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18 WX ST.NEW LAYOUT(4279)2a
8/9/00
F requency Ranges
The CO B RA 18 WX ST II tra n s ce i ver re p re s e nts one of
the most adva n ced AM two - way radios used as a Cl a s s
D station in the Ci t i zens Radio Se rv i ce.This unit fe at u re s
A c c e s s o r i e s
a dva n ced Phase Lock Loop (PLL) circ u i t ry prov i d i n g
co m p l e te cove rage of all 40 CB channels and all 10
we ather channels as shown be l ow.
CB
Channel In MHz
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
18
4:25 PM
Page 18
Channel
Channel
Freq.
CB
Freq.
Weather Freq.
Channel In MHz
Channel In MHz
26.965
21
27.215
1
26.975
22
27.225
2
26.985
23
27.255
3
27.005
24
27.235
4
27.015
25
27.245
5
6
27.025
26
27.265
7
27.035
27
27.275
8
27.055
28
27.285
9
27.065
29
27.295
10
27.075
30
27.305
27.085
31
27.315
27.105
32
27.325
27.115
33
27.335
27.125
34
27.345
27.135
35
27.355
27.155
36
27.365
27.165
37
27.375
27.175
38
27.385
27.185
39
27.395
27.205
40
27.405
GENERAL
CHANNELS. . . . . . . . . . . . . . . . . . . . . . . CB - 40 CH
FREQUENCY RANGE. . . . . . . . . . . . . . . CB - 26.965 TO 27.405 MHZ
Weather
FREQUENCY TOLERANCE. . . . . . . . . . 0.005 %
FREQUENCY CONTROL . . . . . . . . . . . . PLL (PHASE LOCK LOOP) SYNTHESIZER
OPERATING TEMPERATURE
RANGE. . . . . . . . . . . . . . . . . . . . . . . . . . . -30° C TO + 65° C
MICROPHONE . . . . . . . . . . . . . . . . . . . . PLUG-IN DYNAMIC
INPUT VOLTAGE . . . . . . . . . . . . . . . . . . 13.8VDC nom.(negative ground)
CURRENT DRAIN
162.550
162.400
162.475
SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7/8"D X 6-3/4"W X 1-7/8" H
162.425
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . .4.25 LBS.
ANTENNA CONNECTOR . . . . . . . . . . . .UHF; SO-239
162.450
METER . . . . . . . . . . . . . . . . . . . . . . . . . . .LED;INDICATES RELATIVE POWER
162.500
162.525
TRANSMITTER
161.650
POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WATTS
161.775
MODULATION . . . . . . . . . . . . . . . . . . . .AM (AMPLITUDE MODULATION)
163.275
FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 HZ
OUTPUT IMPEDANCE . . . . . . . . . . . . . .50 OHMS,UNBALANCED
RECEIVER
SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 1 µV FOR 10dB (S+N)
SELECTIVITY . . . . . . . . . . . . . . . . . . . . . .6 dB @ 7 KHZ,60 DB @ 10KHZ
IMAGE REJECTION . . . . . . . . . . . . . . . . .60 dB, TYPICAL
ADJACENT-CHANNEL REJECTION . . .50 dB, TYPICAL
ATOMATIC NOISE LIMITER . . . . . . . . . .BUILT-IN
WEATHER
SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 1 µV FOR 12 dB SINAD
IF-FREQUENCY . . . . . . . . . . . . . . . . . . . .DUAL CONVERSION
AUDIO OUTPUT . . . . . . . . . . . . . . . . . . .MAXIMUM 1 W AT 10% DISTORTION
FREQUENCY RESPONSE . . . . . . . . . . . .300 – 3000 HZ AT -6 dB
S p e c i f i c a t i o n s
Specifications
WEATHER – 10CH
WEATHER – 161.650 TO 163.275
TRANSMIT: AM FULL MOD.,1.4A (MAXIMUM)
RECEIVE:SQUELCHED, 0.9 A;
FULL AUDIO OUTPUT, 1.2A (NOMINAL)
OUTPUT AND RECEIVED SIGNAL STRENGTH
19
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