Ambient ACC 501, User Manual

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experience quality .
ACC501
Rev. 1.10.0031
www.ambient.de/en 15
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 Lockit 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 Lockit 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 timecode 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”
Press 3, Tune signal on/off: For board revisions “A” or later: it is now possible to tune one Controller
from another.
The reference Controller has to send out the “Tune signal”, a 1.92 MHz clock.
When Tune signal out is “on”, a little wave symbol is displayed next to “INT”
Toggle “on – off” by pressing key 3.