Remote Rig
RRC 1258 Support in English => General discussion forum => Topic started by: VE6WZ on 2017-10-23, 17:34:00
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Using both K3 twin and Yaesu FTdx-9000d radios with RCC1258 units for a long time I have had a bad audio hiss even with the volume turned to zero.
Solution: Do NOT use audio CODEC with 12 bit. I now use audio quality 2 which is 16 bit.
I found that even higher quality settings using 12 bit will cause audio hiss. 16 bit all ok.
I'm posting this in case others have the same problem.
de steve ve6wz.
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Hi Steve
thanks very much
just starting with remote and many things to improve. Is very noticeable the improvement changing from 12 to 16 bits!
73,
Jorge
CX6VM/CW5W
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Thanks. 16-bit worked here as well. I was using Quality-0, "A-Law 8 kHz" and we had hiss. It came from the radio end, and I thought it was the radio generating this (one channel was speaker audio that might have had audio PA hiss, but the second audio channel was low-level [300 mV] discriminator audio from a Motorola XPR4550 mobile radio). Both channels had equal hiss before the fix. Both are now fixed.
I modified the second audio channel input (ring, not tip) on the radio end to make it high-impedance (>100k ohm) so it would not load down the discriminator line. This channel still has a bit more hiss, but its more than tolerable.
N6LDJ