DUT
Signal Generator
RF
Power
Supply
Spectrum Analyzer
J6
J3
J 7
J11 J12
5V
Gnd
Computer
Terminal
J1
J10
Signal Generator
LO
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EVM Test Configuration
3
EVM Test Configuration
3.1
Test Block Diagram
The test setup for general testing of the TRF3711xx is shown in
Figure 3. Test Setup Block Diagram
3.2
Test Equipment
The following equipment is required for completing RF testing:
●
Power supply with current readout
(Agilent E3631 or equivalent)
●
Signal generator for input signal
(Agilent E4438C or equivalent)
●
Signal generator for LO signal
(Agilent E4438C or equivalent)
●
Spectrum analyzer
(Agilent E4440A or equivalent)
●
Programming computer
3.3
Calibration
The RF cables should be good-quality RF cables because of the high-frequency signals.
NOTE:
There is approximately 1 dB of insertion loss for the input traces and balun on the printed
circuit board (PCB).
•
Measure the insertion loss of the RF input cable and use this value to compensate for the desired input
power.
•
Measure the insertion loss of the LO input cable and use this value to compensate for the desired LO
power.
•
BB loss factor: If using the onboard transformers to interface with 50-
Ω
test equipment, then there is
approximately 12 dB of loss associated with the voltage transformation and transformer loss.
4
Basic Test Procedure
This section outlines the basic test procedure for testing the EVM. This section is divided into three test
sections: DC Test, Basic RF Test, and Advanced RF Test. The first section requires only power supply
with current readout and a computer for programmability. The second section requires basic RF test
equipment and basic technical know-how. The third section is for reference and requires specialized
equipment and setup. Only
and
are required to ensure basic functionality.
4.1
DC Test
1. C5 V to J11; connect ground to J12.
2. Engage power supplies.
3. Verify current is 385 mA ± 25 mA.
5
SLWU069B – February 2010 – Revised November 2010
TRF3711xxEVM
Copyright © 2010, Texas Instruments Incorporated
