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I lost my E5500 Phase Noise System license key. How do I obtain a permanent replacement license key?
In order to obtain a permanent replacement phase noise system license key the phase detector test set (70420A or N5500A) serial number is required.

FAQ 2012-12-20

Fault Detective: Why does my annual license file expire on a date that is not one year from the day I redeemed my license file?
The expiration date for an annual license file is one year plus two weeks from the date of the order.

FAQ 2010-02-25

Fault Detective: Why does my perpetual license file expire on January 31st?
A perpetual license requires a yearly renewal of the license file, at no cost.

FAQ 2010-02-25