4 Retrofitting Options
204 Keysight 53210A/53220A/53230A Assembly Level Service Guide
To Retrofit Ultra-High Stability Timebase (Option 010)
Retrofitting to Option 010 (Ultra-High Stability Timebase) must be performed by
technicians at an Keysight Technologies Service Center. Refer to the list of
Keysight Sales and Service offices in the Appendix for the office closest to you.
To order the Ultra-High Stability Option 010, you will need to place an order with
Keysight for 53200U-010 and identify which counter you have (53210A, 53220A,
or 53230A).