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Texas Instruments TRF1500 manual High-BandTransmit Mixer Test Guide

Models: TRF1500

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SWRA004A

High-Band Transmit Mixer Test Guide

This section involves measuring the High Band Transmit Mixer performance. All tests apply for an IF output terminated into a 1 kΩ differential load. To match the IF output to the 50 Ω test equipment a transformer balun is used. All unused ports are terminated into 50 Ω. Testing the performance of the high transmit mixer can be performed two ways. One being the LO Doubler driven, no EVM modification needed. Two LO is directly driven, before measuring the high band transmit mixer performance the EVM board must be modified as follows: Remove L40 and C41, add C24. This enables the high band transmit to be directly driven by an LO source.

Table 6. High-Band Transmit Mixer Performance Parameters

PARAMETERS	Min	Typ	Max	UNIT

Tx Mixer Input Frequency	1850	1880	1910	MHz
LO Frequency Directly Driven	1733	1763	1793	MHz
LO Frequency Doubler Driven	983.5	998.5	1013.5	MHz
Tx Mixer Output Frequency		117		MHz
LO Input Power		-5.0		dBm
RF Input Power		-30		dBm

Power Conversion Gain		9.9		dB
Noise Figure		12.7		dB
RF Input Return Loss		16.6		dB
Power Leakage Tx In to LO In		-55.5		dB
Power Leakage LO In to Tx In		-69.5		dB
1dB Input Compression Point		-15.7		dBm
Second Order Input Intercept point (IIP2)		27		dBm
Third Order Input Intercept Point(IIP3)		-6.7		dBm

To test the High Band Transmit Mixer parameters use the procedure for the Low Band Transmit Mixer, with the following exception: Control state mode 110100 and when testing the Third order intercept point the RF signal separation is 120kHz.

TRF1500 Integrated Dual-Band RF Receiver User’s Guide

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Texas Instruments TRF1500 manual High-BandTransmit Mixer Test Guide

Contents

Evaluation Board Documentation Wireless Communications Business UnitDigital Signal Processing Solutions July APPLICATION BRIEF SWRA004AIMPORTANT NOTICE TRADEMARKS HP SUPPORT LINE PIC TELEPHONEPIC FAX PIC emailContents Low-Bandand High-BandTransmit Figures TablesAbstract Power Amp Product SupportSwitches SWRA004ARelated Documentation World Wide WebIntroduction External Components Design ConsiderationsBoard Design and Impedance Matching TRF 1500 Dual-BandReceiver Figure 1. TRF1500 Dual-BandReceiver Block DiagramName Table 1. Pin DescriptionsPin Number DescriptionPage Control Code TRF1500 Control StateActive Circuits Page Low-BandLNA Turn on Time Low-BandLNAFigure 3. Voltage Divider at Low-BandLNA Input Low-BandLNA Input Figure 4. Low-BandLNA Input ConfigurationLow-BandLNA Output Surface Acoustic Wave SAW Filter Figure 5. Low-BandLNA Output ConfigurationFigure 6. SAW Filter Insertion Loss Low-BandMixer Figure 7. Low-BandMixer RF Input ConfigurationLow-BandMixer RF Input Low-BandMixer LO Input Figure 8. Low-BandMixer LO Input ConfigurationLow-BandIF Output Figure 9. Low-BandIF Output Configuration Low-BandLO Buffer Amplifier OutputSWRA004A Low-BandCascaded Test Guide LOW-BandCascaded Power Conversion GainLow-BandCascaded Power Conversion Gain Reduction Low-BandCascaded Noise Figure Transmission line, filter and circulator Low-BandCascaded RF Input Return Loss Low-BandCascaded LO Input Return LossLOW BAND LO Buffer Output Power Low-Band Power Leakage LO In to RF InControl state SEE APPENDIX A TEST BENCH SETUPS Low-BandCascaded 1dB RF Input Compression Point Low-BandCascaded 1dB Blocking Point Page High-BandRF Input Figure 12. High-BandRF Input ConfigurationHigh-BandLO Input Note To use the high-bandLO input, remove C40 and Figure 15. High-BandIF Output Configuration High-BandIF OutputHigh-BandLO Buffer Amplifier Output High-BandCascaded Test Guide High-BandCascaded Power Conversion Gain6Calculate the Cascaded Gain as High-BandCascaded Image Rejection High-BandCascaded Noise Figure High-BandCascaded RF Input Return Loss High-Band LO Buffer Output Power High-BandCascaded Power Leakage LO In to RF In High-BandCascaded 1dB Input Compression Point High-BandCascaded 2X2 Spur Performance High Band 3X3 Spur Performance Low- and High-BandTransmit Mixer Low-Bandand High-BandTransmitLow-Bandand High-BandTransmit Mixer RF Input Low- and High-BandTransmit Mixer IF Output Low-BandTransmit Mixer Test Guide Low-BandTransmit Mixer Power Conversion GainLow-BandTransmit Mixer Noise Figure Low-BandTransmit Mixer Input Return Loss 4Set the network analyzer to measure S11 4Measure the TX leakage power Control state SEE APPENDIX A TEST BENCH SETUPS Control state SEE APPENDIX A TEST BENCH SETUPS High-BandTransmit Mixer Test Guide Low-BandLNA Gain Low-BandLNA Stand-AloneTest GuideLow-BandLNA Input Return Loss Low-BandLNA Isolation Low-BandLNA Output Return LossLow-BandLNA 1dB Input Compression Point Low-BandLNA Noise Figure 5To calibrate the NF Meter 8Calculate the Intermodulation Suppression as Low-BandReceiver Mixer Stand-AloneTest Guide Low-BandReceiver Mixer Power Conversion GainLow-BandReceiver Mixer Input Return Loss Low-BandReceiver Mixer Noise Figure aOn the front panel, press the ENR button 10Measure the Noise Figure Control state SEE APPENDIX A TEST BENCH SETUPS Suppression/2 + RF Pin Input Third-OrderIntercept = IntermodulationSWRA004A Appendix A Test Bench Configuration Figure 22. Test Bench Setup Noise Figure