I have been using K3/0 and RC1258Mk2 at my home to connect to a K3 at remote transmitter site for some time and all is well. Both RRC''s have 2.87 firmware.
Today I took the K3/0 and RC1258MK2 units to the transmitter site and connected using the "local LAN' i.e. behind the NAT firewall and using the local subnet address for the 'radio' unit and using a DHCP supplied local address for the control unit. Connection was established immediately and receiver tuning and audio is fine.
But transmit audio is NOT. On air reports it as distorted and in the monitor it sounds very loud, noisy, and rough, as if the gain is way too high. With K3 mic gain at 0 there is no audio at all, with it set to 1 it is loud and distorted, and I get almost full scale ALC indication..
My first thought was RF getting into the control unit, and I cannot totally eliminate this as a cause, but there is no observed difference in the transmit audio with transmit power at 1 W versus 100 W. I am using three separate power supplies for the K3, RRC, and K3/0.
Has anyone else encountered and solved this problem already?
Do I need to play with the codec gain and other settings to resolve this?
What else should I try?
73 John N5CQ
