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DP 6000 DIGITAL PAGING SYSTEM
February 1997
2.7 PERSONAL BLEEP PATTERNS 1 & 2
The transceiver can be programmed to give a specially designed
bleep pattern. Two such bleep patterns can be designed during
installation. The bleep patterns will be produced when the
transceiver is called with the bleep pattern 1 and 2. Personal
bleep patterns can be installed using opcodes 2, 3 and 4.
To design a personal bleep pattern two parameters can be
determined in the operation code; the on/off pattern and a fre-
quency out of two frequencies within a given time frame.
For this purpose the bleep signal is divided in to four time
blocks of 1.06 seconds which are repeated after each other.
A time-block of 1.06 seconds is divided into 8 time frames of
133 msecs. For each time frame of 133 msecs. it is determined
if the bleep should be on or off and for each time frame a
choice is made out of two available frequencies, as shown in
Fig. 8.
If in operation code 2 and 3 in digits P and Q the bit value is 1,
this corresponds with a time-frame of 133 msec during which
the bleep is on.
If in the operation codes 2 and 3 in the digits R and S the bit
value is 1, this corresponds with a time-frame of 133 msecs
during which the frequency is 3463 Hz, the bit value 0 corre-
sponds with a frequency of 2886 Hz.
EXAMPLE 1: (Refer to Figs. 9, 10 & 11)
The normal bleep pattern 1, has a frequency of 2886 Hz and
has a duration of 133 msecs. which is repeated 4 times in 4
seconds (see Fig. 9)
To design this bleep pattern the time-block of 1.06 secs. should
be looked at: Refer to Fig. 10.
For the frequency pattern only the parts where the bleep is
switched on are important.
Therefore in order to ensure that the bleep frequency in the
example is 2886 Hz, the second bit of opcode digit R should
have the value 0, the remaining bits have 'don't are' values.
Therefore we can take for both digits R and S the value 0.
INSTALLATION INSTRUCTION 83
EXAMPLE 2: (Refer to Fig. 13)
In the diagram shown in Fig. 13 a bleep pattern is shown where
both frequencies can be heard.
In the installer mode it is possible to listen to the personal
bleep patterns without calling the transceiver (Refer to
Chapter Service and Installer functions, test mode page 12).
Page 8/29
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