My father had a small repair shop in the early 80s and had bought this Oscilloscope for his technician. It ended up in storage for years and he recently gave it to me as he knows i've taken electronics as a hobby of late. So It is about 30 years old. I am really a total noob at using these things, but fortunately I have the operating manual! I hope some of the more seasoned techies here might give me some insights or starter tips about this machine. I also would like your opinions on this particular oscilloscope. Is it good, bad ? Missing some key features? ( its dusty ) It has all kinds of connections, some of which I am not sure about what they do ( I havent read the manual yet but i will ) I tried powering it up and It shows this line, does not seem totally normal, maybe it will require some calibration. ( Just noticed the trace rotate knob on the back, thats probably it! ) Main problem It has is that it came with only one probe, which is broken... It must have come with 2 probes initially but the other one is lost in the abyss of the ages. I need to shop for probes first thing I guess, Or repair the one I have, it is broken on the connector. Does not seem to be possible to use the original connector but I think they sell connectors like that at my local store. Another question is, do I really need 2 probes? ( for monitoring reference voltage or something? ) Or I can do pretty well with one for now? Anyway, pretty excited about this machine. Any input to help me start up with it is appreciated
http://bee.mif.pg.gda.pl/ciasteczkowypotwor/Telequipment/D1010.pdf Pretty old (1980) but otherwise looks pretty good to me. You'd probably want two probes though.
I was looking at the manual and this is a 10mhz bandwidth unit. Seems pretty low by today's standards. What will happen if I try to measure a faster than 10 mhz signal? It wont be able to lock on it? Anyway 10mhz should be good to start me off and do plenty of things as i am mostly working on old consoles. Also, I found these inexpensive probes on Ebay that are rated for 40 mhz, so should be a good choice for my old scope i guess. I do not think I need the fancier, more expensive 100mhz + probes with this machine! Should I just buy those? http://www.ebay.ca/itm/40MHz-Oscill...983?pt=LH_DefaultDomain_0&hash=item2a14dcd427
With a 10Mhz signal, on the fastest timebase, you'll get one cycle per division, which is good enough to take a reading. Over that, one cycle will occupy less than one division, making any readings guesses, not useful for reading frequency values. You'll also find that the display won't be steady, because the trigger circuit will be overwhelmed. As you go higher, the beam will just merge with itself as your approach and exceed the nyquist frequency of the display, at which point you'll just see a fat horizontal bar. Being an analogue oscilloscope, it doesn't need to "lock" on to the signal as such, the voltage on the probe directly steers the beam on the Y axis.
If you drive it with a faster signal that it's designed for, it should still display something - but it will be a filtered representation of the actual signal - so if you fed it with a 20MHz square wave it would probably look more like a sine wave. You would also find that you can't get a detailed look at the signal anyway because the fastest speed on the timebase was selected based on the 10MHz bandwidth. If it's much higher frequency, then you may have problems getting the trigger to work.
Well, I tried using this oscilloscope with my brand new probe and so far my impression is that the machine is faulty I bought a cheap adjustable oscillator from ebay. http://www.ebay.ca/itm/400292172818?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 Connected it to an external regulated 5v PSU. The oscillator seems to work, I measure 2.5VDC with my multimeter on the clock output, as is normal with oscillators. But when I connect it to the oscilloscope I need to set the zoom at 10mv/division before I see anything. And here's what I see. Pretty funky uh? Looks like the footsteps from some alien bird. There is a X5 zoom function on the machine. This part does seem to work properly, heres what it looks like zoomed. I also tried measuring some clock and datalines from my GameGear. I dont remember which was shown in this picture but im getting double the waveform!! Once again I need to set it to 5-10 mV/division before I see the wave properly. Using channel 1 or 2 produces the same results. The SECS/DIV dial also seems to misbehave as it does not give consistent results when I move it around and return it. Although this might be dirty contacts. Im pretty sure this thing has some pretty serious issues but I wish I had access to a known good oscilloscope to learn how to use it properly. What do you guys think?
Wow, That's one old fucker. I did still work on these back in early 90s. Good times Had to use a polaroid cam to take screen shots..lol.
Yeah, the date on it is like 1981 or 1980 So, do you think its a dud? I found this in the local kijiji ads. Think its worth it? http://quebec.kijiji.ca/c-acheter-e...Hz-3-canaux-dual-time-base-W0QQAdIdZ497216595 Its like 5-10 min drive from me.
So I went and bought that 100 mhz oscilloscope after haggling it down to 125$ That new one apparently works great! I have not tested everything but hey Im just starting out with those. One cool thing Is I got the User and Service manual with it Volts and time division all match with what im measuring and it locks automatically on the waveforms, which is great. The other one really has some weird issues, I will keep it around and maybe try to fix it eventually. Maybe it needs recap? After 30years+ that would not be too surprising. Anyway here's my new machine: I am now measuring ripple noise in the 5v rail of my heavily modded game gear. There Is about 100mv p-p ripple in the rail. Is this considered a lot? The picture does not do it full justice, its more detailed than this in truth. This is at 20 mv/div setting. Here the sound output channel background noise. Its pretty noisy. Still at 20mv/div This is what I am trying to get rid of atm.
Looks nice, I also dont know much about oscilloscopes but the guy who sold it to me told me to play with it, try finding clock signals and internet. Must say, I could figure out wich IC was broken on my z80 singleboard computer and my broken SNES has a clock signal, and some data flowing. but thats it.
Did you not compensate the probe with your old scope? It looks very over-compensated, but at least mostly working. Not sure what's with the vertical amplifier if it needs to be set to 10 mV/div. Using a 10x probe right?
By compensation do you mean the small screws on the connector of the probe? If so, no I didnt. When I set the probes at 1x it was not as bad but still had to set it to like .1v/div and use x5 zoom function to get a 5 v oscillator signal to fill the screen. So the vertical amp really has some issues. I will see if I can fix it eventually. I don't have much experience fixing those things though. Bad caps?
