Ambient Controller - ACC 501 - Manual (Page 18)

ACC501
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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.
Please note:
When Tune signal out is “on”, external devices can not be tuned, nor does
“Tune intern” function. This function is exclusively for putting the ACC501 in a
slave mode to be able to tune another unit using it as reference!
Press 0, Lock: Locks out keypad. Release with shift + lock.
4.8
RTC menu
This menu sets the Real Time Clock. The RTC runs from its own battery and X-tal oscillator
and contains all calendar data such as days in the month, leap year etc. It is an independent
on board clock with its own battery and crystal.
Please note: The RTC does not run from the tuned internal reference and is not as
accurate. It is used only to retrieve the actual time of day and the date when
starting the time code generator.
Press 8, Edit: The RTC parameters can be changed or corrected manually.
Press 0, Lock: Locks out keypad. Release with shift + lock.