Digital Modulation SME
1038.6002.02 2.82 E-13
1. CLOCK MODE BIT
MEM MODE 8M*1
In this mode, X and Y bits are stored serially in the "XMEM" list and
are transmitted via the DATA line. The X bit can be found at the
start address.
2. CLOCK MODE BIT
MEM MODE 1M*3
In this mode, the X and Y bits are also stored serially in the
"XMEM" list and are transmitted via the DATA line. The X bit can
be found at the start address. The LEV-ATT (level reduction) and
the BURST channel can be used.
3. CLOCK MODE SYMB
MEM MODE 1M*3
(DM Coder VAR.4/REV.1 or higher)
In this mode, X and Y bits are stored in parallel in the "XMEM" list
and are transmitted in parallel via the DATA or BURST line. The
LEV-ATT channel can be used for level reduction.
During the serial operating modes 1 and 2 (bit clock) the DM coder and the memory extension are
synchronized with regard to the X and Y bit, if one of the settings (e.g. BITRATE or LENGTH) is
changed. As this synchronization is effected via the trigger input of the memory extension (EXT TRIG),
it is not possible to externally trigger the memory extension. The external trigger mode has to be
switched off (EXT TRIGGER = OFF). If EXT TRIGGER is ON an error message is displayed.
In the parallel operating mode 3 (symbol clock) the synchronization is not required and the memory
extension can be externally started via connector TRIGGER (EXT TRIGGER = ON is allowed).
By selecting list "XMEM", list editor line FUNCTION is replaced by submenu CONFIG XMEM...which
contains the parameters of the memory extension.
Menu selection DIGITAL MOD - „DM“ - CONFIG XMEM...
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
LEVEL dBm
START ADDRESS 1
LENGTH 3
MEM MODE 8M*1 1M*3
EXT TRIGGER ON OFF
EXT TRIGGER SLOPE POS NEG
RECORD DATA
ABORT RECORDING
- 30. 0
SOURCE
PRBS
CLOCK...
LEVEL ATTENUATION MODE
LEVEL ATTENUATION
MODE
SELECT STANDARD...
FILTER / BIT RATE...
DIFF ENCODER
MOD POLARITY
SELECT LIST...
DELETE LIST...
CONFIG XMEM.
..
Fig. 2-40 Submenu DIGITAL MOD-GMSK-CONFIG XMEM...
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