[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR90.215]

[Page 394-395]
 
                       TITLE 47--TELECOMMUNICATION
 
                         COMMISSION (CONTINUED)
 
PART 90_PRIVATE LAND MOBILE RADIO SERVICES--Table of Contents
 
                  Subpart I_General Technical Standards
 
Sec.  90.215  Transmitter measurements.

    (a) The licensee of each station shall employ a suitable procedure 
to determine that the carrier frequency of each transmitter authorized 
to operate with an output power in excess of two watts is maintained 
within the tolerence prescribed in Sec.  90.213. This determination 
shall be made, and the results entered in the station records in 
accordance with the following:
    (1) When the transmitter is initially installed;
    (2) When any change is made in the transmitter which may affect the 
carrier frequency or its stability.
    (b) The licensee of each station shall employ a suitable procedure 
to determine that each transmitter authorized to operate with an output 
power in excess of two watts does not exceed the maximum figure 
specified on the current station authorization. On authorizations 
stating only the input power to the final radiofrequency stage, the 
maximum permissible output power is 75 percent for frequencies below 25 
MHz and 60 percent of the input power for frequencies above 25 MHz. If a 
non-DC final radiofrequency stage is utilized, then the output power 
shall not exceed 75 percent of the input power. This determination shall 
be made, and the results thereof entered into the station records, in 
accordance with the following:
    (1) When the transmitter is initially installed;
    (2) When any change is made in the transmitter which may increase 
the transmitter power input.
    (c) The licensee of each station shall employ a suitable procedure 
to determine that the modulation of each transmitter, which is 
authorized to operate with an output power in excess of two watts, does 
not exceed the limits specified in this part. This determination shall 
be made and the following results entered in the station records, in 
accordance with the following:
    (1) When the transmitter is initially installed;
    (2) When any change is made in the transmitter which may affect the 
modulation characteristics.
    (d) The determinations required by paragraphs (a), (b), and (c) of 
this section may, at the opinion of the licensee, be made by a qualified 
engineering measurement service, in which case the required record 
entries shall show the name and address of the engineering measurement 
service as well as the name of the person making the measurements.

[[Page 395]]

    (e) In the case of mobile transmitters, the determinations required 
by paragraphs (a) and (c) of this section may be made at a test or 
service bench: Provided, That the measurements are made under load 
conditions equivalent to actual operating conditions; and provided 
further, that after installation in the mobile unit the transmitter is 
given a routine check to determine that it is capable of being received 
satisfactorly by an appropriate receiver.