Displaying data in the Scope mode
R&S NRP
1144.1400.12 4.48
E-2
Active marker.
The active marker can be shifted pixel by pixel using the
(ê)
and
(û)
keys.
The number 1 marks the start of a time window and the number 2 the
end, regardless whether the marker is active or passive.
Passive marker.
Average power for the set time window.
For the following two items, please read
Background information, p.4.12.
Peak power for the set window.
Ratio of peak power to average power for the set time window.
Remote control, configuration
CALCulate[1..8]:FEED[?] "POWer:AVERage ON SWEep[1..4]"
CALCulate[1..8]:FEED[?] "POWer:PEAK ON SWEep[1..4]"
CALCulate[1..8]:FEED[?] "POWer:PTAVerage ON SWEep[1..4]"
Read result
FETCh[1..8]?
Marker –
( )
Edit
Select
ä
Swaps the roles of the active and passive marker.
Gate# –
( )
ä
↔
ä
Selects a time window.
Background information
To ensure accurate measurement of the peak power and the Peak/Avg ratio, two factors must be taken
into account:
1. First of all, the video bandwidth of the power sensor must be greater than the RF bandwidth of the
test signal so that the display of the envelope power characteristic is not corrupted. The video
bandwidth of the Sensors R&S NRP-Z1x and R&S NRP-Z2x is about 100 kHz, allowing the peak
power of many amplitude-modulated signals and also several TDMA signals such as NADC (RF
bandwidth approx. 50 kHz) to be measured. If the RF bandwidth is considerably greater than the
video bandwidth, values displayed for the peak power and the Peak/Avg ratio will generally be too
low.
2. For the peak power measurement, the horizontal resolution should be high enough to allow the
peak value to appear in the diagram as a round cap several pixels wide. Otherwise the displayed
and/or measured value may be too low. The reason lies in the fact that a measurement point repre-
sents the power for a time interval and the average power is assigned by the R&S NRP.
