Rohde & Schwarz CMU-K20, Operating Manual

Page: 189 / 646

CMU-K20/K21/K22/K23/K24
Signalling: Power Measurements
1115.6088.12 4.111 E-12
Measurement Control (Power Configuration – Control)
The
Control
tab controls the power measurement by determining
•
The
Repetition
mode
•
The
Stop Condition
for the measurement (for burst power vs. time measurements only)
•
The type of measurement curve displayed
(Display Mode,
for burst power vs. time measurements
only)
•
The number of bursts/evaluation periods forming a statistics cycle (for burst power vs. time
measurements only)
•
The measurement
Filter
for
P/t Normal GMSK, P/t Normal 8PSK
and
P/t Multislot
measurements
•
The averaging prescription to obtain the reference power
(Ref. Power Mode
, for
8PSK
measurements only)
•
The
Timing Offset
, the expected modulation
(Modulation View)
and the number of slots measured
(Slot Count)
in the
P/t Multislot
application
•
The number of timeslots measured
(Slot Count)
in the
P/Slot Table
application
•
The number of RF channels measured and their GSM channel numbers
(Channel Count, Meas.
Channels
, for
P/PCL
measurements only)
Besides, it influences the graphical diagrams by adding or removing the
Info Box
or the
Grid.
All settings can be defined separately for the individual applications
P/t Normal GMSK, P/t Normal
8PSK, P/t Multislot, P/Frame, P/Slot Graph, P/Slot Table,
and
P/PCL
. They are described in the section
GSM400/850/900/1800/1900-MS Non Signalling
on page
4.28
ff. The setting of the P/PCL channels is
analogous to the setting via the
Channel
softkey; see section
P/PCL
on page 4.103 .
Note: There is no mode where the mobile transmits access bursts in consecutive TDMA frames.
As a consequence, in the
P/t Access GMSK
application, only one access burst can be
measured (single shot mode) when the mobile attempts a location update (activate the
application before performing a location update). See also explanations at the beginning of
section
Power Measurements on page
4.97
.
Limit Lines (Power Configuration – Limit Lines)
The
Limit Lines
tab defines the limit lines for the burst analysis (applications
P/t Normal GMSK
and
P/t
Access Burst
). Limit lines are a graphical tool for defining and monitoring tolerance values. The tab
provides:
•
An overview of the default limit lines and areas
(Area Info)
•
Definition of the limit lines for the normal bursts section by section
(Upper Limit Line/Lower Limit
Line
The functions of this menu are described in the section
GSM400/850/900/1800/1900-MS Non
Signalling
on page
4.32
ff. In contrast to the
Non Signalling
mode, the
dynamic limit line correction
depends on the actual PCL of the mobile phone. No auxiliary parameter like the fictitious
Template PCL
is defined.
The limit lines for access bursts are defined in analogy to the limit lines for normal bursts. In the remote
control commands, the keyword
[:NORMal]
is to be replaced by
:ABURst
.
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