[Code of Federal Regulations]

[Title 47, Volume 5]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 47CFR97.311]



[Page 595]

 

                       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]