Icom Communication Interface - V Reference manual

leom Inc.

"2~:d-

f\ \--. 1. ' ,

~- I I

FOREWORD

We have introduced the CI-V (Icom Communication Interface-V) System, an advanced remote control LAN (Local Area Network). With this system, you can control Ieom's recent HF transceivers, all mode transceivers and nearly all receivers remotely. A variety of functions including the operating frequency, mode and memory channel can be changed via your personal computer.

INTRODUCTION

This reference manual explains the basic theory of the CI-V System, general operating method, and all current functions. Available functions differ according to radios. (Section
Before operation, condition setting MUST be performed for both your personal computer and each radio. (Sections 2-1-2-11) Parameter setting methods differ according to computers and programming languages. Refer to the instruction manual of your computer and programming language. (Section 2-7)

EXPLICIT DEFINITIONS

The following explicit definitions apply to this reference manual. Word Definition Personal injury, fire hazard or electric shock may occur. Equipment damage may occur. If ignored, inconvenience only. No personal injury or risk of electric shock.

APPLICABLE RADIOS

.& WARNING

CAUTION

transceivers All mode transceivers Receivers
IC-725, IC-726, IC-72S, IC-729, IC-735, IC-737, IC-751, IC-751 A, IC-761, IC-765, IC-7S1 IC-271A/E/H,IC-471AiEiH,IC1271AiE, IC-575A/H, IC-275A/EfH, IC375A, IC-475A/E/H, IC-1275AiE, IC-970A,'E/H IC-R71A/E/D, IC-R72, IC-R7000. IC-R7100. IC-R9000

PRECAUTIONS

.& NEVER connect the CT-17 CI-V LEVEL CONVERTER to an AC outlet. This will ruin any connected equipment and electric shock may occur. DISCONNECT all AC and DC power cables from the radios before performing any connections or internal work. DO NOT apply more than 15 V DC to the CT-17. Check power source voltage before connecting the DC power cable. If a non-Icom CI-V level converter is used, accurate operation is not guaranteed. The use of Icom's CT-17 is recommended. Icom has strived to make all information as precise as possible. However, NO liability is accepted with respect to the use of the information herein. To include the newest information, all stated contents are subject to change without notice or obligation.

SOFTWARE

Commercially-made software from other companies may be available for the CI-V System. Freeware or shareware may be available from BSS's or RBBS's. Ask your Icom Dealer for details. Icom does not yet supply any software for the CIN System. However, the later pages of the CT-17 instruction manual include sample programs. All programs MUST be modified to suit your computer,

COPYRIGHT

All rights for the CI-V System and this reference manual are reserved by Icom Inc. Production or publication of the content in any manner, without express permission of Icom Inc, is prohibited.

TABLE OF CONTENTS

FOREWORD. . . . EXPLICIT DEFINITIONS. PRECAUTI.ONS. . . INTRODUCTION. APPLICABLE RADIOS . . . . PROGRAMS. . . . . COPyRIGHT. . . . 1 TABLE OF CONTENTS. .. . . ii 1. WHAT IS THE CI-V SYSTEM?
1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 1-9 1-10
5. MESSAGE FORMAT. pgs. 5-1-5-4
5-1 5-2 5-3 5-4 5-5 5-6 Basic message format Frequency data format Memory blank code'" Jammer code Preamble code" End of message code p. p. p. p. p. p. 5-1 5-3 5-3 5-3 5-4 5-4

6. SPECIAL CHANNEL NUMBER AND MODE DATA. .. pgs. 6-1-6-2

pgs. 1-1-1-2

6-1 What are special memory channel p. numbers? Scan edge channels for the IC-R9000 p. Scan edge channels for the IC-R71 00. p. Other special memory p. channel numbers Special memory channel access example.. p. Mode and IF passband width tables'" p. 6-1 6-1 6-1 62
Advanced remote control. . p. 1-1 Features p. 1-1 History of the CIY System p. 1-1 Required equipment p. 1-2 p. 1-2 How to prevent RFI CSMNCD System p. 1-2 Transceivers and receivers. p. 1-2 Data transmission system p.' 1-2 Decimal and hexadecimal values p. 1-2 BCD code p. 1-2

6-2 6-3 6-4 6-5 6-6

2. PRE-SETTINGS
2-2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 2-11

pgs. 2-1-2-3

21 2-1 2-2-2 2-2-2 2-3 2-3 2-3
7. COMMAND DESCRIPTION. pgs. 7-17-24
Pre-setting outline p. Changing CI-IY to C1-Y. p. Baud rate for radios. p. Baud rate modification p. Address numbers for each radio p. Address number modification. p. Personal computer conditions p. Address number for the controller. p. What is the transceive function? p. Transceive function ON/OFF p. Operating frequency data length. p.
7-1 7-2 7-3 7-4 7-5 7-6 7-7 7-8 7-9 7-10 7-11 7-12 7-13 7-14 7-15 7-16

3. CONNECTIONS

3-1 3-3-4

p. 3-1

3-1 3-3-1
Connection outline p. RS-232C cable connection . p. Mini-plug cable connection. . p. DC power supply connection p.
Transceive commands p. 7-1 Upper/lower-edge frequency readout command. . p. 7-3 Operating frequency, mode readout commands. p. 7-4 Operating frequency, mode writing commands p. 7-5 YFO selection command. p. 7-6 Front window selection command p. 7-7 Memory channel commands. p. 7-8 Offset frequency commands p. 7-11 Scan start/stop command p. 7-12 Scan condition command . p. 7-13 Sub commands for command OEH. p. 7-14 p. 715 Basic window scan command Advanced window scan start/stop command p. 716 Split and duplex command p. 7-18 p. 719 Tuning step command Other commands. . p. 7-20

4. COMMAND TABLES

pgs. 4-1-4-3

WHAT JS THE CI-V SYSTEM?

1-1 Advanced remote control
The CI-V System enables you to control radio functions while your radio is not at hand. Instead of the radio's front panel, you can use a personal computer. Most recent Icom radios have a CPU, also known as a microprocessor. Each CPU is programmed to communicate with an external remote controller or CPUs in other radios. In the CI-V System, the remote controller means a personal computer connected via an optional CT-17 CI-V LEVEL CONVERTER. You can utilize the state-of-the-art CI-V System to change operating frequency or mode, to activate a scan function, and more while you are away from your radio. What a convenient system! After you have typed in a computer command, the computer converts the command to signals which another radio's CPU accepts. Signals conform to a pattern for communication between computer and radio. The following sections describe how to control your radio with your computer.

1-2 Featu res

The CI-V System allows easy computer control of a variety of radios. Listed below are only some of its sophisticated features. Remote control for up to 4 radios. (Section 3-1) Operating frequency selection. (Section 7-4) Operating mode selection. (Section 7-4) Memory channel selection. (Section 7-7) Memory writing. (Section 7-7) Scan control. (Sections 7-9-7-13) Automatic operating frequency and mode data transfer between radios. (Sections 2-9, 7-1) Serial data communication based on the CSMNCD (Carrier Sense Multiple Access with Collision Detection) System. (Section 1-6)
1-3 History of the CI-V System
The CI-V System is Icom's 5th communication interface product. Either the CI-IV or CI-V System have been installed in recent HF, all mode and almost all receivers. (Section 2-2)

Controller 1

Controller 2

IC-R7000

IC-73S

IC-R72

Fig. 1-1

WHAT IS THE CI-V SYSTEM?

1-4 Required equipment
To control CI-V radios, a personal computer equipped with an EIA standard RS-232C 110 port is required. Icom offers the following options for the CI-V System.
1-8 Data transmission system
The CT-17 and each radio exchange serial information using NRZ (Non Return to Zero) format. Fig. 1-2 below shows an example of 1-byte data composition.
CT-17 CI-V LEVEL CONVERTER
Using the CT-17. CI-V radios can be externally controlled with a personal computer. Up to 4 CI-V radios can be connected to the CT-17. (Section 3-1)

UX-14 CI-IV/CI-V CONVERTER
Required only for radios equipped with the CI-IV System. The UX-14 allows a CI-IV radio to utilize the CI-V System. (Section 2-2)
1 byte is 8 bits. 1 block is 10 bits.

