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Connection Control (Non Signalling only) CMU-K20/K21/K22/K23/K24
1115.6088.12 6.6
E-12
SOURce:RFGenerator:FREQuency[:CHANnel]
<Number>
RF Channel
<Number>
Description of parameters
Def. value
Def. unit
FW vers.
0.2 MHz to 2700 MHz
(see also data sheet)
Input frequency
465 (GSM400)
882 (GSM850)
948 (GSM900)
1845 (GSM1800)
1960 (GSM1900)
MHz
MHz
MHz
MHz
MHz
V1.15
Description of command
This command defines the frequency of the RF signal generated. As an alternative to frequencies, the corre-
sponding GSM channels (with the character string CH annexed to the channel number) can be entered ((259CH
to 293 CH and 306 to 340 for GSM400, 128CH to 251CH for GSM850, 0CH to 124CH or 955CH to 1023CH for
GSM900, 512CH to 885CH for GSM1800, 512CH to 810CH for GSM1900, see GSM channel tables in chapter
4). The assignment of channel numbers and frequencies meets the GSM specification for the downlink (signal
direction from mobile to CMU). The query always returns frequencies.
Subsystem RFGenerator:MODulation
The subsystem
RFGenerator:MODulation
determines an information which is modulated on the RF
signal generated by the CMU and the signal shape. It corresponds to the panel
Generator Modulation
in
the
Generator
tab
in the popup menu
Connect. Control
.
CONFigure:RFGenerator:MODulation:BIT:SELection
<Selection>
Bit Modulation
<Selection>
Description of parameters
Def. value
Def. unit
FW vers.
OFF |
PRBS |
DUMMybursts |
ALL0 |
EALL0 |
EPRBs
No modulation sequence (unmod. carrier)
Pseudo-random bit sequence
GSM dummy bursts
Modulation sequence consisting of zeros
Zeros, 8PSK modulation
Pseudo-random bit sequence, 8PSK mod.
ALL0 –
V1.15
V2.15
(8PSK)
Description of command
The command selects a bit sequence used to modulate the generated signal.
CONFigure:RFGenerator:MODulation:TSEQuence:SELection
<SELection>
Training Sequence
<Selection>
Description of parameters
Def. value
Def. unit
FW vers.
GSM0 to GSM7 |
DUMMy |
ALL0
GSM standard training sequences no. 0 to 7
GSM dummy burst
Training sequence consisting of zeros only
GSM0 –
V1.15
Description of command
The command selects a training sequence used to modulate the signal generated by the CMU.
CONFigure:RFGenerator:MODulation:TRANsmission
<Mode>
Transmission
<Mode>
Description of parameters
Def. value
Def. unit
FW vers.
BURSt |
CONTinuous
Bursted RF signal
Continuous signal (not for 8PSK modulation)
BURSt –
V1.15
Description of command
This command determines whether the CMU generates a burst or a continuous RF carrier signal. An 8PSK-
modulated signal is always bursted.
深圳德标仪器
135-1095-0799
Summary of Contents for CMU-K20
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