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For this program, the ports are numbered 1, 2 and 3. Where port one is the CI-V port closest to the
USB connector. Port 2 is in the middle, and Port 3 is the port closest to the coaxial DC power con-
nector.
Using a CI-V cable, connect it from one port to another port on the router.
If during each 100 ms test period, if a message was properly sent from port 1 to port 2, the message
"1->2" will appear on computer terminal. Likewise if a message is sent properly from port 2 to 3,
the message "2->3" will appear on the computer terminal.
Below is an example output as seen on PuTTy. Each line of output represents the result of the
100ms test period.
CIV Interface Test Program
No connection
No connection
1->2 2->1
1->2 2->1
1->2 2->1
1->2 2->1
1->2 2->1
No connection
No connection
No connection
No connection
1->3 3->1
1->3 3->1
1->3 3->1
1->3 3->1
For about a half a second, the cable was connected between ports one and two. The fact that both 1-
>2 and 2->1 appears on a single line means that messages went in both direction properly. The ca-
ble was quickly moved from port 2 to port 3, and messages were then successfully sent in both di-
rection. The above example shows that all ports are working properly. To double check, connect
port 2 to port 3.
If there is always "No connection" regardless on cable position... something is wrong. Maybe the
cable is bad? Say is 1->2 appears but 2->1 does not appears, that means that either port 2 isn't send-
ing, or port 1 isn't receiving. Moving the cable around will quickly determine where the problem is.
Note: This test is not effect by, nor does it change ANY of the configuration of the router.
Note: This program is also useful for checking CI-V cables.
Hints and Kinks
CI-V Message Sniffer:
A useful tool for debugging and understanding is the Icom CI-V message is the Sniffer Tool.
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