Im looking for an analog oscilloscope in the 2Ghz+ analog bw range and wonder if you have any experience to share. Im used to the infiniium 54825, but want to go faster (but not spend a fortune on a new one). I've seen a couple of "old" 54846 on ebay, and one recently went for $2800 wich is a price I can handle, but the next price on the list is not that nice. I want to probe LVDS@1-2GHz signals, DVI and ddr3 memory buses at 533Mhz.
Oscilloscope recommendations Ghz range?
Started by ●April 15, 2011
Reply by ●April 15, 20112011-04-15
On 4/15/2011 9:36 PM, Morten Leikvoll wrote:> Im looking for an analog oscilloscope in the 2Ghz+ analog bw range and > wonder if you have any experience to share. Im used to the infiniium 54825, > but want to go faster (but not spend a fortune on a new one). I've seen a > couple of "old" 54846 on ebay, and one recently went for $2800 wich is a > price I can handle, but the next price on the list is not that nice. > I want to probe LVDS@1-2GHz signals, DVI and ddr3 memory buses at 533Mhz. > >Hi Morten, How much is Hyperlynx? HTH, Syms.
Reply by ●April 16, 20112011-04-16
"Symon" <symon_brewer@hotmail.com> wrote in message news:ioalgd$vho$1@dont-email.me...> On 4/15/2011 9:36 PM, Morten Leikvoll wrote: >> Im looking for an analog oscilloscope in the 2Ghz+ analog bw range and >> wonder if you have any experience to share. Im used to the infiniium >> 54825, >> but want to go faster (but not spend a fortune on a new one). I've seen a >> couple of "old" 54846 on ebay, and one recently went for $2800 wich is a >> price I can handle, but the next price on the list is not that nice. >> I want to probe LVDS@1-2GHz signals, DVI and ddr3 memory buses at 533Mhz. >> >> > Hi Morten, > How much is Hyperlynx? > HTH, Syms.More than the cost of a decent scope - and it's only a simulation so garbage in -> garbage out. HTH Phil
Reply by ●April 16, 20112011-04-16
On 4/16/2011 10:37 AM, Phil Jessop wrote:> "Symon"<symon_brewer@hotmail.com> wrote in message > news:ioalgd$vho$1@dont-email.me... >> On 4/15/2011 9:36 PM, Morten Leikvoll wrote: >>> Im looking for an analog oscilloscope in the 2Ghz+ analog bw range and >>> wonder if you have any experience to share. Im used to the infiniium >>> 54825, >>> but want to go faster (but not spend a fortune on a new one). I've seen a >>> couple of "old" 54846 on ebay, and one recently went for $2800 wich is a >>> price I can handle, but the next price on the list is not that nice. >>> I want to probe LVDS@1-2GHz signals, DVI and ddr3 memory buses at 533Mhz. >>> >>> >> Hi Morten, >> How much is Hyperlynx? >> HTH, Syms. > > More than the cost of a decent scope - and it's only a simulation so garbage > in -> garbage out. > > HTH > > Phil > >Hi Phil, Perhaps you can explain how you would use a 'scope to measure the OP's "LVDS@1-2GHz signals"? Thanks, Symon.
