The station's main signal is located on its third subcarrier.

A main signal controls a train movement along a running line.

My main signal was to get our guys fired up.

The signal indication is the same as for the combined aspects in the main signals.

Fewer than 3 are used if the distance from the previous main signal is too small to install them all.

This will have the same call sign as the main signal and primarily serve the northern portion of the market.

There was one odd section, right at the end of the communication, apparently added after the main signal had been recorded.

These fill in the gaps that the main signal otherwise wouldn't cover well.

Both will have the same call sign as the main signal.

The main signal can have any of the following aspects: