SOURce:FLEX SME
1038.6002.02 3.56 E-13
[:SOURce]:FLEX:STATe ON | OFF
The command switches the FLEX signal on; all other activated DM modulations are switched off.
In contrast to ERMES, the RF frequency is not changed.
Every switchover from OFF to ON results in a recalculation of the memory extension data and
their entry into the list "XMEM" if :FLEX:STATe:AUTO is set to ON. Every change of a FLEX
parameter except for :FLEX:FCONtent requires a recalculation of data, ie after every parameter
change, STATe OFF has to be briefly activated.
Example: :SOUR:FLEX:STAT ON *RST value is OFF
[:SOURce]:FLEX:STATe:AUTO ON | OFF
The command determines whether the FLEX data have to be recalculated after switchover from
FLEX:STATe OFF to STATe ON.
ON The data are recalculated and entered into the memory extension.
OFF The previous memory extension contents are not cleared. This feature can be used
for data generated or altered by an external program and then transmitted into the
memory extension to generate a FLEX telegram. *RST value is ON
Example: :SOUR:FLEX:STAT:AUTO ON
[:SOURce]:FLEX:CYCLe 0 to 14
The command determines which number is assigned to the first cycle after switch on of FLEX.
Frame numbering always starts with 0.
Example: :SOUR:FLEX:CYCL 0 *RST value is 0
[:SOURce]:FLEX:DEViation 2.0 to 10.0 kHz
The command determines the frequency deviation of the modulation. The deviation specifies the
spacing from the carrier for the two far-placed symbols in 4FSK. The FLEX standard specifies
4800 Hz for this value which may be varied for testing.
Example: :SOUR:FLEX:DEV 4.8kHz *RST value is 4800 Hz
[:SOURce]:FLEX:ERRor:MASK 0 to 4294967295
The command determines the erroneous bits in a 32-bit field. The transmitted decimal number
(0...4294967295) is converted internally into a 32-bit binary number and thus defines the 32 bits.
These bits are XORed with the word of the message which is to be falsified and thus determine
which bits of this word are to be transmitted correctly or incorrectly.
Note: XORing precedes block interleaving (see flex standard)! It is carried out in all phases of
all message frames (i.e., the’ X’marked frames under FRAME CONTENTS).
Example:
:SOUR:FLEX:ERRor:MASK 0 *RST value is 0.
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