Reply by ●April 16, 20112011-04-16
"Symon" <symon_brewer@hotmail.com> wrote in message news:ioc0t1$8h2$1@dont-email.me...> On 4/16/2011 10:37 AM, Phil Jessop wrote: >> "Symon"<symon_brewer@hotmail.com> wrote in message >> news:ioalgd$vho$1@dont-email.me... >>> On 4/15/2011 9:36 PM, Morten Leikvoll wrote: >>>> Im looking for an analog oscilloscope in the 2Ghz+ analog bw range and >>>> wonder if you have any experience to share. Im used to the infiniium >>>> 54825, >>>> but want to go faster (but not spend a fortune on a new one). I've seen >>>> a >>>> couple of "old" 54846 on ebay, and one recently went for $2800 wich is >>>> a >>>> price I can handle, but the next price on the list is not that nice. >>>> I want to probe LVDS@1-2GHz signals, DVI and ddr3 memory buses at >>>> 533Mhz. >>>> >>>> >>> Hi Morten, >>> How much is Hyperlynx? >>> HTH, Syms. >> >> More than the cost of a decent scope - and it's only a simulation so >> garbage >> in -> garbage out. >> >> HTH >> >> Phil >> >> > Hi Phil, > Perhaps you can explain how you would use a 'scope to measure the OP's > "LVDS@1-2GHz signals"? > Thanks, Symon.Hi Symon, ??? Use a 2GHz scope with a differential probe. (Tek P7500 series or similar) Are you new to this game? Thanks Phil
Reply by ●April 16, 20112011-04-16
On 4/16/2011 2:53 PM, Phil Jessop wrote:> "Symon"<symon_brewer@hotmail.com> wrote in message > news:ioc0t1$8h2$1@dont-email.me... >> On 4/16/2011 10:37 AM, Phil Jessop wrote: >>> "Symon"<symon_brewer@hotmail.com> wrote in message >>> news:ioalgd$vho$1@dont-email.me... >>>> On 4/15/2011 9:36 PM, Morten Leikvoll wrote: >>>>> Im looking for an analog oscilloscope in the 2Ghz+ analog bw range and >>>>> wonder if you have any experience to share. Im used to the infiniium >>>>> 54825, >>>>> but want to go faster (but not spend a fortune on a new one). I've seen >>>>> a >>>>> couple of "old" 54846 on ebay, and one recently went for $2800 wich is >>>>> a >>>>> price I can handle, but the next price on the list is not that nice. >>>>> I want to probe LVDS@1-2GHz signals, DVI and ddr3 memory buses at >>>>> 533Mhz. >>>>> >>>>> >>>> Hi Morten, >>>> How much is Hyperlynx? >>>> HTH, Syms. >>> >>> More than the cost of a decent scope - and it's only a simulation so >>> garbage >>> in -> garbage out. >>> >>> HTH >>> >>> Phil >>> >>> >> Hi Phil, >> Perhaps you can explain how you would use a 'scope to measure the OP's >> "LVDS@1-2GHz signals"? >> Thanks, Symon. > > Hi Symon, > > ??? > > Use a 2GHz scope with a differential probe. (Tek P7500 series or similar) > > Are you new to this game? > > Thanks > > Phil > >Hi Phil, Is it true that the signal in the middle of a transmission line may not be the same as it is at the receiver circuitry? Apparently, so I've heard, there can be 'reflections', whatever they are?! These may make the mid-trace measured signal different to the signal at the receiver. Who would've thought it! How would you probe on the input IOBs of the IC's receiver circuit with a differential probe of a Tek P5700 series or similar? Thanks, Symon. p.s. What do you mean by 'new' and 'game'? xx
Reply by ●April 16, 20112011-04-16
"Symon" <symon_brewer@hotmail.com> wrote in message news:iock9m$j6s$1@dont-email.me...> On 4/16/2011 2:53 PM, Phil Jessop wrote: >> "Symon"<symon_brewer@hotmail.com> wrote in message >> news:ioc0t1$8h2$1@dont-email.me... >>> On 4/16/2011 10:37 AM, Phil Jessop wrote: >>>> "Symon"<symon_brewer@hotmail.com> wrote in message >>>> news:ioalgd$vho$1@dont-email.me... >>>>> On 4/15/2011 9:36 PM, Morten Leikvoll wrote: >>>>>> Im looking for an analog oscilloscope in the 2Ghz+ analog bw range >>>>>> and >>>>>> wonder if you have any experience to share. Im used to the infiniium >>>>>> 54825, >>>>>> but want to go faster (but not spend a fortune on a new one). I've >>>>>> seen >>>>>> a >>>>>> couple of "old" 54846 on ebay, and one recently went for $2800 wich >>>>>> is >>>>>> a >>>>>> price I can handle, but the next price on the list is