillators. Then
-Original Message-
From: time-nuts On Behalf Of Dana Whitlow
Sent: Saturday, January 11, 2020 8:28 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Low Phase Noise Amplifiers
FWIW, at the Arecibo Observatory all our cryogenic LNAs had bias stabilized
-Original Message-
From: time-nuts On Behalf Of Richard (Rick)
Karlquist
Sent: Saturday, January 11, 2020 7:39 AM
To: Discussion of precise time and frequency measurement
; Charles Clark
Subject: Re: [time-nuts] Low Phase Noise Amplifiers
A VERY long time ago, it was discovered
Current Trimble Timing product is the
Accutime 360 multi-GNSS Smart Antenna
https://www.trimble.com/Timing/index.aspx
Trimble Inc
(Embedded Products, In-Vehicle Navigation, Timing)
Sales Manager: Brad Lynch
Charlotte, NC, 28269
United States
Phone: 704-875-0875
Fax: 408-273-6992
URL:
Trimble replacement for EOL and WNRO was discussed here on Time-Nuts, five
years ago (2015). Heol Designs is the solution. I have the Heol Design N024
GPS receiver in my Datum/Symmetricom/Microsemi TymServe 2100.
==
Cheap? TSIP drop-in?
Relative term ... unless you desire a 19” door stop.
Bob Q,
Both of your UCT 108663 oscillators look ok, although the blue plot
seems 2x to 3x worse than the red plot. Neither is strongly correlated
with temperature. It appears that you're using a GPSDO as a testbed so
some of the noise and strange wiggles seen in your plot may be coming
from
Hi,
On 2020-01-12 17:08, Poul-Henning Kamp wrote:
>
> In message <95f82880-6cec-1885-c59e-046ab7a79...@rubidium.se>, Magnus
> Danielson writes:
>
I have a ham friend that is fairly well into batteries as he needs to
for his telecom installations.
>>> LVDC people are much
In message <95f82880-6cec-1885-c59e-046ab7a79...@rubidium.se>, Magnus Danielson
writes:
>>> I have a ham friend that is fairly well into batteries as he needs to
>>> for his telecom installations.
>> LVDC people are much better at this than UPS people, the latter often
>> think that
ntpsec, a fork of the classic NTP distribution, supports an option to
compensate for the 1024 week rollover:
https://docs.ntpsec.org/latest/ntp_conf.html
time1 sec
Specifies a constant to be added to the time offset produced by the driver,
a fixed-point decimal number in seconds. Each "g" on the
Hi,
On 2020-01-11 21:53, Poul-Henning Kamp wrote:
>
> In message <643136da-9599-18ca-be85-ffa62ab04...@rubidium.se>, Magnus
> Danielson writes:
>
>>> I have on my ever-growing TODO list to test if serial-BLE adapters
>>> are any good. Has anybody tried that yet ?
>> My recommendation
Keep in mind that BLE and "classic" Bluetooth are completely different
animals. There is no "serial emulation" with BLE.
If you want to use Bluetooth modules to isolate serial traffic, I recommend
the JDY-30/31 modules. They are a much improved (and cheaper) version of
the HC-05 that you can get
On Sun, Jan 12, 2020 at 3:55 AM Skip Withrow wrote:
>
> I have an NTP server that uses a Trimble GPS receiver (Accutime 2000,
> p/n - 39091-00, ROM 3.06) that has fallen prey to WNRO. Just
> wondering if there are any Trimble (or other brand) receivers that
> have TSIP serial comms that are
Hi Skip,
Are your NTP-server using the Palisade ref clock driver?
http://doc.ntp.org/current-stable/drivers/driver29.html
If it’s using the event-poll mode you might need a receiver supporting that. I
have not seen that outside the Palisade/Accutime family.
Can you fudge the time1 all the
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