Goto Section: 90.213 | 90.215 | Table of Contents
FCC 90.214
Revised as of
Goto Year:1996 |
1998
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:
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----------------
All equipment
Time intervals 1, 2 Maximum frequency -----------------------
--------------------------
difference \3\ 150 to 174 MHz 4
21 to 512 MHz
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----------------
Transient Frequency Behavior for Equipment Designed to Operate on 25 kHz Channel
s
------------------------------------------------------------------------------------------------
----------------
t1 4.............................. &177; 25.0 kHz 5.0 ms
10.0 ms
t2................................ &177; 12.5 kHz 20.0 ms
25.0 ms
[[Page 466]]
t3 4.............................. &177; 25.0 kHz 5.0 ms
10.0 ms
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----------------
Transient Frequency Behavior for Equipment Designed to Operate on 12.5 kHz Channe
ls
------------------------------------------------------------------------------------------------
----------------
t1 4.............................. &177; 12.5 kHz 5.0 ms
10.0 ms
t2................................ &177; 6.25 kHz 20.0 ms
25.0 ms
t3 4.............................. &177; 12.5 kHz 5.0 ms
10.0 ms
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----------------
Transient Frequency Behavior for Equipment Designed to Operate on 6.25 kHz Channe
ls
------------------------------------------------------------------------------------------------
----------------
t1 4.............................. &177; 6.25 kHz 5.0 ms
10.0 ms
t2................................ &177; 3.125 kHz 20.0 ms
25.0 ms
t3 4.............................. &177; 6.25 kHz 5.0 ms
10.0 ms
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----------------
\1\ t on is the instant when a 1 kHz test signal is completely suppressed, including any c
apture time due to
phasing.
t 1 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 differ
ence must not exceed the limits
specified in Sec. 90.213.
3 Difference between the actual transmitter frequency and the assigned transmitter frequenc
y.
4 If the transmitter carrier output power rating is 6 watts or less, the frequency differen
ce during this time
period may exceed the maximum frequency difference for this time period.
[ 62 FR 2040 , Jan. 15, 1997]
Goto Section: 90.213 | 90.215
Goto Year: 1996 |
1998
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