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Doc No. DCP0000518 JH 12/7/99 rev2
Features Technical Description
• PDA500 provides up to 250m
2
coverage
• PDA1000 provides up to 550m
2
coverage
• Automatic tracking compressor
• Line input
• Mic input
• Hidden controls
• Popular 3pin XLR connectors
• Input peak LED
• Output current meter
• 19” rack mounting case
Operation Instruction Manual
PDA500 & PDA1000
Audio frequency induction
loop ampilifiers
The PDA series are constant current audio
frequency induction loop amplifiers. They use an
advanced and unique floating sense system to
achieve greater efficiency and to correct the
phase problems created by driving an inductor,
whilst also providing exceptional sound quality
The pre amplification stage in the PDA
series incorporates an advanced signal process-
ing system which allows tight control to be main-
tained over the signal. This is achieved with only
minimal degradation of the signal and is unno-
ticeable in normal operation. This is far more
advanced and sophisticated system than that
found in many dedicated signal processing units.
The processor can be switched between
compression and compansion (compression and
expansion). Expansion is limited to 28 dB to
prevent background noise and hiss being ampli-
fied. Compression up to 90dB is available. The
compression ratio is dynamically variable. For
most applications the processor should be set
for compression, however compansion should
be used in installations where there are a large
number of microphones and little or no external
signal processing.
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