I recently purchased a AIR-ANT5195P-R antenna to use with a 1240AG AP to do some testing with. When I received the antenna, I noticed it only had one cable coming from it. Why is that and does that mean I should have ordered 2?
Nick if you are not going to use diversity which requires 2 antennas then you can connect your single antenna to the right antenna port. and Disable the left.
From 1242 Config guide.
For one antenna, attach the antenna on the right and set the antenna for right.
Hope this helps