SME Digital Modulation
1038.6002.02 2.127 E-13
2.6.3.14 Radiocommunication Service POCSAG
POCSAG is a standard which in its various implementations (e.g. CITYRUF, SCALL) allows convenient
paging. When equipped with the SME-B42 (POCSAG), SME-B11 (DM coder) and SME B12 (DM
memory extension) options, the SME generates call signals complying to the POCSAG standard. All
essential parameters and the message to be transmitted are freely selectable.
Notes:
-
When POCSAG is switched on, all other DM modulations are automatically switched off.
-
The RF frequency is not determined by the POCSAG standard, it has to be set to the
desired value by means of key [FREQ].
POCSAG settings can be accessed via DIGITAL-MOD-POCSAG menu:
FREQUENCY
LEVEL
MODULATION
DIGITAL MOD
LF OUTPUT
SWEEP
LIST
MEM SEQ
UTILITIES
HELP
GMSK
GFSK
QPSK
FSK
4FSK
FFSK
ERMES
FLEX
POCSAG
FREQ
100. 000 000 0
MHz
LEVEL dBm
STATE OFF ON
MODULATION FSK FFSK
DEVIATION 1.5 2.0 3.0 3.5 4.0 4.5 kHz
MOD POLARITY NORM INV
LEVEL ATTENUATION 0.0 dB
BITRATE 512 1200 2400 bps
--------------------MESSAGE---------------------
ADDRESS 1
CATEGORY TONE NUMERIC ALPHANUM
SYNC WORD POCSAG INFORUF
TONE NUMBER A B C D
NUMERIC MESSAGE...
ALPHANUM MESSAGE... CURRENT: USER3
EDIT MESSAGE...
--------------------BIT ERRORS--------------------
ERROR BIT MASK 0
POSITION OF ERRONEOUS WORD 0
---------------MESSAGE GENERATION----------------
FILL-BATCHES BEFORE MESSAGE 0
TIME SLICE 10 sec
RECALCULATE
MODE ALWAYS SINGLE EXT-SINGLE EXTTRIG EXTTRIG-ALWAYS
EXECUTE SINGLE
CLOCK SOURCE INT EXT
- 30.0
Fig. 2-51 Menu DIGITAL MOD-POCSAG
STATE
ON Switch on of POCSAG.
The RF frequency has to be set to the desired value by
means of key [FREQ]. An indication appears in the status
line: "PRE" stands for preamble. "MSGx" stands for
message, the number "x" denotes the current batch, "- - -"
stands for filler data (see POCSAG standard).
IEC-bus command SOUR:POCS:STAT ON
OFF Switch off of POCSAG.
IEC-bus command SOUR:POCS:STAT OFF
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