R&S NRP
Data acquisition and parameters (Sensor menu)
1144.1400.12 4.13
E-2
Measuring the power of TDMA signals
The Timeslot mode is an easy-to-configure method for simultaneously measuring average power in
multiple timeslots of a TDMA signal. It is available only with sensors of the R&S NRP-Z1x and
R&S NRP-Z2x families.
This measurement mode can be used only if all timeslots of the TDMA signal are equal in length. Up to
26 timeslots are allowed. A period to be excluded from the measurement can be defined at the begin-
ning and end of each timeslot by using the Excluded from Start and Excluded from End parameters.
Measurement can be started with an external trigger signal or automatically triggered by an internal
signal.
(
Trigger settings, p. 4.24).
Mode dialog box
:
Burst Av,
T’slot… –
( )
ä
↔
ä
Fig. 4-13
Mode dialog box, Timeslot mode
No of Timeslots
–
( )
ä
Number of timeslots on which a simultaneous meas. is to be made.
Remote Control
[SENSe[1..4]][:POWer]:TSLot:COUNt[?] <int_value>
Nominal Width
–
( )
ä
Timeslot length.
When measurements are made on TDMA signals (GSM/EDGE, PDC,
NADC, PMS etc), the nominal timeslot length must be entered here,
i.e. the frame length divided by the number of timeslots.
GSM example:
Frame length:
4.615
ms
No. timeslots:
8
⇒
Nominal width
4.615 / 8 ms
=
576.875
µ
s
Remote Control
[SENSe[1..4]][:POWer]:TSLot:WIDTh[?] <float_value>
Excluded from End –
( )
ä
… from Start
–
( )
ä
These intervals at the start/end of the timeslot whose length is defined
with
Nominal Width
are excluded from the measurement. Measurement
can thus be restricted to the relevant part of a timeslot.
Remote Control
[SENSe[1..4]]:TIMing:EXCLude:STARt[?] <float_value>
[SENSe[1..4]]:TIMing:EXCLude:STOP[?] <float_value>
Tip
For the most common mobile radio standards, the specified parame-
ters can easily be loaded via the "Recall Standard" dialog box in the
File menu. They can also be set interactively in the Scope mode
(
T’slots, p. 4.45).
Mode : Timeslot
