Ambient Controller - ACC 501 - Manual (Page 17)

ACC501
www.ambient.de
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Press 2, Tune intern: This function allows calibrating the controller’s internal
reference oscillator to an external source.
Please make sure “tune signal out” is off, i.e. no wave symbol displayed next to “INT” (see
command # 3).
Press, 1 Ref: Calibrates the controller’s internal oscillator to another Clockit
device’s reference signal such as an ACLxx, ACD301, ALL601, a Sound Devices 7’series
recorder, an Arri Alexa or other 3
rd
party products which have a Clockit system built
in.
After scanning, the DAC value flashes you will be asked to "confirm or edit new tune
value". To confirm, press "Enter". To change values, use the "Up" or "Down" Keys.
The ACC501 automatically rescans .
Repeat tuning until difference is not more than 0.1 ppm, exit by “ESC”
Press 2, Man: Manually shifts the Controller’s internal reference oscillator in
0.15ppm steps.
Press 3, GPS: Calibrates the Controller’s internal reference oscillator to a GPS
source having the 1 second timing pulse.
Repeat tuning until difference is not more than 0.1 ppm, exit by “ESC”
Press 4, LTC: Calibrates the Controller’s internal reference oscillator to an
external LTC. The Controller measures the LTC till enough error has accumulated to
make a calculation to tune the internal reference.
The external time code is scanned for a minute. If this results in a value with low
enough jitter, tuning is continued. If there is too much jitter, the scan is repeated for
a 10 minutes period.
Repeat tuning until difference is not more than 0.1 ppm, exit by “ESC”
Press 5, PAL: The incoming video signal present on the “EXT.SYNC” BNC
connector is scanned, the difference displayed and a new DAC (tune value) proposed.
Press "enter" to write new tune value into memory. Repeat procedure until
difference is not more than 0.1 ppm
Repeat tuning until difference is not more than 0.1 ppm, exit by “ESC”