Texas Instruments TRF1500 Low-BandCascaded Test Guide, LOW-BandCascaded Power Conversion Gain

SWRA004A

Low-Band Cascaded Test Guide

This section involves measuring the cascaded performance of the Low Band LNA, Low Band MIXER and Low Band IF Amp. An external SAW filter is utilized to complete the RF receiver section. All tests apply for an IF output terminated into a 1 kΩ differential load. To match the differential IF output to the 50 Ω test equipment a transformer balun is used. All unused ports are terminated into 50 Ω.

Table 3. LB LNA, LB Mixer, SAW Filter, and LB IF Amp Parameters

PARAMETERS	Min	Typ	Max	UNIT
RF Frequency Range	869	881.5	894	MHz
LO Frequency Range	979.52	992.02	1004.52	MHz
IF Frequency		110.52		MHz
RF Input Power		-30		dBm
LO Input Power		-5		dBm
Power Conversion Gain		26.0		dB
Power Conversion Gain Reduction		19.0		dB
Noise Figure		2.5		dB
RF Input Return Loss		5.6		dB
LO Input Return Loss		16.5		dB
LO Buffer Output Power		-10.3		dBm
Power Leakage LO In to RF In		-53.0		dBm
Third Order Input Intercept Point (IIP3)		-9.7		dBm
1dB RF Input Compression Point		-21.0		dBm
1dB Blocking Point		-18.0		dBm

LOW-Band Cascaded: Power Conversion Gain

Control state: 011000

SEE APPENDIX A: TEST BENCH SETUPS

Test setup Figure 20

The low band power 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 3). Connect the RF source to the EVM RF port, J10.

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