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