This guide is used to define the different types of Infra Red Emitter Probes (IREP) on the market. Mostly used for home or commercial automation, IREP's are great for one-way control of a device that does not require feedback. IR wire runs can be extended to 1000 ft. with ordinary twisted pair cable.

TIP: You can test an IR emitter or IR remote by pointing it towards a camera lense and looking for it to blink or emit a white light. In the field, I normally use my camera phone to help troubleshoot all IR problems.

In the following examples, we will reference the Crestron product line.

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STIRP                      This IREP has a 3.5mm mono plug terminated at the end. It is commonly used with the Crestron ST-CP


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CNXIRP                 This IREP has a 2-terminal type Phoenix connector at the end. Commonly used on 1st/2nd gen (X-Series) Crestron proccessors such as the CNMS, CNMS
                                                                   II/CNMSX-AV, CNMSX-PRO


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IRP2                      This IREP has a "mini" 2-terminal Phoenix connector at the end. Used on 3rd gen (2-Series) Crestron proccessors such as the AV2, PRO2, MP2E, CP2E, etc.


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Dual IR Emitter       This IREP has a 3.5mm mono plug plug terminated at the end. Commonly used when you are out of IR ports on your controller and you need to "double up".

*** Programmers usually utilize a single IR port by adding drivers from different manufacturers. For example: A Toshiba VCR and a Sony DVD player sharing the same port. Mismatching allows you to control the particular device w/o the worry of sending a command to the incorrect device. For example: A JVC VCR and a JVC DVD player sharing the same port - since they are from the same manufacturer on some occassions the IR signals are identical. Let's say you wanted to "STOP" the VCR but did not want to stop the DVD player. Sending this IR command on the same port may cause both devices to stop.***


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IR Sprayer      This IREP assembly emits an amplified infrared control signal in a wide "sprayer" pattern, allowing multiple IR-controllable devices. A good example is controlling
                                                               a Lutron Maestro IR Dimmer on a wall. Since most sprayers are powered they have a better range of hitting a target from across the room.

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IR Shield                            This is a protective shield used to cover the IREP to prevent unwanted or stray IR signals. Helps isolate the IR device you need to control and not control other items
                                                                    in the AV rack