Toa EXES-6000, Operating And Troubleshooting

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PARALLEL DATA
The data transmitted or processed parallelly and simultaneously, or constituted of bits arranged in parallel
at a time. To transfer 8-bit data parallelly, for instance, 8 lines are necessary.
PARALLEL TO SERIAL CONVERSION
Opposite to serial to parallel conversion.
See "SERIAL TO PARALLEL CONVERSION".
PHASE ENCODING
In general, a method to record binary data on magnetic recording media. The bit "1" or "0" is recorded by
the inversion of magnetic flux having different phases, as shown below.
For instance, the change of magnetic flux from negative to positive is recorded as "1", and the change
from positive to negative as "0". This method applies to data transmitting and receiving system in
EXES-6000 system.
PI (Paging Interface Unit)
Provides paging functions of PA paging and station paging. It sends out both paging voice signals and relay
Make signals for power remote control of the PA amplifier.
PLL (Phase-Locked Loop) CIRCUIT
Comprises a phase comparator, an LPF (Low-Pass Filter) and a VCO (Voltage Controlled Oscillator). The
phase comparator compares the phase of input signal with that of the output signal from VCO, then
automatically controls the VCO so that both phases, or both frequencies, coincide.
SA (Station Paging Assignment Plug/Unit)
Distributes each of paging outputs to each LM unit.
SA plug is used in EX-610/620, and SA unit in EX-630.
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