INTRODUCTION. This service manual describes the latest service information for the ICH DUAL BAND FM TRANSCEIVER at the time of publication. View and Download ICOM ICH instruction manual online. DUAL BAND FM TRANSCEIVER. ICH Transceiver pdf manual download. View and Download Icom ICH operating manual online. VHF/UHF Radio. ICH Radio pdf manual download.
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Operation is sub- ject to the 22720h two conditions: I Selecting output power D Location Select a location which can support the weight of the trans- ceiver and does not interfere with driving. We recommend the locations shown in the diagram below. NEVER place the transceiver or mamual controller where nor- mal operation of the vehicle may be hindered or where it could cause bodily injury.
Ferrite core D Microphone connection Two microphone connectors are maual for the ICH— one is on the controller side panel, and another is on the main unit front panel. Connect the supplied microphone to either the desired con- nector as illustrated below.
NEVER remove the fuse holders. A non- radial antenna should be used when using a magnetic mount. Roof-mount antenna Drill a hole or use a magnetic mount.
Gutter-mount antenna To antenna Selecting the operating frequency band The ICH has 2 m and 70 cm bands for each left and right band.
I Repeater operation 1. Any memory channel can iccom recalled from either left or right band. Using the HM q In VFO mode, set the desired operating frequency, includ- ing offset direction, tone settings, etc.
ICOM IC-2720H Instruction Manual
V Connects the controller unit with the supplied cable. Outputs both left and right bands audio when no external speaker is connected to [SP-2]. See the table below for details. Starts and stops scanning.
Starts and stops priority watch. Selects high output power. Selects low output power Selects minus duplex operation. Selects plus duplex operation. To activate all functions access or to change frequency via the microphone, you must designate one band as the main band.
Independent tuning step for the left and right, as well as each frequency bands can be set for individual tuning convenience.
The following tuning steps are available. The transceiver has 2 different lock functions. D Frequency lock This function locks manyal and switches electronically and can be used together with the microphone lock function.
I Receiving q Set the audio level for the main band. The squelch attenuator allows you to set a minimum signal level icmo to open the squelch. The attenuator function can be deactivated in initial set mode. While operating on the main band, a beep sounds to inform you that a signal was received on the sub band.
This may distort the signal. The ICH is equipped with protection circuit to protect the power amplifier circuit from high SWR and temperature. When a high SWR antenna or no Using this function you can transmit without pushing and holding the PTT switch. To prevent accidental, continuous transmissions with this function, the transceiver has a time-out timer.
Set the subaudible tone repeater tone encoder function ON. Thus the steps 3 and 4 may not be necessary, depending on the setting. Independent offset frequencies can be set for each operating frequency. Each of these channels can be individually programmed with operating frequency pgs.
I Programming a memory channel VFO settings, including the set mode contents such as sub- audible tone frequency, offset, can be programmed into a memory channel.
ICOM ICH OPERATING MANUAL Pdf Download.
This is useful when search- ing for signals around a memory channel frequency and for recalling the 272h frequency, subaudible tone frequency etc. I Memory clearing Contents of programmed memories can be cleared blankedif desired.
Even if the memory bank contents are cleared, the memory channel contents still remain pro- grammed. I Call channel selection Call channel is pre-programmed memory channel that can be accessed by simply pushing call channel button. I Scan types Scanning searches for signals manuaal and makes it easier to locate new stations for contact or listening purposes. Used as the simplest scan Band Band without any preliminary set- edge I Scan edges programming Scan edges can be programmed in the same manner as memory channels.
I Skip channel setting The memory skip function speeds up scanning by checking only those memory channels not set as skip channels. Set skip channels as follows. The display shows that memo- MAIN ry channel 1 is set as a skip channel.
Icom ICH Manuals
The selected resume condition is also used for priority watch. The transceiver has 3 priority watch types to suit your needs. You can also trans- mit on the VFO msnual while the priority watch operates. The watch resumes according to the selected scan resume condition.
For 2702h channel watch: Select the desired memory channel. For memory scan watch: The levels 1 dark to 4 bright: During duplex repeater operation, transmit frequency shifts the set frequency. When narrow is set, the transmission deviation and reception passband width become half of the wide setting approx. This setting can be set for each memory, call and VFO inde- pendently.
I Initial set mode The initial set mode is accessed at power ON and al- lows you to set seldom-changed settings. This function cuts a transmission OFF after icomm min. The fan rotates during transmit and for 2 min.
The fan continuously rotates. The operating frequency can be selected continuously. Typically, AM mode is used for the air band — D bps packet operation q Connect the transceiver and a TNC as illustrated below. D Adjusting the transmit signal output from the TNC When setting data transmission speed manuall bps, the data signal coming from the TNC is applied exclusively to the in- ternal limiter circuitry to automatically maintain band width.
Scan does not operate. Page of 96 Go. This device complies with Part 15 of the FCC rules. Table of Contents Add to my manuals Add. Page 3 For U. Page manuual I Selecting output power Using The Mounting Bracket D Location Select a location which can support the weight of the trans- ceiver and does not interfere with driving.
Battery Connection See p. I Repeater Operation I Repeater operation 1. Basic Operation I Receiving q Set the audio level for the main band.
I Transmitting This may distort the signal. Repeater Operation Set the subaudible tone repeater tone encoder function ON. Page 41 z Set the receive frequency repeater output fre- DUP— quency on the main band. I Programming A Memory Channel I Programming a memory channel VFO settings, including the set mode contents such as sub- audible tone frequency, offset, can be programmed into a memory channel.
I Memory Clearing I Memory clearing Contents of programmed memories can be cleared blankedif desired. Call Channel Operation I Call channel selection Call channel is pre-programmed memory channel that can be accessed by simply pushing call channel button.
Scan Operation I Scan types Scanning searches for signals automatically and makes it easier to locate new stations for contact or listening purposes.
I Skip Channel Setting I Skip channel setting The memory skip function speeds up scanning by checking only those memory channels not set as skip iccom.
Page 89 D Adjusting the transmit signal output from the TNC When setting data transmission speed to bps, the data signal coming from the TNC is applied exclusively to the in- ternal limiter circuitry to automatically maintain band width.
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