Need an oscilloscope...

[Eli]

Originally posted by: So

Originally posted by: lobadobadingdong
what frequency's to you need to analyze? I have (I think it's a 400Mhz) scope I haven't used in nearly 2 years. I got a new job and don't need it anymore.

ATM, I'm only analyzing frequencies in the 600KHz - 1Mhz range.

Hmm...

With audio circuits, don't you only need to analyz say, 20hz - 20khz?

Don't mind me, I'm ignorant when it comes to this stuff... 😱

 

[So]

Originally posted by: EyeMWing

Originally posted by: So

Originally posted by: RaynorWolfcastle

Originally posted by: So

Originally posted by: RaynorWolfcastle

Originally posted by: So
I don't NEED one, but as a EE, having one at home would be very nice.

errr what the heck for?

Projects, being able to work at odd hours.

If your school is like mine, there are 24-hour labs available.

Then my school is not. Except for the fact that I have the door code, but I'd bascially be breaking in in the middle of the night. All the building doors get locked, except one that they always forget.

Well, do you have the alarm code? 😛

Hehe, I don't think there is one.

 

[lobadobadingdong]

Originally posted by: So

Originally posted by: lobadobadingdong
what frequency's to you need to analyze? I have (I think it's a 400Mhz) scope I haven't used in nearly 2 years. I got a new job and don't need it anymore.

ATM, I'm only analyzing frequencies in the 600KHz - 1Mhz range.

pm me a reminder and I'll check it out tomorrow. (if I can remember where my probes are) I'll let you have it for cheap

 

[RaynorWolfcastle]

Originally posted by: So
Then my school is not. Except for the fact that I have the door code, but I'd bascially be breaking in in the middle of the night. All the building doors get locked, except one that they always forget.

Yeah the EE building here has keycard access to some labs 24x7 using our ID cards. meh.
So what frequencies are you designing your power amplifier for? it'll make a huge difference on what kind of scope you need. If it's for something in the RF spectrum, you will need a network analyzer and AFAIK those run $20k+. If it's for something low freq like a superhet FM radio or something you could get away with something pretty cheap.

You could probably score an old analog scope really cheap, but really who wants to deal with those anyways. IIRC, these are the most common scopes we have here
Text and they are quite nice though I'd imagine they're expensive too. If you go digital make sure it has all the functions you want out of it. FFT functionality is pretty great.

 

[So]

Originally posted by: Eli

Originally posted by: So

Originally posted by: lobadobadingdong
what frequency's to you need to analyze? I have (I think it's a 400Mhz) scope I haven't used in nearly 2 years. I got a new job and don't need it anymore.

ATM, I'm only analyzing frequencies in the 600KHz - 1Mhz range.

Hmm...

With audio circuits, don't you only need to analyz say, 20hz - 20khz?

Don't mind me, I'm ignorant when it comes to this stuff... 😱

Yeah, but with a class D amplifier, you need a triangle wave that is 3 to (preferably) 6 or more times the frequency you're amplifiying.

Here is what I'm building, ATM. Text (not my school, I found the diagram via google).

 

[So]

Originally posted by: RaynorWolfcastle

Originally posted by: So
Then my school is not. Except for the fact that I have the door code, but I'd bascially be breaking in in the middle of the night. All the building doors get locked, except one that they always forget.

Yeah the EE building here has keycard access to some labs 24x7 using our ID cards. meh.
So what frequencies are you designing your power amplifier for? it'll make a huge difference on what kind of scope you need. If it's for something in the RF spectrum, you will need a network analyzer and AFAIK know those run $20k+. If it's for something low freq like a superhet FM radio or something you could get away with something pretty cheap.

You could probably score an old analog scope really cheap, but really who wants to deal with those anyways. IIRC, these are the most common scopes we have here
Text and they are quite nice though I'd imagine they're expensive too. If you go digital make sure it has all the functions you want out of it. FFT functionality is pretty great.

We have a couple similar to those in our Control Systems lab, IMO, they are sweet, but the junior lab has more primitive analog tektronics 2-ch ones.

 

[Eli]

Originally posted by: So

Originally posted by: Eli

Originally posted by: So

Originally posted by: lobadobadingdong
what frequency's to you need to analyze? I have (I think it's a 400Mhz) scope I haven't used in nearly 2 years. I got a new job and don't need it anymore.

ATM, I'm only analyzing frequencies in the 600KHz - 1Mhz range.

Hmm...

With audio circuits, don't you only need to analyz say, 20hz - 20khz?

Don't mind me, I'm ignorant when it comes to this stuff... 😱

Yeah, but with a class D amplifier, you need a triangle wave that is 3 to (preferably) 6 or more times the frequency you're amplifiying.

Here is what I'm building, ATM. Text (not my school, I found the diagram via google).

Ahh, interesting.

I'm learning, seems slower than molasses in an Alaskan winter though.

Books.. that's what I need, books.

/heads off to the library

doh, it's 10:30pm on a Saturday..

/patiently waits until Monday

 

[RaynorWolfcastle]

Originally posted by: So
We have a couple similar to those in our Control Systems lab, IMO, they are sweet, but the junior lab has more primitive analog tektronics 2-ch ones.

🙁 That sucks. We only used analog scopes briefly in our introductory EE measurements lab and we've been using digital scopes since then. Analog scopes are a huge pain in the ass to work with, and more importantly you can save your results and get printouts with digital scopes.

 

[So]

Originally posted by: RaynorWolfcastle

Originally posted by: So
We have a couple similar to those in our Control Systems lab, IMO, they are sweet, but the junior lab has more primitive analog tektronics 2-ch ones.

🙁 That sucks. We only used analog scopes briefly in our introductory EE measurements lab and we've been using digital scopes since then. Analog scopes are a huge pain in the ass to work with, and more importantly you can save your results and get printouts with digital scopes.

Oh, I know, I know. The digital scopes are a wonder to work with. My only actual Lab class this semester uses them (as I described)... I love those things.

 

[RaynorWolfcastle]

Originally posted by: So

Originally posted by: RaynorWolfcastle

Originally posted by: So
We have a couple similar to those in our Control Systems lab, IMO, they are sweet, but the junior lab has more primitive analog tektronics 2-ch ones.

🙁 That sucks. We only used analog scopes briefly in our introductory EE measurements lab and we've been using digital scopes since then. Analog scopes are a huge pain in the ass to work with, and more importantly you can save your results and get printouts with digital scopes.

Oh, I know, I know. The digital scopes are a wonder to work with. My only actual Lab class this semester uses them (as I described)... I love those things.

I'm just saying you should definitely buy digital if you can find a decent one that you can afford. 🙂

 

[So]

Originally posted by: RaynorWolfcastle

Originally posted by: So

Originally posted by: RaynorWolfcastle

Originally posted by: So
We have a couple similar to those in our Control Systems lab, IMO, they are sweet, but the junior lab has more primitive analog tektronics 2-ch ones.

🙁 That sucks. We only used analog scopes briefly in our introductory EE measurements lab and we've been using digital scopes since then. Analog scopes are a huge pain in the ass to work with, and more importantly you can save your results and get printouts with digital scopes.

Oh, I know, I know. The digital scopes are a wonder to work with. My only actual Lab class this semester uses them (as I described)... I love those things.

I'm just saying you should definitely buy digital if you can find a decent one that you can afford. 🙂

I'll have to consider it. Maybe my school can get me a discount. 😛

 

[cerebusPu]

We are acquiring a tek scope at work. Its a DPO5000series. they have builtin cd burners, windows2000, touch screen... So freaking amazing. When i start my graduate degree in EE, the lab scopes will feel so inadequate.

 

[So]

Originally posted by: cerebusPu
We are acquiring a tek scope at work. Its a DPO5000series. they have builtin cd burners, windows2000, touch screen... So freaking amazing. When i start my graduate degree in EE, the lab scopes will feel so inadequate.

:shocked: