Texas Instruments TRF1500 manual Low-BandReceiver Mixer Stand-AloneTest Guide

SWRA004A

Low-Band Receiver Mixer Stand-Alone Test Guide

This section involves measuring the Low Band Receiver Mixer. All unused ports will be terminated into 50 Ω. Before measuring the low band Mixer separately, the EVM board must be modified as follows: Remove C12 and place C54. The EVM board is now modified to use J15 as the input port of the Receiver Mixer.

Table 8. Low-Band Receiver Mixer Parameters

PARAMETERS	Min	Typ	Max	UNIT
Rx Mixer Input Frequency	869	881.5	894	MHz
LO frequency	979.52	992.02	1004.52	MHz
Rx Mixer Output Frequency		110.52		MHz
RF Input Power		-30		dBm
LO Input Power		-5		dBm
Power Conversion Gain		12		dB
RF Input Return Loss		9		dB
Power Leakage LO In at RF In		-50		dB
Noise Figure		7.5		dB
1dB Input Compression Point		-6		dBm
Third Order Input Intercept Point(IIP3)		3.5		dBm

Low-Band Receiver Mixer: Power Conversion Gain

Control state: 011000

SEE APPENDIX A: TEST BENCH SETUPS

Test setup Figure 20

The receiver mixer conversion gain (dB) is the measured power (dBm) at the IF frequency minus the RF source power (dBm). 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 8). Connect the RF source to the EVM RF port, J15.

2)Set the LO source power (LO Pin) and the desired frequency (see Table 8). Connect the LO source to the EVM LO input port, J12.

3)Set the spectrum analyzer to measure at the IF frequency (see Table 8).

4)Connect the EVM IF output port, J11, to the spectrum analyzer.

TRF1500 Integrated Dual-Band RF Receiver User’s Guide 65