A piece of measurement equipment which can visualize one or more signals simultaneously on a time scale.

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56 views

Oscilloscope gear and ESD

The answer might be obvious, but I am curious, how well are oscilloscopes and probes usually protected against ESD? I noticed that oscilloscope probes are usually shipped in esd-protected bags. On ...
0
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1answer
54 views

Make sure this equipment can do what I want (infrared decoding) [on hold]

I'm CS but took a digital electronics physics class at my old university and found it really interesting so I wouldn't mind having my own small EE workshop. For my main project I just want to decode ...
2
votes
1answer
60 views

oscilloscope time charging different from the math

For the above circuit, I calculate that the equivalent resistance of the charging circuit is 2.668 kΩ, and the equivalent capacitance is 2.055 µF. Therefore, the time constant would be ...
0
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1answer
67 views

TV signal into an Oscilloscope

I'm plugging TV signal cable directly into an oscilloscope. TV cable looks like this: First I connected outer shell of TV cable connector to GND of oscilloscope BNC cable and center to the center of ...
0
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1answer
38 views

BNC cable instead of oscilloscope probe for fixed setup?

I'm developing a device, it will generate a signal that will be fed directly to an oscilloscope, and connected permanently. I now have the circuitry set up on a breadboard, attached to the scope ...
0
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1answer
74 views

Oscilloscope pulse frequency

I'm measuring pulses from a device with a constant frequency. The oscilloscope's usual frequency indicator shows 600 Hz. But when I use "Measure" button and then Type is set to Frequency, then that ...
1
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1answer
512 views

why is this oscilloscope so cheap with a 20Gsa/s sampling resolution?

I've looked around this site but I haven't been able to figure out why this oscilloscope seems to have such a high sampling rate "Repetitive mode: 20GSa/S" and be relatively cheap: ...
5
votes
2answers
159 views

How to test a crystal resonator in board?

I have 2 quartz crystal resonators in my pcb board: 32.768 kHz & 20 MHz. They are connected to a Freescale MC12311 transceiver IC, which has an HCS08 micro-controller embedded in it. I want to ...
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2answers
53 views

Is the voltage from peak to peak my thevenin in voltage?

I used a function generator and set it to 1kHz. And used an oscilloscope to measure the time constant of an rl and rc circuit. my question was that what would I consider as Vth or voltage thevenin , ...
0
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1answer
78 views

What are the demo 1 and demo 2 terminals on the oscilloscopes?

I have seen almost all oscilloscope providing this demo1 or may be demo2 terminals on their oscilloscopes which has the square wave running all the time? I can't figure out the purpose of those demo ...
3
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2answers
154 views

Oscilloscope sweeps only once with DC sources and shows nothing on GND setting

I got an old CRT oscilloscope someone had laying around unused in his garage (an ATAIO AI 751A which seems pretty obscure, not getting any meaningful Google results). Unfortunately the user manual is ...
3
votes
2answers
117 views

Measure peak voltage / amp, when signal is very short (relay on/off)?

I was measuring a 'steer' signal for switching on a relay. The oscilloscope, gave me back it peaks at around 2.64V. The width of the signal is 132ms. I then hooked up my multimeter, to measure how ...
4
votes
1answer
90 views

How can I track where this 471kHz noise is coming from?

I'm new to EE in general and I just received my first oscilloscope (Rigol DS1102E). Anyway, I'm building an audio circuit using an Arduino Micro and the infamous ...
3
votes
0answers
82 views

Why does my crystal oscillator spike so much?

I just got a new oscilloscope (Rigol DS1102E) and I'm new to EE in general. One of the first things I put on the scope was my 3.579Mhz "TKD" crystal oscillator. ...
1
vote
2answers
120 views

Filter 50Hz hum picked up by the oscilloscope

I am measuring huge 50Hz oscillations on my oscilloscope, but I am not entirely sure the probe is generating those by behaving like an antenna (an ADC at the same point gives stable values but it's ...
1
vote
0answers
40 views

Acoustic signal on oscilloscope [closed]

I'm trying to measure some echo acoustic signals in an oscilloscope DSO-X 2002A 70MHz bw, 2GSa/s from discontinuities in a rock cylinder. The acoustic velocity for P-waves (which is the type of ...
2
votes
1answer
63 views

Effect of the high impedance or low impedance of oscillospe

I am measuring a sine waveform range 0 to 40MHz by using Agilent InfiniVision DS0-X 3034A. The data sheet of the oscilloscope is here: http://cp.literature.agilent.com/litweb/pdf/5990-6619EN.pdf My ...
0
votes
1answer
111 views

