Goto Section: 90.213 | 90.215 | Table of Contents
FCC 90.214
Revised as of December 4, 2012
Goto Year:2011 |
2013
§ 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:
Time intervals ^1,2 Maximum
frequency
difference ^3 All equipment
150 to 174 MHz 421 to 512 MHz
Transient Frequency Behavior for Equipment Designed to Operate on 25
kHz Channels
t[1] ^4 ±25.0 kHz 5.0 ms 10.0 ms
t[2] ±12.5 kHz 20.0 ms 25.0 ms
t[3] ^4 ±25.0 kHz 5.0 ms 10.0 ms
Transient Frequency Behavior for Equipment Designed to Operate on 12.5
kHz Channels
t[1] ^4 ±12.5 kHz 5.0 ms 10.0 ms
t[2] ±6.25 kHz 20.0 ms 25.0 ms
t[3] ^4 ±12.5 kHz 5.0 ms 10.0 ms
Transient Frequency Behavior for Equipment Designed to Operate on 6.25
kHz Channels
t[1] ^4 ±6.25 kHz 5.0 ms 10.0 ms
t[2] ±3.125 kHz 20.0 ms 25.0 ms
t[3] ^4 ±6.25 kHz 5.0 ms 10.0 ms
^1[on]is the instant when a 1 kHz test signal is completely suppressed,
including any capture time due to phasing.
t[1]is the time period immediately following t[on].
t[2]is the time period immediately following t[1].
t[3]is the time period from the instant when the transmitter is turned
off until t[off].
t[off]is the instant when the 1 kHz test signal starts to rise.
^2During the time from the end of t[2]to the beginning of t[3], the
frequency difference must not exceed the limits specified in § 90.213.
^3Difference between the actual transmitter frequency and the assigned
transmitter frequency.
^4If 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.
[ 62 FR 2040 , Jan. 15, 1997]
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Goto Section: 90.213 | 90.215
Goto Year: 2011 |
2013
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