Decent scopes (Tek, HP, ilk) often have a calibration port that provides
standard signals to use for calibration on the fly. Typically, these
signals might be 0.1 volt, 1.0 volt and 1 kilocycle per second.
It's easy to just connect the probe to that source and run the vertical and
horizontal switches through their ranges to see if they all agree.
That'll give you an excellent idea whether the scope is performing to spec.
or close to it, without having other signal sources, etc. Be sure and do
this on all channels.
Also, check the intensity and focus for clarity and brightness. Look at the
screen for burned-in lines, and check to see if the controls are smooth and
clean.
Phil C. Sr.
k4dpk
----- Original Message -----
From: "Richards" <jruing@ameritech.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Sunday, February 19, 2012 11:59 PM
Subject: Re: [TenTec] OT: Scopes
Please excuse me if I missed it... but I don't recall anyone explaining
to the unwashed...
What can one do to avoid getting a lemon or broken
or poorly calibrated, or whatever broken, oscilloscope
at the local hamfest ?
This item is beyond my current expertise, but it may not be
forever beyond my grasp. How do I avoid getting stung (other
than to buy something new?) What do I look for if I don't have
my favorite Elmer on hand ?
Thanks.
---------------------------- K8JHR ----------------------------------
On 2/19/2012 2:06 PM, Jim Lowman wrote:
Interesting, Steve! Your memory is much better than mine, since I
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|