Look what I found in a back room at the office

[Sir-Lancelot 216]

Was looking for something today, and found this hiding under some stuff. Anyone ever seen one like this or better yet used one like it? It looks to be over my head unless someone could dumb it down for me. I set gains by ear, but if this could be used I would like to play around with it some.

There is no manual that I can find. Maybe I could contact the manufacturer, but thought I would ask here before I put too much effort into something that Maybe cant even be used for what I want to do with it.

Here is a pic, sorry it's crappy took it on my Blackberry.

Leader LBO 525L Oscilloscope 50MHz

Any thoughts ??

Thanks.

[mbarber25 29]

lol i won't be of any help sry..

but i can't help but ask... what do u do for a living to find something like that "under some stuff" in your office? what other random stuff do u find lol

[Sir-Lancelot 216]

LOL I think not, but I just have to ask. Even if it could work, I feel pretty safe in saying I would have no idea how to use it without taking a course at a Tech school. : )

I sell office equipment. The item was found under some boxes in my technicians work area. They didn't know it was there.

Edited July 17, 2009 by Sir-Lancelot

[Tirefryr 1,742]

How much do you want for it?

[mbarber25 29]

haha oh but gl.. looks like you got some help/buyers

[Sir-Lancelot 216]

How much do you want for it?

Sorry, it's not mine to sell.

[Tirefryr 1,742]

Well damn. I need another one to store at my parent's house.

[Sir-Lancelot 216]

Well damn. I need another one to store at my parent's house.

Since you have one, can this be used to view a signal from my amps?

[ncacoates 104]

boo i want one, too bad they are expensive

[Lucky 76 5]

well u will need the probes for that before you can do anything ... most likely a 1x probe is not going to suffice ... u will need to get a set of 10x probes .... after getting these adjust channel 1 setting to either ac or dc it does not matter ... depending on how much voltage you will need to adjust the channel 1 knob at the top accordingly ... just play with it until you can see the sine wave

[Lucky 76 5]

ps there is about a 100 of these at where i intern

[Sir-Lancelot 216]

well u will need the probes for that before you can do anything ... most likely a 1x probe is not going to suffice ... u will need to get a set of 10x probes .... after getting these adjust channel 1 setting to either ac or dc it does not matter ... depending on how much voltage you will need to adjust the channel 1 knob at the top accordingly ... just play with it until you can see the sine wave

Hey thanks for the reply Lucky.

I found the settings you mentioned and there is a big bag of probes. I checked a few and most have 10x on them. Some with alligator clips extended from a wire off the probe, some not. I brought this home with me today so I have use of it as long as I need it.

If I took better pics, would you have time to guide me through this process? I would make it worth your time, within reason.

[Lucky 76 5]

well u will need the probes for that before you can do anything ... most likely a 1x probe is not going to suffice ... u will need to get a set of 10x probes .... after getting these adjust channel 1 setting to either ac or dc it does not matter ... depending on how much voltage you will need to adjust the channel 1 knob at the top accordingly ... just play with it until you can see the sine wave

Hey thanks for the reply Lucky.

I found the settings you mentioned and there is a big bag of probes. I checked a few and most have 10x on them. Some with alligator clips extended from a wire off the probe, some not. I brought this home with me today so I have use of it as long as I need it.

If I took better pics, would you have time to guide me through this process? I would make it worth your time, within reason.

its pretty self explanitory ... hook up the 10x probe to the channel 1 ... probe goes on + and alligator clip goes on - output ... run a 50 hz tone for sub 1khz for speaker ... u will see a sine wave it may be too small to see adjust the top channel 1 knob ... if it goes off the screen do the same ... adjust the gains until u get a clip the turn it down a tad

[Lucky 76 5]

by the way its the voltage division knob ... if u cant see the top of the wave at max setting use the position knob ... if u still cant see it u might need a 100x probe which is very unlikely

[Sir-Lancelot 216]

well u will need the probes for that before you can do anything ... most likely a 1x probe is not going to suffice ... u will need to get a set of 10x probes .... after getting these adjust channel 1 setting to either ac or dc it does not matter ... depending on how much voltage you will need to adjust the channel 1 knob at the top accordingly ... just play with it until you can see the sine wave

Hey thanks for the reply Lucky.

I found the settings you mentioned and there is a big bag of probes. I checked a few and most have 10x on them. Some with alligator clips extended from a wire off the probe, some not. I brought this home with me today so I have use of it as long as I need it.

If I took better pics, would you have time to guide me through this process? I would make it worth your time, within reason.

its pretty self explanitory ... hook up the 10x probe to the channel 1 ... probe goes on + and alligator clip goes on - output ... run a 50 hz tone for sub 1khz for speaker ... u will see a sine wave it may be too small to see adjust the top channel 1 knob ... if it goes off the screen do the same ... adjust the gains until u get a clip the turn it down a tad

Okay, got that part, but I have a few more, sorry.