not that nice. >>>>>> I want to probe LVDS@1-2GHz signals, DVI and ddr3 memory buses at >>>>>> 533Mhz. >>>>>> >>>>>> >>>>> Hi Morten, >>>>> How much is Hyperlynx? >>>>> HTH, Syms. >>>> >>>> More than the cost of a decent scope - and it's only a simulation so >>>> garbage >>>> in -> garbage out. >>>> >>>> HTH >>>> >>>> Phil >>>> >>>> >>> Hi Phil, >>> Perhaps you can explain how you would use a 'scope to measure the OP's >>> "LVDS@1-2GHz signals"? >>> Thanks, Symon. >> >> Hi Symon, >> >> ??? >> >> Use a 2GHz scope with a differential probe. (Tek P7500 series or similar) >> >> Are you new to this game? >> >> Thanks >> >> Phil >> >> > Hi Phil, > > Is it true that the signal in the middle of a transmission line may not be > the same as it is at the receiver circuitry? Apparently, so I've heard, > there can be 'reflections', whatever they are?! These may make the > mid-trace measured signal different to the signal at the receiver. Who > would've thought it! > > How would you probe on the input IOBs of the IC's receiver circuit with a > differential probe of a Tek P5700 series or similar? > > Thanks, Symon. > > p.s. What do you mean by 'new' and 'game'? xx >Rookie xxxx
Reply by ●April 18, 20112011-04-18
"Symon" <symon_brewer@hotmail.com> wrote in message news:iock9m$j6s$1@dont-email.me...> How would you probe on the input IOBs of the IC's receiver circuit with a > differential probe of a Tek P5700 series or similar?I would route the lvds signal out to a TP basically.. And maybe even to a LVDS TP if needed.. I also often generate redundant testpoints to check for errors in the logic (buffer under/overflows and similar). This is not ment to be used to check SI, but rather test the logic. Unfortunately simulating what I do has to be limited to smaller blocks, cause the complexity is huge!
Reply by ●April 18, 20112011-04-18
On 4/18/2011 8:37 AM, Morten Leikvoll wrote:> "Symon"<symon_brewer@hotmail.com> wrote in message > news:iock9m$j6s$1@dont-email.me... >> How would you probe on the input IOBs of the IC's receiver circuit with a >> differential probe of a Tek P5700 series or similar? > > I would route the lvds signal out to a TP basically.. And maybe even to a > LVDS TP if needed.. > I also often generate redundant testpoints to check for errors in the logic > (buffer under/overflows and similar). > This is not ment to be used to check SI, but rather test the logic. > Unfortunately simulating what I do has to be limited to smaller blocks, > cause the complexity is huge! > >Hi Morten, Have you considered using something like ChipScope or SignalTap? HTH, Syms.
Reply by ●April 18, 20112011-04-18
"Symon" <symon_brewer@hotmail.com> wrote in message news:ioh0nl$8nq$1@dont-email.me...> On 4/18/2011 8:37 AM, Morten Leikvoll wrote: >> "Symon"<symon_brewer@hotmail.com> wrote in message >> news:iock9m$j6s$1@dont-email.me... >>> How would you probe on the input IOBs of the IC's receiver circuit with >>> a >>> differential probe of a Tek P5700 series or similar? >> >> I would route the lvds signal out to a TP basically.. And maybe even to a >> LVDS TP if needed.. >> I also often generate redundant testpoints to check for errors in the >> logic >> (buffer under/overflows and similar). >> This is not ment to be used to check SI, but rather test the logic. >> Unfortunately simulating what I do has to be limited to smaller blocks, >> cause the complexity is huge! >> >> > Hi Morten, > Have you considered using something like ChipScope or SignalTap? > HTH, Syms.Yes, I have.. They may have their function but what kills it is the limitations. When I used xilinx I was a fan of the FPGA editor and often used it to tap signals and route it to testpoints. Now Im on an Altera project, and I am still looking for a similar simple method to probe, without having to rebuild the entire code. But I'm a bit disappointed that there is no reply to my original Q. Does this mean that not a lot of fpga coders use oscilloscopes any more? (who does?)
