Texas Instruments TRF1500 manual 6Calculate the Cascaded Gain as

SWRA004A

2)Set the LO source power (LO Pin) and the desired frequency (see Table 4). Connect the LO source to the EVM LO input port, J12.

3)Set the spectrum analyzer to measure at the IF frequency (see Table 4).

4)Connect the EVM IF output port, J21, to the spectrum analyzer.

5)Measure the IF output power (IF Pout) at the IF frequency with the spectrum analyzer.

6)Calculate the Cascaded Gain as:

Gain = (IF Pout - RF Pin) + Transformer Loss. The transformer loss is 1.8dB.

High-Band Cascaded: Power Conversion Gain Reduction

Control state: 111011

SEE APPENDIX A: TEST BENCH SETUPS

Test setup Figure 20

The Power conversion gain reduction is the delta between the cascaded IF Pout and the strong signal IF Pout when the strong signal is enabled. Enabling the strong signal turns off the LNA. It is measured using a RF source and a spectrum analyzer.

1)Set the RF source power (RF Pin) and the desired frequency (see Table 4). Connect the RF source to the EVM RF input port, J20.

2)Set the LO source power (LO Pin) and the desired frequency (see Table 4). Connect the LO source to the EVM LO input port, J12.

3)Set the spectrum analyzer to measure at the IF frequency (see Table 4).

4)Connect the EVM IF output port, J21, to the spectrum analyzer.

5)Measure the output power at the IF frequency (IF Pout) with the spectrum analyzer.

6)Enable the strong signal. Measure the output power at the IF frequency (SS IF Pout) with the spectrum analyzer.

7)Calculate Power conversion gain reduction as:

Power Conversion Gain Reduction = (IF Pout - SS IF Pout).

TRF1500 Integrated Dual-Band RF Receiver User’s Guide 41