Icom Ic_r20 Communications Reciever Instruction Manual

							68
12
CONTROL COMMAND 
1112
■GeneralThe IC-R20 can be connected to a PC via the PC’s RS-232C
port using an optional CT-17 
CI-V LEVEL CONVERTOR
. This
allows you to control the receiver from the PC and/or transfer
data from the receiver to the PC.
Control is provided via Icom’s CI-V Communication Interface.
An appropriate application for CI-V command is not sup-
plied from Icom.
■Data formatThe CI-V system can be operated using the following data
formats. Data formats differ according to command numbers.
Adata area is added for some commands.
Controller➡IC-R20
IC-R20➡Controller
qPreamble code (fixed)
wReceiver’s default address
eController’s default address
rCommand number (see table below)
tSub command number (see table below)
yBCD code data for frequency entry
uEnd of message code (fixed)■Command table
FE
FE
6C
E0
Cn
Sc
Data area
FD
qwert y u
FE
FE
E0
6C
Cn
Sc
Data area
FD
qewrt y u
Description
Cn
Sc
Transfers frequency data (transceive)
00
—
Transfers mode data (transceive)
01
—
Reads display frequency
03
—
Reads display mode
04
—
Sets frequency data
05
—
Sets LSB mode
06
00
Sets USB mode
01
Sets AM  mode
02
Sets CW mode
03
Sets FM mode
05
Sets WFM mode
06
Reads squelch condition (open or closed)
15
01
Reads S-meter level
02 
						

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12
CONTROL COMMAND
CT-17
Power supply
9–15VDC
RS-232C
cable
IC-R20
to [SP/CI-V]Computer
Optional
BC-25
CI-V connections example
CI-V compatible transceiver
CI-V compatible transceiver
3.5(d) mmGND
I/O
GND
I/O
3-conductor 3.5(d) mm 
plug must be used.2-conductor 3.5(d) mm plug 
						

							70
13
FREQUENCY TABLECH
Freq.
40 628.75
41 636.75
42 644.75
43 652.75
44 660.75
45 668.75
46 676.75
47 684.75
48 692.75
49 700.75
50 708.75
51 716.75
52 724.75
53 732.75
54 740.75
55 748.75
56 756.75
57 764.75
58 772.75
59 780.75
60 788.75
61 796.75
62 804.75
63 812.75
64 820.75
65 828.75
66 836.75
67 844.75
68 852.75
69 860.75
CH
Freq.
146.75
253.75
360.75
467.75
5180.75
6187.75
7194.75
8201.75
9208.75
10 215.75
11222.75
12 229.75
21 476.75
22 484.75
23 492.75
24 500.75
25 508.75
26 516.75
27 524.75
28 532.75
29 540.75
30 548.75
31 556.75
32 564.75
33 572.75
34 580.75
35 588.75
36 596.75
37 604.75
38 612.75
39 620.75
■TV channelsFollowing tables show the channels versus video
and audio frequencies depending on each
version.
D D
U.S.A. channels
(unit: MHz)
CH Freq.
259.75
365.75
471.75
581.75
687.75
7179.75
8185.75
9191.75
10 197.75
11203.75
12 209.75
13 215.75
14 475.75
15 481.75
16 487.75
17 493.75
18 499.75
19 505.75
20 511.75
21 517.75
22 523.75
23 529.75
24 535.75
25 541.75
26 547.75
CH Freq.
27 553.75
28 559.75
29 565.75
30 571.75
31 577.75
32 583.75
33 589.75
34 595.75
35 601.75
36 607.75
37 613.75
38 619.75
39 625.75
40 631.75
41 637.75
42 643.75
43 649.75
44 655.75
45 661.75
46 667.75
47 673.75
48 679.75
49 685.75
50 691.75
51 697.75
CH Freq.
52 703.75
53 709.75
54 715.75
55 721.75
56 727.75
57 733.75
58 739.75
59 745.75
60 751.75
61 757.75
62 763.75
63 769.75
64 775.75
65 781.75
66 787.75
67 793.75
68 799.75
69 805.75
D D
CCIR channels
(unit: MHz)
D D
Australia channels
(unit: MHz)
CH
Freq.
43 637.75
44 644.75
45 651.75
46 658.75
47 665.75
48 672.75
49 679.75
50 686.75
51 693.75
52 700.75
53 707.75
54 714.75
55 721.75
56 728.75
57 735.75
58 742.75
59 749.75
60 756.75
61 763.75
62 770.75
63 777.75
64 784.75
65 791.75
66 798.75
67 805.75
68 812.75
69 819.75
CH
Freq.
051.75
162.75
269.75
391.75
4100.75
5107.75
5A 143.75
6180.75
7187.75
8194.75
9201.75
10 214.75
11221.75
28 532.75
29 539.75
30 546.75
31 553.75
32 560.75
33 567.75
34 574.75
35 581.75
36 588.75
37 595.75
38 602.75
39 609.75
40 616.75
41 623.75
42 630.75
1213 
						

