Can someone tell the different between u1253A and u1253B?

[Aido4ever]

What the A/B Stand for?
I noticed that every model of Agilent has an A and B version and the only different i see is the color!!!

[insurgent]

Other than the color (I don't know if the skins for the B fit the A), the differences are very slight.
There are slight differences in the AC voltage & AC + DC vs frequency accuracy specs and the input impedance specs. To my little-trained eyes the specs seem a little better on the A model except for the input impedance in dual display mode.

Here's a spec sheet with all the gory details:
http://cp.literature.agilent.com/litweb/pdf/5989-5509EN.pdf

[implor]

Correct me if i'm wrong but isn't the B-series a revision/renewal of the older A-series? about the same specs but with newer modern tec?

[mkissin]

Looking at that PDF, the A series does indeed seem to be very slightly better, but only if you need a 1GR input impedance at voltages less than 1V (as opposed to 10MR), and only if you spend a lot of time measuring AC voltages at greater than 20kHz.