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2003-11-22 by techy fellow
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2003-11-23 by Alex Gibson
techy fellow wrote: >Hi Guys, > >Can someone pls let me know whether the aforementioned is a good equipment to >invest ? Or I should go for a typical 2 channels Oscilloscopes ? > >Thanks in advance for your help. >Davis > > > What do you need ? What frquency range ? What bandwidth ? What are you going to use it for ? I usually use micros and similar boards up to 100MHz so ended up buying two second hand scopes and a usb based logic analyser. The one I use most of the time a HP 54502A dual channel 400MHz dso. One I use only when I need to debug something higher than 200MHz HP54501 1GHz quad channel scope. Logic analyser great when debugging micros. easy to use and easy to carry. http://www.rockylogic.com/products/ant8.html http://www.rockylogic.com/products/ant8spec.html good for up to around 100MHz. I use this a lot. Windows software only though. Still waiting on them to release their api so you can call it from your own software. What I find is it is usually easier to have equipment that doesn't need a computer. Hit the switch and it is up and running. Can have hassles with usb based equipment especially if other devices your using use the same manufacturers device but with a different driver or different driver version. Alex Gibson
2003-11-23 by techy fellow
Hi Alex, Thanks alot for the info. As I am into MCUs, I need an equipment to help me to test my projects. I will be getting an AVR ICD or ICD2 for PIC. But when comes to testing of circuits, I think I need something more than just ICD. I thought of using a logic analyzer since it is meant for digital circuits. Actually, I am about to build one appeared in Elektor magazine Feb 2003 issue. Top speed is 40 Mhz. Pale in comparison to the one sold by Rocky Logic (500 Mhz). I thought since almost all MCUs is less than 32Mhz (even for ATMega 128), a 40Mhz model should do the job. Why do we need 500 Mhz ? cheers, Davis Alex Gibson <alxx@alxx.net> wrote: techy fellow wrote: >Hi Guys, > >Can someone pls let me know whether the aforementioned is a good equipment to >invest ? Or I should go for a typical 2 channels Oscilloscopes ? > >Thanks in advance for your help. >Davis > > > What do you need ? What frquency range ? What bandwidth ? What are you going to use it for ? I usually use micros and similar boards up to 100MHz so ended up buying two second hand scopes and a usb based logic analyser. The one I use most of the time a HP 54502A dual channel 400MHz dso. One I use only when I need to debug something higher than 200MHz HP54501 1GHz quad channel scope. Logic analyser great when debugging micros. easy to use and easy to carry. http://www.rockylogic.com/products/ant8.html http://www.rockylogic.com/products/ant8spec.html good for up to around 100MHz. I use this a lot. Windows software only though. Still waiting on them to release their api so you can call it from your own software. What I find is it is usually easier to have equipment that doesn't need a computer. Hit the switch and it is up and running. Can have hassles with usb based equipment especially if other devices your using use the same manufacturers device but with a different driver or different driver version. Alex Gibson Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: AVR-Chat-unsubscribe@yahoogroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --------------------------------- Do you Yahoo!? Free Pop-Up Blocker - Get it now
2003-11-24 by fnatmed
--- In AVR-Chat@yahoogroups.com, Alex Gibson <alxx@a...> wrote: > techy fellow wrote: > > >Hi Guys, > > > >Can someone pls let me know whether the aforementioned is a good equipment to > >invest ? Or I should go for a typical 2 channels Oscilloscopes ? > The one I use most of the time a HP 54502A > dual channel 400MHz dso. > > One I use only when I need to debug something > higher than 200MHz HP54501 1GHz quad channel scope. Similar here. I use an HP 54112D quad *color* (woo hoo) digital scope mainly. Great scope - 100MHz bandwidth, but fast-ass (400MSa/s) capture rate and deep memory. I also have an HP 54501a 100MHz scope - smaller, and has nice TV triggering and X vs. Y math. You have the 54501 (no A) and that's a 1GHz scope ? > Logic analyser great when debugging micros. > easy to use and easy to carry. > http://www.rockylogic.com/products/ant8.html > http://www.rockylogic.com/products/ant8spec.html Yeah, I looked at the RockyLogic stuff. I have an older Tek 1241 color logic analyzer, which is very nice. Big and bulky though, only good for the bench. Powerful and friendly to use for an older piece. You can find them on ebay at reasonable prices. Dean.
