3562A ! Cool! I'm am intimately familiar
with that unit, inside and out, from a former
life. Not many of us who have our own personal
unit.
I thought the vector display from the B2D2
looked familiar. (I assumed that you scanned
in the plots? We should talk about easier
ways to do this sometime, if you have an HP-IB
card on your PC)
Now I can rest assured that you have accurate
measurements! ;-)
get your rest!
with that unit, inside and out, from a former
life. Not many of us who have our own personal
unit.
I thought the vector display from the B2D2
looked familiar. (I assumed that you scanned
in the plots? We should talk about easier
ways to do this sometime, if you have an HP-IB
card on your PC)
Now I can rest assured that you have accurate
measurements! ;-)
get your rest!
Personal unit? I assume you mean laptop? Just don't
set the 3562A on top of it or it'll be a "lap tortilla".
The problem with those HP-IB cards is that they were/are
never cheap. I have an old ISA one and keep our old
computer with ISA bus around just for that card. That
and a copy of RMB for windows and you're in engineering
software heaven.
set the 3562A on top of it or it'll be a "lap tortilla".
The problem with those HP-IB cards is that they were/are
never cheap. I have an old ISA one and keep our old
computer with ISA bus around just for that card. That
and a copy of RMB for windows and you're in engineering
software heaven.
"Portable" 3562A -- right, it has carrying handles; thus
luggable by your average gorilla. Mine's out in the storage
room at the moment.
The world's gone mad, Jocko. When I left my previous life
there was still some 'semblence of sanity, but what's befallen
my still-there comrades is not pretty. So the current insanity
is to be preferred.
Yes, products come and go whether we like it or not. As
a DIY'er, I wonder if our days are numbered. Lovely PDIPs
(you could see the legs, you could read the markings, you
could easily handle them) are a thing of the past. SOICs are
OK, I've gotten used to larger-sized SMT components. But
what will the hobbyist do when ANY sort of audio IC is just
a spec of semi-nude silicon with 3-mil solder bumps on it.
Or such high levels of integration that one can't get into
it and kludge in ANY sort of tweak. We'll all be forced to
like tubes just because they'll be the only things we can
physically deal with...
Back to the original topic: You've inspired me to get off
my duff and build up a low-noise regulator for the
very cute little "Guido clock" I have on my desk at work.
Would you like to post your circuit? I've been thinking of
a MAX6250 (??!!) reference, maybe with additional filtering.
I'm a little suspicious of the Wenzel "finnesser" over a large
bandwidth.
Some day upgrades to the Philips 7220/1541 chipset...
luggable by your average gorilla. Mine's out in the storage
room at the moment.
The world's gone mad, Jocko. When I left my previous life
there was still some 'semblence of sanity, but what's befallen
my still-there comrades is not pretty. So the current insanity
is to be preferred.
Yes, products come and go whether we like it or not. As
a DIY'er, I wonder if our days are numbered. Lovely PDIPs
(you could see the legs, you could read the markings, you
could easily handle them) are a thing of the past. SOICs are
OK, I've gotten used to larger-sized SMT components. But
what will the hobbyist do when ANY sort of audio IC is just
a spec of semi-nude silicon with 3-mil solder bumps on it.
Or such high levels of integration that one can't get into
it and kludge in ANY sort of tweak. We'll all be forced to
like tubes just because they'll be the only things we can
physically deal with...
Back to the original topic: You've inspired me to get off
my duff and build up a low-noise regulator for the
very cute little "Guido clock" I have on my desk at work.
Would you like to post your circuit? I've been thinking of
a MAX6250 (??!!) reference, maybe with additional filtering.
I'm a little suspicious of the Wenzel "finnesser" over a large
bandwidth.
Some day upgrades to the Philips 7220/1541 chipset...
When you want to update that chipset.......
You know where to send your money.
"Then I'll have all of Kyle's money........."
Yes, the days are numbered for DIY types. Mainly because we are getting older, our eyes worse, and the parts too damn small to see.
I had two phase noise circuits. The first just used the same DMB for the phase detector and output. The problem that I had was that it was a quadrature lock. And there was less noise with a 0 degree phase errror. So I built a crude digital phase detector.
There are still a few anamolies that need to be worked out. But at least it gets very close to the truth. I do not yet have a way to correlate the amount of phase noise to jitter. Or vice versa.
The circuit for the clock, complete with regualtor, has been posted at one time. There have been minor changes to it that I haven't told you guys about yet.
Jocko
You know where to send your money.
"Then I'll have all of Kyle's money........."
Yes, the days are numbered for DIY types. Mainly because we are getting older, our eyes worse, and the parts too damn small to see.
I had two phase noise circuits. The first just used the same DMB for the phase detector and output. The problem that I had was that it was a quadrature lock. And there was less noise with a 0 degree phase errror. So I built a crude digital phase detector.
There are still a few anamolies that need to be worked out. But at least it gets very close to the truth. I do not yet have a way to correlate the amount of phase noise to jitter. Or vice versa.
The circuit for the clock, complete with regualtor, has been posted at one time. There have been minor changes to it that I haven't told you guys about yet.
Jocko
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