AN646 Datasheet, PDF (1/46 Pages) Silicon Laboratories – Si477X EVALUATION BOARD TEST PROCEDURE

AN646
Si477X EVALUATION BOARD TEST PROCEDURE
1. Introduction
This document describes the test procedures used in Silicon Laboratories for the Si477x evaluation boards (EVB). It
is also intended to enable customers to exactly replicate Silicon Laboratories' test environment so that variances in
customers' and Silicon Laboratories' measured results can be accurately compared. This document covers AM,
FM, RDS and weather band tests for the Si477x receivers. The pass/fail criteria for each test are provided in the
respective data sheets. The Si477x evaluation boards and software provide a platform to program, test, and
operate the Si477x devices. The system consists of two boards: a baseboard and an RF daughter card. The
baseboard provides all necessary support functions, including a USB-based programming interface, analog audio.
The RF daughter card changes for each device. Refer to the individual EVB User's Guides for detailed explanations
of the EVB hardware and software.
2. FM Tune Testing
This section covers testing the FM specifications for the Si477x receiver. Table 1 provides a summary of FM tests and
equipment.
Table 1. FM Tuner Test Equipment
Test
Equipment
Sensitivity
AM Suppression
Audio Output Voltage
Audio THD
Audio SNR
Stereo Separation
Audio Output L/R Imbalance
Audio SINAD
Stereo Pilot Rejection
Image Rejection
Adjacent/Alternate Channel Rejection
IP3
Rohde & Schwarz UPV Audio Analyzer
Rohde & Schwarz SMB + Stereo/RDS Signal Generator #1
USB Power Supply*
Equipment above plus:
Rohde & Schwarz SMB Signal Generator #2
Mini Circuits ZFRSC-42-S+ 0-4.2GHz Combiner
Note: The user has the option of powering up the EVB through USB, L2 (external 9V), or J1/J2 (two Agilent E3646A power
supplies).
Rev. 0.1 12/11
Copyright © 2011 by Silicon Laboratories
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