Any thoughts on this... the IC R 75 gives me an offset at 601.5 I have been able to change ARGO so the trace rolls out at 600 which is OK But when I attempt to make 601.5 read 300 ,,something changes and doesnt indicate an input ,,,, goes dead '' no reading,, and the scale doesnt indicate anything proper. Is this a fault with Win XP ?? Or is there a trick I dont understand with ARGO Bob K3DJC