Digital Modulation SME
1038.6002.02 2.88 E-13
LEVEL ATTENUATION
Input value of the level reduction. The level reduction is internally
controlled by the LEV-ATT bits in the data list or externally via
connector BURST. A logic "1" in the data list causes a level reduction.
IEC-bus command :SOUR:DM:DATA:ALEV 0dB
MODE
Selection of the operating mode for the DATA generator.
AUTO The data are always repeated.
SINGLE The data are sent once as soon as the run has been
started using EXECUTE SINGLE MODE
➤
IEC-bus command :TRIG:DM:SOUR AUTO
SELECT STANDARD...
Opens a window to select one of the standard GMSK modulations
(see Table 2-5). By selecting a standard, the parameters indented
below the line SELECT STANDARD are set according to standard. If
the setting of a parameter is different from the standard, SELECT
STANDARD... CURRENT:USER is displayed.
IEC-bus command :SOUR:DM:GMSK:STAN GSM
BITRATE /FILTER ...
Selection of filtering BxT and bitrate. The following is to choose from:
bitrate = 2.4 kb/s / B×T=0.3; 0.5 bitrate = 20.0 kb/s / B×T=0.5
bitrate=2.5 kb/s / B×T=0.5 bitrate = 24.0 kb/s / B×T=0.5
bitrate = 3.0 kb/s / B×T=0.5 bitrate = 28.8 kb/s / B×T=0.3 ; 0.5
bitrate = 3.6 kb/s / B×T=0.3 ;0.5 bitrate = 32.0 kb/s / B×T=0.3 ; 0.5
bitrate = 4.0 kb/s / B×T=0.3 ; 0.5 bitrate = 38.4 kb/s / B×T=0.3 ; 0.5
bitrate = 4.8 kb/s / B×T=0.3 ; 0.5 bitrate = 40.0 kb/s / B×T=0.5
bitrate = 5.0 kb/s / B×T=0.5 bitrate = 48.0 kb/s / B×T=0.5
bitrate = 6.0 kb/s / B×T=0.5 bitrate = 64.0 kb/s / B×T=0.3 ; 0.5
bitrate = 7.2 kb/s / B×T=0.3 ;0.5 bitrate=67.708kb/s/B×T=0.2;0.3;0.5
bitrate = 8 kb/s / B×T=0.25 ; 0.3 ;0.5 bitrate = 76.8 kb/s / B×T=0.3 ; 0.5
bitrate = 9.6 kb/s / B×T=0.3 ; 0.5 bitrate = 80.0 kb/s / B×T=0.5
bitrate = 10 kb/s / B×T=0.5 bitrate = 160 kb/s / B×T=0.5
bitrate = 12.0 kb/s / B×T=0.5 bitrate=70.833kb/s/B×T=0.2;0.3;0.5
bitrate = 14.4 kb/s / B×T=0.3 ; 0.5 bitrate = 512 kb/s / B×T=0.5
bitrate = 16.0 kb/s / B×T=0.3 ; 0.5 bitrate = 1000 kb/s B×T=0.4
bitrate=19.2 kb/s / B×T=0.3 ; 0.5
The current selection is displayed.
IEC-bus commands :SOUR:DM:GMSK:FILT 0.3; BRAT
8kb/s
DIFF ENCODER
Switching on/off the GSM difference coding.
IEC-bus command :SOUR:DM:GMSK:DCOD ON
MOD POLARITY
Selection of the polarity of the modulation excursion.
NORM Polarity of the modulation as specified according to GSM.
INV Polarity of the modulation is inverted.
IEC-bus command :SOUR:DM:GMSK:POL NORM
SELECT LIST...
Selection of a list or generation of a new list (cf. Section 2.2.4, List
Editor).
DELETE LIST...
Deletion of a list (cf. Section 2.2.4, List Editor).
FUNCTION
Selection of the editor function for processing the lists (cf. Section
2.2.4, List Editor).
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