SERIAL / PARALLEL REMOTE CONTROL |
61
PDM
PDM Operator's Manual Version 2.4a • September 2019
Data Delays
PDM can delay two data streams such as PAD (Program Associated Data), to keep it in sync
with audio. This way, you can make sure “now playing” or other information on RDS receiv-
ers or web streams lines up with program audio. When this feature is turned on, incoming
data is stored for exactly the same amount of time that PDM is delaying audio, and then
sent out.
As audio delay is slowly built or collapsed to return to real-time, each data delay is automat-
ically changed to match. If PDM is put into Bypass mode, data passes straight through.
If you press
DUMP
while Data Delay is on, stored data gets sent out immediately. This
guarantees that important information isn’t lost when audio has been removed.
There are two separate data delays, Data Stream A and Data Stream B, so you can handle
both internal cueing information and PAD for listeners. Inputs and outputs for each can
be RS-232 or IP; IP inputs and outputs can have different addresses and ports, and can
function as client or server. You can mix these types for maximum flexibility.
These choices all appear on the
configuration
page, in the
Delayed Data Streams
section
(
page 46
). Only one input can feed data at a time, but multiple devices can be listening to
delayed data on the outputs.
Two drop down menus lets you choose the stream inputs.
n
Select
Disabled
,
RS-232 port
,
Local network port 5445
(for Stream A) or
5446
(for
Stream B) or
Remote Machine
.
n
If you’ve selected
Remote machine
, supply the IP address and port number of that
machine in the
address
field below.
Outputs have the same choices, except they use
Local network port 5447
for Stream A and
5448
for Stream B.
If you choose
RS-232 port
for delayed data, remember that it’s bi-directional. Data will be
sent on the same RS-232 connector as it’s received: if you have one device generating data
and another one listening, you’ll need a
Y
cable to split the TX and RX signals. This also
applies if you’ve set RS-232 for data.
RS-232 can support only one function at a time. If you choose it for a data stream input,
don’t enable it for the other data stream’s input… unless you want to carry the same data to
different outputs. And if you’re using it for a data stream, don’t enable it for remote control.
Содержание PDM
Страница 78: ......