Fig. 1-2

1-5 How to prevent RFI
Computer equipment that is set near a radio may cause RFI (Radio Frequency Interference). Following are a few ways to prevent RFI: Keep well matched antennas away from the computer. Keep coaxial cables away from the computer. Use an AC line filter for a computer AC power cable. Use the shortest and heaviest possible gauge wire or strap for computer grounding.
1-9 Decimal and hexadecimal values
In this manual. a value is usually base 16, a hexadecimal value.
Hexadecimal value Decimal value OH 0 lH 1 2H 2 3H 3 4H 4 5H 5 6H 17H 6

Hexadecimal value

1-6 CSMA/CD System
The CSMNCD (Carrier Sense Multiple Access with Collision Detection) System is a way to manage the CI-V System. The system keeps the CI-V bus line as free as possible of useless messages and raises bus line efficiency to over 90%. During data transmission. the radio which is transmitting a message monitors the CI-V bus line simultaneously. If message collisions are detected. the radio halts the message transmission. After waiting for a programmed period of time, the radio sends the previous message again. (Section 5-4)

Decimal value

Table 1-1

1-10 BCD code

For frequency data, the memory channel number and every other data MUST be specified in BCD (Binary Coded Decimal) code. Refer to Table 1-3 below. [Example] To select memory channel 15, channel number data as 15H.
Decimal value Binary code 10000111

specify memory

Corresponding BCD code
1-7 Transceivers and receivers
In this manual. the word "radio" refer to both transceivers and receivers.
I Hexadecimal code 09H I 10H I 15H I 26H I 87H I

Table 1-2

PRE-SETTINGS

2-1 Pre-setting outline

WARNING: DISCONNECT the AC and DC power cables from the radios before performing any internal work. Following is the pre-setting outline for the CI-V radios, CT-17 and your personal computer. Refer to Section 2-2-2-11 for condition setting. Refer to Section 3-1-3-4 for connection. 1) Set the baud rate, address and transceive function condition for all radios. -For some radios, these settings can be performed after power is turned ON. 2) Connect the [REMOTE] jack on each radio to the CT-17. 3) Connect the computer to the CT-17 using a suitable RS-232C straight cable. 4) Connect a 9-15 V DC power source to the CT-17. 5) Turn ON your radios and personal computer. 6) Set the personal computer conditions.

2-2 Changing CI-IV to CI-V
To control a CI-IV radio remotely with the CI-V System, an optional UX-14 CI-IV/CJ-V CONVERTER MUST be installed. Refer to Table 2-1 below.

2-3 Baud rate for radios

For a CI-V radio
The Icom standard baud rate of 1200 bps is specified before shipping.

For a CI-IV radio

Specify a radio baud rate. instruction manual. Refer to the UX14
2-4 Baud rate modification
If required, modify the radio baud rate. Selectable baud rates and setting methods differ according to radios. Refer to the instruction manual of each radio or UX-14. NOTE: Each radio's baud rate MUST be equal to the computer's baud rate. (Section 2-7)
CI-IV System HF transceivers IC-751,IC-751A
CI-V System IC-725,IC-726, IC-72S,IC-729, IC-735, IC-737, IC-76l, IC-765 IC-R72, IC-R7000, IC-R7l00, IC-R9000
Receivers 28/50 MHz transceivers 144 MHz transceivers 220 MHz transceiver 430 MHz transceivers 1200 MHz transceivers Multi band transceiver

