Texas Instruments TRF1500 用户手册
SWRA004A
46
TRF1500 Integrated Dual-Band RF Receiver User’s Guide
High-Band Cascaded: Power Leakage LO In to RF In
Control state: 111001
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 J20. 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.
input port J20. 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 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 RF Port, J20, to the spectrum analyzer.
4) Measure the LO leakage power.
High-Band Cascaded: Third Order Input Intercept Point (IIP3)
Control state: 111001
SEE APPENDIX A: TEST BENCH SETUPS
Test setup Figure 21
The third order input intercept point is the level of the RF input
power at which the output power levels of the undesired
intermodulation products and the desired IF products are equal.
The measurement is performed using three RF sources and a
spectrum analyzer.
power at which the output power levels of the undesired
intermodulation products and the desired IF products are equal.
The measurement is performed using three RF sources and a
spectrum analyzer.
1) Set the first RF source input power (RF P
in
) and frequency (F
1
)
(see Table 4).
2) Set the second RF source frequency to the first RF frequency
plus 120kHz; F
2
.
3) Using a RF combiner, connect the RF sources to the EVM RF
input port, J20.
4) Set the LO source frequency and input power (see Table 4).
Connect the LO source to the EVM LO input port, J12.
5) Set the spectrum analyzer to measure at the IF frequency (F
IF
)
(see Table 4).