[ct-user] CT9.27 - IC765

[Dave Potter]

>Date: Wed, 29 Apr 1998 17:22:31 -0500
>From: Ron Chambers <rchambers@aguirre.com>
>To: ct-user@contesting.com
>Subject: [ct-user] CT9.27 - IC765
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>Reply-To: Ron Chambers <rchambers@aguirre.com>
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>
>I just built the computer to radio(ICOM765) interface using the MAX232
>chip. The radio sends proper frequency and band changes to the
>computer and it is displayed perfectly on the computer and CT responds
>fine, including a packet 'anouncement'....BUT the reverse is not true,
>nothing happens at the radio if I give CT a band-change, a frequency
>change, or a packet spot 'grab' instruction....I get the message RADIO
>NOT ECHOING......I have been thru the interface looking for wiring errors,
>changed chips, etc but nothing changes.......
>
>Any suggestions? Any  quirks to a CT/ ICOM interface I am missing?
>
>Ron.K5PN
>
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>


Sounds like you don't have the right IC-765 address. The -765 sends its
band change packets to the broadcast address which the computer picks up.
Going the other way, there needs to be a specific address in the packet or
the -765 ignores it. I don't have my references here, but the symptoms are
clear. In the -765 manual, it shows a dip switch that you can set to
determine the address on the CI-V bus. Check that switch to be sure it is
at the default value.

73

Dave
K1MBO
_____________________________________________________________
David Potter					617-873-2308
GTE Internetworking/BBN Technologies	617-873-5672 Fax
733 Concord Ave
Cambridge, MA 02138				dpotter@bbn.com

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