On 04/16/2013 05:03 AM, JW wrote:> On Mon, 15 Apr 2013 19:37:00 -0700 josephkk <joseph_barrett@sbcglobal.net> > wrote in Message id: <updpm8lf7r1n4ggle7hql9ot0nfkmmp6pd@4ax.com>: > >> On Mon, 15 Apr 2013 19:12:55 +0100, John Devereux <john@devereux.me.uk> >> wrote: >> >>> Cydrome Leader <presence@MUNGEpanix.com> writes: >>> >>>> John Devereux <john@devereux.me.uk> wrote: >>>>> Cydrome Leader <presence@MUNGEpanix.com> writes: >>>>> >>>>>> John Devereux <john@devereux.me.uk> wrote: >>> >>> [...] >>> >>>>> The spectrum analyzer expects to plot to a plotter, so that plot was >>>>> acquired over GPIB, then run through a HPGL to PNG filter. You can tweak >>>>> options to get different resolution and colours / line thicknesses for >>>>> the various elements of the plot. >>>> >>>> Have you used any GPIB to USB converters that function and didn't cost >>>> $500? >>> >>> No, actually. >>> >>>> It seems silly to run out and buy a PCI card for this and be chained to >>>> one desktop forever. >>> >>> Yes, I use a old SFF PC just for that, running a linux distribution. It >>> does all the "GPIB stuff", has scripts to automate various >>> "experiments". It's headless, just a box, but I can remote in to it of >>> course. For the rare times I go "on the road" when I need GPIB I do have >>> a NI USB interface, but it is not quite as reliable. >>> >>> The thing that causes most problems is handling a "screen dump" from the >>> various instruments. I think they all want to be controlling a HP >>> plotter then, instead of being controlled by a GPIB master. I never >>> really got to the bottom of it, but I needed the PCI card to get it to >>> work reliably. >> >> Personally i use the Prologix, LLC devices; nicely better price. Seem to >> work just fine. >> Back in the day i used to be a bit if a GPIB guru. Ask me by PM to >> discuss the instrument to plotter things. We may need to trick the >> interface a bit to read the control words that activate the plotter. >> However they are usually settable in the instrument GPIB menus. Some >> configurations do not need the control words (promiscuous transmit and >> receive). > > I've heard good things about this adapter that is alleged to be 100% > compatible with Agilent's controller. And the price can't be beat. > > http://bmjd.biz/ >I use a Prologix GPIB-Ethernet, connected to a wireless bridge on top of my rack full of boat anchors. Works great, no cables to worry about, just turn it on and forget about it. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
Homemade Wideband Current Transformer
Started by ●April 10, 2013
Reply by ●April 16, 20132013-04-16
Reply by ●April 16, 20132013-04-16
On 4/16/2013 7:09 AM, Phil Hobbs wrote:> On 04/16/2013 05:03 AM, JW wrote: >> On Mon, 15 Apr 2013 19:37:00 -0700 josephkk >> <joseph_barrett@sbcglobal.net> >> wrote in Message id: <updpm8lf7r1n4ggle7hql9ot0nfkmmp6pd@4ax.com>: >> >>> On Mon, 15 Apr 2013 19:12:55 +0100, John Devereux <john@devereux.me.uk> >>> wrote: >>> >>>> Cydrome Leader <presence@MUNGEpanix.com> writes: >>>> >>>>> John Devereux <john@devereux.me.uk> wrote: >>>>>> Cydrome Leader <presence@MUNGEpanix.com> writes: >>>>>> >>>>>>> John Devereux <john@devereux.me.uk> wrote: >>>> >>>> [...] >>>> >>>>>> The spectrum analyzer expects to plot to a plotter, so that plot was >>>>>> acquired over GPIB, then run through a HPGL to PNG filter. You can >>>>>> tweak >>>>>> options to get different resolution and colours / line thicknesses >>>>>> for >>>>>> the various elements of the plot. >>>>> >>>>> Have you used any GPIB to USB converters that function and didn't cost >>>>> $500? >>>> >>>> No, actually. >>>> >>>>> It seems silly to run out and buy a PCI card for this and be >>>>> chained to >>>>> one desktop forever. >>>> >>>> Yes, I use a old SFF PC just for that, running a linux distribution. It >>>> does all the "GPIB stuff", has scripts to automate various >>>> "experiments". It's headless, just a box, but I can remote in to it of >>>> course. For the rare times I go "on the road" when I need