5
M4DDC User Manual
M4DDC Key Features
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Proprietary TimeLock
TM
Algorithm – Automatically maintains perfect time alignment of the HD
Radio
TM
MPS and HD-1 audio streams.
•
Robust Level-Lock Algorithm – Maintains average audio level differences between the MPS and
HD-1 audio streams to less than 1 dB (content processing dependent).
•
Standalone Operation – 1 RU solution includes an off-air AM or FM receiver, DSP-based
TimeLock
TM
and Level-Lock algorithms and +/- 7.5 second audio delay. Connect a receive
antenna along with your MPS and HD-1 streams and your HD broadcast is automatically
aligned
•
Ballgame Mode – Transmitting in HD Radio
TM
“Ballgame Mode” requires that you smoothly build
in and out of MPS delay without annoying listeners or impacting ratings; protecting the integrity
of Arbitron
TM
PPM watermarking during delay builds and exits and keeps the time-based
structure of your Arbitron PPM watermarking safe.
•
Booster Sync – Perfect time alignment is critical to keeping main signals in sync with boosters
or other transmitters relaying on the same frequency. The M4DDC precision delay lets you
make manual MPS delay offset adjustments in increments as small as a single sample.
•
Built-in Webserver – The M4DDC’s webserver provides complete remote configuration, remote
control and remote Flash-updates over a LAN or WAN using a common web browser.
•
Email and Alarms – Get an email alert direct from your M4DDC for loss of TimeLock and Level-
Lock; rear panel alarm tallies. No PC app is necessary for email functionality.
•
TimeLock Logs – TimeLock proof-of-performance log files are automatically uploaded to your
designated FTP site.
•
HD Radio
TM
Split-Mode Audio Output – Left Channel: HD-1 with Right Channel: MPS. AES-3
on rear panel XLR and front panel headphone output > 1 W into 8-ohms.
•
Audio-Sync Input-Outputs – MPS and HD-1 AES-3 program audio I/O and External Sync Input
on rear panel XLR’s
•
AM or FM Antenna Input - F-type antenna connection and sensitive frequency agile AM or FM
tuner for off-air reception. Please specify AM or FM with your order.
•
Remote Reset – Hard reset via rear panel GPI; recessed front panel reset.
•
Front Panel Lockout – Prevents unauthorized settings changes.
