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6.8 Changing the displayed units (Unit)
Narda IDA - 3106
103
6.8 Changing the displayed units (Unit)
The frequency range that can be set is determined by the selected units
when IDA antennas are used. Measurements are only possible within the
specified frequency range of the antenna if
units
of
field strength
or
power
density
are selected (see Table 27). This is because no antenna factors are
available outside this range for calculating the field strength or power
density.
You can set the frequency range to any range you like if
units
of
power
level
or
voltage level
are selected (see Table 26). However, the
functionality of the antennas is no longer guaranteed or is severely limited
outside the specified frequency range.
Available units
The following power and voltage units are always available:
The following power or field strength units are additionally available when an
antenna is connected or selected:
Table 26: Selectable units
Units Description
dBm
Power level, referred to 1 mW
dBV
Voltage level, referred to 1 V
dBmV
Voltage level, referred to 1 mV
dBµV
Voltage level, referred to 1 µV
Table 27: Units that can be selected additionally (with antenna)
Units Measured
quantity
Description
dBV/m
Electric field
strength
Expressed as a log. value referred to 1 V/m.
dBmV/m
Electric field
strength
Expressed as a log. value referred to 1 mV/m.
dBµV/m Electric field
strength
Expressed as a log. value referred to 1 µV/m.
dBA/m
Magnetic field
strength
Expressed as a log. value referred to 1 A/m.