Rohde & Schwarz CMU-K20, Руководство по эксплуатации

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Signalling: Receiver Quality Measurements
CMU-K20/K21/K22/K23/K24
1115.6088.12 4.130 E-12
ABORt:RXQuality:BER
STOP:RXQuality:BER
CONTinue:RXQuality:BER
Measurement
configuration
Pressing the measurement control softkey twice opens the popup menu
Receiver
Quality Configuration
(see section
Measurement Configurations (Receiver Quality
Configuration)
on page 4.138 ff.). Besides, a number of hotkeys defining the scope
of the measurement are associated to the measurement control softkey. All settings
are explained in detail in section
Measurement Control (Receiver Quality
Configuration – Control)
on page 4.138 ff.
Application
The
Application
softkey selects the measurement application. The three alternative
applications
BER, BER Average
, and
Neighbor Cells
are displayed in separate
measurement menus. When an application is selected, the corresponding
measurement menu is called up. The configuration settings for both applications,
however, are listed in a common popup-menu (see section
Measurement Control
(Receiver Quality Configuration – Control)
on page 4.138 ff.).
BER
and
BER Average
(=Continuous) are treated as repetition modes in other
measurement groups. The difference in the
Receiver Quality
measurement is that
the basic evaluation period is a speech frame instead of a single burst.
BER
The
BER
hotkey activates the single shot
Receiver Quality
measurement. The
measurement is stopped after one statistics cycle, i.e. after the number of
evaluation periods (frames) set in the configuration menu
Control
(see section
Measurement Control (Receiver Quality Configuration – Control)
on page 4.138 ) or
if a stop condition is met. A measurement that has been stopped is indicated by
the status display
HLT
in the associated softkey.
BER should always be used if only a single measurement result is required under
fixed conditions.
Remote control
No explicit switchover command. All single shot measurements are identified by the
2
nd
/3
rd
level keywords
...RXQuality:BER...
BER
Average
The
BER Average
hotkey activates the continuous Receiver Quality measurement.
The measurement runs until it is stopped explicitly, or until the stop condition is
met. A continuous average over the selected number of evaluation periods
(frames) is calculated. An ongoing measurement is indicated by the status display
RUN in the associated softkey.
Remote control
No explicit switchover command. All continuous measurements are identified by the
2
nd
/3
rd
level keywords
...RXQuality:BAVerage...
Neighbor
Cells
The
Neighbor Cells
hotkey displays the neighbor cells reported by the mobile. The
output contains up to 6 neighbor cells together with the received signal level of
signals from these cells (RxLevel, see
Table 4-8
on page 4.137 ).
Remote control
[SENSe:]RREPorts:NCELl?
BLER
The
BLER
hotkey activates the Block Error Ratio (BLER) measurement on packet
data channels. The CMU transmits RLC blocks and can measure the BLER in all
receive timeslots of the MS.
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