The AK 2650 software and serial interface cable allows the 2650 & 2658 to display screen resolutions on a PC that are four times greater then the 250 points displayed on the horizontal axis of the 2650's LCD display. The 2650 & 2658 samples its input at 1000 points per sweep and it can output these points through its RS 232 port to a PC (the maximum transfer rate is 38,400bps). The AK 2650 not only allows for clearer screen images but it also allows spectrum analyzer setup via a PC.