Rate Pull Up/Down, FreeWheel, Jam Sync, Trigger Mode

Timecode

Continued from the previous page

•24.00 – This frame rate is used in both ﬁlm and HDTV systems.

•25.00 – Used for PAL video.

•29.97DF – Standard frame rate for NTSC video with wall time matching the drop-frame video time.

•29.97ND – NTSC video with non-drop encoded frames.

•30.00DF – True 30 frame-per-second rate but with drop-frame encoded LTC.

•30.00ND – 30 frames-per-second, non-drop encoded LTC.

Rate Pull Up/Down

Normally a synchronized audio clock is set to be precisely 44,100 Hz, 48,000 Hz, and so on. There are some cases where it is required to run the audio at pull-up or pull-down rates.

The Rate Pull Up/Down options are:

•Off – Normal use

•29.97 Up – If and only if the frame rate is 29.97 (DF or ND), then pull-up the audio clock rate.

•30.00Down – If and only if the frame rate is 30.00 (DF or ND), then pull-down the audio clock rate.

FreeWheel

The HD-P2 FreeWheel setting lets you adjust how many bad, missing, or discontiguous timecode frames should elapse before dropping out of a timecode operation (record or play). The options are from 1 to 20 frames, or Infinite. After a timecode operation has started when FreeWheel is set to Infinite the LTC can be stopped or removed and it will still continue (In this case, you have to press the STOP key or run out of memory space or power to stop the timecode opera- tion).

Jam Sync

When timecode is set to Infinite freewheel, and a valid timecode source is connected, the internal timecode generator is started. While there is a signal, the HD-P2 will continue to follow the external timecode. Should the timecode stop, the internal timecode generator takes over as the timecode reference until one of the following occurs:

•clock source is changed

•freewheel setting taken off of Infinite

•power cycle

This assumes that the internal clock, or something else, does not stop when the LTC is unplugged. You can turn on/off the timecode (via keys) or disable/ enable timecode, and the generator will continue to run.

Trigger Mode

When FreeWheel is not set to Infinite, a timecode opera-

tion will stop if LTC is lost. If LTC restarts, perhaps in a different position, the HD-P2 will either start another timecode operation (Trigger Mode of Auto) or will wait to start another operation until the REC or PLAY keys are pressed (Trigger Mode of Single).

Trigger on Frame

Once a timecode operation has been initiated (by pressing PLAY or REC with timecode on), the operation will start either once any incoming timecode frame is recognized (Trigger on Frame Off) or once a particular timecode frame is recognized (Trigger on Frame On).

Trigger-Frame

If Trigger Mode is set to Single, then you cam specify the particular trigger frame in HH:MM:SS.FF format (Make sure you select Save and press the SELECT key once you have entered the frame number).

Timecode Origin

When a project is created with timecode enabled, it has an initial timecode origin of 01:00:00.00. This deﬁnes the beginning of a 24-hour “timecode day” for the project. If an operation hits the end of the timecode day (e.g. 00:59:59.29, in this case), it is stopped.

Before recording audio into the project, the user can modify the start/stop points of the timecode day to correspond with the range of external timecode that is expected to be used with the project. For example, if the user is using 30 fps code, and sets the timecode origin to 02:00:00.00, the timecode day will range from [02:00:00.00 to 23:59:59.29] and then from [00:00:00.00 to 01:59:59.29]. In this case, a recording at 00:01:30.00 will be towards the end of the 24-hour timecode day instead of near the beginning. This makes “recording over midnight” possible in time of day applications.

Timecode Offset

The HD-P2 can offset incoming timecode up to +/-12 hours during playback. This is useful when the user wants to line up playback with a timecode source that uses a different timecode range than that used to origi- nally record the material into the project. An On/Off selection allows the user to activate and deactivate the offset without having to reenter the numeric offset each time. The word offset appears on the main display when it is On letting the user know at a glance that a timecode offset is currently in effect.

Offset

This entry lets you specify the Timecode Offset in HH:MM:SS.FF format (Make sure you select Save and press the SELECT key once you have entered the offset).

22 TASCAM HD-P2 Owner's Manual