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13
FREQUENCY TABLE
D D
China channels
(unit: MHz)
CH Freq.
156.25
264.25
372.25
483.75
591.75
6174.75
7182.75
8190.75
9198.75
10 206.75
11214.75
12 222.75
13 477.75
14 485.75
15 493.75
16 501.75
17 509.75
18 517.75
19 525.75
20 533.75
21 541.75
22 549.75
23 557.75
24 565.75
25 613.75
26 621.75
27 629.75
28 637.75
29 645.75
30 653.75
31 661.75
CH Freq.
32 669.75
33 677.75
34 685.75
35 693.75
36 701.75
37 709.75
38 717.75
39 725.75
40 733.75
41 741.75
42 749.75
43 757.75
44 765.75
45 773.75
46 781.75
47 789.75
48 797.75
49 805.75
50 813.75
51 821.75
52 829.75
53 837.75
54 845.75
55 853.75
56 861.75
57 869.75
58 877.75
59 885.75
60 893.75
61 901.75
62 909.75
CH Freq.
63 917.75
64 925.75
65 933.75
66 941.75
67 949.75
68 957.75CH Freq.
150.75
260.75
367.75
4180.75
5187.75
6194.75
7201.75
8208.75
9215.75
10 222.75
11229.75D
D
New
Zealand
channels(unit: MHz)
CH
Freq.
52 725.25
53 733.25
54 741.25
55 749.25
56 757.25
57 765.25
58 773.25
59 781.25
60 789.25
61 797.25
62 805.25
63 813.25
64 821.25
65 829.25
66 837.25
67 845.25
68 853.25
69 861.25
CH
Freq.
21 477.25
22 485.25
23 493.25
24 501.25
25 509.25
26 517.25
27 525.25
28 533.25
29 541.25
30 549.25
31 557.25
32 565.25
33 573.25
34 581.25
35 589.25
36 597.25
37 605.25
38 613.25
39 621.25
40 629.25
41 637.25
42 645.25
43 653.25
44 661.25
45 669.25
46 677.25
47 685.25
48 693.25
49 701.25
50 709.25
51 717.25D D
UK channels
(unit: MHz)
CH
Freq.
43 653.75
44 661.75
45 669.75
46 677.75
47 685.75
48 693.75
49 701.75
50 709.75
51 717.75
52 725.75
53 733.75
54 741.75
55 749.75
56 757.75
57 765.75
58 773.75
59 781.75
60 789.75
61 797.75
62 805.75
63 813.75
64 821.75
65 829.75
66 837.75
67 845.75
68 853.75
69 861.75
CH
Freq.
249.25
354.00
457.25
5182.50
6190.50
7198.50
8206.50
9214.50
10 222.50
21 477.75
22 485.75
23 493.75
24 501.75
25 509.75
26 517.75
27 525.75
28 533.75
29 541.75
30 549.75
31 557.75
32 565.75
33 573.75
34 581.75
35 589.75
36 597.75
37 605.75
38 613.75
39 621.75
40 629.75
41 637.75
42 645.75D D
France channels
(unit: MHz) 
						

