Hi,
I had a play with mine last night. It's far from conclusive but as far
as I could tell the three switches have the following effect.
Sw1 off = leading zeros shown, on = leading zeros blanked
Sw2 off = normal operation, on = display test.
Sw3 Unknown, no effect on IRIG B but did cause a change
Hi Brooke,
with this specs Stanford Research says: The sheer numerical resolution
that the SR620 can display/signalize using IEEE488 is 1 ps. In addition
the counter shows a 1 sigma 20 ps noise from measurement to measurement
due to a lot of different effects in the inside electronics. In this
In message [EMAIL PROTECTED], Ulrich Bangert writes:
Having these specs at hand you don't need to make a single measurement
to determine the TIC's Allan plot: It will be a straight line starting
at 2E-11 @ 1 s and having a slope of -1.
Not quite.
2E-11 is the spec, the counter is likely to do
From: Poul-Henning Kamp [EMAIL PROTECTED]
Subject: Re: [time-nuts] Using Allan Plots, was(LPRO-101 with Brooks Shera's
GPS locking circuit)
Date: Mon, 18 Dec 2006 09:58:47 +
Message-ID: [EMAIL PROTECTED]
In message [EMAIL PROTECTED], Ulrich Bangert writes:
Having these specs at hand you
In message [EMAIL PROTECTED], Magnus Danielson wri
tes:
The quickest way to disclose crosstalk as an issue is to
have two stable sources be near beating while logging the timings. One of these
may be the time-base.
I have used such a vernier setup to measure stuff in the FreeBSD kernel
and once
From: Poul-Henning Kamp [EMAIL PROTECTED]
Subject: Re: [time-nuts] Using Allan Plots, was(LPRO-101 with Brooks Shera's
GPS locking circuit)
Date: Mon, 18 Dec 2006 11:09:42 +
Message-ID: [EMAIL PROTECTED]
In message [EMAIL PROTECTED], Magnus Danielson wri
tes:
The quickest way to
Hi
about Japanese to English translation.
Please try to following translation web site.
http://www.excite.co.jp/world/
It translate Japanese to English and English to Japanese.
Right windows is translate 'from' and left windows is 'to',center selectable
list window was lower is Japanese to
Magnus,
The oscillator should not be moving too much as the M12M has a TCXO
instead of the crystals used on the earlier models. The TCXO is actually
much more stable under temperature changes, but it will react a little
to a step change such as putting your finger on it. It should drift off
a
From: Randy Warner [EMAIL PROTECTED]
Subject: Re: [time-nuts] iLotus M12M Timing receiver
Date: Mon, 18 Dec 2006 08:53:48 -0800
Message-ID: [EMAIL PROTECTED]
Magnus,
Randy,
The oscillator should not be moving too much as the M12M has a TCXO
instead of the crystals used on the earlier models.
12-18-06
Is it possible to lock a 10ghz gunn diode transceiver (supply voltage 10.00
vdc) to a 10 mhz standard? Signal applied to either gunn diode or varactor
supply voltages.
Rick
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Rick,
If you are talking about injection locking, that will probably not be
practical. The Gunn is not stable enough (not the Gunn itself, but the
cavity where it will be installed) to stay close enough to the right
harmonic to stay locked, and the high order difference between the gunn
and
Dave et al,
Be very careful trying to apply +12V to a GPS antenna. Connector type
does not matter. About the only timing antennas I have seen that accept
a 12V input voltage are the timing antennas from Micropulse (now
Andrew). They are typically rated for 5-26V. This makes it easier to use
them
I agree that injection locking may not be ideal, but mainly because it's not
that hard to do the job with an actual PLL. Here's an example of a
quick-and-dirty Gunnplexer hack with an Analog Devices PLL chip and a
Hittite prescaler: http://www.ke5fx.com/gunnpll.html . Close-in spectral
purity
At 5:11 PM + 12/18/06, [EMAIL PROTECTED] wrote:
12-18-06
Is it possible to lock a 10ghz gunn diode transceiver (supply
voltage 10.00 vdc) to a 10 mhz standard? Signal applied to either
gunn diode or varactor supply voltages.
Rick
Rick,
Sure it's possible. I work on radiotelescopes that
Hi Bob,
thanks for the specs!!
For some reason this unit is slightly different though in it's specs:
It only uses +24V, no negative input provided by the Wavecrest PS. If you
are right, the -5.2V is only applied to the output to bias it, which is not
needed. The -5.2V pin is left
Some time ago, i've found documentation on microwave
prescalers, (from Hewlett-Packard/Agilent) that could
count up to 18 GHz.
Tonight, i've found those SiGe prescalers from NEC:
µPB1510GV .5-3 GHz div. by 4 prescaler:
http://www.ncsd.necel.com/microwave/english/pdf/PU10311EJ01V0DS.pdf
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