U3401A-ABA AGILENT TECHNOLOGIES, U3401A-ABA Datasheet - Page 56

• Manufacturer Part Number: U3401A-ABA
• Description: English Users And Service Guide 3400
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of U3401A-ABA

• Rohs Compliant: NA
• For Use With: U3400 Series U3401A Dual Display Multimeter

2
38
Operations and Features
dBm
The logarithmic dBm (decibels relative to one milliwatt) scale is often
used in RF signal measurements. The multimeter’s dBm operation takes a
measurement and calculates the power delivered to a reference impedance
(typically 50, 75 or 600 Ω). The formula used for conversion from the
voltage reading is:
dBm = 10 x Log
Figure 2-10 Typical dBm operation display
The default reference impedance value is 600 Ω.. You can select the
following 21 reference impedance values:
2 Ω, 4 Ω, 8 Ω, 16 Ω, 50 Ω, 75 Ω, 93 Ω, 110 Ω, 124 Ω, 125 Ω, 135 Ω, 150 Ω,
250 Ω, 300 Ω, 500 Ω, 600 Ω, 800 Ω, 900 Ω, 1000 Ω, 1200 Ω, 8000 Ω..
The dBm operation can be applied to DCV, ACV and DCV + ACV
measurement functions only. The multimeter displays the dBm modifier on
the primary display and displays the reference impedance selection on the
secondary display.
Procedure 1
1 Press
2 Use
3 Press
and
10
[1000 x (Reading
to enable the dBm operation and read the display.
to enter dBm modifier mode.
to select the desired reference impedance.
2
/ reference impedance)]
U3401A User’s and Service Guide