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13
FREQUENCY TABLE
D D
Indonesian channels
(unit: MHz)
CH Freq.
1A 53.75
260.75
367.75
4180.75
5187.75
6194.75
7201.75
8208.75
9215.75
10 222.75
11229.75
21 476.75
22 484.75
23 492.75
24 500.75
25 508.75
26 516.75
27 524.75
28 532.75
29 540.75
30 548.75
31 556.75
32 564.75
33 572.75
34 580.75
35 588.75
36 596.75
37 604.75
38 612.75
39 620.75
CH Freq.
40 628.75
41 636.75
42 644.75
43 652.75
44 660.75
45 668.75
46 676.75
47 684.75
48 692.75
49 700.75
50 708.75
51 716.75
52 724.75
53 732.75
54 740.75
55 748.75
56 756.75
57 764.75
58 772.75
59 780.75
60 788.75
61 796.75
62 804.75
63 812.75
64 820.75
65 828.75
66 836.75
67 844.75
68 852.75
69 860.75
D D
Italian channels
(unit: MHz)
CH Freq.
A59.25
B67.75
C87.75
D180.75
E188.75
F197.75
G206.75
H215.75
H1 222.75
H2 229.75
21 476.75
22 484.75
23 492.75
24 500.75
25 508.75
26 516.75
27 524.75
28 532.75
29 540.75
30 548.75
31 556.75
32 564.75
33 572.75
34 580.75
35 588.75
36 596.75
37 604.75
38 612.75
39 620.75
40 628.75
41 636.75
CH Freq.
42 644.75
43 652.75
44 660.75
45 668.75
46 676.75
47 684.75
48 692.75
49 700.75
50 708.75
51 716.75
52 724.75
53 732.75
54 740.75
55 748.75
56 756.75
57 764.75
58 772.75
59 780.75
60 788.75
61 796.75
62 804.75
63 812.75
64 820.75
65 828.75
66 836.75
67 844.75
68 852.75
69 860.75
D D
Taiwan channels
(unit: MHz)
CH Freq.
7179.75
8185.75
9191.75
10 197.75
11203.75
12 209.75
D D
FOT channels
(unit: MHz)
CH Freq.
4181.75
5189.75
6197.75
7205.75
8213.75
9221.75
13 
						

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FREQUENCY TABLE
■VHF marine channels
(unit: MHz)
CH Ship Ship
No. Transmit Receive
01 156.050 160.650
01A 156.050 156.050
02 156.100 160.700
03 156.150 160.750
03A 156.150 156.150
04 156.200 160.800
04A 156.200 156.200
05 156.250 160.850
05A 156.250 156.250
06 156.300 156.300
07 156.350 160.950
07A 156.350 156.350
08 156.400 156.400
09 156.450 156.450
10 156.500 156.500
11156.550 156.550
12 156.600 156.600
13 156.650 156.650
14 156.700 156.700
15 156.750 156.750
16 156.800 156.800
17 156.850 156.850
18 156.900 161.500
18A 156.900 156.900
19 156.950 161.550
19A 156.950 156.950
20 157.000 161.600
20A 157.000 157.000
21 157.050 161.650
WX CH Frequency
01 162.550
02 162.400
03 162.475
04 162.425
05 162.450
06 162.500
07 162.525
08 161.650
09 161.775
10 163.275
CH Ship Ship
No. Transmit Receive21A 157.050 157.050
21b 161.650 161.650
22 157.100 161.700
22A 157.100 157.100
23 157.150 161.750
23A 157.150 157.150
24 157.200 161.800
25 157.250 161.850
25b 161.850 161.850
26 157.300 161.900
27 157.350 161.950
28 157.400 162.000
28b 162.000 162.000
60 156.025 160.625
61 156.075 160.675
61A 156.075 156.075
62 156.125 160.725
62A 156.125 156.125
63 156.175 160.775
63A 156.175 156.175
64 156.225 160.825
64A 156.225 156.225
65 156.275 160.875
65A 156.275 156.275
66 156.325 160.925
66A 156.325 156.325
67 156.375 156.375
68 156.425 156.425
69 156.475 156.475
CH Ship Ship
No. Transmit Receive70 156.525 156.525
71 156.575 156.575
72 156.625 156.625
73 156.675 156.675
74 156.725 156.725
77 156.875 156.875
78 156.925 161.525
78A 156.925 156.925
79 156.975 161.575
79A 156.975 156.975
80 157.025 161.625
80A 157.025 157.025
81 157.075 161.675
81A 157.075 157.075
82 157.125 161.725
82A 157.125 157.125
83 157.175 161.775
83A 157.175 157.175
83b 161.775 161.775
84 157.225 161.825
84A 157.225 157.225
85 157.275 161.875
85A 157.275 157.275
86 157.325 161.925
86A 157.325 157.325
87 157.375 161.975
87A 157.375 157.375
88 157.425 162.025
88A 157.425 157.425
■Weather channels
(unit: MHz) 
						

