Owner`s manual

nanoFlash FAQs
10-Apr-10 ©Convergent Design, Inc. Page 7 of 42
through HD-SDI switchers. PSF formatting does not change your 1080p video
whatsoever, but merely reformats the stream during HD-SDI transmission.
PSF breaks the progressive frame into two segments before HD-SDI transmission. The
first segment contains the odd lines (1,3,5,etc.) of video and the second segment contains
the even lines (2,4,6,etc). The two segments are automatically recombined appropriately
before display and/or compression.
Almost all cameras transmit in 1080psf as opposed to 1080p format. Therefore it is
critically important to set the PSF In and PSF Out checkboxes accordingly. If your
camera is set for 1080p29.97/25/24/23.98 or 1080F mode (in the case of Canon), you will
need to enable (check) the PSF In option to enable progressive mode processing.
Because 1080i59.94 and 1080psf29.97 “look” identical on the HD-SDI bus, nanoFlash
cannot automatically distinguish between the two formats.
If you do not enable “PSF In” your video will be processed as interlaced rather than
progressive, with accompanying negative effects on the image quality. You can always
verify that you have the correct setting by looking at the video format indicator on the
lower left-hand corner of the LCD screen. You should see 1080sf29, 1080sf25 or
1080sf23 if the video source is one of the 1080p formats. Alternatively, if your video
source is 1080i, then the PSF In should not be enabled (unchecked).
Normally, the incoming video is processed through a DDR memory where analog audio
and time-code can be optionally added. However, if you enable E to E direct, then the
incoming HD-SDI stream bypasses this processing and is merely routed from In to Out
with zero delay. E to E Direct eliminates the frame delay of the DDR memory (which can
prevent audio sync issues on the loop-out), but blocks the addition of non-embedded
audio/time-code to the loop-out HD-SDI.
If the incoming source is 1080psf, then we recommend that your always choose E to E
Direct, since the nanoFlash will output 1080p if E to E Direct is not enabled. Many
monitors do not support true “p”, only “psf” video.
PSF Out should be enabled (checked) when connected to an HD-SDI based monitor.
When connected to a DVI/HDMI monitor, PSF Out should not be enabled (unchecked).
Note that psf has no meaning whatsoever in 720p mode, so the selection of psf-in or psf-
out will not affect the video in any manner. Also when recording 1080psf24/23.98 you do
not technically need to select psf-in as nanoFlash will automatically detect this format
(since 1080i48/47.96 is not a valid format). You should check psf-out during playback, as
most monitors do not support true progressive HD-SDI.
22. Can nanoFlash support 2K formats?
No, unfortunately this is not possible.
23. Does nanoFlash have a genlock input?