Smpte Modes Of Operation; Host Mode; External Mode; Flywheel Mode - E-Mu 1212M Owner's Manual

Sets the transmitted frame rate when striping SMPTE.
Mode (fps)
Edit this field to set the start time in hours:minutes:seconds:frames for
SMPTE Striping
striping SMPTE.
Initiates SMPTE Time Code generation at the SMPTE output beginning at
Stripe Button
the time set in the striping display.
Stops SMPTE striping. This button also stops SMPTE when One-Time Jam
Stop Button
Sync has been initiated.
Selects one of the four Flywheel modes. See the descriptions below.

Flywheel Mode

Sets the SMPTE output level from -10dBV (consumer) to +4dBu (pro).
Output Level
If flywheel mode is on and a dropout is detected this is the number of
FLY/JAM Frames flywheel frames that will be output before the sync card stops and
chases.
Turns word clock termination on or off. Except in special cases, this
Word Clock
Termination control should normally be left on. See
This control selects the source of the SMPTE output jack. The choices are:
SMPTE/MTC
Output Source Host MTC or the SMPTE Input jack (to regenerate SMPTE).

SMPTE Modes of Operation

Host Mode

The host computer is the source of synchronization. MTC messages are sent to the Sync
Daughter Card from the computer application and converted into SMPTE. MTC is also
output from the MIDI port on the Sync Daughter Card.

External Mode

SMPTE messages from SMPTE In are converted to MTC (quarter-frame messages) and
sent to the host application. This happens automatically whenever LTC is received at
the SMPTE input jack. Clean SMPTE data is also transmitted from SMPTE Out if
"SMPTE (Regenerate)" is set.
Flywheel Mode
If the incoming SMPTE data is corrupted or missing frames, MTC code will continue to
be output if "Flywheel mode" is enabled. The flywheel modes are described below.

Flywheel Modes

Upon any dropout, MTC stops and the Sync card monitors the input for
Off
valid code. If valid code is again received, it chases and relocks.
Upon any dropout, MTC continues outputting Quarter-frame messages at
the same rate (flywheeling). When a dropout is detected, this is the
Fixed 0-127 number of frames that will be output before the Sync card stops
outputting MTC and monitors the input for valid code. If valid code is
again received, it chases and relocks.
Upon any dropout, MTC continues outputting Quarter-frame messages at
Continuous the same rate (flywheeling). The Sync card monitors the input for valid
code and continues flywheeling until valid code is received, then relocks.
Upon any dropout, MTC continues outputting Quarter-frame messages at
1-Time Jam Sync the same rate (flywheeling) without monitoring the SMPTE input until the
Stop button is pressed.
E-MU PCI Digital Audio Systems
"Word Clock In/Out".
6 - Appendix
Sync Daughter Card Supplement
91