Digital Modulation SME
1038.6002.02 2.94 E-13
2.6.3.8 FSK Modulation
Menu DIGITAL MOD - FSK offers access to settings for FSK modulation. FSK modulation is possible
with or without a filter. The filter can be switched off and allows free setting of the deviation. The
maximum setting depends on the carrier frequency.
Carrier frequency Maximum deviation
< 130 MHz 100 kHz
130 to 187.5 MHz 25 kHz
187.5 to 375 MHz 50 kHz
375 to 750 MHz 100 kHz
750 to 1500 MHz 200 kHz
1500 to 3000 MHz 400 kHz
3000 to 6000 MHz 800 kHz
If option SME-B11 is not installed, FSK modulation is only possible with an external source and without
a filter. The menu indicates the lines SOURCE, DEVIATION and MOD POLARITY.
Menu selection DIGITAL MOD - FSK
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
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: USER
DEVIATION 4.50 kHz
BIT RATE 1.20 kbps
FILTER... OFF
MOD POLARITY NORM INV
SELECT LIST... CURRENT: DLIST4
DELETE LIST...
FUNCTION FIIL INSERT DELETE EDIT/VIEV
CONFIG XMEM...
LEVEL dBm
- 30.0
Fig. 2-45 Menu DIGITAL MOD - FSK (preset setting), fitted with option DM coder SME-B11
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