Keysight's current list of distributors in Brasil does not mention Nortron:
https://www.keysight.com/main/partnerfinder.jspx?N=1+187629+187535&pageMode=PF&cc=US&lc=eng&tmprop=TMTherefore, I suspect that is the main reason why they are not honoring the warranty.
Having worked in Brasil for years and dealing with this scenario multiple times, I can understand Keysight's position in this matter. They can't possibly know how Nortron stored and handled the equipment after the purchase which, from their standpoint, it was to a final customer and not to a reseller. Official distributors are bound by contract to handle equipment and parts according to the manufacturer's specifications and any issues are resolved among them and the manufacturer - the customer is usually spared of these discussions.
There is also the scenario where Nortron may have been an official distributor at a certain point in time for Agilent - I've seen this happen in the past with NOS units sold years after the break of contract, only for the customer to be left hanging with the expenses of a regular repair.
That said, I have purchased NOS units from a former distributor of Keysight (a store called Fry's electronics) and they not only honored the warranty but updated it to my purchase date. But you must consider it is here in the US, where these things are much easier to settle than in Brasil.
All in all, the suggestion of others to take upon Nortron is the best one - they have spare units, they must honor the mandatory 90-day warranty period and, most important of all, keep the communications flowing at a civil pace with them. The worst scenario you want is to take up to the small claims court (juizado de pequenas causas).
Good luck!
I may be mistaken, but I think this is either a current model or was just recently discontinued? $4K or so is a lot of money for a 100MHz DSO and I'd be expecting a minty-fresh one with the latest firmware and a cal cert that was at least not expired by the time I got it.
Thanks to Brazilian customs office.
Well, thanks to Brazilian tax legislation vultures. Test equipment can benefit from lower import taxes, but very few do that for a lower value item such as this one (when I worked there, somewhere around US$2,000.00 used to be a practical threshold to dive into the rabbit hole of bureaucracy).
The simplified taxation is 60% + sales tax + IPI + COFINS + PIS, which easily doubles the cost of the equipment.