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It is the intent of these specifications to provide minimum performance <br />specifications for a single frequency VHF base station. This station will <br />replace a tube type relay controlled base in order to provide extended <br />transmit time and enhance system attack time. <br />. The following equipment will be mounted in a single cabinet not more than <br />40" in height. <br />Transmitter: <br />100% Solid State <br />100 watt RF output (minimum) <br />Continuous duty without blower or other active cooling devices <br />Transmitter Sideband Noise - -90 db <br />Spurious & Harmonics - 85 db below Carrier <br />Frequency - 155.625 Mhz with 146.2 hz CST <br />Receiver: <br />Frequency <br />Squelch <br />Sensitivity <br />Intermodulation Rejection <br />Spurious & Image Rejection <br />- 155.625 Mhz <br />- Continuous Sub-audible tone <br />146.2 hz (4B) <br />- .5 uv for 20 db quieting <br />- -80 db min. <br />- greater than 100 db <br />Control Unit: <br />The control unit shall be equipped to operate the base station <br />over balanced 600 ohm control lines. Two wire DC control will <br />be used with the following control functions: <br />• Receiver Operate - 0 ma <br />Transmit - +12.5 ma <br />Disable Sub-Audible Squelch - -2.5 ma <br />Transmit without Sub-Audible <br />Tone (Paging) - -12.5 ma <br />In addition the station will be provided with a maintenance metering and <br />test panel with intercom capability. <br />r: <br />JWC:car <br />1/12/82 <br />~~ <br />