Keysight U1252B - Maintenance; General maintenance; Battery replacement

4 Changing the Default Setting
126 Keysight U1251B and U1252B User’s and Service Guide
Table 4-2 Filter defaults
Parameter
Firmware version
[a]
Default setting
FiLtEr
2.17 and below oFF
2.18 and above oN
[a] Firmware is factory-installed and not field-upgradeable.