+33 4 7642 9550 www.aaton.com Cantar-X User Manual v2.26 (r13) 2009 April 27
p.13
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Calendar and Sync Times
Time is the essence of a digital audio recorder. Cantar uses
two kinds of time: 'Calendar Time' organizes folders and
files, 'Sync Time' links audio and picture.
Calendar Time
System date and time run on a medium precision clock
which automatically creates the workday folders. This clock
is powered for four to six years by a user replaceable 3V
Lithium CR1220 button battery located below the HDD
compartment.
In STOP, the system date and time displayed on the rectan-
gular screen must be checked for a ±five minute consistency
with the time-zone you are working in; think of it when you
get off of a three-hour flight.
This clock is very important for file management; go to
TECHSET.21 'System Time' and press [ok], a triangle points
to the modifiable digit. Using [jog], select the desired value,
then press the [>] or [<] to move on to the next column, and
so on, [ok] to exit. Power 'OFF' Cantar then back 'ON' for
the CPU to use the new system time.
The Workday is related to the date defined by the calendar
clock but not totally a clone of it. The workday is an interpre-
tation of the 'human' day; its duration can be from 6 AM in
the morning to 3 AM in the deep night next day. If you turn
'OFF' the batteries after midnight, Cantar thinks the operator
has gone to sleep. But if your 'workday' is continued into
the wee hours after a midnight snack, you would probably
not want it to be considered a 'new' workday. That is why
Cantar displays '
New Workday?', giving you the opportunity
to say 'NO'. Note that going to TEST or REC is a way to
say 'YES'.
Thus, if you stop working at 2 AM one day, the audio files
are technically still part of the previous workday. Conversely
if you want to start a new workday right after midnight, just
turn 'OFF' Cantar, then back 'ON' and answer 'YES' or go
to TEST.
Sync Time
At startup you will notice a blinking int c or ext c icon,
depending upon the master (internal clock) or slave (external
clock) mode selected in AUDIO/TC.13 'TC Source'. This
blinking icon reminds you to verify that the same timecode is
running in all of the camera(s) and audio recorder(s).
Four syncing methods can be used:
Method 1
'int c' internal Free-Run master-clock
Set AUDIO/TC.13 'TC Source' to 'Int.Clock'. The internal
TCXO 1 ppm clock keeps the time accurate to within ±one
frame in nine hours; this time is used to stamp the sound files
with the very same TC as the one stamped on the camera's
images. This is the AatonCode method. In the video world
they called it the 'free-run' mode. Once initialized (four
ways) Cantar behaves as an independent master-clock.
• System/Calendar initialization
At startup, Cantar uses the System/Calendar date and time
to immediately initialize its internal high stability,1ppm TCXO,
Sync clock, 'Stc' (System-TC) is displayed in the rectangular
screen. To remind you to sync other equipment around to
the Cantar Sync clock, the 'int c' icon keeps blinking until
you press [shift] [TC jam]. 'Confirm Sys time' is displayed.
• Operator initialization
In case you don't want to use the calendar date and time,
the TCXO clock can be set by the operator, see AUDIO/
TC.18 'OperTc Init'. 'Otc' (Operator-TC) is displayed in the
rectangular screen.
• LTC initialization (from Camera, VTR, GPS, etc.)
Cantar on TEST, press [TC jam] for more than two seconds,
this makes the entered SMPTE LTC jam the Cantar TCXO
clock. 'Jtc' (Jammed-TC) is displayed in the rectangular
screen. [TC jam] has no effect if there is no valid timecode
on the LTC inputs, 'Jam Failed No LTC' appears in the rect-
angular screen and the 'int c' icon continues to blink.
• ASCII initialization (from Aaton OriginC)
Cantar on STOP, its TCXO clock is set by an Aaton OriginC
which also initializes cameras and GMT generators. 'Atc'
(ASCII-TC) appears in the rectangular screen.
STOP 3, TIME & SYNC
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