Digital Modulation SME
1038.6002.02 2.90 E-13
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 GFSK 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:GFSK:STAN DECT
BIT RATE
Input value of the bit rate for the selected standard.
The specified ranges are 10...585 kb/s and 640 ...1170 kb/s.
With settings B×T=0.5 / DEV=14.0 kHz and DEV=25.2 kHz the
specified range is 0.05 to 90 kb/s.
IEC-bus command :SOUR:DM:GFSK:BRAT 1152 kb/s
FILTER / DEVIATION
Opens a window to select different settings with filtering BxT and with
the deviation. The following is to choose from:
B×T=0.5 / DEV=14.0 kHz B×T=0.7 / DEV= 14.4 kHz
B×T=0.5 / DEV=18.0 kHz B×T=0.5 / DEV= 20.0 kHz
B×T=0.4 / DEV= 25.2 kHz B×T=0.5 / DEV=25.2 kHz
B×T=0.5 / DEV=160 kHz B×T=0.5 / DEV=180 kHz
B×T=0.5 / DEV=202 kHz B×T=0.5 / DEV=259 kHz
B×T=0.4 / DEV=288 kHz B×T=0.5 / DEV=288 kHz
B×T=0.6 / DEV=288 kHz B×T=0.5 / DEV=317 kHz
B×T=0.5 / DEV=403 kHz
The values currently set are displayed.
Note:In the RF range from 130 to 187 MHz, deviations >200 kHz are
not possible.
IEC-bus command :SOUR:DM:GFSK:FILT 0.5; DEV 288kHz
MOD POLARITY
Selection of the polarity of the frequency modulation.
NORM Logic "1" generates a positive deviation.
INV Logic "1" generates a negative deviation.
IEC-bus command :SOUR:DM:GFSK: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 to process the selected list (cf. Section
2.2.4, List Editor).
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