IC-R71NE/D

IC575NH IC-275NE/H

IC-271NE/H

-IC-471NE/H IC-1271NE
IC-375A IC-475NE/H IC-1275NE

-Table 2-1

IC970NE/H
2-5 Address number for each radio
To distinguish equipment, each radio has its own address in hexadecimal code.
2-7 Personal computer conditions
Specify RS-232C port conditions (protocol) on your computer as follows: Baud rate specified Data bit length Parity check Start bit length Stop bit length 8 bits No parity 1 bit 1 bit Full duplex Non effective Non effective Table 2-bps
An Icom standard address number was before shipping. Refer to Table 2-2 below.
Specify an Icom standard address number. Refer to the UX-14 instruction manual and Table 2-2 below.
2-6 Address number modification
If required. up to 4 radios of the same model can be connected to the CT-17. However, a different address number MUST be specified for each radio. Address numbers 01 H-7FH are allocated, but the selectable range varies according to radios. Setting methods differ according to radios. Refer to the instruction manual of each radio or the UX-14.
System X parameter S parameter
NOTE: The Icom standard baud rate of 1200 bps is specified for each radio (Section 2-4) before shipping.

NOTE: DO NOT

specify address number OOH,
EOH or FOH.-FFH for a radio address. These address numbers are already reserved for the controller and other functions.

2-8 Address number for the controller
Specify the controller's address in hexadecimal code. The Icom standard address number for the controller is EOH.
Radio IC-73S JC-R7000 IC-275A/E/H IC-375A IC-475A/E/H IC-575A/H IC-1275A/E
Address 04H 08H 10H 12H 14H 16H 18H
Radio IC-R71 AlE/D IC-7S1A IC-761 JC-271 A/E/H IC-471 A/E/H IC-1271 AlE IC-781
Address 1AH 1CH 1EH 20H 22H 24H 26H
Radio IC-72S JC-R9000 IC-765 IC-970A/E/H IC-726 JC-R72 IC-R7100
Address 28H 2AH 2CH 2EH 30H 32H 34H

Address

-IC-72S JC-729 JC-737
36H 38H 3AH 3CH 3EH 40H EOH

--Controller

Table 2-2
: Not yet assigned for any radio at the time of printing.
2-9 What is the transceive function?
When the transceive function is ON, any change in the operating frequency or mode on a radio is automatically transferred to other radios.
[Example] In Fig. 2-1 below, when the operating frequency of the IC-735 is changed, the IC-R72 follows the IC-735. This is because the operating frequency range of the IC-735 corresponds to that of the IC-R72.
CI-V bus line (Serial data bus line)

0000000

O~ ~"f>MB:t 01~ ==

Fig. 2-1

2-10 Transceive function ON/OFF
The transceive function can be set as ON (effective), or OFF (non-effective), for each radio. Setting methods differ according to radios. Refer to the instruction manual of each radio or the UX-14. Transceive function ON (effective) was specified before shipping.
2-11 Operating frequency data length
Radios IC-73S Other HF transceivers, IC-R71 AlE/D, IC-R72, ICR7100, IC-R9000 Other radios Operating frequency data length 4 bytes (fixed) S bytes " or 4 bytes

5 bytes (fixed)

Table 2-5
'1: For these radios, the frequency data length was specified at S bytes before shipping. '2: Specify the frequency data iength at 4 bytes only for operating the transceive function with the IC-73S. Setting methods differ according to radios. Refer to the instruction manual of each radio or the UX-14.

CONNECTIONS

3-1 Connection outline
After performing internal settings for each radio, connect each radio, the CT-17 and your computer.
CAUTION: DISCONNECT the AC or DC power cable from each radio, the computer and the DC power supply for the CT-17 before connection.

'-"Vt(~ ~

~F~=-<::~::F-'

AC outlet

Personal computer

,-------"J]

Fig. 3-1
3-2 RS-232C cable connection
According to the RS-232C socket on your computer, connect a suitable RS-232C cable.
3-3 Mini-plug cable connection
Connect the [REMOTE] jack on the radio to either the [CI-V REMOTE] jacks on the CT-17 using the supplied OPC-017A MINI-PLUG CABLE. The CT-17 accepts up to 4 radios. To connect 3 or 4 radios, additional OPC-01?A MUST be purchased.

