Jose,
I have the 2465A and have been through the calibration procedure a few times due to the fact that I messed up when trying to change the battery backup module, which I believe you do not have on the 2465; that's a blessing. The calibration procedure for the 2465A called for a PG506 Calibration Generator and a TG501 Marker Generator for doing the calibration. I looked up the output specs of each and ended up using a good frequency generator and a good pulse generator to duplicate the "standard" output signals of the PG506 and TG501. That worked fine. The test procedure also called for a tunnel diode pulser, which I downloaded the specs for and made one that was suitable enough to get the job done, but I believe that Leo Bodnar makes a pulser that is more than adequate to get the job done and can be purchased from him online. Once I got through all the cal procedures, everything worked fine and all measurements were on target. It was quite a learning experience, but was fun as well.

GerryR
KK4GER