Keysight U1251B Guia Del Usuario página 128

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