2003-11-25 by Allan Lane
I have an Ant8 myself, and am very happy with it. 500 MHz means your max sample rate is 2 nS. This means your logic analyzer can tell you when things really happen, +- 2 nS. At 40 MHz, you get +- 25nS -- still pretty good. Sometimes, you want to insure you catch some very transient (ie short) pulses. At 40 MHz, you'll ignore anything shorter than 25 nS. --- In AVR-Chat@yahoogroups.com, techy fellow <techyf@y...> wrote: > Hi Alex, > > Thanks alot for the info. As I am into MCUs, I need an equipment to help me to test my projects. I will be getting an AVR ICD or ICD2 for PIC. But when comes to testing of circuits, I think I need something more than just ICD. > > I thought of using a logic analyzer since it is meant for digital circuits. Actually, I am about to build one appeared in Elektor magazine Feb 2003 issue. Top speed is 40 Mhz. Pale in comparison to the one sold by Rocky Logic (500 Mhz). I thought since almost all MCUs is less than 32Mhz (even for ATMega 128), a 40Mhz model should do the job. Why do we need 500 Mhz ? > > cheers, > Davis > > > Alex Gibson <alxx@a...> wrote: > techy fellow wrote: > > >Hi Guys, > > > >Can someone pls let me know whether the aforementioned is a good equipment to > >invest ? Or I should go for a typical 2 channels Oscilloscopes ? > > > >Thanks in advance for your help. > >Davis > > > > > > > > What do you need ? > > What frquency range ? > What bandwidth ? > > What are you going to use it for ? > > I usually use micros and similar boards up to 100MHz > so ended up buying two second hand scopes and a usb based logic analyser. > > The one I use most of the time a HP 54502A > dual channel 400MHz dso. > > One I use only when I need to debug something > higher than 200MHz HP54501 1GHz quad channel scope. > > Logic analyser great when debugging micros. > easy to use and easy to carry. > http://www.rockylogic.com/products/ant8.html > http://www.rockylogic.com/products/ant8spec.html > good for up to around 100MHz. > I use this a lot. Windows software only though. > Still waiting on them to release their api > so you can call it from your own software. > > What I find is it is usually easier to have equipment that doesn't need > a computer. > Hit the switch and it is up and running. > Can have hassles with usb based equipment especially if other devices > your using use > the same manufacturers device but with a different driver or different > driver version. > > Alex Gibson > > Yahoo! Groups Sponsor > To unsubscribe from this group, send an email to: > AVR-Chat-unsubscribe@yahoogroups.com > > > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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2003-11-26 by techy fellow
Thanks so much for the explanation, Allan. Reeally appreciates it. best rgds, Davis Allan Lane <allan.lane@honeywell-tsi.com> wrote: I have an Ant8 myself, and am very happy with it. 500 MHz means your max sample rate is 2 nS. This means your logic analyzer can tell you when things really happen, +- 2 nS. At 40 MHz, you get +- 25nS -- still pretty good. Sometimes, you want to insure you catch some very transient (ie short) pulses. At 40 MHz, you'll ignore anything shorter than 25 nS. --- In AVR-Chat@yahoogroups.com, techy fellow <techyf@y...> wrote: > Hi Alex, > > Thanks alot for the info. As I am into MCUs, I need an equipment to help me to test my projects. I will be getting an AVR ICD or ICD2 for PIC. But when comes to testing of circuits, I think I need something more than just ICD. > > I thought of using a logic analyzer since it is meant for digital circuits. Actually, I am about to build one appeared in Elektor magazine Feb 2003 issue. Top speed is 40 Mhz. Pale in comparison to the one sold by Rocky Logic (500 Mhz). I thought since almost all MCUs is less than 32Mhz (even for ATMega 128), a 40Mhz model should do the job. Why do we need 500 Mhz ? > > cheers, > Davis > > > Alex Gibson <alxx@a...