Texas Instruments TRF1500 - Manual (Page 30)

SWRA004A
TRF1500 Integrated Dual-Band RF Receiver User’s Guide 31
LOW BAND: LO Buffer Output Power
Control state: 011000
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 J13. 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 3).
Connect the LO source to the EVM LO input port, J12.
2) Set the spectrum analyzer to measure at the LO frequency
(see Table 3).
3) Connect the EVM LO buffer port, J13, to the spectrum
analyzer.
4) Measure the LO buffer output power.
Low-Band: Power Leakage LO In to RF In
Control state: 011000
SEE APPENDIX A: TEST BENCH SETUPS
Test setup Figure 23
The LO leakage at the RF port is measured at the low band RF
input port J10. Power leakage is a measure of power in dBm that
couples to the RF port. The measurement is performed using a
RF source and a spectrum analyzer.
1) Set the LO source frequency and input power (see Table 3).
Connect the LO source to the EVM LO input port, J12.
2) Set the spectrum analyzer to measure at the LO frequency
(see Table 3).
3) Connect the RF Port, J10, to the spectrum analyzer.
4) Measure the LO leakage power.