User's Manual

65
MEASURE INSTRUMENT
Calibration of the Output Filter
Network analyser or alternately Spectrum
analyser with tracking generator and SWR
Bridge
CALIBRATION PROCEDURE
- Instrument list
Output Filter Section
 Calibrate the Network Analyser after setting a 100MHz span centred on 100MHz (10MHz/div - 5dB/div).
 Connect the input of the filter to port 1 of the Network Analyser.
 Connect the output of the filter to a dummy load. Display the Reflection coefficient (parameter s11). The
calibration consists in acting on the coils (L9, L10, L11, L12) until a curve as below.
Polarisation of the Transistor
 After verifying that the power supply is properly connected to the passing capacitor next to the SMB
connector, and before proceeding with the polarisation of the MOSFETs, disconnect the L8 and L13