How can I set the head unit? high level or from the rca? Hook to + - or L R and turn it up? What test tone? I have 4 plus sub out. OR do I just set the HU at 75% and go directly to the amps?

Do I unhook my speakers? I would think not since my amps would need to see resistance to make the power at ohms I want.

Do I hook to the speaker leads at the amp?

Where do I ground the probe clip? Negative speaker wire?

Edited July 17, 2009 by Sir-Lancelot

[Lucky 76 5]

well u will need the probes for that before you can do anything ... most likely a 1x probe is not going to suffice ... u will need to get a set of 10x probes .... after getting these adjust channel 1 setting to either ac or dc it does not matter ... depending on how much voltage you will need to adjust the channel 1 knob at the top accordingly ... just play with it until you can see the sine wave

Hey thanks for the reply Lucky.

I found the settings you mentioned and there is a big bag of probes. I checked a few and most have 10x on them. Some with alligator clips extended from a wire off the probe, some not. I brought this home with me today so I have use of it as long as I need it.

If I took better pics, would you have time to guide me through this process? I would make it worth your time, within reason.

its pretty self explanitory ... hook up the 10x probe to the channel 1 ... probe goes on + and alligator clip goes on - output ... run a 50 hz tone for sub 1khz for speaker ... u will see a sine wave it may be too small to see adjust the top channel 1 knob ... if it goes off the screen do the same ... adjust the gains until u get a clip the turn it down a tad

Okay, got that part, but I have a few more, sorry.

How can I set the head unit? high level or from the rca? Hook to + - or L R and turn it up? What test tone? I have 4 plus sub out. OR do I just set the HU at 75% and go directly to the amps?

Do I unhook my speakers? I would think not since my amps would need to see resistance to make the power at ohms I want.

Do I hook to the speaker leads at the amp?

Where do I ground the probe clip? Negative speaker wire?

its pretty much the same thing for each ... be prepared for a wealth of knowledge

... before doing n e thing set all eqs to 0 or bass enhancement loudness anything

... everything needs to remain neutral

... turn ur high pass and low pass on on ur h/u

... if you are using high levels then connect probe to pos speaker wire and aligator to negative

... use a 1khz test tone and turn ur head unit until u experience clipping

... once clipping begins turn it down a little

... record and test the other 3 outputs as they can be different

... whichever is lowest is the highest you can turn your head unit to before clipping begins

... we have not tested the rca outputs yet but odds are they will not be as low of a clip as the high levels

... to test front and rear output rcas the probe will go inside the whole if using the female end or on the tip if using the male end

.... the aligator clamp will connect to the outer shielding of the rca or i believe a ground will work as well if you cannot keep the aligator clamp on

... run a 1khz test tone to see if it clips before the lowest clip level of ur high levels

... if it is higher u r in the clear and if for some reason it clips at a lower volume then that is the highest volume you can tune your amps potentially

... remember to do both front and rear sets of rca outputs as they might be different

... next do your subwoofer output

... do the same as you did for the front and rear rcas but now use a 50hz test tone to see if it clips before the lowest clip level

... if it is higher u r fine and if for some reason it clips at a lower volume then that is the highest volume you can tune your amps to

... so whatever the lowest clip volume was is where you will be tuning ur amps to

... connect your rcas to the appropriate positions on your amps

... now turn ur gains all the way down on ur amps

... disconnect all speaker wires

... for ur sub amp connect the probe to the pos speaker terminal and the aligator clamp to the negative speaker terminal

... run a 50 hz tone and adjust the gains on ur amp at the volume you found you need to tune everything to

... do the same with your speaker amp but with a 1khz test tone

... remember that you need to make sure all ur outputs do not clip if u have multiple channels

.... so test all ur channels and whichever clips at the lowest setting is where u need to set ur gains to

i hope this helps and if u need more info let me know ik there is a lot of info here lol ... also if u are strictly running rcas then u do not have to tune ur high levels with the oscope ... u should disconnect ur speakers as ohm load does not make a difference when it comes to clipping ... if u had an output of 400 wattts at 4 ohm unclipped u would have 800 watts at 2 ohm unclipped

[Sir-Lancelot 216]

Thank you Lucky! That is perfect and I feel pretty comfortable giving this a shot now that you have helped me out.

You are the chit in my book and I appreciate you taking the time to help me out.

Cheers.

I will let you know how it turns out. Gotta go cut grass right now, so maybe tomorrow after lunch.

Oh boy am I glad I found this little sucker.