Smpte Modes - M-Audio Portman 4x4 Manual

When the PORTMAN 4x4/S powers up, it enters Patchbay mode
and configures itself to Program 00. It may be switched to other
programs via MIDI Program Change messages. The Program
Change messages must be received at MIDI IN4 and on MIDI
Channel 16 only. These program changes only apply to Patchbay
mode and not Interface mode. When sending Program Change
messages to the PORTMAN's IN4 it will accept program numbers
00 through 31. Above 31, the program numbers wrap-around. For
example, program 32 selects PORTMAN 4x4/S user program 00,
program 33 selects PORTMAN 4x4/S user program 01, etc.
For stand-alone patchbay operation, the PORTMAN 4x4/S may
be left attached to a computer that is turned off. However, the
PORTMAN 4x4/S should always be powered up before the com-
puter. The parallel cable should not be connected or disconnected
while either is powered up.
Important note: Holding the Write Button while powering up
the PORTMAN 4X4/S will reset all internally-stored values to
their factory defaults: all User programs become ALL OUTS =
ALL INS merged, SMPTE User Bits are zeroed, SMPTE
Flywheel is set to 15 and the SMPTE Write Offset is set to
01:00:00:00.

SMPTE Modes

On the right side of the front panel, there are two LEDs which
indicate the current SMPTE mode. When the Read LED is lit, the
PORTMAN 4x4/S has auto-detected the incoming SMPTE format
and is locked to incoming SMPTE time code. The Read LED will
blink rapidly in sync with each frame and therefore blinks slightly
faster for 30/30DF then it does for 24/25 rates. To indicate bad
incoming frames, the LED will blink off for approximately 0.25
seconds for each bad frame.
When the Write LED is lit, the PORTMAN 4x4/S is striping
SMPTE. The Write LED will blink rapidly in sync with each out-
going frame and therefore blinks slightly faster for 30/30DF then
it does for 24/25 rates.
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