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PDM
PDM Operator's Manual Version 2.4a • September 2019
Installation
PDM fits a standard 19” equipment rack, 1 unit high by 12” deep (allow additional depth for
the connectors).
While PDM doesn’t generate much heat, we recommend at least one unit of blank or perfo-
rated rack panel separating it from any heat-generating devices above or below it. Do not
block the fan or intake vents on the rear of the unit.
n
You can check PDM’s internal temperature using front panel menus (
page 38
),
or via web interface (page 44). As a general guideline, PDM should be within 20°
Fahrenheit (about 7° C) of ambient room temperature
n
PDM’s cooling fan is its only moving part, and must move freely to keep PDM in
normal operating range. If temperature readings appear high, check the fan and air
intake vent immediately.
n
We recommend you check the cooling fan annually, to make sure it’s moving freely
and that dust hasn’t built up.
The internal power supply will self-adapt to any voltage between 100 – 240 v 50/60 Hz. It
consumes 1.8 A maximum; typical draw is about 32 watt @ 120VAC.
We recommend that PDM be connected to a UPS (uninterruptible power supply), to prevent
loss of audio in case of a power disruption. This is good advice for any mission-critical
electrical device.
XLR versions of PDM are normally fed by the Program output of a talk studio. Their
output gets sent to the air chain, master control, or network as appropriate. The talent and
producer should listen to the console’s Program output, rather than the delayed PDM out-
put. Other setups may be appropriate if you’re using routing switchers or an automation
system.
Axia Livewire versions of PDM appear as a normal Source and Destination within Axia’s
setup screens. See the Livewire setup section in this manual for more information.
If your station uses Arbitron PPM, place your PDM unit
before
their encoder in the signal
path. This will ensure PPM encoding is not affected when audio is dumped, or when
delays are being built or exited.
Summary of Contents for PDM
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