Texas Instruments TRF1500 manual Control state SEE APPENDIX A TEST BENCH SETUPS

SWRA004A

-31	-12	19
-30	-11.2	18.8
-29	-10.2	18.8
-28	-9.2	18.8
-27	-8.4.	18.6
-26	-7.6	18.4
-25	-7.8	18.2
-24	-6.0	18.0←1dB Compression Point
-23	-5.5	17.5

Low-Band Transmit Mixer: Second Order Input Intercept Point (IIP2)

Control state: 010100

SEE APPENDIX A: TEST BENCH SETUPS

Test setup Figure 21

Input intercept point is the level of input RF power at which the output power levels of the undesired intermodulation products and IF products are equal. The second order intercept point is measured at the IF output port, J31.

1)Set the RF source input power (RF Pin) and frequency (see Table 5).

2)Set the LO source input power and frequency (see Table 5). Connect the LO source to the EVM LO input port, J12.

3)Set the spectrum analyzer to measure at the IF frequency (see Table 5).

4)Connect the EVM IF output port, J31 to the spectrum analyzer.

5)Measure the IF output power (IF 1Pout) at the IF frequency.

6)Increase the RF frequency by half the IF frequency.

7)Measure the IF output power (IF 2Pout) at the IF Frequency.

8)Calculate IIP2 as: IIP2 = RF P in + [IF 1Pout - IF 2Pout]

TRF1500 Integrated Dual-Band RF Receiver User’s Guide 57