Getting Started 1
Keysight U3401A User’s and Service Guide 25
The display at a glance
Figure 1-6 VFD full display with all segments illuminated
The highly visible vacuum fluorescent display (VFD) annunciators are described in
Table 1-1.
Table 1-1 Display annunciators
Annunciator Description
Primary display
S Reading rate: Slow. Not applicable for the U3401A.
M Reading rate: Medium. Not applicable for the U3401A.
F Reading rate: Fast. Not applicable for the U3401A.
PEAK Peak measurement. Not applicable for the U3401A.
HOLD Data hold
MIN MinMax math operation: Minimum value shown on the primary display
MAX MinMax math operation: Maximum value shown on the primary display
REL Relative value
dBm Decibel unit relative to 1 mW
4 2 W 4-wire/2-wire resistance. Not applicable for the U3401A.
Diode test
Audible continuity test for resistance
AUTO Autoranging
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