Re[4]: [Icom] r7000 ci-v troubleshooting

Thu, 13 Feb 2003 20:32:22 -0500

OK. Lets take this step by step.

To what baud rate and wordlength is your R7000 set?

How does your Deltacomm interface obtain power? Is it connected to a power
supply, or does it expect power via a serial port's modem control signals?

Does your R7000 have a "CI-V Transceive setting"? If so, enable it.

Run Commander, set its serial port parameters to match those of the R7000,
and if the Deltacomm needs power from a modem control signal configure
Commander to provide it by setting that modem control signal to "always on".

Examine the CI-V bus with your scope probe; if you don't see 5 vdc, there's
a problem, and you should stop.

If your R7000 has a "CI-V Transceive setting, set Commander to capture
messages, and move the R7000's tuning dial. Do any messages appear in
Commander's window? If so, please save them to a file attached to an email
message to me. If not, do you see any activity on the scope (set the scope's
horizontal timing to show 10 bits worth of serial port data at the
appropriate baud rate; 9600 baud, for example, is ~100 us per bit, so you'd
want a 1ms sweep time which is a 1khz sweep frequency, triggered on a
downward signal transition).

Click Commander's "Interrogate Radio Freq" button a few times -- does your
scope reveal activity on the CI-V bus?

    73,

        Dave, AA6YQ

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of John Blue
Sent: Thursday, February 13, 2003 20:14 PM
To: Dave, AA6YQ
Subject: Re[4]: [Icom] r7000 ci-v troubleshooting

DA> Have you verified that your RS232-to-TTL level converter is
DA> working in both directions?

I have built all the designs that are on the internet.  The only one
that I can marginally get funtional is the Deltacomm interface.  The
diag software that ships with it has you manually open and close
squlech, and the three times that I was able to get that far .. it
worked as designed.

DA> CI-V is just an open-collector TTL bus; do you have access to an
DA> oscilloscope?

aye.  Whatcha got in mind?

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