Rohde & Schwarz CMU-K20, Руководство по эксплуатации

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Connection Control (Signalling only) CMU-K20/21/22/23/24
1115.6088.12 6.174 E-12
Connection Control (Signalling only)
In the
Signalling
mode, the CMU is able to generate BCCH and TCH signals and to set up a connection
to the mobile. A broad range of signalling parameters can be configured and measurements may be
performed with a connection established.
The remote-control commands presented in this section control the signalling (connection setup and
release, services, signalling parameters), determine the inputs and outputs as well as the reference
frequency. They correspond to the settings in the popup menu of the softkey
Connect. Control
located
to the right of the headline of each main menu.
Important note: Current vs. default values
Some parameters of the CMU can assume two independent values: The default value is used
to set up a connection; it can be modified in the signalling states
Signal Off, Signal On
and
Registered.
The current value is valid during the connection (signalling state
Call Established)
.
Whenever the CMU goes into the
Call Established
state the default value overwrites the current
value. The current value can still be changed during the connection, however, modifying this
current value does not alter the default value. An example for such a double parameter in GSM-
MS is the BS signal level in the used and unused timeslots.
Default values are set with a
CONFigure ...
command, current values are set with the
corresponding
PROCedure ...
command.
Subsystem LEVel (Input Level)
The subsystem
LEVel
controls the level in the RF input signal path. It corresponds to the table section
Analyzer Level
in the
MS Signal
tab of the
Connection Control
menu.
[SENSe:]LEVel:MODE <Mode>
Input Level – Mode
<Mode>
Description of parameters Def. value Def. unit FW vers.
MANual |
PCLevel |
AUTomatic
Manual setting of max. input level
According to power control level of the mobile
Automatic setting corresponding to average power
of signal applied PCLevel
– V1.15
Description of command
This command defines the mode for setting the maximum input level.
[SENSe:]LEVel:MAXimum <Level>
Max. Level
<Level>
Description of parameters Def. value Def. unit FW vers.
–40 dBm to +53 dBm
–54 dBm to +39 dBm
–77 dBm to 0 dBm
Maximum input level for RF1
Maximum input level for RF2
Maximum input level for RF 4 IN +30.0
+30.0
0.0 dBm
dBm
dBm V1.15
Description of command
This command defines the maximum input level. The value range depends on the RF input used and the external
attenuation set (see
[SENSe:]CORRection:LOSS:INPut<nr>[:MAGNitude]
command).
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