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FREQUENCY TABLE
CH Frequency
1462.5625 MHz
2462.5875 MHz
3462.6125 MHz
4462.6375 MHz
5462.6625 MHz
6462.6875 MHz
7462.7125 MHz
■Other communications in the USA
D
D
FRS 
(Family Radio Service)
channels
Dot color Frequency
Red 151.625 MHz
Purple 151.955 MHz
Blue 154.570 MHz
Green 154.600 MHz
White 462.575 MHz
Black 462.625 MHz
Orange 462.675 MHz
Brown 464.500 MHz
Yellow 464.550 MHz
“J” Dot 467.763 MHz
“K” Dot 467.813 MHz
Silver Star 467.850 MHz
Gold Star 467.875 MHz
Red Star 467.900 MHz
Blue Star 467.925 MHz
Transceiver Transceiver
Receive transmit
462.5500 MHz467.5500 MHz
462.5625 MHz
462.5750 MHz467.5750 MHz
462.5875 MHz
462.6000 MHz467.6000 MHz
462.6125 MHz
462.6250 MHz467.6250 MHz
462.6375 MHz
462.6500 MHz467.6500 MHz
462.6625 MHz
462.6750 MHz467.6750 MHz
462.6875 MHz
462.7000 MHz467.7000 MHz
462.7125 MHz
462.7250 MHz467.7250 MHz
CH Frequency
1151.820 MHz
2151.880 MHz
3151.940 MHz
4154.570 MHz
5154.600 MHzCH Frequency
126.965 MHz
226.975 MHz
326.985 MHz
427.005 MHz
527.015 MHz
627.025 MHz
727.035 MHz
827.055 MHz
927.065 MHz
10 27.075 MHz
1127.085 MHz
12 27.105 MHz
13 27.115 MHz
14 27.125 MHz
15 27.135 MHz
16 27.155 MHz
17 27.165 MHz
18 27.175 MHz
19 27.185 MHz
20 27.205 MHz
D D
BRS 
(Business Radio
Service)channels D D
GMRS 
(General Mobile
Radio Service)
channels
D D
MURS channels D D
HF CB 
(Citizens Band)
channelsCH Frequency
21 27.215 MHz
22 27.225 MHz
23 27.255 MHz
24 27.235 MHz
25 27.245 MHz
26 27.265 MHz
27 27.275 MHz
28 27.285 MHz
29 27.295 MHz
30 27.305 MHz
31 27.315 MHz
32 27.325 MHz
33 27.335 MHz
34 27.345 MHz
35 27.355 MHz
36 27.365 MHz
37 27.375 MHz
38 27.385 MHz
39 27.395 MHz
40 27.405 MHz
CH Frequency
8467.5625 MHz
9467.5875 MHz
10 467.6125 MHz
11467.6375 MHz
12 467.6625 MHz
13 467.6875 MHz
14 467.7125 MHz
13 
						

