Digital Modulation SME
1038.6002.02 2.100 E-13
2.6.3.10 FFSK Modulation
Menu DIGITAL MOD - FFSK offers access to settings for FFSK modulation.
Menu selection: DIGITAL MOD - FFSK
FREQUENCY
LEVEL
MODULATION
DIGITAL MOD
LF OUTPUT
SWEEP
LIST
MEM SEQ
UTILITIES
HELP
GMSK
GFSK
QPSK
FSK
4FSK
FFSK
FREQ
100. 000 000 0
MHz
L
E
V
EL
dBm
- 30.0
SOURCE
OFF EXT PRBS DATA
PRBS 9 15 20 21 23 Bit
CLOCK... POS /COUPLED
LEVEL ATTENUATION MODE OFF NORM MAX
LEVEL ATTENUATION 0.0 dB
MODE AUTO SINGLE
SELECT STANDARD... CURRENT: POCSAG
BIT RATE 1200 bps
DEVIATION 1.5k 2.0k 3.0k 3.5k 4.0k 4.5k Hz
SELECT LIST... CURRENT: DLIST5
DELETE LIST...
FUNCTION FIIL INSERT DELETE EDIT/VIEV
CONFIG XMEM...
Fig. 2-47 Menu DIGITAL MOD - FFSK (preset setting), fitted with option SME-B11, DM-coder
SOURCE
Selection of the modulation source FFSK.
IEC-bus command :SOUR:DM:TYPE FFSK; SOUR EXT; STAT ON
PRBS
Selection of the Pseudo Random Binary Sequence.
IEC-bus command :SOUR:DM:PRBS 9
CLOCK ...
Opens a window to set the clock parameters. The current settings are
displayed (cf. Section "QPSK modulation").
LEVEL ATTENUATION MODE
Selection of the operating mode for level reduction
OFF The level reduction is switched off.
NORM The level reduction corresponds to the value entered in
LEVEL ATTENUATION. The linear range extends to an
attenuation of approx. 30 dB.
MAX The level reduction is set to a maximum attenuation of
>80dB.
IEC-bus command :SOUR:DM:DATA:ALEV:MODE NORM
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
To Next Page
Loading...
