Ambient Lockit - ACL 204 - Manual (Page 16)

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SYNC>PPF
The “pulse per frame” is a trigger for the sensor of
certain cameras. The signal is present on pin 3 of Lemo
socket A. 1, 2, 4 periods per frame are available, and
selection if the signal shall start with a rising or falling
edge.
As with any change of the sync settings, the user is
asked to confirm.
SYNC>OFF
The FPGA chip is powered off, no sync signal is
generated. Use this in time code only applications to
save battery life. Confirm by navigating the curser to
“new”.