Problems we don't need

Started by Sylvia Else in sci.electronics.design1 week ago 30 replies

Bought a couple of oscilloscope probes today to replace those damaged/lost. They don't fit, because the plastic surround exceeds the specified...

Bought a couple of oscilloscope probes today to replace those damaged/lost. They don't fit, because the plastic surround exceeds the specified diameter for a BNC plug. My scope has a hole in its front plate to accommodate a standard BNC plug, but it's not big enough for this oversized plastic variant. This probably saves several cents per probe, but created a problem I didn't need. ...


Repurpose smartphone as oscilloscope camera.

Started by Wanderer in sci.electronics.design5 years ago 19 replies

I'm looking at making a scope camera out of a smartphone. I have an old Tek 422 and I want hack one of those bluetooth camera remotes and...

I'm looking at making a scope camera out of a smartphone. I have an old Tek 422 and I want hack one of those bluetooth camera remotes and connect it to the gate output of the scope. I've been looking at smartphones on ebay and some of the cheap used ones are locked. How disabled is a locked cellphone? I understand I can't connect to the phone network but what other functionality i


Job posting

Started by Jim Thompson in sci.electronics.design8 years ago 65 replies

Job posting... "Synaptics - Phoenix, AZ ... Ph.D. program in E.E. Analog circuit coursework and hands-on lab experience a must Hands-on...

Job posting... "Synaptics - Phoenix, AZ ... Ph.D. program in E.E. Analog circuit coursework and hands-on lab experience a must Hands-on experience with digital multi-meter, oscilloscope, etc...." Bwahahahaha > :-} ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations


An Affordable 160 GHz Sampler

Started by Steve Wilson in sci.electronics.design3 months ago 9 replies

Conventional samplers for home brewers usually go to 1 GHz. The SD-32 sampler for the Tektronix 11801C mainframe goes to 50 GHz. The HP...

Conventional samplers for home brewers usually go to 1 GHz. The SD-32 sampler for the Tektronix 11801C mainframe goes to 50 GHz. The HP 110GHz oscilloscope costs around $1.3 Million USD, with a 10-bit resolution. Very impressive, and very expensive: https://www.youtube.com/watch?v=DXYje2B04xE I have invented a new sampling technology that promises 160 GHz bandwidth, yet is affordable to ...


'scope probe ground spring.

Started by George Herold in sci.electronics.design3 years ago 11 replies

Hi all, I'm doing some relatively (for me) fast stuff. I get ringing from the x10 scope probe ground clip wire, and I end up making my own...

Hi all, I'm doing some relatively (for me) fast stuff. I get ringing from the x10 scope probe ground clip wire, and I end up making my own little ground rings from bus wire that I solder to my bread board. Like this, https://electronics.stackexchange.com/questions/136123/how-do-you-attach-an-oscilloscope-ground- spring I was thinking that it would be nice if someone made these for


Input/Output Current Compare - Scope Measurement

Started by Robert Miller in sci.electronics.design4 years ago 6 replies

I have a circuit that steps up a 30KHz sine wave from 12 to 240 volts. I would like to compare its input current with the maximum that can be...

I have a circuit that steps up a 30KHz sine wave from 12 to 240 volts. I would like to compare its input current with the maximum that can be drawn on the output. A variable ceramic resistor would be used as the load. My idea was to make two of the circuits below, place one on the input, one on the output, and view both channels on an oscilloscope in subtraction mode. http://www.capp...


Any PicoScope users?

Started by Terry Pinnell in sci.electronics.design6 years ago 6 replies

I use a PC oscilloscope from UK company Pico Technology. An old model called ADC-200 which is no longer supported but meets my hobbyist needs...

I use a PC oscilloscope from UK company Pico Technology. An old model called ADC-200 which is no longer supported but meets my hobbyist needs well. It connects to a USB socket on my XP PC via a special adapter, the 'Pico USB Parallel Port'. Suddenly, it's stopped working. The Picoscope software tells me 'The ADC-200 is not connected. Looks like the adapter is broken. (Its LED is not on and it...


Low Pass Filter Testing

Started by Anonymous in sci.electronics.design9 years ago 18 replies

Hi, I am reading the following paper to do some Low pass and Anti Aliasing Filter testing...

Hi, I am reading the following paper to do some Low pass and Anti Aliasing Filter testing http://edge.rit.edu/content/P08050/public/PDF%20Documentation/Testing%20Strategy.pdf My question is as follows The paper says that I should Oscilloscope to see the results that are demonstrated in figure 2 and 3. How is that possible? The figures are plots of gain vs frequency! I can see the ...


LVDT question

Started by Marco Trapanese in sci.electronics.design9 years ago 20 replies

Take an LVDT (series-opposite), apply a sine wave on the primary coil and measure the output signal on the secondary coil with an...

Take an LVDT (series-opposite), apply a sine wave on the primary coil and measure the output signal on the secondary coil with an oscilloscope. Do you agree you *must* see a change in the amplitude when you move the rod? At least you should expect a null signal when the rod is place at null point. What if this doesn't happen? I mean the output signal changes very slightly around it'...


Bruce Carsten's 'EMI Sniffer Probe'

Started by Anonymous in sci.electronics.design1 year ago 10 replies

I've many times made ad hoc sniffer coils for hunting out EMI & found them invaluable. This more-refined implementation came across my radar...