AC and DC voltage are constant even though the frequency changes

In the circuit below, why does the AC voltage remain constant even though the frequency increases?
4
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2answers
236 views

Terminating a 50 Ohm source into 1M Ohm oscilloscope input

Due to buying some equipment several months apart I am now faced with the task of connecting a high speed ,up to 1GHz, light detector that requires a 50\$\Omega\$ load impedance, but my oscilloscope ...
0
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2answers
57 views

Choosing Oscilloscope with appropriate bandwidth for Jitter analysis

Can someone give me a rule of thumb of choosing Oscilloscope with appropriate bandwidth for the Jitter analysis of clock signals? What device is highly preferable: spectrum analyzers, frequency ...
3
votes
2answers
160 views

Cannot get a digital square wave on oscilloscope from the GPIO of the Raspberry Pi?

ENVIRONMENT: Running "Raspbian" on Model_B Raspberry Pi (Revision 2) w/ ribbon expanding the GPIO out onto a Breadboard as shown in the following image. SETUP Here is a close up of the GPIO ...
3
votes
1answer
93 views

Can the DS1052E be used for reliable NTSC measurement?

I'm in the market for an oscilloscope. I've read that the infamous DS1052E from Rigol is a great beginner scope due to the price/performance. However, I know I have a lot to learn and simply don't ...
1
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1answer
39 views

View High Voltage AC Signal on Oscilloscope

I would like to capture a high voltage AC signal on an oscilloscope. Input signal: 160V @ 400Hz Output signal: ~40V @ 400Hz Oscilloscope: TDS3014C I intend to use a voltage divider: 100k ohm (1/2 ...
1
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1answer
54 views

Measure both sides of an AC and DC circuit

So I have recently begun messing with diodes and there use in converting AC to DC. What I am curious in trying to do is to hook up my dual channel oscilloscope on bother DC and AC side to view the ...
2
votes
1answer
73 views

Ground noise measured on scope

I've connected a scope probe directly to the ground clip of the scope. I then observe the signal on the scope and it's reading 0, as expected. I set my trigger to be 1V above the 0V reading it ...
3
votes
2answers
100 views

How can I multiplex my oscilloscope probes?

Let's say that I'm tasked with the job of measuring the propagation delay of each inverter in a 7404 hex inverter. I've got a pulse generator, a power supply, and an oscilloscope with two probes, so ...
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2answers
126 views

What kind of tools would I need to analyze 1000BASE-T/gigabit ethernet waveforms?

I'm an EE student and I'd like to get some visibility into the 1000BASE-T Ethernet waveform. My goal is to induce jitter to learn more about real-world error correction, possibly resulting in research ...
20
votes
4answers
2k views

Building a hobbyist oscilloscope

I have a project that I've been thinking about for a little while, and I've come to the realization that at some point during its development, I'm going to need an oscilloscope. Okay, not a problem. ...
4
votes
2answers
168 views

Using oscilloscope safely with AC mains

I know there is quite few discussions already on this topic, but since english isn't my first language I though it better to get some more information about this. I have used oscilloscopes to ...
1
vote
1answer
79 views

Analyzing the crystal frequency (Bus Clock Frequency) of a HCS12 Microcontroller using an Oscilloscope

I have an HCS12 Mircocontroller and I would like to capture the crystal frequency from the bus clock on a oscilloscope. How do I find out where I should connect my probes on the board to analyze ...
3
votes
1answer
118 views

Regarding Passive Probes 1:1 and 10:1

I have a few questions regarding reduction of capacitive loading of oscilloscopes probes and cables in case of 10:1 probes compared to 1:1 probes. I am basing my research on these links: Wikipedia: ...
1
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0answers
32 views

MPX2100DP only measures depression

I'm trying to read out the analog differential pressure sensor MPX2100DP. In my first approach I used an oscilloscope to visualize the change of voltage. My basic setup was only the sensor connected ...
0
votes
3answers
114 views

Reducing power supply ripple for GSM modem

I'm powering a SM5100B GSM modem from a 5A bench supply (peak current is 2A). The required supply range is Vmin=3.3V, Vnom=3.6V, Vmax=4.2V, so I'm giving it 4V. Every so often, the module will reboot ...
1
vote
1answer
107 views

Oscilloscope preamp for smartphones

I want to build an oscilloscope preamp and wonder what sort of op amp should I use? What's the maximum input level a smartphone can handle and should I bias the signal (for instance -5V/+5v to ...
3
votes
1answer
115 views

Replacement cap (filter / choke) for oscilloscope power supply

My dad's poor old Philips PM3070 scope died in a sizzle and a puff of smoke a few days back, after being sat in the garage for a year or so. He donated it to me and it seemed to work at first, but ...
2
votes
3answers
278 views

Does an Oscilloscope's bandwidth need to match or exceed the microcontroller's/processor's clock speed?

