Before you start connecting to PC, Please download the following files.
Power SDR from the embedded webpage below.
Arduino hex file.
Arduino COM port driver
After all successful installation, Follow the steps down below ......
Put Any number in serial Number area
select unsupported card if your spec not listed then click ok
How to Calibrate Frequency
Press the setup button on the board, it will appear as shown on the LCD. Turn the rotary as desired (change the step frequency can be through Powersdr) to change the CoreRef value then press reset on the arduino to save. Repeat the stage again until you get the desired frequency.
Checking the frequency without measuring instruments, by observing the center freq at a frequency of 10Mhz, if it is right in the middle, then by itself another freq will follow. Please visit https://youtu.be/9BMpdhnew9c for demo.