Rohde & Schwarz CMU-K20, Operating Manual

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Signalling: Receiver Quality CMU-K20/21/22/23/24
1115.6088.12 6.152 E-12
Receiver Quality
The subsystem RXQuality comprises the commands for all receiver quality measurements. The
subsystem corresponds to the main menu Receiver Quality and the associated popup menu Receiver
Quality Configuration.
Important Note: Receiver Quality Measurements with MCS-5 to MCS-9
Receiver Quality measurements on circuit-switched channels using the modulation and coding
schemes MCS-5 to MCS-9 (see
CONFigure:NETWork[:CSWitched]:SMODe:TRAFfic
command) can not be performed in parallel to TX Tests
(POWer...,
MODulation...,SPECtrum)
. The Receiver Quality measurement must be in the READY or
OFF state before a TX Test can be started. Conversely, all TX Tests must be in the READY or
OFF state before a Receiver Quality measurement using MCS-5 to MCS-9 can be started.
General Settings – Subsystem RXQuality...
The subsystem RXQuality... provides settings for all types of receiver quality measurements.
CONFigure:RXQuality[:CSWitched]:BITStream < Mode > Bit Stream BER
CONFigure:RXQuality:PDATa:BITStream < Mode >
<Mode> Description of parameters Def. value Def. unit FW vers.
PR9 |
PR11 |
PR15 |
PR16 2
9
-1 PSR bit pattern
2
11
-1 PSR bit pattern
2
15
-1 PSR bit pattern
2
16
-1 PSR bit pattern
PR9 – V3.10
Description of command Sig. State
This command defines the pseudo random bit sequence that the CMU transmits to the MS during
Receiver Quality measurements.
all
CONFigure:RXQuality:CONTrol:HTIMe <AGCTime>, < SynchTime> AGC Holdoff Time, Sync Holdoff Time
<AGCTime> Description of parameters Def. value Def. Unit
0 s to 100 s Automatic gain control 0.5 s
<SynchTime> Description of parameters Def. value Def. Unit FW vers.
0 s to 100 s Bit stream synchronization 0.2 s V2.00
Description of command
This command defines hold off times during which the mobile can adapt itself to the new RF level at the
beginning of the
Receiver Quality measurement and send back the bit stream received.
By reducing the hold off times, the measurement can be speeded up. The default settings for both times do not
depend on the application.
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