[Dstar] Further notes regarding DV cross-banding via the IC2820H -- update1

[Nik Presser]

G'day all, 

Sorry about the last couple of updates - perhaps I should shutup until I'm completed all of the testing instead of posting these little steps along the way :-) 

Hopefully these notes are of some use to someone... 

Ok. I've now discovered a harmonic issue during the cross-band inside the IC-2820H. 

Dividing the 70cm freq you're using in one band by the 2m freq you're using in the other band and you end up with a figure very close to a factor or multiple of 3, you may end up with a locked-on TX within the rig. If you can end up with a combination of something about 0.01243 higher or lower than a factor of 3, then the internal cross-band repeat will function ok without internal TX lockups. So for example, a factor of 2.98766 will cause the rig to lock up the TX. 

This may vary across different IC-2820H's but this is what I've found thus far. 

Cheers,

Nik Presser
VK3BA  
Geelong
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