User`s guide

2 Making Measurements
Making dB Measurements
48 U1273A/U1273AX User’s Guide
Figure 2-11 dBV display
Press for more than 1 second to exit the dBV function.
Table 2- 6 Rotary switch positions allowing dBV measurements
Legend Default function Function when is pressed
AC V AC V with LPF
AC mV AC mV with LPF
DC V
Cycles between
• AC V,
• AC+DC V, or
• DC V
DC mV
Cycles between
• AC mV,
• AC+DC mV, or
• DC mV
S
h
i
f
t
V
i
e
w
E
s
c
NOTE
A dBV measurement uses a 1 volt reference voltage to compare the
present measurement against a stored relative value. The difference
between the two AC signals is displayed as a dBV value. The reference
impedance setting is not part of a dBV measurement.
Exit
Dual