[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR97.311]

[Page 589]
 
                       TITLE 47--TELECOMMUNICATION
 
                         COMMISSION (CONTINUED)
 
PART 97--AMATEUR RADIO SERVICE--Table of Contents
 
                     Subpart D--Technical Standards
 
Sec. 97.311  SS emission types.

    (a) SS emission transmissions by an amateur station are authorized 
only for communications between points within areas where the amateur 
service is regulated by the FCC and between an area where the amateur 
service is regulated by the FCC and an amateur station in another 
country that permits such communications. SS emission transmissions must 
not be used for the purpose of obscuring the meaning of any 
communication.
    (b) A station transmitting SS emissions must not cause harmful 
interference to stations employing other authorized emissions, and must 
accept all interference caused by stations employing other authorized 
emissions.
    (c) When deemed necessary by a District Director to assure 
compliance with this part, a station licensee must:
    (1) Cease SS emission transmissions;
    (2) Restrict SS emission transmissions to the extent instructed; and
    (3) Maintain a record, convertible to the original information 
(voice, text, image, etc.) of all spread spectrum communications 
transmitted.
    (d) The transmitter power must not exceed 100 W under any 
circumstances. If more than 1 W is used, automatic transmitter control 
shall limit output power to that which is required for the 
communication. This shall be determined by the use of the ratio, 
measured at the receiver, of the received energy per user data bit (Eb) 
to the sum of the received power spectral densities of noise 
(N0) and co-channel interference (I0). Average 
transmitter power over 1 W shall be automatically adjusted to maintain 
an Eb/ (N0 + I0) ratio of no more than 23 dB at 
the intended receiver.

[64 FR 51471, Sept. 23, 1999]