PSCC Suggests Amendments to VHF Digital Coordination Standards (11/8/12)
Thursday, November 08, 2012 | Comments

The Public Safety Communications Council (PSCC) proposed coordination standards for VHF public-safety digital applications. The recommendations include the following:

• 250-kilometer protection from proposed base station to co-channel and 7.5-kilohertz adjacent channel incumbent mobile licensees

• Incumbent mobile receiver antenna height assumed equal to transmitter antenna height

• Assumption of a 60-meter receiver antenna if receiver antenna cannot be inferred from the previous recommendation

• Proposed digital systems will have a Longley-Rice study conducted at 50 percent time and location and 50 percent probability applied

• A signal level of -110 dBm or greater at the incumbent site will cause the proposed station to fail the protection standard.

In May, PSCC, comprised of four public-safety certified frequency advisory committees, advised the FCC that they will certify TDMA coordinations only for voice emissions because of interference reports in VHF spectrum.

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