Compatible sideband transmission

Compatible sideband transmission: Independent sideband transmission in which the carrier is deliberately reinserted at a lower level after its normal suppression to permit reception by conventional AM receivers.

Note: Compatible sideband transmission is usually single-sideband (SSB) amplitude-modulation-equivalent (AME) transmission consisting of the emission of the carrier plus the upper sideband. Synonym amplitude modulation equivalent.

Source: from Federal Standard 1037C and from MIL-STD-188