Please help me set up my Scopex

Ghostwriter · 25th April 2008, 05:54 AM

I have just bought an old scopex oscilloscope and would like to run an audio signal in to it from my sound card.

The oscilloscope has two coaxial inputs on the front labled "X" & "Y". Can I connect a line level audio signal to these inputs somehow?

I have found some coaxial RCA leads, that I can change one end to a coaxial plug, but I dont think this will work will it?

Say I use the left audio channel, how can I split this signal in to two sepperate leads to send to the coaxial "X" & "Y" oscilloscope inputs?

TheMG · 25th April 2008, 06:13 PM

You need to get yourself some oscilloscope probes. If you look around you can get some cheap ones.

There's TONS to be found on eBay for cheap. I can't vouch for the quality, but it's certainly better than no probes at all!

I'd get a couple switchable 1x/10x probes.

The channels on the oscilloscope can be used individually. It has two channels so you can measure two signals at once. Just connect a probe to one channel, ground clip to the audio ground and tip to audio output.

FWIW, the connector type on the oscilloscopes is referred to as a BNC connector.

Ghostwriter · 26th April 2008, 11:13 AM

Thanks MG, I have a problem.

It's all responding fine, however the vertical and horizontal axis are both offset somewhat, it looks twisted (well it is twisted)..I can center them ok, but I can't un-twist them.

Any Ideas how to do this, I'm guessing I'm going to have to take it apart

Ghostwriter · 26th April 2008, 11:13 AM

oh, haha..... theres a rotate slot for a screwdriver on the front... , silly me

Ghostwriter · 26th April 2008, 03:10 PM

Nope, it aint workin'.

The Rotate slot wont turn to the left far enough to bring the signal up straight, If I take it apart is this something that could be easy enough to fix myself?

has it got to go off to the local electricians ?

studiot · 9th May 2008, 07:13 PM

You can rotate the tube inside its shield in those old Scopex models.

For safety, make alignment marks with tippex on the tube and fascia and switch off, allowing 10 minutes discharge time before attempting the rotation.

This should allow you to bring the alignment within the range of the adjustment screw.

Ghostwriter · 10th May 2008, 01:05 PM

Ok, thanks. I'll have a go.

25th April 2008, 05:54 AM	#1
Ghostwriter diyAudio Member Join Date: Apr 2008	Please help me set up my Scopex I have just bought an old scopex oscilloscope and would like to run an audio signal in to it from my sound card. The oscilloscope has two coaxial inputs on the front labled "X" & "Y". Can I connect a line level audio signal to these inputs somehow? I have found some coaxial RCA leads, that I can change one end to a coaxial plug, but I dont think this will work will it? Say I use the left audio channel, how can I split this signal in to two sepperate leads to send to the coaxial "X" & "Y" oscilloscope inputs?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

25th April 2008, 06:13 PM	#2
TheMG diyAudio Member Join Date: Jan 2008	You need to get yourself some oscilloscope probes. If you look around you can get some cheap ones. There's TONS to be found on eBay for cheap. I can't vouch for the quality, but it's certainly better than no probes at all! I'd get a couple switchable 1x/10x probes. The channels on the oscilloscope can be used individually. It has two channels so you can measure two signals at once. Just connect a probe to one channel, ground clip to the audio ground and tip to audio output. FWIW, the connector type on the oscilloscopes is referred to as a BNC connector.

26th April 2008, 11:13 AM	#3
Ghostwriter diyAudio Member Join Date: Apr 2008	Thanks MG, I have a problem. It's all responding fine, however the vertical and horizontal axis are both offset somewhat, it looks twisted (well it is twisted)..I can center them ok, but I can't un-twist them. Any Ideas how to do this, I'm guessing I'm going to have to take it apart

26th April 2008, 03:10 PM	#5
Ghostwriter diyAudio Member Join Date: Apr 2008	Nope, it aint workin'. The Rotate slot wont turn to the left far enough to bring the signal up straight, If I take it apart is this something that could be easy enough to fix myself? has it got to go off to the local electricians ?

9th May 2008, 07:13 PM	#6
studiot diyAudio Member Join Date: May 2008	You can rotate the tube inside its shield in those old Scopex models. For safety, make alignment marks with tippex on the tube and fascia and switch off, allowing 10 minutes discharge time before attempting the rotation. This should allow you to bring the alignment within the range of the adjustment screw.

10th May 2008, 01:05 PM	#7
Ghostwriter diyAudio Member Join Date: Apr 2008	Ok, thanks. I'll have a go.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)