SME SOURce:POCSag
1038.6002.02 3.87 E-13
[:SOURce]:POCSag:POLarity NORMal | INVerted
The command sets the polarity of the modulation.
NORMal The polarity of the modulation is set according to standard POCSAG.
INVerted The polarity of the modulation is inverted.
Example : :SOUR:POCS:POL NORM *RST value is NORM
[:SOURce]:POCSag:TSLice 2 to 120 s
The command determines the length of the time slice. Possible values are: 2 to 120 sec. A
preamble of 576 bits is sent at the beginning of every time slice, followed by the number of filler
batches set with command
POCS:LBAT
. Each batch has the length of 544 bits.
Depending on the settings under commands
POCS:TACT
and
TRIG:DM
, zero, one or two
message batches follow. Then an unmodulated signal is sent up to the end of the time slice.
Due to the fact that only complete code word groups are sent, it is possible that, depending on the
set bit rate, the length of the actual time slice slightly differs from the set value of time slice length.
Example: :SOUR:POCS:TSL 10 *RST value is 10
[:SOURce]:POCSag:TACTion MESSage | STARt | ONCE
This command (Trigger ACT
ion) determines the action which is activated by a trigger event. The
valid trigger events are specified by command TRIGger:DM:SOURce. This command also
defines the allocation between manual and remote-control operations.
MESSage A trigger event switches from filler data output to useful data output for the duration
of a time slice. The filler data are then output again.
STARt Digital modulation is started by a trigger event. Useful data are then continuously
output according to the settings.
This setting is suitable, for example, for a synchronous start of several units.
ONCE The output of a time slice is only started by a valid trigger event. After recognition of
this signal, exactly one time slice is output. After that, the SME waits for its trigger
pulse again (defined under TRIG:DM:SOUR).
Example: SOUR:POCS:TACT MESS *RST value is MESSage
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