I've many times made ad hoc sniffer coils for hunting out EMI & found them invaluable. This more-refined implementation came across my radar this morning, and seemed worthy of revisiting for the group. The EMI Sniffer Probe is a small pick-up coil for probing high-frequency magnetic fields with an oscilloscope, featured in Jim Williams' classic AN118, Appendix E. https://www.analog.com/...


scope probe impedance

Started by Mike Miller in sci.electronics.design8 years ago 9 replies

All, I am looking at a Tektronix TDS3054B Digital Oscilloscope. 1.) In the specs for the scope the input impedance is shown as: 1 M=CE=A9...

All, I am looking at a Tektronix TDS3054B Digital Oscilloscope. 1.) In the specs for the scope the input impedance is shown as: 1 M=CE=A9 in parallel with 13 pF or 50 =CE=A9 http://www.atecorp.com/products/tektronix/tds3054b.aspx 2.) The probes that I have to use for this are the TEKT-P6139A . These probes look to have an impedance of 10 M=CE=A9 http://www.csus.edu/indiv/t/t...


RF receiver interfacing to processor GPIO

Started by Anonymous in sci.electronics.design9 years ago 4 replies

I have 433Mhz RF receiver whose output is connected to the processor for d= ecoding the transmitted codes. Both the RF receiver and micro are at...

I have 433Mhz RF receiver whose output is connected to the processor for d= ecoding the transmitted codes. Both the RF receiver and micro are at 3.3V l= ogic levels. Output of the RF receiver is fine (swinging 3.2V for logic HIG= H and 0V for logic LOW)as viewed on the oscilloscope and logic analyzer. Bu= t when I connect the receiver output to the GPIO input pin of the processor= the HIGH ...


RS232 decode routines from raw scope data?

Started by Joerg in sci.electronics.design3 years ago 76 replies

Is there a simple Windows or Linux program that can decode serial data out of raw data from an digital oscilloscope? My old logic analyzer...

Is there a simple Windows or Linux program that can decode serial data out of raw data from an digital oscilloscope? My old logic analyzer does not have any serial data decoding and neither does my scope. So I'd need something that can take in the ADC raw data, I set a threshold to turn that into H/L digital values and the software would fish out the data words. Not sure if it even exis...


Audio 100V signal to line level

Started by Anonymous in sci.electronics.design6 years ago 16 replies

All, I am doing some testing with an audio PA system that has the output of 100V (rms). What I am trying to do is take this 100V(rms) and...

All, I am doing some testing with an audio PA system that has the output of 100V (rms). What I am trying to do is take this 100V(rms) and bring it down to an audio line level of about 280 mV (rms). I am doing this with a resistor divider. 1.) An image of 100V (rms) input signal measured on oscilloscope is below: http://s1070.photobucket.com/user/Mrblueblue1234/media/input_100V_zpsze...


weird sim

Started by John Larkin in sci.electronics.design7 years ago 3 replies

Here's that strange LT Spice...

Here's that strange LT Spice thing: https://dl.dropboxusercontent.com/u/53724080/Circuits/Sampler_Sim/SH_Test.asc https://dl.dropboxusercontent.com/u/53724080/Circuits/Sampler_Sim/SH1.jpg https://dl.dropboxusercontent.com/u/53724080/Circuits/Sampler_Sim/SH2.jpg It's a simple simulation of an equivalent-time sampling oscilloscope. It runs *very* slow, hence the screen shots. What's ...


Sound card scope SW with smooth roll mode?

Started by Joerg in sci.electronics.design9 years ago 46 replies

Hello Folks, Does anyone know of a sound card oscilloscope software that does the following? a. Windows b. Smooth non-trigger roll mode,...

Hello Folks, Does anyone know of a sound card oscilloscope software that does the following? a. Windows b. Smooth non-trigger roll mode, no jitter or jerking (very important) c. Can read in from WAVE under Windows d. Scroll rate can be changed, somewhat decent display The smooth roll mode is most important, where new parts of trace come in at the right and roll off the left. To my su...


129 USD gain/phase analyzer

Started by Klaus Kragelund in sci.electronics.design5 years ago 1 reply

Hi Just wanted to share this I just downloaded the open source gain/phase analyzer for the Pico...

Hi Just wanted to share this I just downloaded the open source gain/phase analyzer for the Pico scopes https://bitbucket.org/hexamer/fra4picoscope/wiki/Home It works great So use you Picoscope to get a gain/phase analyzer for free, or if you can use a USB scope also, then spend 129 USD for the cheapest Picoscope with AWG: https://www.picotech.com/oscilloscope/2000/picoscope-2000-...


Old analog oscilloscope

Started by bitrex in sci.electronics.design6 years ago 23 replies

I picked this surplus 2 channel Kikusui analog scope at a surplus sale for a couple bucks: ...

I picked this surplus 2 channel Kikusui analog scope at a surplus sale for a couple bucks: https://www.dropbox.com/s/5bgmvq73g9o65l7/Photo%20Jan%2027%2C%205 %2032%2054%20PM.jpg?dl=0 It's nominally 60 Mhz bandwidth, but on the top it has a sticker that says the bandwidth is limited: https://www.dropbox.com/s/bmbwttjruirwcb1/Photo%20Jan%2027%2C%205% 2033%2007%20PM.jpg?dl=0 Any w...


"Doom" runs on any hardware

Started by bitrex in sci.electronics.design5 years ago 6 replies

Doom on an ATM machine: Doom on a printer: Doom on a calculator: Doom on a digital camera: Doom on an...

Doom on an ATM machine: Doom on a printer: Doom on a calculator: Doom on a digital camera: Doom on an oscilloscope: Doom on a ZX Spectrum: