Ramsey Electronics FM10C Manual page 27

equipment.

b. The "bandwidth" of your transmission is limited to 200 KHz, centered
on the actual operating frequency. Since 200 KHz is enough spectrum
space for several different FM stations, this is a "generous" limitation
designed to accommodate cruder FM devices. Properly built and ad-
justed, the FM10CA kit operates well within this limit. In fact, its signal
should sound no "wider" than any other FM station when listening on an
ordinary FM radio.

c. FCC Rule 15.215(a) says: "Unless otherwise stated, there are no re-
strictions as to the types of operations permitted under these sections."
This general provision appears to leave you free to use your FM stereo
transmitter in a manner similar to operations of an FM broadcasting sta-
tion, or to use it for any other non-interfering, practical application.

d. FCC Rule 15.5: General conditions of operation: "(b) Operation...is
subject to the conditions that no harmful interference is caused and that
interference must be accepted that may be caused by the operation of
an authorized radio station, by another intentional or unintentional radia-
tor, by industrial, scientific and medical equipment, or by an incidental
radiator. (c) The operator of a radio frequency device shall be required
to cease operating the device upon notification by a Commission repre-
sentative that the device is causing harmful interference."

e. The most specific FCC regulation of 88-108 MHz FM Broadcast band
unlicensed operation is that the "field strength" of the signal must not
exceed 250 microvolts/meter at a distance of 3 meters from the transmit-
ter (FCC rule 15.239). If you have any concern about this emission limit,
have your device checked by a technician with accurate measuring
equipment. Remember that the "field strength" of a signal is determined
as much by the antenna as by the RF output of the transmitter itself.
FM10C 27