Transmit address

Specify the controller's address, EOH. (Section 2-8)
The radio automatically specifies its address in hexadecimal code.

Command number

Specify a command number in hexadecimal code. (Section 4)
The radio automatically specifies the received command number in hexadecimal code.

Sub command number

For some commands, a sub command number MUST be (Section 4) specified in hexadecimal code.
The radio automatically specifies the received sub command nUr.1ber in hexadecimal code.

Data area

The radio sends back requested data for the following commands in BCD code. 1-10) Command 02H (Section 7-2) Command 03H (Section 7-3) Command 04H (Section 7-3) Command OCH (Section 7-8) Command 15H (Section 7-16) (Section commands, additional data MUST
For some be specified in BCD code. (Section 1-10) For some commands, a data area is not to be added.

End of message code

Specify FDH at the end of the message.
The radio automatically specifies FDH at the end of the message.

(2) OK message

The OK message means that the radio has received a correct command message from the controller and has performed the specified operation.

(3) NG message

The NG message means that the radio has received a message, but it could not perform the specified operation.

-+ Sent left to right.

The radio automatically specifies its address in hex"adecimal code.

OK code

The radio automatically specifies the OK code, FBH.

NG code

The radio automatically specifies the NG code, FAH.

End of mess?ge code

Under the following condition, the radio does not transmit the OK message even when the correct command message has been received: Command OOH or 01 H has been received. (Sections 2-9, 7-1) When the radio has transmitted requested data.
Under the following conditions, the radio transmits the NG message: Command OOH or 01 H has been received. (Sections 2-9, 7-1) Undefined command or sub command is received. Specified frequency range or mode does not correspond to the radio's operating frequency range or mode. The radio is not equipped with the specified function. The radio is not equipped with the specified memory channel. A blank channel has been specified for command message OAH. (Section 7-7)
5-2 Frequency data format
For command OOH, 02H or 05H, specify frequency data according to the following format. For command 02H or 03H, each transceiver transmits according to the same format. The operating frequency data length is 5 bytes* and each byte is specified in BCD code. (Section 1-10) 'For the IC-735, 4 bytes.

5-3 Memory blank code

A memory channel without contents is called a blank channel. When a blank channel is specified via the controller with command 03H, 04H or OCH, the radio transmits the blank code, FFH.

Radio. controller

Frequency data length
IC-735 only 4 bytes. Specify the 10 MHz1 Hz digits. 5 bytes. Specify the 1 GHz1 Hz digits. Other radios Only for transceive operation with the IC-735, select 4 bytes, and specify the 10 MHz-1 Hz digits. Table 5-1 Some radios may not display the 10Hz and 1 Hz digits. Each radio ignores the frequency data below the minimum tuning step. [Example] When the operating frequency is 145.123450 MHz, the 1st byte, 50H refers to the 10Hz and 1 Hz digits. The 2nd byte, 34H refers to the 1 kHz and 100 Hz digits. For the IC-735, the 5th byte CANNOT be specified. Sent left to right. The IC-761 or other radios equipped with the CI-IV System transmit previous memory contents, even though the memory channel is a blank channel. This is because blank channels have previous contents.

5-4 Jammer code

The jammer code, FCH, prevents a message collision among radios and the controller. (Section 1-6)
Message transmitting radio
During message transmission, a radio which is transmitting receives a transmitted message from itself to detect a message collision. If a message collision with another radio is detected, the radio halts message transmission, and checks that no other messages are transmitted on the CI-V bus line. When no other message is transmitted, the radio transmits the jammer code, FCH, 5 times as below.

Fig. 5-1

100 MHz digit 1 GHz digit 1 MHz digit 10 MHz digit 10kHz digit 100 kHz digit 100 Hz digit 1 kHz digit 1 Hz digit 10Hz digit
After jammer code transmission, the radio checks that no other message is being transmitted on the CI-V bus line, and transmits the previous message again.

Message receiving radio

When the jammer code, FCH, is received during command message receiving, the radio cancels the current command message and waits for the next command message.

