Identify and inventory the items in the transmitter case.

Grasp the wire bundle and unroll the bundle.  (The bundle consists of three wires that are taped together; a black power cord, a gray microphone cable and a white antenna wire)

    

Once unraveled, you will find a household plug at the end of the wire bundle.  Plug this plug in to an electrical outlet.

The white antenna wire extends from the bundle as a black wire that has been wrapped with a bunch of electrical tape.  (The antenna is a thin wire so I had wrapped it with a bunch of electrical tape to help protect it from breaking)

Plug in microphone (There are two locations that you can use to plug in the microphone: one is a black connector that is in the transmitter case towards the back of the transmitter and the other is on the gray wire that is at the plug-end of the wire bundle)  It does not matter which of the two connectors you use, use whichever is closer to where the audio describer is sitting.

      

Plug an earpiece into the receiver units.

Turn the receiver on and walk the theater seating area to check for dead spots in the reception - - if you do find a spot where you do not have good reception, try flipping channels on the receiver to check the reception from the other transmitter in the case.  (Because we had to deal with many variables associated with operating a portable system in multiple venues, there was some considerations to the transmitters in the transmitter case.  We found that there were some times that a building's wiring or nearby TV/Radio stations was enough to knock out the reception for a couple of seats in the theater.  By putting a second transmitter in the transmitter case, that was on a different frequency, we were able extend coverage to those seats.)

If you have a second person with you, you can have them talk into the microphone while you walk the theater listening to one of the receivers. If you do not have a person to help you with checking reception, you can create a feedback loop by taking a second receiver, turning it on, and placing it's earpiece next to the input of the microphone.  As long as you don't have the receiver's volume turned too loud (I usually set the volume to '2'), that high pitched squeal will not damage the earpiece; but it is an un-mistakable audio source that you will definitely know is coming from the transmitters. 

If you are using the feedback loop to test the transmitter, return to the transmitter and turn off the receiver causing the feedback.