2
Operation and Features
Math Operations
66
U3606B User’s Guide
dBm measurements
The logarithmic dBm (decibels relative to 1 mW) scale is
often used in RF signal measurements. The U3606B takes a
measurement and calculates the power delivered to a
reference resistance (typically 50
Ω
, 75
Ω
, or 600
Ω
). Voltage
measurement is then converted to dBm.
The dBm function is logarithmic, and is based on a
calculation of power delivered to a reference resistance,
relative to 1 mW. The formula used for calculating dBm
measurements is:
You can select the reference resistance value through the
Utility menu. The default setting is 600
Ω
.
N O T E
This math operation applies to voltage measurements only.
dBm
10 log
10
reading
2
reference
resis
ce
tan
(
)
⁄
1
mW
(
)
⁄
(
)
×
=
Enable the dBm function
To disable the dBm function
Содержание U3606B
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Страница 25: ...Introduction 1 Preparing the U3606B U3606B User s Guide 7 Adjust the carry handle 1 2a 3 2b ...
Страница 27: ...Introduction 1 Preparing the U3606B U3606B User s Guide 9 Figure 1 3 Rack mount dimensions ...
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Страница 120: ...3 DC Power Supply Operation Square Wave Operation 102 U3606B User s Guide Enable the output 7 ...
Страница 125: ...DC Power Supply Operation 3 Sweep Functions U3606B User s Guide 107 Connect the load 1 LOAD 3 2 ...
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