Rohde & Schwarz CMU-K20, Operating Manual

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Signalling: Receiver Quality CMU-K20/21/22/23/24
1115.6088.12 6.172 E-12
Description of command
This command defines the levels in all 8 timeslots of the downlink (BS) TCH signal relative to the Reference
Level set via
CONFigure:RXQuality:BLER:CONTrol:PDATa[:TCH]:MSLot:RLEVel
and the
corresponding packet data command. The levels are valid for BLER tests if the MS is set to multislot operation.
The level range quoted above is restricted by the condition that the absolute level (calculated from the reference
level and the relative individual levels) must not exceed the level ranges of the RF connectors.
Example: With output connector RF2 and a default used timeslot level of –85 dBm, the individual levels can be
set in the range –52 dB to +75 dB, corresponding to absolute levels of –137 dBm to –10 dBm.
CONFigure:RXQuality:BLER:CONTrol:DEFault <Enable> Default Settings
<Enable> Description of parameters Def. value Def. unit FW vers.
ON |
OFF The parameters are set to default values
Some or all parameters differ from the default value ON
– V3.10
Description of command
As a setting command with the setting ON this command sets all parameters of the subsystem to default values
(the setting OFF causes an error message).
As a query, this command reads out whether all parameters are set to default values (ON) or not (OFF) .
Measured Values – Subsystem RXQuality:BLER
The subsystem RXQuality:BLER contains the commands for measurement and output of the Block
Error Ratio. The subsystem corresponds to the measurement menu Receiver Quality for the BLER
measurement.
Scalar Results
READ[:SCALar]:RXQuality:BLER? Start single shot measurement and return results
FETCh[:SCALar]:RXQuality:BLER? Read out results (unsynchronized)
SAMPle[:SCALar]:RXQuality:BLER? Read out results (synchronized)
Returned values Value range Def. value Def. unit FW vers.
Progress Time
BLER Overall
Overall No. of RLC Blocks,
BLER Slot 0,
RLC Blocks Slot 0,
...
BLER Slot 7,
RLC Blocks Slot 7,
RLC Data Rate Overall
RLC Data Rate Slot 0
…
RLC Data Rate Slot 7
0.000 % to 100.000 %
0.000 % to 100.000 %
1 to 2000
0.000 % to 100.000 %
0 to 2
32
– 1
0.000 to 100.000 %
0 to 2
32
– 1
0 kbit/s to 80 kbit/s
0 kbit/s to 80 kbit/s
0 kbit/s to 80 kbit/s
NAN
NAN
NAN
NAN
NAN
NAN
NAN
NAN
NAN
NAN
%
%
–
%
–
%
–
kbit/s
kbit/s
kbit/s V3.10
V3.40
Description of command
These commands are always queries. They start a Block Error Ratio test in the continuous repetition mode and
output the measurement results (see also detailed explanation of measured values in chapter 4).
Progress Time
is the relative progress of the BLER measurement. In a single shot measurement the RLC Data Rate is only
available if the number of transferred blocks (command
CONFigure:RXQuality:BLER:CONTrol:RLBCount
)
is larger or equal than 400 times the number of active DL slots.
深圳德标仪器
135-1095-0799