R&S NRP2, User Manual

Page: 151 / 437

Instrument Functions
R&S
®
NRP2
133 User Manual 1173.9157.02 ─ 03
Example:
If measurements are performed on TDMA signals (GSM/EDGE, PDC, NADC, PHS etc),
the nominal timeslot length must be entered here, i.e. the frame length divided by the
number of timeslots.
Table 4-10: GSM signal
Frame length: 4.615 ms
No. timeslots: 8
⇒
Nominal width: 4.615 / 8 ms = 576.875
μ
s
SCPI command:
​
[SENSe<[1]..4>][:
​
POWer]:
​
TSLot:
​
[AVG]:
​
WIDTh
​
on page 276
Excluded from Start / End
Defines the intervals at the start or end of the timeslot which are excluded from the mea-
surement. Measurement can thus be restricted to the relevant part of a timeslot.
SCPI command:
​
[SENSe<[1]..4>]:
​
TIMing:
​
EXCLude:
​
STARt
​
on page 281
​
[SENSe<[1]..4>]:
​
TIMing:
​
EXCLude:
​
STOP
​
on page 281
Fence
Activates the "Fence" function.
Within the measurement period, a "fence", i.e. an exclusion interval, can be set. The fence
is defined by its start time and its length.
In contrast to the numeric "T'slotAv" mode, the definition of fences in the "T'slot" mode is
not restricted to the wideband power sensors of the R&S NRP-Z8x series. Instead, all
power sensors are supported that can be operated in "Trace" mode.
Start / Length of Fence
Sets the start time and length of the fence. The start time refers to the start of the timeslot
SCPI command:
​
[SENSe<[1]..4>][:
​
POWer]:
​
TSLot[:
​
EXCLude]:
​
MID:
​
OFFSet[:
​
TIME]
​
on page 275
​
[SENSe<[1]..4>][:
​
POWer]:
​
TSLot[:
​
EXCLude]:
​
MID:
​
TIME
​
on page 275
4.5.8 Statistics display mode
The R&S NRP-Z8x wideband power sensors allow you to statistically analyze the enve-
lope power as CCDF, CDF or PDF. The measurement either covers one of the four gates
or, if not synchronized with the signal, a user-selectable time interval. The measurement
is repeated until the desired number of samples is attained. You can set the video band-
width in the "Trace" display mode to reduce noise.
Two traces can be indicated in the same measurement window. The second trace - either
from a second sensor or from an internal AWGN (Additional White Gaussian Noise)
source - can be used as reference trace. For CCDF and CDF, the graphical display can
be supplemented by a tabular indication of the statistic values.
Displaying traces