The FCC released a Report and Order on April 25 confirming that Emission Mask H must be used for digital transmissions in 800 MHz NPSPAC operational channels, which will help protect public safety systems from adjacent channel interference. The FCC stated, ”In this Report and Order, we adopt rules that guard against interference to critical public safety communications in the 800 MHz National Public Safety Planning Advisory Committee (NPSPAC) band (806-809/851-854 MHz) by confirming the emission mask applicable to digital transmissions in the NPSPAC band.”

In an effort to promote interoperability, the Report and Order also requires that the analog FM mode of operation be used on FCC-designated interoperability and mutual aid channels in the VHF, UHF and 800 MHz NPSPAC bands.   The FCC issued a subsequent Erratum slightly modifying a detail in these rules adopted in the R&O.  However, the main requirements remain.