5-5 Preamble code

From the controller, FEH M U 5T be transmitted 2 times at the beginning of the message for data synchronization. Each radio automatically transmits FEH 2 times at the beginning of the message for data synchronization.

5-6 End of message code

From the controller, FDH M U 5T be transmitted at the end of the message. Each radio automatically transmits FDH at the end of message.
SPECIAL CHANNEL AND MODE DATA
6-1 What are special memory channel numbers?
Some radios have special memory channel numbers to specify a call channel, scan edge channels etc. By specifying a special memory channel number, a call channel or scan edge channel can be specified in the same way as ordinary memory channels. (Section 7-7)

IC-72S, IC-726, IC-737, IC-761,IC-76S,IC-781, IC-S7SAlH, IC-R72 IC-275A1E/H, IC-37SA, IC-475A1E/H, IC-1275A1E, IC-970AlE/H* 0100 0101
6-4 Other special memory channel numbers
Scan edge P1 Call channel
6-2 Scan edge channels for the IC-R9000
OP1 Group 0 OP2 1P1 Group 1 1P2 2P1 Group 2 2P2 3P1 Group 3 3P2 4P1 Group 4 4PGroup 9 9PGroup 8 8P2 9P1004 Group 7 7P2 8P1002 Group 6 6P2 7PGroup S 5P2 6P1012 5P1 1010

Table 6-3

'For the IC-970A/E/H. the call channel and scan edge channels
P 1 and P2 in the selected band are accessible.
Scan edge 25 IC-728, JC-729 0025

Call channel

Table 6-4
6-5 Special memory channel access example
For the IC-R9000, to recall scan edge channel 9P2, send command OBH in the data format below.

Table 6-1

6-3 Scan edge channels for the IC-R7100
OPl Group 0 OP2 1P1 Group 1 1P2 2P1 Group 2 2P2 3P1 Group 3 3P2 4Pl Group 4 4PGroup 9 9PGroup 8 8P2 9P0904 Group 7 7P2 8P0902 Group 6 6P2 7PGroup S 5P2 6P0912 5P1 0910

~191FDI

Specify the IC-R9000's

acc~ess,

Specify the controller's address. EOH.
Specify a command number, OSH, for channel recall. (Section 7-7)

memo~y

Special memory channel number
Specify special memory channel number 1019 in BCD code to recall scan edge channel 9P2 in the IC-R9000. (Section 1-10)

Table 6-2

- SPECIAL CHANNEL AND MODE DATA
6-6 Mode and IF passband width tables
LSB USB AM CW RTIV (FSK) FM Wide FM SSB*

'For the ICR7000 only.

Mode data Table 6-5
For the IC-781. IC-R9000 and IC-R7000. IF passband width is selectable via the CIV System. Other radios are not equipped with this capability.
Mode LSB Mode data 00 Wide 01 IF passband width data Medium Narrow 02

IC-7a1

. USB 01.. __ AM 02. _CW

USB AM

IC-R9000
:::::::::~:Y:!::::::::: :::::?~::::: ::: :::::::::::::?:1::::::::::::::::: ::: ::::::::::::?~::::: ::::::::::: ::::::::::.:::. :o~:::::::::::. ::: 1
:::::~i;~Yl;~~::::: :::::~:::::: :::::::::::::::j(::::::::::::::l::::::::::::::X::::::::::::::::: ::::::::::.::::J(:::::::::::::

SSB AM

0500 02

Fixed Fixed

.FM. 05 0;"[=102

Table 6-6

, IF passband width is fixed even though the ICR9000 accepts IF passband width data for wideFM mode.

COMMAND DESCRIPTION

7-1 Transceive commands

Com mand

Transfers operating frequency data. No response from any radio.

Radio. radio

This command is used to transfer operating frequency data automatically among several radios. (Section 2-9) When the operating frequency is changed on a radio, the radio automatically transfers the operating frequency data to other radios. No manual operation is required.

