On a technical note. Receiving any simulcast signal properly is all about the signal levels. The idea is to capture a single site with enough signal to decode properly. Too good of an antenna or too much signal and you capture multiple sites or run the risk adjacent channel or transmitter interference. Too bad of an antenna and you do not capture the site with enough signal strength for the scanner to lock on and decode properly. What you are aiming for is the sweet spot where one site is strong enough to capture (effect) and decode and any other site is weak enough for the scanner not to 'hear it'. This is why mobile reception can be such a challenge. The signal levels are all over the place and dynamically changing. At home you can tweak the antenna and ATT settings to hit the sweet spot. Experimentation is the only way to find what works for you, your location and system site. Remember what works for one simulcast system site may not work for a different system site because of the factors mentioned above.
Worst case ask here in the forums for advice and suggestions. There are many with operational configurations who can pass along their experience in doing the set up.
