Manual remote control at the command generator location shall be provided
to switch between primary and secondary transmission equipment and to
designate either system as primary or secondary.
2.6
RADIO CONTROL SWITCH (RCS) REQUIREMENTS
**************************************************************************
NOTE: The designer must show power wiring details
and voltage for each type of radio switch
installation. Standard radio switch voltages are
24, 120, and 208-240 volts.
**************************************************************************
2.6.1
General
A Radio Control Switch (RCS) shall consis of a microprocessor based printed
circuit board, internal power supply and a control relay. These components
are factory assembled into a single weatherproof enclosure of not more than
1500-cubic-inch exterior volume. It shall be cataloged by the manufacturer
for continuous duty under the following conditions. Ambient dry bulb
temperatures from -22 to 41 degrees C 0 to 105 degrees F and relative
humidity ranges from 0 to 100 percent. The RCS shall be of a design which
permits installation on exterior walls or air-conditioning disconnects
switches. They shall be rated to perform under conditions of constant
vibration and severe weather conditions and to perform without degradation
of service in any manner. The maximum energy demand for a RCS with
transformer shall not exceed 10 volt-amperes.
2.6.2
Addresses
**************************************************************************
NOTE: Coordination with the Director of Information
Management must be accomplished by the designer and
appropriate protocol must be used.
**************************************************************************
Each RCS shall have a fixed address, which is specifically assigned by the
manufacturer. Total possible number of fixed addresses shall be 4,000,000.
The RCS shall utilize the [SA-Digital, Golay23.12d,Single one, Multi-tone,
REMS 100, REMS102, Comverge CV-307 POCSAG format, Post Office Code
Standardization Advisory Group POCSAG 512 AND 1024 Auto Switch, Comverge
SA-205, Comverge SA-206 or the Comverge SA-305/306 code transmission
format.] Radio switches shall be fully compatible with existing radio
switch control message format to allow for full interchangeability of
existing and new switches
2.6.3
Frequency Modulation (FM) Receiver
The Frequency Modulation (FM) Receiver shall be the narrow band, dual
conversion, crystal controlled type with an integral antenna and shall
operate carrier frequency of [139-173 MHz] [_____]. The minimum allowable
frequency deviation shall be +/- 1.0 kHz. Selectivity shall be at least 50
dB down from carrier reference at plus or minus 30 kHz. The frequency
stability shall be +/- 0.002 percent for ambient temperatures of -30 to +60
degrees C -22 to +140 degrees F. Image rejection shall be at least 40 dB.
The receiver shall have a sensitivity of 20 microvolts per meter or less.
Frequency stability shall be within 0.002 percent over the range specified
above.
SECTION 16797A
Page 13
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