DETAILED OPERATING INSTRUCTIONS |
37
PDM
PDM Operator's Manual Version 2.4a • September 2019
Connect this kind of contact closure or logic pulse to any PDM GPIO input that you’ve desig-
nated as a
Cue
or
Flag
: when a signal is received, it’s linked to the incoming audio sample. It
stays with this sample, no matter how much time manipulation is being applied. You can then
pass the mark to other devices by assigning an appropriate GPIO output.
Cues and Flags usually indicate important programming events such as commercials or news
breakaways. PDM preserves their timing as much as possible, even if the audio that originally
carried them has been dumped.
If you dump audio that contained a Cue or Flag, PDM will send the appropriate signal during
the “splice” between older and newer material in its output stream.
n
Cue marks generate a 250 ms trigger (or other 100 to 1000 ms value, as configured)
when they’re reached.
n
For example, if the network provides a contact closure when it’s time for a local
break, connect it to an input that has
Cue1
assigned. No matter how much delay is
applied, PDM will generate a
Cue1
output when that sample is reached… which you
can use to trigger other equipment to play the break.
n
Flag marks record a continuous logic input. Their output reflects that logic state
when the appropriate audio sample reaches PDM’s output.
n
For example, you can use a Flag to activate a skimmer or logging recorder.
Connect a mic’s tally signal to the input, and use its output to keep the recorder on
whenever the mic is on the air… regardless of how much delay is in use.
f
— Utility GPIOs 1-4 allow you to instantly trigger an input closure and fire it on an output
closure without any delay. This feature is useful for implementing or diagnosing end-to-end
relay logic when connecting PDM to other devices.
TEST”
The GPIO test screen lets you verify that GPIO connections and external remotes are
properly wired.
When you leave the GPIO test screen, the DB-25 outputs are all reset to 0.
Summary of Contents for PDM
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