Looking to buy an oscilloscope for home use, I've seen the questions on here in regards to bandwidth. I'm interested in prototyping microprocessors with clock speeds 800+ MHz, but I shouldn't need an ...
0
votes
1answer
96 views

Visualising data rate as square waves (Converting bits per second into hertz) for selecting ADC sampling frequency

I know that bits per second and hertz are two different units. This question will help me in designing an oscilloscope with proper ADC sampling frequency for viewing communication protocols. Just ...
2
votes
0answers
101 views

Debugging VGA signal

I have tried to use my Open bench logic sniffer to capture data from a VGA output. I'm pretty sure I understand how the waveform should look, but I not getting consistent data. It feels very shaky to ...
1
vote
1answer
99 views

Analysing oscilloscope data? [closed]

I am using some software called 'XOscillo', which uses an Arduino as a simple (albeit underpowered) oscilloscope. I am wondering how I'd actually analyse some exported data from it. It exports data in ...
0
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4answers
99 views

Not earth grounded old analog oscilloscope

I have an old analog oscilloscope: http://www.ebay.co.uk/itm/Advance-OS-240-10MHz-Dual-Trace-Oscilloscope-with-Instruction-Manual-/261220770137 It doesn't have 3 pins power connector instead it has 2 ...
2
votes
1answer
127 views

thick waveform in oscope [closed]

I built an oscilliscope with ARM and internal ADC (Atmel), but my signal is very thick (noisy). It looks like this link, but sometimes worse! Could the ADC be outputting noisy values? What could be ...
6
votes
4answers
847 views

How can I measure the frequency of a watch crystal using my oscilloscope?

I am trying to measure the frequency of a 32.768 kHz watch crystal which is connected to my AVR MCU. This is so that I can fine-tune the crystal's capacitor values to get a correct frequency. However, ...
1
vote
1answer
113 views

Multisim. Why the parameters of voltage in osciloscope and voltmeter diferent?

I have simple design: and the oscilloscope graphic: The Voltage of oscilloscope and voltmeter mismatches. The oscilloscope value is higher. Why and how can I fix it? I'm using Multisim 13.
6
votes
3answers
176 views

Is there a common name for scope collar clips?

I am looking for spare scope collar clips (which attach the ground lead to the scope probe), so that I can make some custom ground attachments for connecting probes to some PCBs. The current crocodile ...
0
votes
1answer
116 views

Amplitude modulated wave weird display in oscilloscope

In my lab experiment (http://www.ele.uri.edu/courses/ele436/labs/expA2.pdf), My amplitude modulated wave is not displaying the vertical lines-the high frequency waves of carrier (as shown in ...
4
votes
1answer
288 views

TTL logical low isn't ground

I'm working with an Arduino Due and four 5V TTL pressure sensors. I'm using this logic level converter to convert from the 3.3V Due to the 5V sensors. I've been having problems using all four at a ...
1
vote
1answer
121 views

Why I cannot see SPI signal properly with oscilloscope?

When I monitor a SPI bus with only one probe, I see such output when data is transferred. I know that I need to use a logic analyzer to monitor the SPI, but I wonder why I see such signal that ...
4
votes
1answer
94 views

Procedure for experimentally determining decoupling capability?

I'm looking for a bullet-point list of a technique to experimentally determine a design's decoupling capability. I have a design that I'm working on that seems to be susceptible to ESD events in the ...
1
vote
1answer
332 views

Simulating circuits online, oscilloscope?

I'm playing around with some op-amp tutorials, trying to get a grip on how they work. I'd like to build some of them to get a better grip on how they work. I'm on CircuitLab right now since I've got a ...
2
votes
2answers
159 views

Why does my power supply show a signal on the oscilloscope when off?

Oscilloscope shows a sinusoid V(RMS)=1.67V and V(MAX)=2.48V. I have a GW INSTEK GPS-3303 power supply and a RIGOL DS1052E oscilloscope. The supply is in series tracking mode, with the probe directly ...