4.4 SPECIFICATIONS .
Transmitter
Channels
53 US/international
Frequency Stability
( 0.001%)
(-20
Frequency Range
Channel Spacing
Power Output
Modulation
156.025 to
25 KHz Increments
25 Watts switchable to 1 Watt into 50 Ohms at 13.6 Vdc
Frequency modulated
at
Modulation Audio Response
Shall not vary
from true 6
pre-emphasis from 300 to
reference 1000 Hz. Audio
3-20 KHz shall be
attenuated (at 1 KHZ by 60 log f/3
Above
by 50dB)
FM Hum
Noise Level
Greter than
below audio
Audio Distortion
Spurious & Harmonic Emssions
Less than 10% at 1 KHz
deviation
Attenuated at least
log P
O
(below rated radiated carrier power)
per FCC Rules Parts 2 80
Antenna Impedance
50 Ohms
Transmitter Protection
Shall survive open or short circuit of antenna system without damage
(10 min.test)
Receiver
Channels
Frequency Range
Frequency Stability
Usable Sensitibivity
10 weather channels
‘156.25 to 163.275 MHz in 25 KHz increments
from -20°C to
for 12dB
Squelch Sensitivity Threshold
or better
1
full squelch
Adjacent Chl Rejection
Greater than 70
Spurious Image Rejection
Greater than 70
Rejection
Greater than 70
1 9
Содержание Apelco 5200
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