Texas Instruments TRF1500 - Manual (Page 44)

SWRA004A
TRF1500 Integrated Dual-Band RF Receiver User’s Guide 45
1) Set the network analyzer to measure the low band RF
frequency (see Table 4).
2) Set the power range to -35 dBm through -20 dBm, and then
set the input power to -30 dBm.
3) Perform a full one-port calibration on port 1 of the network
analyzer.
4) Set the network analyzer to measure S11.
5) Connect the EVM RF input, J20, to port 1 of the network
analyzer.
6) Measure the RF input return loss.
High-Band: LO Buffer Output Power
Control state: 111001
SEE APPENDIX A: TEST BENCH SETUPS
Test setup Figure 20
This section involves measuring the Low Band LO Buffer Output.
All unused ports will be terminated into 50
Ω
. The LO buffer output
power is measured at the EVM low band LO output port J23. A
transformer balun is used to convert the differential output to a
single ended output. The measurement is performed using a RF
source and a spectrum analyzer.
1) Set the LO source frequency and input power (see Table 4).
Connect the LO source to the EVM LO input port, J12.
2) Set the spectrum analyzer to measure at the LO frequency
(see Table 4).
3) Connect the EVM LO buffer port, J23, to the spectrum
analyzer.
4) Measure the LO buffer output power.