Texas Instruments TRF1500 manual High-Band LO Buffer Output Power

SWRA004A

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.

TRF1500 Integrated Dual-Band RF Receiver User’s Guide 45