A numeric readout of signal strength can be seen using the VZAccess Manager by hovering the mouse over the signal strength icon (antenna bars) at the bottom of the program as shown below.
Installation: I selected the "mirror-mount" antenna instead of the roof-mount style because I use my laptop computer at the dinette table, which is located in the aft part of the slide-out. Mounting the roof-mount antenna would have required a long and ugly coax cable to get to the dinette table since the antenna could not be mounted on the slide-out roof. I mounted the mirror-mount antenna to outside edge of the slide-out as shown and drilled a hole through the back side of the slide to route the coax into the cabinet above the dinette. The coax should easily fit between the weather stripping attached to the slide and the trailer. I also ordered an antenna adapter cable that fits my cell phone so that we can use the antenna for voice communications in poor signal areas. Now I just need to try to keep the antenna out of the trees and everything will be just fine.
Performance: After installing the antenna, much to my amazement, I observed virtually no signal strength improvement compared to the built-in antenna. I was wondering if the antenna might be defective as there was a rattle in the plastic enclosure when the antenna was shaken. I continued to test the antenna and was amazed at the difference in the air card's performance. As I write this page, we are camping at
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