On 25.07.2014 15:56, Tim Shoppa wrote:
General Radio used to have some common values of capacitances available in
"terminator" type configuration and "passthru"/"bulkhead" type
configuration. These were moderately useful doing some bridge-type
measurements. I remember blowing one up once, and ta
On 25.07.2014 20:07, Charles Steinmetz wrote:
Stefan wrote:
shield side of the coax goes to ground through a 0.1uF cap.
For optimum results with respect to high RF frequencies, I'd expect
that you would need this cap to be annular, so that the cable can pass
through the middle, and the outsid
On 24.07.2014 18:00, Ackermann, John R wrote:
Just FWIW, the TADD-1 uses transformers to provide DC isolation, but the
shield side of the coax goes to ground through a 0.1uF cap. The hope is
that this reduces the issue that John's referring to (and which I've
seen plenty of times using baluns).
A great loss and a sad story, indeed.
That leaves me wondering what will happen to his software tools, which
we have grown accustomed to using. I'm not aware that he disclosed the
sources. Has anybody got access to them and can take care of them? Or
will all this good work fade away?
Cheers
paul swed wrote:
I can't believe you found the transistor. When I pulled it out last night,
its actually a MPSA18!!! I had not had time to look it up but figured it
was a ebay leftover hunt. :-)
At that price I may order 20 of them. Like the gain.
Toshiba used to make a transistor with even high
Jim Lux wrote:
On 7/10/13 12:29 PM, Didier Juges wrote:
Jim said:
"It's like a HP 8663B (not the modern Agilent E8663).. very low noise,"
The Agilent E8663 has similar SSB phase noise spec as the older HP 8662A
(-144dBc/Hz @ 10 kHz with option UNY, versus -143 for the 8662). You
seem
to impl
Magnus Danielson wrote:
On 06/13/2013 04:26 PM, Stefan Heinzmann wrote:
Azelio Boriani wrote:
The problem with sampling 'scopes is that you cannot get a continuos
samples stream. I think that the TimePod correlates continuously in
time.
Does that matter for phase noise measurements? Do
Azelio Boriani wrote:
The problem with sampling 'scopes is that you cannot get a continuos
samples stream. I think that the TimePod correlates continuously in
time.
Does that matter for phase noise measurements? Doesn't that just make
the measurement take correspondingly more time?
Cheers
Stef
Marek Peca wrote:
My point was, that DSO is basically an ADC. Therefore, there is some
amount of noise, nonlinearity and drift, limiting the jitter
measurement. Do you think any method can dig more information from
given data than sinc() interpolation and zero-crossing computation?
The cross-
Marek Peca wrote:
(..) I have tried it with a very cheap one, Rigol 2-channel,
originally 50MHz, reflashed to 100MHz. 2 signals, ref&measured, into
Ch1, Ch2. Waveforms (2x500Msps) acquired, sinc() interpolated.
Results: short-term single-shot jitter around 100ps RMS. Long-term
was of no intere
Marek Peca wrote:
Hello,
given that digital scopes have a multichannel ADC for acquisition,
which is similar to what a cross-correlating phase noise measurement
instrument has, it occurred to me that phase noise measurement might
also be possible with a standard digital scope and some
post-p
start with?
Cheers
Stefan Heinzmann
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Can the base stations be interconnected via cable?
In that case, wouldn't it suffice to have the mobile device send an
unmodulated carrier of low enough frequency, and compare the phase
between the receiving base stations, taking the (known) cable delays
into account?
Cheers
Stefan
Rick Ha
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