interface directly to the UMCS.
**************************************************************************
The command generator shall accept commands from the [UMCS through an EIA
ANSI/EIA/TIA-232-F interface] [energy management software] and shall
generate control signals necessary to activate transmitters and to operate
radio switches over the FM radio channel. The generator shall contain a
digital tone synthesizer and transmitter controller capable of controlling
up to 6 transmitters. Command generator shall be fully compatible with
existing radio switch control message format to allow for full
interchangeability of existing and new switches.
2.5
TRANSMITTER
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NOTE: Coordination with the Director of Information
Management must be accomplished by the designer and
appropriate frequency assignment granted by the
installation.
**************************************************************************
A continuous duty VHF command transmitter shall be provided to transmit at
50 ohms. Frequency stability shall be within 0.0005 percent over the
operating temperature range. Modulation deviation shall be adjustable to
plus or minus 5 kHz. FM hum and noise shall be less than minus 60 dB.
2.5.1
Backup Transmission System
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NOTE: The designer must select the applicable
bracketed text below, depending upon whether
redundant command generators are desired. The
designer must review applicability of switching
between primary and backup transmission systems.
**************************************************************************
[A backup transmitter and antenna shall be utilized to assume the functions
of the primary transmission system in the event of primary transmission
failure. Circuitry shall be provided to detect primary transmission
failure and automatically switch the command generator signal and all
required controls over to the backup transmitter and antenna.] [A backup
command generator, transmitter and antenna shall be utilized to assume the
functions of the primary transmission system in the event of primary
transmission failure. Circuitry shall be provided to detect primary
transmission failure and automatically switch the load shedding signal and
all required controls over to the backup transmission system.]
2.5.2
Failure Indication
Visible and audible indication of [primary] [and] [secondary] transmission
failure shall be provided at the command generator location.
2.5.3
Manual Remote Control
**************************************************************************
NOTE: Remove this paragraph when manual remote
control is not required.
**************************************************************************
SECTION 16797A
Page 12
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