I have two SDRPlay receivers. One is a RSP1A and the other is a RSP2. Both are working fine when I run two simultaneous instances of HDSDR - each one tuned by a separate SO2R Radio. I have been trying to get the N1MM Spectrum Display to work with one spectum Display window using the RSP2 and the other display using the RSP1A.
When I have one N1MM spectrum display up and running, I see both the RSP1 and RSP2 showing in the I/Q tab and I can select either one. Either one will work fine.
Problem: If I use the RSP2 (or visa versa) for the first display, the one display works. If I then try to use the RSP1A in the second display (note: the RSP1A is showing in black in the IQ tab), I get an error message when I select the source as"I/Q via ExtIO.dll". The error message says "Failed to find available RSP1A". What am I doing wrong? I would appreciate any suggestions.
Presently, to get around this problem by using WaterFall Band map with the RSP1A., which works. I would rather use the RSP1A directly into the spectrum display if possible.
Thanks Bill N4iQ