702T User Guide and Technical Information
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LCD Gain Display
By default, the 702T displays the set Bit Depth and Sampling Rate in the right-hand side of the Main
LCD Display. The gain level for inputs 1 and 2 temporarily override the Bit Depth and Sampling
Rate display while the input gain pots are in use. The LCD display can be set to always display gain
by selecting Gain Only in the Setup Menu option
LCD: GAIN DISPLAY
.
Record Indication
The position of the A-time numbers and time code numbers can be exchanged in the Setup Menu.
When
BIG TIME CODE
is selected in the menu the time code is displayed in the main numeric dis-
play. If time code is turned off A-time is shown as large numbers, even with
BIG TIME CODE
set.
To provide for additional visual indication that recording is in process the big numerals can be set to
reverse contrast or to flash during record. This is menu-selected.
reversed numbers indicating that recording is active
Time Code
The 702T uses time code circuitry developed by Ambient Recording GmbH, a leading developer of
stable, portable time code products (visit Ambient on the web at www.ambient.de). Clock stability
and continuity are critical aspects of the 702T time code implementation. Its temperature-compen-
sated crystal oscillator ensures rock solid TC stability and accuracy (< 0.2 ppm when tuned with an
Ambient Master Controller).
Depending on the stability of other time code devices used with the 702T, time code can be accurate
throughout an entire production day. Typically, a jam sync is performed after each time the camera
is power cycled. In the absence of power, the 702T holds accurate time code for up 2 hours between
battery changes using its internal, rechargeable AA NiMH time code cell. After two hours without
power, the 702T reverts to a less precise time-of-day crystal to maintain the date/time of the unit.
The time code/time-of-day battery is charged from internal or external power whenever the 702T is
powered up.
If the time-of-day clock is reset during the production day or if the time code mode is changed from
24 hour run to another mode and back, the time code value will change. You must re-jam all time
code devices to ensure proper synchronization.
File-based recorders place a single time code stamp in the data header of an AES31 (Broadcast WAV)
file. The 702T generates SMPTE time code from this number and extrapolates it based on the time
code frame rate for playback.
All files generated by the 702T have time code numbers begin on the 0 frame (or 02 in DF modes). If
necessary, pre-roll is dynamically applied to accomplish this. This simplifies synchronization in post-pro-
duction. Furthermore, all files end on the 0 frame such that a file’s duration is always an integer number
of seconds long. If necessary, post-roll is applied to accomplish this.
Sound Devices Wave Agent Beta for Mac OS and Windows computers allows users to add or edit Begin-
ning Time Code Stamps.
See Wave Agent Beta for more details.