Texas Instruments TRF1500 - Manual (Page 48)

SWRA004A
TRF1500 Integrated Dual-Band RF Receiver User’s Guide 49
8) Calculate 2 X 2 spur performance as 2 X 2 spur performance
= 1 P
out
- 2 P
out.
High Band: 3X3 Spur Performance
Control state: 111001
SEE APPENDIX A: TEST BENCH SETUPS
Test setup Figure 20
3X3 Spur Performance is measured at IF output port J21. The
measurement is performed using two sources and a spectrum
analyzer.
1) Set the RF source frequency (F
RF
) and input power (see Table
4). Connect the RF source to the EVM RF input port, J20.
2) Set the LO source frequency and input power (see Table 4).
Connect the LO source to the EVM LO input port, J12.
3) Set the spectrum analyzer to measure the output power at the
IF frequency; F
IF
.
4) Connect the EVM IF output port, J21, to the spectrum
analyzer.
5) Measure the output power (1 P
out
) at the IF frequency.
6) Set the RF source Frequency to (F
RF
+ 2/3 F
IF
) and the source
power to -50dBm.
7) Measure the output power (2 P
out
) at the IF frequency.
8) Calculate 3 x 3 spur performance as:
3 x 3 spur performance = 1 P
out
- 2 P
out.