IC-R9000 & digital modes

IK2GNP

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Apr 26, 2024
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Hello everybody, recently I got an IC-R9000 and I'm very very happy with it.
Now I would like to add something to decode VHF/UHF digital modes like DMR, D-Star, C4FM, Tetra and so on.
I don't want to use my computer for radio listening, so no USB sticks, software and so on.
I'm interesting only in standalone, hardware-based devices. Something to connect to the 10.7MHz IF out of my R9000.
I know that an AOR decoder was available in the past, but it did not decode Tetra and it seems discontinued. And, last but not least, recently I had a bad experience with AOR (got a VERY EXPENSIVE AR5700D, sold after just two months, absolutely disappointing in my opinion).
Anyone could suggest a good solution? Thanks.
 

kdeke

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Feb 14, 2022
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Usa
An AR-DV1 (in auto mode) connected to 10.7MhHz IF-out on IC-9000 will automatically decode a lot. (set and forget)
As the IC-R9000 IF-out inverses the spectrum, the AR-DV1 IF input needs to be reversed, this functionality is available on AR-DV1.
You also could use an AR-DV10, however the AR-DV10 doesn't have this reverse function, so some modes won't work. (AOR document: http://www.aorja.com/receivers/pdf/experiment_with_AR-DV10.pdf)
It also might require a dc-stop, as the IC-R9000 might output a DC value.
An example on youtube with IC-R8600 and AR-DV1:
 

IK2GNP

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Apr 26, 2024
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Italy
Hmmmm AOR..... again???? Never tested the DV1, but as mentioned above the flagship AR5700D was a big big disappointment for me.
However, in your suggested configuration I believe that the DV1 input must stay locked at 10.7MHz, right?
I did not know that it can decode digital modes in "HF bands" too.
So, if I understand correctly, the DV1 would become a simple "decoder", and all tuning operations would be performed by the R9000.
If it works, I think it could be a good solution.
Is the DV1 able to decode all digital modes automatically including Tetra?
I do not believe that the IF out of the R9000 provides any voltage. It surely occurred with the R8500 that I owned in the past because that output jack was used to supply the TV module, but don't think in the R9000. Please correct me if I wrong.
Thank you for your suggestion. Waiting for more possible options, if any.
 

kdeke

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Feb 14, 2022
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Indeed the AR-DV1 needs to remain on 10.7Mhz and tuning is done on the IC-R9000.
The decodable modes for the AR-DV1 are the same as the AR5700D, mostly used on vhf/uhf.
AR-DV1 indeed decodes unencrypted Tetra.
As far as DC voltage on IF out is concerned, some Icoms indeed provided that, for the moment I have no idea if the IC-R9000 does it, just added a warning that one needs to check before use.
And yes, the latest AOR equipment is sometimes quite buggy.
 

bagmouse7

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Jan 19, 2003
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The only standalone, hardware based digital decoder that I am aware of is from your old friends at AOR.
The AOR ARD300:
Maybe some others know of some other solutions.

You may want to look at using some software packages like DSD+ or SDR# to decode digital modes with the discriminator output.
I have used these packages with an R8600 to decode DMR and other unsupported modes.
Good luck!
 
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