Getting Started 1
Keysight U1251B and U1252B User’s and Service Guide 43
Rotary switch position (Function) Primary display Secondary display
(DC voltage)
DC mV Hz (DC coupling)
dBm or dBV
[a]
DC mV
DC mV AC mV
DC mV Ambient temperature C or F
Notes for selecting display with the Dual button:
[a] Reading of dBm or dBV depends on the last review on AC V. If the last review is dBV, the following display will also remain in dBV.
(AC + DC voltage)
[for U1252B]
AC + DC mV Hz (AC coupling)
dBm or dBV AC + DC mV
AC + DC mV AC mV
AC + DC mV DC mV
AC + DC mV Ambient temperature C or F
(DC current)
DC A Hz (DC coupling)
DC AAC A
DC A Ambient temperature C or F
(AC current)
AC A Hz (AC coupling)
AC A DC A
AC A Ambient temperature C or F
(AC + DC current)
[for U1252B]
AC + DC A Hz (AC coupling)
AC + DC AAC A
AC + DC A DC A
AC + DC A Ambient temperature C or F
(DC current)
DC mA Hz (DC coupling)
DC mA AC mA
% (0–20 or 4–20) DC mA
DC mA Ambient temperature C or F
Table 1-8 Selecting display with the Dual button (continued)