[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR90.214]
[Page 348-349]
TITLE 47--TELECOMMUNICATION
CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (CONTINUED)
PART 90_PRIVATE LAND MOBILE RADIO SERVICES--Table of Contents
Subpart I_General Technical Standards
Sec. 90.214 Transient frequency behavior.
Transmitters designed to operate in the 150-174 MHz and 421-512 MHz
frequency bands must maintain transient frequencies within the maximum
frequency difference limits during the time intervals indicated:
------------------------------------------------------------------------
All equipment
Maximum -------------------------
Time intervals \1,2\ frequency 150 to 174 421 to 512
difference \3\ MHz MHz
------------------------------------------------------------------------
Transient Frequency Behavior for Equipment Designed to Operate on 25 kHz
Channels
------------------------------------------------------------------------
t1 \4\........................ 25.0
kHz
t2............................ 12.5
kHz
t3 \4\........................ 25.0
kHz
------------------------------------------------------------------------
Transient Frequency Behavior for Equipment Designed to Operate on 12.5
kHz Channels
------------------------------------------------------------------------
t1 \4\........................ 12.5
kHz
t2............................ 6.25
kHz
t3 \4\........................ 12.5
kHz
------------------------------------------------------------------------
Transient Frequency Behavior for Equipment Designed to Operate on 6.25
kHz Channels
------------------------------------------------------------------------
t1 \4\........................ 6.25
kHz
t2............................ 3.125
kHz
t3 \4\........................ 6.25
kHz
------------------------------------------------------------------------
\1\on is the instant when a 1 kHz test signal is completely suppressed,
including any capture time due to phasing.
t1 is the time period immediately following ton.
t2 is the time period immediately following t1.
t3 is the time period from the instant when the transmitter is turned
off until toff.
toff is the instant when the 1 kHz test signal starts to rise.
\2\ During the time from the end of t2 to the beginning of t3, the
frequency difference must not exceed the limits specified in Sec.
90.213.
\3\ Difference between the actual transmitter frequency and the assigned
transmitter frequency.
\4\ If the transmitter carrier output power rating is 6 watts or less,
the frequency difference during this time period may exceed the
maximum frequency difference for this time period.
[[Page 349]]
[62 FR 2040, Jan. 15, 1997]