[Code of Federal Regulations]
[Title 47, Volume 2]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR24.135]

[Page 236]
 
                       TITLE 47--TELECOMMUNICATION
 
                    CHAPTER I--FEDERAL COMMUNICATIONS
                         COMMISSION (CONTINUED)
 
PART 24--PERSONAL COMMUNICATIONS SERVICES--Table of Contents
 
                        Subpart D--Narrowband PCS
 
Sec. 24.135  Frequency stability.

    (a) The frequency stability of the transmitter shall be maintained 
within [plusmn] 0.0001 percent ([plusmn] 1 ppm) of the center frequency 
over a temperature variation of -30[deg] Celsius to +50[deg] Celsius at 
normal supply voltage, and over a variation in the primary supply 
voltage of 85 percent to 115 percent of the rated supply voltage at a 
temperature of 20[deg] Celsius.
    (b) For battery operated equipment, the equipment tests shall be 
performed using a new battery without any further requirement to vary 
supply voltage.
    (c) It is acceptable for a transmitter to meet this frequency 
stability requirement over a narrower temperature range provided the 
transmitter ceases to function before it exceeds these frequency 
stability limits.