GPIB I do >>>> have >>>> a NI USB interface, but it is not quite as reliable. >>>> >>>> The thing that causes most problems is handling a "screen dump" from >>>> the >>>> various instruments. I think they all want to be controlling a HP >>>> plotter then, instead of being controlled by a GPIB master. I never >>>> really got to the bottom of it, but I needed the PCI card to get it to >>>> work reliably. >>> >>> Personally i use the Prologix, LLC devices; nicely better price. Seem to >>> work just fine. >>> Back in the day i used to be a bit if a GPIB guru. Ask me by PM to >>> discuss the instrument to plotter things. We may need to trick the >>> interface a bit to read the control words that activate the plotter. >>> However they are usually settable in the instrument GPIB menus. Some >>> configurations do not need the control words (promiscuous transmit and >>> receive). >> >> I've heard good things about this adapter that is alleged to be 100% >> compatible with Agilent's controller. And the price can't be beat. >> >> http://bmjd.biz/ >> > > I use a Prologix GPIB-Ethernet, connected to a wireless bridge on top of > my rack full of boat anchors. Works great, no cables to worry about, > just turn it on and forget about it. > > Cheers > > Phil Hobbs >GPIB is exceedingly complex. BUT If you have a modern instrument that's programmed in ASCII, it takes zero understanding of the protocol. A PIC processor can easily copy ASCII between RS-232 and GPIB. And you can plug on a RS-232 to USB or Bluetooth adapter and get anywhere you want. Doesn't meet ANY standards. Doesn't look pretty. It ain't fast. But it's cheap, it works and one chip fits in a gender-changer dongle.
Reply by ●April 17, 20132013-04-17
JW <none@dev.null> wrote:> On Mon, 15 Apr 2013 19:37:00 -0700 josephkk <joseph_barrett@sbcglobal.net> > wrote in Message id: <updpm8lf7r1n4ggle7hql9ot0nfkmmp6pd@4ax.com>: > >>On Mon, 15 Apr 2013 19:12:55 +0100, John Devereux <john@devereux.me.uk> >>wrote: >> >>>Cydrome Leader <presence@MUNGEpanix.com> writes: >>> >>>> John Devereux <john@devereux.me.uk> wrote: >>>>> Cydrome Leader <presence@MUNGEpanix.com> writes: >>>>> >>>>>> John Devereux <john@devereux.me.uk> wrote: >>> >>>[...] >>> >>>>> The spectrum analyzer expects to plot to a plotter, so that plot was >>>>> acquired over GPIB, then run through a HPGL to PNG filter. You can tweak >>>>> options to get different resolution and colours / line thicknesses for >>>>> the various elements of the plot. >>>> >>>> Have you used any GPIB to USB converters that function and didn't cost >>>> $500? >>> >>>No, actually. >>> >>>> It seems silly to run out and buy a PCI card for this and be chained to >>>> one desktop forever. >>> >>>Yes, I use a old SFF PC just for that, running a linux distribution. It >>>does all the "GPIB stuff", has scripts to automate various >>>"experiments". It's headless, just a box, but I can remote in to it of >>>course. For the rare times I go "on the road" when I need GPIB I do have >>>a NI USB interface, but it is not quite as reliable. >>> >>>The thing that causes most problems is handling a "screen dump" from the >>>various instruments. I think they all want to be controlling a HP >>>plotter then, instead of being controlled by a GPIB master. I never >>>really got to the bottom of it, but I needed the PCI card to get it to >>>work reliably. >> >>Personally i use the Prologix, LLC devices; nicely better price. Seem to >>work just fine. >>Back in the day i used to be a bit if a GPIB guru. Ask me by PM to >>discuss the instrument to plotter things. We may need to trick the >>interface a bit to read the control words that activate the plotter. >>However they are usually settable in the instrument GPIB menus. Some >>configurations do not need the control words (promiscuous transmit and >>receive). > > I've heard good things about this adapter that is alleged to be 100% > compatible with Agilent's controller. And the price can't be beat. > > http://bmjd.biz/At $80 shipped, it might be worth the gamble.
Reply by ●April 17, 20132013-04-17
Jeroen Belleman <jeroen@nospam.please> wrote:> On 2013-04-16 05:47, Robert Baer wrote: >> Jeroen Belleman wrote: >>> [...] We call them "wall current >>> monitors". Here's a picture, if anyone is interested: >>> <http://cern.ch/psring/psring/showpicture.php?section=03> >>> >>> Jeroen Belleman >>> >> Sadly, the link to the drawing fails. >> > > Yes, I'm not very surprised. It's a php script putting out a > TIFF picture. It has 'header("Content-type: image/tif");' as > the first line producing output. That works fine for Mozilla- > type browsers, but IE doesn't seem to understand it. So I put > in a quick hack that makes it work in-house at least. Of course, > you are outside. > > If you have a suggestion towards a good fix, I'm all ears. > > Jeroen Bellemanit works in IE 9 for me, but you may need to force these headers Content-Type: Coontent-Disposition: for the last one, you'll have to fiddle with forced download options and set a file name, otherwise some browsers will think the file is just file.php also, the behavior in browsers can differ if you click on a link or try to save target as. Saving target as can cause problems.
Reply by ●April 18, 20132013-04-18
On 2013-04-17 22:05, Cydrome Leader wrote:> Jeroen Belleman <jeroen@nospam.please> wrote: >> On 2013-04-16 05:47, Robert Baer wrote: >>> Jeroen Belleman wrote: >>>> [...] We call them "wall current >>>> monitors". Here's a picture, if anyone is interested: >>>> <http://cern.ch/psring/psring/showpicture.php?section=03> >>>> >>>> Jeroen Belleman >>>> >>> Sadly, the link to the drawing fails. >>> >> >> Yes, I'm not very surprised. It's a php script putting out a >> TIFF picture. It has 'header("Content-type: image/tif");' as >> the first line producing output. That works fine for Mozilla- >> type browsers, but IE doesn't seem to understand it. So I put >> in a quick hack that makes it work in-house at least. Of course, >> you are outside. >> >> If you have a suggestion towards a good fix, I'm all ears. >> >> Jeroen Belleman > > it works in IE 9 for me, but you may need to force these headers > > Content-Type: > Coontent-Disposition: > > for the last one, you'll have to fiddle with forced download options and > set a file name, otherwise some browsers will think the file is just > file.php > > also, the behavior in browsers can differ if you click on a link or try to > save target as. Saving target as can cause problems.OK, thanks for the hints. It should work better now. Jeroen Belleman
Reply by ●April 18, 20132013-04-18
Jeroen Belleman <jeroen@nospam.please> wrote:> On 2013-04-17 22:05, Cydrome Leader wrote: >> Jeroen Belleman <jeroen@nospam.please> wrote: >>> On 2013-04-16 05:47, Robert Baer wrote: >>>> Jeroen Belleman wrote: >>>>> [...] We call them "wall current >>>>> monitors". Here's a picture, if anyone is interested: >>>>> <http://cern.ch/psring/psring/showpicture.php?section=03> >>>>> >>>>> Jeroen Belleman >>>>> >>>> Sadly, the link to the drawing fails. >>>> >>> >>> Yes, I'm not very surprised. It's a php script putting out a >>> TIFF picture. It has 'header("Content-type: image/tif");' as >>> the first line producing output. That works fine for Mozilla- >>> type browsers, but IE doesn't seem to understand it. So I put >>> in a quick hack that makes it work in-house at least. Of course, >>> you are outside. >>> >>> If you have a suggestion towards a good fix, I'm all ears. >>> >>> Jeroen Belleman >> >> it works in IE 9 for me, but you may need to force these headers >> >> Content-Type: >> Coontent-Disposition: >> >> for the last one, you'll have to fiddle with forced download options and >> set a file name, otherwise some browsers will think the file is just >> file.php >> >> also, the behavior in browsers can differ if you click on a link or try to >> save target as. Saving target as can cause problems. > > OK, thanks for the hints. It should work better now. > > Jeroen BellemanNo problem. it seems to "pass" some quick tests for making browers know it's a tiff and a file.