Controller'" radio

This command also can be used to transfer operating frequency data from the controller to several radios simultaneously or only to a specified radio.
When the operating frequency is changed on a radio, the radio automatically selects the receive address, OOH.
Specify the receive address as below:
for radios with the transceive function
is ON. (Section 2-10) A radio address only for a specified radio. (Section 2-5)
The radio automatically specifies its address.
Transmit address Command number
The radio automatically specifies the command number; OOH. Specify the controller's address. cOHo
Specify the command number, OOH.

Operating frequency data

The radio automatically transmits its operating frequency data in BCD code. (Section 1-10) [Example] When operating frequency data is
Specify operating frequency data i.-: BCD ccde as in the example at left.

(Sectic~,s

1-1 0, 5-2)

145.123450 MHz.

below:
Each radio that is connected en the same

frec;~e~,cy

If the transceive function is OFF, the radio does not transfer or receive the operating frequency data from other radios. (Section 2-10) Each radio that is connected on the same CI-V bus line receives the operating frequency data. As long as the received frequency data is within its operating frequency range, each radio accepts the data and changes the displayed operating frequency. Unlike command 05H, no radio transmits an OK or NG code even when this command is received.
CI-V bus line receives the operating

cat::. as

When the receive address OOH is specified, radlcs with the transceive function ON receive specified radio receives the data. If the transceive function is OFF, the racio does not receive command OOH with the receive acdress OOH. and receives only a command with the radio's address. Unlike command 05H, no radio transmits an OK or NG code even when this command is received.

7-2 Upper/lower-edge frequency readout command
Reads out upper/lower-edge frequency data.

Controller. radio

Radio" controller
Specify a radio's address. (Section 2-5)
Specify the controller's address, EOH.
Specify the command number, 02H.
The radio automatically specifies the received command number, 02H.
Lower-edge frequency data
The radio sends back lower-edge frequency data in BCD code. (Sections 1-10, 5-2)

Separator code

To punctuate the space between the loweredge and higher-edge frequency data, the radio sends back a separator, 2DH.
Higher-edge frequency data
The radio sends back higher-edge frequency data in BCD code. (Sections 1-10, 5-2) [Example] 144.000000 When MHz the and lower-edge higher-edge frequency frequency is is

146.000000 MHz.

Depending on the radio's condition, the arrangement of lower and higher-edge frequency data may be reversed. If the radio is equipped with scan edge channels P1
and P2, the radio transmits these channel contents. If the radio is not equipped with scan edge channels, the radio transmits its highest and lowest band edge frequencies.
7-3 Operating frequency, mode readout commands
Reads out operating frequency data.

Controller

Radio

controller

The radio automatically specifies ler's address, EOH. the control-
Specify the command number, 03H.
The radio automatically specifies the received command number, 03H.
If a blank channel is selected, the radio sends
the memory blank code, FFH, except for the
IC-761 and CI-IV radios. (Section 5-3)
The radio sends back operating frequency data in BCD code. (Sections 1-10, 5-2)
Reads out the operating mode and IF passband width data.
The radio automatically specifies the co:-,troller's address, EOH.
Specify the command number, 04H.
The radio automatically specifies the received command number, 04H.
The radio sends back operating mode data.
The radio may send back IF passband width data. (Section 6-6)
7-4 Operating frequency, mode writing commands
Writes operating frequency data into a displayed VFO or memory channel.
When the correct command is received, the radio operates as follows. Selects the specified operating Sends back the OK code, FBH. frequency for the displayed VFO or memory channel.
Specify the command number, 05H.
Specify operating code. (Section 1-10) [Example] When the specified operating frequency frequency data in BCD
If the specified frequency range does not radio sends back the NG code, correspond to the radio's operating frequency range, the FAH.

data is 145.123450 MHz.

Writes operating mode data into a displayed VFO or memory channel.
When the correct command is received, the radio operates as follows. Selects the specified operating mode for the displayed VFO or memory channel. Sends back the OK code, FBH.
Specify the command number, 06H.
Specify operating mode data in BCD code. (Section 6-6)
Under the following conditions, the radio sends back the NG code, FAH. The transceiver is not equipped specified mode. The radio is not equipped with IF passband width selection capability with the CI-V System. with the
If the radio is equipped with IF passband width selection capability with the CI-V System, the information can be specified. (Section 6-6)
7-5 VFO selection command
I Sub commands aaH-D1 H ISelects VFO mode. Selects VFO A or VFO B.

