4
APPLICATION PRECAUTIONS
The 780-80 is designed with special circuitry so that is has great immunity to infrared interference caused
by CFL (compact fluorescent light) and other types of high frequency electronically ballasted fluorescent
lights. Because of this, the following precautions must be taken into consideration when using these special
IR receivers:
1.
Do not use more than one 780-80 in a given room or area!
If two or more 780-80's, (or other Xantech CFL friendly IR receiver) receive the same IR signal
simultaneously, the system will not respond.
2.
The 780-80
(or other Xantech CFL friendly IR receivers)
will not operate with Xantech products that
use 679 and RC16 Programmer commands!
This includes models 670, 671, 676, 677, 680, 686 and RT16. For installations using these products,
use standard Xantech IR Receivers, such as the 291, 480, 490, and 780-10 series.
3.
The 780-80
(or other Xantech CFL friendly IR receivers)
do not have much improvement in
operation over the standard Xantech IR Receivers in the presence of magnetically ballasted (60
Hz) fluorescent lighting.
You may choose to use the CFL friendly units in most applications anyway, since they will have
superior rejection to other types of IR interference that may exist in the same installation.
4.
The 780-80 will not operate in 2-wire Phantom Power mode.
TROUBLE SHOOTING
1. The 780-80 has been designed to have high rejection of many sources of interference, such as:
• Compact Fluorescent, Neon or Halogen lights, Neon Art, and light dimmers.
• Direct or reflected sunlight.
• Infrared security sensors (active types).
• RF radiation from TV sets that may be close to the 780-80 IR Receiver.
However, in the presence of extremely intense interference from such sources, you may experience
a reduction in range between the handheld remote control and the 780-80. This may result in a
reduction from over 50 feet to 15 feet or so.
2. To improve the range under these conditions, you need to confirm the source of the interference. Do
this by temporarily turning off TV sets, etc., reducing the exposure of the 780-80 IR Receiver to direct
sunlight and turning off all lights, light dimmers and Infrared security systems. Then check to see if
the range improves.
When you have isolated the interfering source, it will be necessary to move either it or the 780-80 IR
Receiver to improve operation.
3. If the red Talk-Back LED on the 780-80 does not blink when you are sending IR commands from a
remote control, check the following:
• Make sure the power supply is plugged securely into a live 120V AC wall outlet.
• Be sure the +12V, OUTPUT and GND terminals are correctly connected to the resp12V,
IR IN (or SIGNAL) and GND terminals on the connecting block.
• Check to see that all the emitters you are using are good, by substituting known good emitters.
• Models 283 and 286 series emitters will flash when the remote signal is sent, when the system is
operating correctly; Models 282 and 284 series will not. Use Xantech Model 179-99 Test IR to test
for presence of signal when using the 282 and 284 series emitters.
4. If you are sure the emitters are OK, but the components do not respond, reposition the emitter(s). They
may not be located directly over the component’s infrared receiving "window". Consult the owner's
manual of the unit or the manufacturer for the exact location of the infrared "window".
9-5-00
780-80
