DMR DSD+ unstable result

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mryamac

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Jul 17, 2017
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Hello All,

I have couple of hytera and repeater. for MS frequencies are set to RX=442612500 Hz and TX=447612500. Respectively for BS RX frequency is 447612500 and TX frequency is 442612500. My setup is like this.

When I try to capture packets with DSD+ (Airspy+Sdrsharp), most of times DSD+ does not show anything. Rarely it shows voice is captured about 4 sec. Sometimes while listing 447612500 frequency DSD shows BS packets; but they must be MS. What might cause this problem? I can work only in a room with all hytera and repeater with low power. Noise may cause this problem or what else? How can I handle this issue?
 

jhampton2000

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Dec 19, 2005
Messages
850
Are you able to get DSD+ to decode other digital signals, or is this the only problem setup you have? I'd recommend you try and get it working on a more distant repeater signal first.

If that's ok, then I;d suggest the two most likely problems to tackle are:
- when listening to the repeater output frequency, at that range, you'll be totally overloading the receiver
- when listening to the mobile output frequency, you need to be tuned to precisely the correct frequency for good decodes: try offsetting the tuning a little.
 

mryamac

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Joined
Jul 17, 2017
Messages
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Your advise is worked. I put some stuff far away then I got expected results thanks.
 
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