K-band Noise floor characterization Procedure

Objective 
 Measure the RSSI obtained though all the 1GHz band with only noise and characterize it. 
 
 Steps to follow 
 
 
 Turn on equipment 
 
 Spectrum analizer 
 Power supply 
 
 
 
 Configure to desired parameters 
 
 Spectrum analizer
 
 Set center frequency in the middle of RSSI input band (869MHz) 
 Set enough span to observe the RSSI input band (30MHz) 
 Set RBW and VBW to an adecuate level 
 
 
 Power supply
 
 Set Voltage to 3.3V 
 Set current limit to 0.3A 
 
 
 
 
 
 Set up nucleo board and PC 
 
 Make sure the proper code is loaded into the nucleo board 
 
 
 
 Make connections 
 
 Connect the power supply to the payload:
 
 Vcc to PoL (RED) 
 GND to GND (BLACK) 
 
 
 Connect the DAC output to the DAC_In (GREEN) 
 Connect the ADC input to the ADC_Out 
 Load the IF Input with a 50 Ohm perfectly matched load. 
 Connect the spectrum analizer to the switched measuring pin (PURPLE) 
 
 
 
 Connect PC to ground (plug in the charger). 
 Connect necleo board to computer by USB. 
 
 
 
 Power on power supply. 
 
 
 Begin the measurements procedure 
 
 Run the flashed program in Debug mode. 
 Measure the signal observed with the spectrum analyzer. 
 Disconnect the spectrum analizer connected to the switched measuring pin (PURPLE). 
 Once the program stops at the breakpoint, collect the calculated mean and plot it in a data processing software like Matlab. 
 
 
 
 Analyze the collected data.