Marti RPT-30, User Manual

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Installation
Install rack-mounted equipment in a well-ventilated,
well-grounded, and shielded rack cabinet. Do not locate
solid-state equipment in a rack above tube-type
equipment which produces high temperatures.
Problems can also be avoided by locating this unit
away from other equipment which has transformers
that produce strong magnetic fields. These fields can
induce hum and noise into the Marti equipment thus
reducing performance. Strong radio-frequency (RF)
fields should be avoided where possible. Extensive
shielding and filtering have been incorporated into this
equipment to permit operation in moderate RF environ-
ments. All equipment racks, cabinets, etc., should be
bonded together by wide copper grounding strap to
ensure that all system elements are at RF ground
potential.
STATIONARY REMOTE BROADCAST
INSTALLATION
The basic stationary remote installation consists of the
RPT-30 transmitter, a 115 VAC power source, micro-
phones and other audio program sources, and a portable
antenna. Remotes using portable antennas inside build-
ings have very limited range (typically less than one
mile). If greater range is needed, consider locating the
transmitting antenna outside the building at a height
necessary to provide a line-of-sight path to the receiving
antenna. This may not be practical if a great length of
coaxial cable is required. Many broadcasters are using the
Marti mobile relay system to do remotes from inside
buildings. This system consists of the originating
transmitter with its antenna inside the building which
transmits to a “mobile relay” parked outside the building.
The mobile relay consists of a Marti Model AR-10 re-
ceiver and Marti RPT series transmitter with mobile
antennas installed in a vehicle. The AR-10 receiver picks
up the encoded signal originating from the RPT series
transmitter located inside the building, automatically turns
on the relay transmitter (on a different frequency), which
re-transmits the program to the distant receiving antenna
at the radio station studio or transmitter site. (Mobile
relay equipment packages are available from Marti.)
STATIONARY REMOTE INSTALLATION
PROCEDURE
1. The transmitter is normally located near the announcer
or engineer to permit access to gain controls, microphone
inputs, the monitor jack, and metering.
Personnel must not be near the antenna when
radiating. Locate antenna as far as possible from
people and equipment susceptible to RF radiation.
Do not mount antenna directly on transmitter.
Refer to ANSI C95.1 “Limits on Non-Ionizing
Radiation.”
2. With the RPT-30 CONTROL switch in “OFF” posi-
tion, plug the transmitter into a grounded, three-prong,
115 volt, AC outlet.
WARNING
THIS EQUIPMENT MUST BE OPERATED WITH
A 3-PRONG, GROUNDED, 115 VOLT, AC
OUTLET RECEPTACLE!
FAILURE TO USE A PROPERLY GROUNDED
OUTLET COULD RESULT IN A SAFETY HAZ-
ARD OR FAULTY EQUIPMENT PERFORMANCE.
IF AN EXTENSION CORD IS USED, IT
MUST BE THE THREE-WIRE GROUNDING
TYPE TO INSURE SAFETY.
DO NOT CUT OFF THE GROUND PIN OF A
3-PRONG PLUG!
Excessively long extension cords
should be avoided since the voltage
drop can degrade equipment