Use the following guidelines for S-parameter measurement:
- As Figure 3-1 shows, the S-parameter is typically measured
using a Vector Network Analyzer (VNA). For
measuring the TRF0206-SP
EVM, a 3-port VNA is recommended which can
generate single-ended and receive differential
signals at the input
and
output ports of the EVM respectively.
- Before connecting the RF coax cables to the EVM, you must calibrate the VNA along with the cables using a calibration kit.
- Determine the frequency sweep and output power level from the VNA is set within the linear operating range of the TRF0206-SP devices. The resolution bandwidth (RBW) and dynamic range of the VNA can be adjusted to give the adequate sweep time for the measurement.
- Accounting for board trace losses at the input
and output side of the device during gain measurements is important. Figure 3-2 gives typical input and output trace losses measured on the EVM.