Overview R&S
NRP-Z28/-Z98
1170.8966.12 2.2
E-1
Table 2-1
Virtual power meter keys
Button Function
Key
combination
Exit
Terminates the program. The current settings are saved and recalled the
next time the program is started.
Alt + E
W
Selects Watt as the display unit.
Alt + W
dBm
Selects dBm as the display unit.
Alt + M
Zero
Zeroes the power sensor.
Alt + Z
dB
Selects dB as the display unit. This is the log of the ratio of the measured
value to the reference value.
Alt + B
<
%
Selects % as the display unit. The difference between the measured value
and the reference value is expressed as a percentage.
Alt + %
M2Ref
Makes the current measured value the reference value for the relative
display units dB and %.
Alt + R
Offset
On/Off
Turns the global offset correction for the power sensor on or off. If the offset
correction is Off, the
Offset/dB
entry field has a grey background.
Alt + N
Averaging
Man/Auto
Turns auto-averaging on or off. When auto-averaging is on, the
Length
entry
field has a grey background; the current averaging factor is displayed.
Alt + T
Apply
Accepts edited numerical values in the
Frequency/Hz
,
Value/dB
and
Length
entry fields and transfers them to the sensor.
Alt + A
or Enter key
Table 2-2
Virtual power meter entry fields
Entry field
Function
Frequency/Hz
Frequency of the RF carrier in Hertz.
Value/dB
Attenuation in dB of the component connected to the power sensor. The valid range is –100 to 100.
The offset correction must be activated beforehand with the
Offset On/Off
button if this entry field is to
be edited.
Length
Length of the averaging filter (= averaging factor). The valid range is 1 to 65536. Averaging must be set
to manual with the
Averaging Man/Auto
button if this entry field is to be edited.
Scientific notation can also be used for the entry fields. If an invalid entry is made, an error message is
output. An edited numerical value will not be transferred to the power sensor unless you use the
Apply
button or the Enter key to terminate the entry.