> wrote: > techy fellow wrote: > > >Hi Guys, > > > >Can someone pls let me know whether the aforementioned is a good equipment to > >invest ? Or I should go for a typical 2 channels Oscilloscopes ? > > > >Thanks in advance for your help. > >Davis > > > > > > > > What do you need ? > > What frquency range ? > What bandwidth ? > > What are you going to use it for ? > > I usually use micros and similar boards up to 100MHz > so ended up buying two second hand scopes and a usb based logic analyser. > > The one I use most of the time a HP 54502A > dual channel 400MHz dso. > > One I use only when I need to debug something > higher than 200MHz HP54501 1GHz quad channel scope. > > Logic analyser great when debugging micros. > easy to use and easy to carry. > http://www.rockylogic.com/products/ant8.html > http://www.rockylogic.com/products/ant8spec.html > good for up to around 100MHz. > I use this a lot. Windows software only though. > Still waiting on them to release their api > so you can call it from your own software. > > What I find is it is usually easier to have equipment that doesn't need > a computer. > Hit the switch and it is up and running. > Can have hassles with usb based equipment especially if other devices > your using use > the same manufacturers device but with a different driver or different > driver version. > > Alex Gibson > > Yahoo! Groups Sponsor > To unsubscribe from this group, send an email to: > AVR-Chat-unsubscribe@yahoogroups.com > > > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. > > > --------------------------------- > Do you Yahoo!? > Free Pop-Up Blocker - Get it now Yahoo! Groups SponsorADVERTISEMENT To unsubscribe from this group, send an email to: AVR-Chat-unsubscribe@yahoogroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --------------------------------- Do you Yahoo!? Free Pop-Up Blocker - Get it now
2003-12-04 by Alex Gibson
fnatmed wrote: >--- In AVR-Chat@yahoogroups.com, Alex Gibson <alxx@a...> wrote: > > >>techy fellow wrote: >> >> >> >>>Hi Guys, >>> >>>Can someone pls let me know whether the aforementioned is a good >>> >>> >equipment to > > >>>invest ? Or I should go for a typical 2 channels Oscilloscopes ? >>> >>> >>The one I use most of the time a HP 54502A >>dual channel 400MHz dso. >> >>One I use only when I need to debug something >>higher than 200MHz HP54501 1GHz quad channel scope. >> >> > >Similar here. I use an HP 54112D quad *color* (woo hoo) digital >scope mainly. Great scope - 100MHz bandwidth, but fast-ass >(400MSa/s) capture rate and deep memory. > >I also have an HP 54501a 100MHz scope - smaller, and has nice TV >triggering and X vs. Y math. You have the 54501 (no A) and that's a >1GHz scope ? > > Sorry should have checked before sending the other message. 541101D , don't use it much. Also its fans are very noisy. >>Logic analyser great when debugging micros. >>easy to use and easy to carry. >>http://www.rockylogic.com/products/ant8.html >>http://www.rockylogic.com/products/ant8spec.html >> >> > >Yeah, I looked at the RockyLogic stuff. I have an older Tek 1241 >color logic analyzer, which is very nice. Big and bulky though, only >good for the bench. Powerful and friendly to use for an older >piece. You can find them on ebay at reasonable prices. > >Dean. > > Want to have a go building my own scope. ftdi usb chip, analog devices chips(samples) and fpga (or cpld) for the fifo buffer AD9288BST-100 8 BIT 100 MSPS DUAL ADC - for scope AD7654AST 16-Bit Simultaneous Sampling 500kSPS - for logic analyser There are a few papers and designs floating around for scopes up to a few MHz. If anyones interested I can dig a few links up.