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<blockquote data-quote="Henry Cohen" data-source="post: 57890" data-attributes="member: 123">Re: Wireless Intercom Manufacturers (Vendors)?Any chance you could clarify if it&#039;s only the European version?Not quite. CellCom and the FCC certified Acrobat (not the one for the European market) operate in the unlicensed PCS band, 1.92-1.93GHz. This is the guardband between PCS broadband services (1.915-1.92GHz) and licensed PCS downlink band (1.93-1.99GHz), PCS block A (1.93-1.945GHz) being the first adjacent block on the high side. Cellular/PCS carriers do not have the same PCS blocks throughout the country with Verizon and Sprint each having block A in different markets. In those markets where Sprint has PCS block A, their out of band emissions (OOBE) emanating from their towers into the unlicensed PCS band are excessive and cause interference to that band. Markets where Verizon has block A do not exhibit nearly the same levels of OOBE. I&#039;ve been hearing Sprint is beginning to clean it up.When Acrobat was first designed it incorporated a European DECT band RF chipset (1.88-1.90GHz), and this is still the current Euro version. However, in the US, this encompasses the upper half of the licensed PCS uplink blocks (1.85-1.91GHz). So when the first [uncertified] Acrobat systems were brought to the left side of the pond they were clobbered by scores of more powerful nearby handsets transmitting to the tower(s).</blockquote>

[QUOTE="Henry Cohen, post: 57890, member: 123"] Re: Wireless Intercom Manufacturers (Vendors)? Any chance you could clarify if it's only the European version? Not quite. CellCom and the FCC certified Acrobat (not the one for the European market) operate in the unlicensed PCS band, 1.92-1.93GHz. This is the guardband between PCS broadband services (1.915-1.92GHz) and licensed PCS downlink band (1.93-1.99GHz), PCS block A (1.93-1.945GHz) being the first adjacent block on the high side. Cellular/PCS carriers do not have the same PCS blocks throughout the country with Verizon and Sprint each having block A in different markets. In those markets where Sprint has PCS block A, their out of band emissions (OOBE) emanating from their towers into the unlicensed PCS band are excessive and cause interference to that band. Markets where Verizon has block A do not exhibit nearly the same levels of OOBE. I've been hearing Sprint is beginning to clean it up. When Acrobat was first designed it incorporated a European DECT band RF chipset (1.88-1.90GHz), and this is still the current Euro version. However, in the US, this encompasses the upper half of the licensed PCS uplink blocks (1.85-1.91GHz). So when the first [uncertified] Acrobat systems were brought to the left side of the pond they were clobbered by scores of more powerful nearby handsets transmitting to the tower(s). [/QUOTE]

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