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Old 6th April 2011, 09:33 PM   #1
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Default Oscium Oscilliscope

Home | Oscium

A new 5Mz scope using iPad, iPhone iPod Touch for UI.

I know little about scopes... comments?

dave
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Old 7th April 2011, 02:35 AM   #2
cliffyk is offline cliffyk  United States
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An interesting toy...

The analog BW of 5MHz is bumping right up against the Nyquist limit of the sampling rate of 12MS/s. The usable bandwidth at best 1/5 of the sample rate or 2.4Mhz.

The real bummer is the 240 point sample depth which makes it sort of a Fisher-Price "My First Oscilloscope".

At $298 it is grossly overpriced, you can buy a real single channel 20Mhz scope with 6k points capture depth for $30 more...
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Old 7th April 2011, 02:54 AM   #3
cbdb is offline cbdb  Canada
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Or a dual 50mhz digital scope.

$339.99 - RIGOL DS1052E 5.6" TFT LCD 50MHz 2-Channel Digital Color Storage Oscilloscope - Professional Tools
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Old 7th April 2011, 03:03 AM   #4
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Originally Posted by cliffyk View Post
An interesting toy...

The analog BW of 5MHz is bumping right up against the Nyquist limit of the sampling rate of 12MS/s. The usable bandwidth at best 1/5 of the sample rate or 2.4Mhz.

The real bummer is the 240 point sample depth which makes it sort of a Fisher-Price "My First Oscilloscope".

At $298 it is grossly overpriced, you can buy a real single channel 20Mhz scope with 6k points capture depth for $30 more...
FWIW the Tek TDS-3054 stays FAR away from Nyquist. 500 MHz samples at 5 GHz. I've been using them for 13 years.

G
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Old 7th April 2011, 03:12 AM   #5
singa is offline singa  Singapore
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I agree this is value for money. and fft feature which is good for checking
noise and frequency(speaker) spectrum plus other goodies.Very useful in deed.
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Old 7th April 2011, 03:30 AM   #6
cliffyk is offline cliffyk  United States
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Quote:
Originally Posted by stratus46 View Post
FWIW the Tek TDS-3054 stays FAR away from Nyquist. 500 MHz samples at 5 GHz. I've been using them for 13 years.

G
Hardly in the same ballpark price-wise...
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Old 7th April 2011, 03:40 AM   #7
kevinkr is offline kevinkr  United States
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Originally Posted by cliffyk View Post
Hardly in the same ballpark price-wise...
No, but very good used TEK scopes can be purchased on eBay for a few hundred dollars. I've bought several over the years with no problems - just need to make sure you are buying one from someone who can confidently state that it is in working order. (I.E. Avoid the "it lights up" and "I have no way to test it" sellers..)
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Old 7th April 2011, 03:42 AM   #8
kevinkr is offline kevinkr  United States
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Originally Posted by planet10 View Post
Home | Oscium

A new 5Mz scope using iPad, iPhone iPod Touch for UI.

I know little about scopes... comments?

dave
A toy, admittedly a cool one, but performance on analog waveforms is probably not going to be that good..
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Old 7th April 2011, 03:49 AM   #9
kevinkr is offline kevinkr  United States
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I agree this is value for money. and fft feature which is good for checking
noise and frequency(speaker) spectrum plus other goodies.Very useful in deed.
Only 8 bit quantization, wait until you see what a good sinewave looks like..
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Old 7th April 2011, 03:49 AM   #10
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Originally Posted by cliffyk View Post
Hardly in the same ballpark price-wise...
The price wasn't the point. The 10:1 bandwidth vs sample rate was. The 5MHz scope is more like 1-1.5 MHz with a 12 MHz sample rate.

G
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