Testing Components for Sync Method
Each component must be “Sync Tested” to determine if it will correctly signal the
IntelliControl that it is on or off, using the sync method specified. You cannot assume that
a sync method will work properly. The following notes will alert you to common sync
problems encountered in the field.
Important! Every component, which uses an IR command to turn on or off should be
synced to the IntelliControl, and sync, tested for reliability.
It is a common mistake to omit sync for a component, which uses two separate IR
commands – one command to turn “On”, and a different command to turn “Off”. Without
sync, the IntelliControl will not know that an “Off” command is necessary when the
“System Off” Key is pressed, and the component will not be shut off. Additionally, an
unnecessary delay of 2 seconds will occur every time that component is selected with its
labeled Master Key, even when the system is already on.
Sync Off Delay
It is common for many video components such as VCR’s and DSS receivers to continue
to output video for a few seconds (or longer) after they have been turned off. This creates
a false sync signal and may interfere with reliable operation. It is important to note duration
of the component’s “Sync Off Delay”, and discuss this with the installer and the end user.
If a Master Key is pressed immediately after the “System Off” key is pressed, the false
sync signal may prevent the IntelliControl from turning on that component. To maintain
sync during operation and troubleshooting, it is important that both the installer and the
end user know how long they must wait before the system can be turned back on after a
System Off command has been issued. This problem can be eliminated by including a
delay (of whatever duration necessary) in the Ending Sequence of the “System Off” key.
This problem can reach epic proportions when using an APC-2 to current-sense an LCD
projector. Most LCD projectors require the internal fan to stay on for as long as ten
minutes after the projector is turned off. This may trigger the current sensing device to
send a false sync signal for ten minutes!
Attempt to adjust the current sensing device to reduce the sync delay to a few seconds
after the projector is turned off. If this is not possible, change to a different sync method
(such as the LS-1 Light Sensor).
Testing the Switched AC Outlet
Make sure that the switched outlet actually switches “On” and “Off” with the component’s
“power” command. Two 1995 model Harman Kardon receivers (the base model Pro-Logic
and the base model stereo receiver) and the 1995 base model Denon stereo receivers
advertise “Switched” AC outlets. However these “switched outlets” do not turn on and off
with IR commands. They only switch with the front panel “Power” button. For products with
this type of “psuedo-switched” outlet, a Niles LS-1 Light Sensor or the APC-2 Current
Sensor must be used to provide reliable sync.
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