Sound Devices 702T - Manual (Page 36)

702T User Guide and Technical Information
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v. 2.67 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
current timecode value
menu selection
value to jam, or zeros
press to jam
Jam Value
Press the soft button JAM (tone button) or the Rotary Switch button to jam the user-entered time
code start value into the internal generator.
Edit Value
This menu allows the user to set any valid time code value ( 00:00:00:00–23:59:59:29) for entry with
the jam value selection above. The initial screen of this menu shows the currently set value as well as
the current time code setting of the 702T. Press the soft button labeled EDIT or the Rotary Switch to
select a specific time code value. Time code numbers are changed in pairs (hours, minutes, seconds
and frames). Once (DONE) is selected the value can be “jammed” into the internal generator.
A value is not jammed into the 702T time code generator until JAM VALUE is selected.
User Bits
The 702T has seven user-selectable user bit modes. Time code user bits are a portion of the time code
data which can be allocated several different ways. Commonly, user bits carry information such as
the date, take, sound roll, or the camera roll number.
Highlight EDIT U-BIT in the jam menu and select the soft key EDIT to make change to user-adjust-
able user bits. Highlight Press the soft enter (tone button) or the Rotary Switch to enter user bit edit
mode. The screen will show the format and setting of the user bits. Using the Rotary Switch or the
soft-button up and down arrows, user bit digits can be edited (in pairs). Once DONE is selected, the
user bits are set. If editing is not available in the selected user bit mode “ NO USER EDITS“ will ap-
pear in the screen.
NTSC Standard Definition (SD) Video Production
Audio Chasing Video
With many video productions, the video camera operates in a Rec Run time code mode. This eases
logging of video information and helps eliminate duplicate time code numbers in editorial. One of
the 702T’s external time code modes can be used to write the picture’s time code value to the audio
file.
Drop Frame
NTSC video uses a frame rate of 29.97 frames per second. Unfortunately, that leaves 108 frames per
hour unaccounted. To keep 29.97 time code in sync with “clock” time, the concept of “drop frame”
was devised. Two frames are dropped at the top of each minute not divisible by 10. 54 drops per
hour x 2 frames = 108 frames per hour.
To sync the 702T to a video camera, first determine if the camera is in drop frame or non-drop frame
mode. If you, the DP or the producer are unsure about what setting to use, check with post-produc-
tion, if possible.