We recommend every 12 months for calibration. It looks like our service group does 17025A and 17025C calibration levels.
If you are interested in calibration please reach out to our service team.
Below you can find the contact information for our Service Department and someone will be happy to help:
Service and calibration information.
800-438-8165
Web: https://www.tek.com/rma-request
Email: rmarequest@tektronix.com