							75
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FREQUENCY TABLE
Frequency Description121.500 Emergencies
122.000 Flight Advisory Service
122.200  Flight Service Stations
122.700  Unicom— Uncontrolled airports
122.725  Unicom— Private airports
122.750 Unicom— Air-to-air communications
122.800  Unicom— Uncontrolled airports
122.900  Search & rescue training, & uncontrolled airports
122.950  Unicom— Controlled airports
123.000  Unicom— Uncontrolled airports
123.025 Helicopters— Air-to-air communications
123.050 Unicom— Heliports
123.075 Unicom— Heliports
123.100  Search & Rescue
123.300 Flight Schools
123.450  Air-to-air communications (unofficial)
123.500 Flight Schools
123.600  Flight Service Stations— Uncontrolled airports
148.125  Civil Air Patrol Repeaters— Secondary
148.150  Civil Air Patrol Repeaters— Primary
156.300 Aircraft-to-ship— safety
156.400 Aircraft-to-ship— commercial
156.425 Aircraft-to-ship— non-commercial
156.450 Aircraft-to-ship— commercial
156.625 Aircraft-to-ship— non-commercial
156.900 Aircraft-to-ship— commercial
243.000  Military Emergency “Guard”
255.400 Flight Advisory Service
257.800 Civilian Towers
311.000 SAC Primary
321.000 SAC Secondary
381.800 USCG— PrimaryD D
General aviation frequencies
CH
Frequency
Remarks
range
2– 13 54–216 (same as broadcast VHF)
14– 22 120–174 Mid band Ch. A–I
23– 36 216–300 Super band J–W
37– 53 300–402
Hyper band AA–QQ
54– 64 402–468
65– 94 468–648 (Ultra band)
95– 99 90–120 Low band A5–A1
100–125 648–804 (Ultra band)
D D
Cable TV (IRC)
(unit: MHz)
169.445 MHz
169.505 MHz
170.245 MHz
170.305 MHz
171.045 MHz
171.105 MHz
171.845 MHz
171.905 MHz*Power limited to 1/20 watt. These frequencies are also used at drive-in win-
dows at some fast-food restaurants.
D D
Wireless Microphones 
						

							76
13
FREQUENCY TABLE
■Other communications— other countries
CH Frequency
1446.00625
2446.01875
3446.03125
4446.04375
5446.05625
6446.06875
7446.08125
8446.09375D
D
PMR446 channels
(unit: MHz)
CH Frequency
59 434.525
60 434.550
61 434.575
62 434.600
63 434.625
64 434.650
65 434.675
66 434.700
67 434.725
68 434.750
69 434.775
CH Frequency
1433.075
2433.100
3433.125
4433.150
5433.175
6433.200
7433.225
8433.250
9433.275
10 433.300
11433.325
12 433.350
13 433.375
14 433.400
15 433.425
16 433.450
17 433.475
18 433.500
19 433.525
20 433.550
21 433.575
22 433.600
23 433.625
24 433.650
25 433.675
26 433.700
27 433.725
28 433.750
29 433.775D D
LPD
(Low Power Device)
channels
(unit: MHz)
CH Frequency
30 433.800
31 433.825
32 433.850
33 433.875
34 433.900
35 433.925
36 433.950
37 433.975
38 434.000
39 434.025
40 434.050
41 434.075
42 434.100
43 434.125
44 434.150
45 434.175
46 434.200
47 434.225
48 434.250
49 434.275
50 434.300
51 434.325
52 434.350
53 434.375
54 434.400
55 434.425
56 434.450
57 434.475
58 434.500
13 
						

							77
13
FREQUENCY TABLE
CH Frequency
1476.425 MHz
2476.450 MHz
3476.475 MHz
4476.500 MHz
5476.525 MHz
6476.550 MHz
7476.575 MHz
8476.600 MHz
9476.625 MHz
10 476.650 MHz
11476.675 MHz
12 476.700 MHz
13 476.725 MHz
14 476.750 MHz
15 476.775 MHz
16 476.800 MHz
17 476.825 MHz
18 476.850 MHz
19 476.875 MHz
20 476.900 MHzD D
UHF C.R.S 
(Citizen Radio Service) 
channels
CH Frequency
21 476.925 MHz
22 476.950 MHz
23 476.975 MHz
24 477.000 MHz
25 477.025 MHz
26 477.050 MHz
27 477.075 MHz
28 477.100 MHz
29 477.125 MHz
30 477.150 MHz
31 477.175 MHz
32 477.200 MHz
33 477.225 MHz
34 477.250 MHz
35 477.275 MHz
36 477.300 MHz
37 477.325 MHz
38 477.350 MHz
39 477.375 MHz
40 477.400 MHz