First off, Can someone explain the concept of using differential antennas in the first place? Google is not getting me anything useful.
Second, the new data modems that we are installing in department vehicles have 2 antenna ports. The manufacturer says for fixed installations (buildings) that 2 identical omnidirectional antennas should be used, with a minimum of 18 inch spacing. For vehicle installation, either a single antenna (in port 1) or a wired booster (also only connected to port 1) may be used.
Would using two antennas of the same type on the same mounting plane make any difference in signal and functionality in a vehicle installation, or should I just stick with the one antenna.
Each vehicle already has two NMO mounts on the roof. One was from the old data modem, the other was from mobile extenders that we removed... that NMO is just going to be capped anyway.
Second, the new data modems that we are installing in department vehicles have 2 antenna ports. The manufacturer says for fixed installations (buildings) that 2 identical omnidirectional antennas should be used, with a minimum of 18 inch spacing. For vehicle installation, either a single antenna (in port 1) or a wired booster (also only connected to port 1) may be used.
Would using two antennas of the same type on the same mounting plane make any difference in signal and functionality in a vehicle installation, or should I just stick with the one antenna.
Each vehicle already has two NMO mounts on the roof. One was from the old data modem, the other was from mobile extenders that we removed... that NMO is just going to be capped anyway.
