Ambient Lockit - ACL 204 - Manual (Page 22)

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For user bits:
- if the GEN>UB>JamUB is set to “manual”
ACN > C- JAM
C-JAM is a continuous jam mode. Set up channel,
antenna, RF power and LNA as above in JAM mode.
When done, select SYNC. In the next display, the
continuous jam is initiated. The device used for
sending the continuous jam command is master.
After sending the continuous jam command, the jam
success or fail of other devices ACL 204 or ACN-TL is
displayed.
Condition for fail is as in JAM mode, see above.
Any ACL 204 or ACN-TL in range that has not been
synced or has an offset bigger than 0.5 seconds will be
jammed. After the initial c-jam, the master sends a
sync command every five seconds. Slave units display
“sync rcvd” and their LED goes to solid green for a
second. If synching fails, the LED goes red and “sync
failed” will be displayed.
The slave Lockits now compare their own time with
the regularly received time stamps and will adjust their
tune value to stay closely in sync with the master, the
system latency is down to half a video line (SD) if all
Lockits are well in tune to each other initially. The
latency in µs, measured time in seconds since start of
c-jam, current tune value, proposed tune value are
displayed in an “expert view” window, accessed by
selecting SYS>INFO and then pushing the toggle switch
to right (line 1). Line 2 is debug info, line 3 used tune value.
In this mode, a unit that was slave and has been power cycled (for instance for changing batteries)
will automatically re-sync when booted. The master unit will be in c-jam mode, but not send sync
signals after reboot. Should it become necessary to reboot the master, a former slave may be used to
initiate the c-jam and become master. This way, the set time code is maintained. It is recommended
though to stay with one master and to re-sync the set after power cycling, this way it can be avoided
to have more than one master on location which may lead to unpredictable errors.