Ramsey Electronics FM30, Руководство пользователя

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FM30
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employees with questions that are clearly answered in the rules.
Here are the primary "dos and don'ts" picked from the current FCC Rules, as
of May, 1990. This is only a
brief look at the rules and should not be con-
strued to be the absolute complete legal interpretation! It is up to you to oper-
ate within the proper FCC rules and Ramsey Electronics, Inc. cannot be held
responsible for any violation thereof.
1. In the past, no "two-way communications" use of the 88-108 MHz FM
broadcast band was permitted. This prohibition does not appear in the
current edition of Part 15. Previous editions of Part 15 discussed
"wireless microphones" (such as Ramsey FM-1, FM-4, etc.), while the
June 23, 1989, revision eliminates this discussion in favor of more detail
regarding computer and TV peripherals and other modern electronic con-
veniences. However, it is not immediately clear that the 1989 revision of
the FCC Rules Part 15 necessarily "cancels" previous regulations. Laws
and rules tend to remain in force unless they are specifically repealed.
Also, FCC Rule 15.37 discusses "Transitional Provisions for Compliance
with the Rules," and states in item (c): "There are no restrictions on the
operation or marketing of equipment complying with the regulations in ef-
fect prior to June 23, 1989."
2. It is the sole responsibility of the builder-user of any FM broadcast-band
device to research and fully avoid any and all interference to licensed FM
broadcast transmission and reception. This instruction manual gives you
practical advice on how to do a good job of finding a clear frequency, if
one is available.
3. For some frequency bands, the FCC sets 100 milliwatts (0.1 watt) as the
maximum permitted power output for unlicensed, home-built transmitting
devices, and that the combined length of your antenna and feedline
(coaxial cable or other) must not exceed 10 feet. The technical standards
for 88-108 MHz are very different, primarily concerned with band width
and RF field strength.
4. FCC Rules do not differ for "stereo" or "monaural" transmissions.
5. Broadcasting on the grounds of a school (AM emissions only) is specifi-
cally permitted and encouraged between 525 and 1705 KHz under Part
15.221. Use our AM-1 AM radio broadcast kit for this use.
6. FCC Rule No. 15.239 specifically addresses operation in the 88-108 MHz
FM broadcast band for which your FM30 transmitter kit is designed. How-
ever, this Rule does not, by itself, tell you everything you need to know
about using a device of this kind. Therefore, we are noting a series of
Part 15 regulations which should be observed:
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a. The "bandwidth" of your transmission is limited to 200 KHz, centered
on the actual operating frequency. Since 200 KHz is enough spectrum