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A.8 MORE QUESTIONS AND ANSWERS
A.8.1 CAN I DO ANYTHING TO IMPROVE LATENCY/AUDIO SYNC?
Latency might be defined as the ‘transit time’ for the a/v stream. Each device in the video chain introduces some limited (transmission) delay.
TriCaster’s latency is very minimal (as little as 1 frame), but you can take measures to keep it to a minimum – first and foremost, by genlocking your video devices – see Section 8.1.2. For genlocked sources, consider disabling TriCaster’s Frame Sync – see Section 8.2.3.
SUPPLEMENTARY QUESTION:
Q: Why does latency seem higher for certain video formats (i.e. 24p, 25p, or 30p)?
A: TriCaster passes frames through the switcher at the appropriate frame rate. When the session format calls for frames at 60Hz, displayed frames are refreshed much more often than (for example) a 24p format. Consequently, apparent latency will also be less than half what it would be at 24Hz.
In general, the lower the frame-rate of the session video format, the higher latency will seem to be.
A.8.2 WHY IS MY POWER SUPPLY BEEPING?
TriCaster 8-input systems provide redundant, replaceable power supply units. When you i) disconnect or ii) power down just one of the modules, or iii), if a PSU
should fail, a beep is sounded to alert you. If you wish, you can mute the alert by pressing the green button on the back of the unit.
FIGURE 401 (8-INPUT TRICASTER SHOWN)
SUPPLEMENTARY QUESTION:
Q: Where can I obtain replacement or spare Power Supply modules?
A: Contact NewTek Customer Support for information on purchasing TriCaster components.
A.8.3 WHY DO SOME THUMBNAIL ICONS LOOK WRONG?
Some file formats (notably AVI) do not provide embedded aspect ratio information. As a result, their thumbnail image in Media Player icons for may not be properly proportioned. Generally the problem does not extend to playback (the DDR will ‘guess’ the aspect ratio correctly).