Can I connect an external IR (infrared) receiver directly to the IR input on the back of my receiver?
No, The external IR receiver requires power from an external source. The IR on the back of the recevier does not supply power, a connecting block must be used for distribution. One is the emitter (or Flasher) outputs on the connectiong block then would be connected via mono mini-plug cable to the IR input on the back of the receiver. Please contact the manufacturer of your IR system for more information regarding IR repeating system connections.