Sound Devices PIX 220, Руководство пользователя и техническая информация

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PIX 220i, 240i, 220, 240 User Guide and Technical Information
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from camera to camera from the beginning to end of the take’s ile. Even if the heads match, the tails
of a take may not.
These drit problems can be mitigated during recording by using a Genlock (or “Sync”) Input on a
camera which takes over the camera’s internal master clock. Wiring several cameras’ Genlock Inputs
together forces all of the cameras to run at the exact same rate with no drit. This same concept ap
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plies to audio recorders using the Word Clock input. Genlock inputs are available only on higher-
end cameras and Word Clock inputs are available on higher-end audio recorders.
Ofset problems are easier to overcome than drit problems. By feeding each recording device with
the same timecode signal, the iles from diferent recording devices can all be in sync and there will
be no ofset in post-production.
The PIX 240i can address the synchronization issues of both ofset and drit (heads and tails) via its
built-in Ambient® Lockit with Genlock Out and Timecode Reader. The PIX 240i’s Ambient® Lockit
features an internal clock which has an accuracy of +/-0.2ppm (½ frame per 24 hours). Numerous PIX
240i recorders can be used to maintain extremely tight synchronization.
Timecode Reader
The PIX 240i includes a timecode reader which can accept incoming SMPTE timecode. The PIX 240i
can read timecode from embedded SDI / HDMI, linear timecode fed into the “TC I/O” BNC con
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nector, or the 5-pin LEMO® connector. The timecode reader is enabled whenever the Setup Menu
option Timecode/Sync

Timecode Mode is set to Ext TC (LTC) or Ext TC (SDI, HDMI) , which
indicates that it will read external timecode.
Timecode Reader operation is useful for simple cases where the PIX 240i’s timecode follows the cam-
era timecode. The timecode/sync of the PIX 240i’s ile will match exactly with the camera’s ile with
zero-drit.
In situations where a consistent ofset is observed between PIX 240i iles and other production
recordings, the PIX 240i can ofset the timecode stamp. The Setup Menu option
Timecode/Sync

File Start TC Offset
allows the user to adjust the frame ofset from -10 to +10 in increments of 1. This
seting does not afect timecode on the PIX 240i’s outputs.
For shoots involving more than one camera or an audio recorder, using the PIX 240i’s Timecode
Generator can be more beneicial than using the Timecode Reader to achieve good heads and tails
sync between all recordings.
Internal Ambient® Lockit: Timecode Generator with Sync Out
The PIX 240i includes an internal Ambient® ACL-203 Lockit which can be used as a master sync/
timecode source for cameras or audio recorders. The Lockit is an ultra-high accuracy sync/timecode
generator with < 0.2 ppm (½ frame per 24 hours) accuracy that is suitable as a master clock in all
levels of productions. With its internal, rechargeable batery, accurate timecode is maintained for up
to 2 hours ater the PIX 240i is powered down. Ater 2 hours, the timecode value is reset. The batery
is recharged automatically.
Multi-camera shoots using cameras that accept genlock input can beneit from the PIX 240i’s built
in Ambient® Lockit as their master sync and timecode source. Each PIX 240i’s iles will have very
tightly synchronized recordings with matching heads and tails.
Additionally, even multi-camera shoots utilizing lower-cost cameras (with no genlock or timecode)
can beneit from the built-in Lockit. By using the Timecode Generator to stamp the beginning of each
ile, the heads of each take will match from several recorders, even if the tails drit due to using non-
genlocked cameras.