Radio -+ controller

IFE I FE I ra IEO I a71 sc I FD I
IFE IFE IEO I ra I FB or FA I FD I
When the correct command is received, the radio operates as follows. Selects the specified operation described at left below. Sends back the OK code, FBH.
Specify the command number, 07H.
Specify the sub command number.
Under the following conditions, the radio sends back the NG code, FAH. The radio is not equipped with the specified function. The radio is not equipped with a VFO.

Operation

When no sub command is added, the radio changes from MEMORY mode to the previously used VFO. Changes from MEMORY mode to VFO A. or
from VFO B to VFO A. Changes from MEMORY mode to VFO B, or from VFO A to VFO B. Copies displayed VFO contents to another VFO. [VFO A = VFO B] Exchanges VFO A contents with VFO B
contents. [VFO A. ~ VFO B] For the le-970A/E/H, exchanges MAIN band and SUB band.

[MAIN"'~

Turns the dual watch function OFF. Turns the dual watch function ON. Accesses MAIN band. Accesses SUB band.
7-6 Front window selection command

Sub command EOH

Selects the front window. [WINDOW]
When the correct command is received, the radio operates as follows. Selects the specified window as the front window. Sends back the OK code, FBH.
Specify the sub command number, EOH.
When the radio is not equipped with the window scan function, the radio sends back NG code, FAH.

Window number

Specify a window number to select for the front window in BCD code. Either 00 or 01 can be specified.

NOTE: Window number 00 or 01 is used in the
IC-R7100, even though the radio does not indicate it on the function

dis~lay.

There is no command to readout which window is the front window.
7-7 Memory channel commands
I Selects MEMORY mode or specifies a memory channel number. [MR]
I FE I FE I ra I EO I 08 1
I FE I FE I EO I ra I FB or FA IFD IFB I Whencodecorrect command is received, OK the
radio operates as follows. memory channel. Sends back the OK code, FBH.
Selects the previously used or specified
Specify the command number, 08H.

Memory channel number

Specify the memory channel number in BCD code.
If the radio is not equipped with the specified memory channel, the radio sends back the NG code, FAH.
When no memory channel viously used memory channel. number is
specified, the radio selects the pre-

00-99 01009999

I Selects sP~cified memory channel 0-99.

Selects channel

6-1-6-5)

specified can

memory

channel (Sections

100-9999. A call channel or scan edge

be specified.

[Example) Selects memory channel 15.
[Example) Selects memory channel 102.
Writes displayed contents into a selected memory channel. [MW]
When the correct command is received, the radio operates as follows. Writes displayed contents including the operating frequency, mode, etc. into the previously selected memory channel. Sends back the OK code, FBH.
Specify the command number, 09H.
If the radio is not equipped with any memory channel, the radio sends back the NG code, FAH.
Copies selected memory channel contents into a VFO. [M. VFOj
When the correct command is received, the radio operates as follows. Copies displayed memory channel contents including the operating frequency, mode, etc. into the previously used VFO. Sends back the OK code. FBH.
Specify the command number, OAH.
If a blank channel is selected, the radio sends back the NG code, FAH.
The displayed memory channels
contenst are not affected.
Clears selected memory channel contents. [M CLEAR]
When the correct command is received, the radio operates as follows. Writes the memory blank code, FFH, into the selected memory channel. Sends back the OK code, FSH.
Specify the command number, OSH.
The IC-761 or a radio that is equipped with are not
the CI-IV System preserves previous memory contents even though contents of blank channels displayed.

7 - 10

7-8 Offset frequency commands
Reads out offset frequency contents in a displayed VFO or memory channel.

Offset frequency data

When the correct command is received, the radio sends back offset frequency data in BCD code. [Example] When offset frequency is 20 MHz.