PC with SmartRF Studio

installed

SmartRF Eval Board

and Eval Module

SmartRF Eval Board

and Eval Module

TX

RX

Shielded Box

Variable

Attenuator

www.ti.com

Receive Testing Without LabVIEW

6

Receive Testing Without LabVIEW

Refer to Table 11 for a summary of the various receiver tests to be performed without using LabVIEW.

Table 11. Receive Test (without LabVIEW) Summary

Section

No

Item

Result

6.1

Receiver Sensitivity

6.2

Interference Testing

6.3

Interference Testing with Signal Generator

6.1

Receiver Sensitivity

CAUTION

One issue to remember with the configuration described here is that RF power

can reach the receiver outside the path through the coaxial cable and

attenuators. This issue is of greater concern if the two boards are placed very

close together and the receiver is operated with very good sensitivity (that is,

low data rate and receiver bandwidth). This problem is observed if the receiver

can decode packets even with very high attenuation, and it is not possible to

find the sensitivity threshold correctly. To avoid this problem, one of the boards

should be placed in a shielded box where the shield is grounded, and the only

opening in the box is a small hole for cables to exit. This configuration reduces

radiation to a minimum.

Purpose: To verify that the receiver sensitivity conforms to performance standards.

Pass Condition: See respective standards document for specifications and pass conditions.

Test Environment: Figure 11 illustrates the test setup for receiver sensitivity.

Figure 11. Receiver Sensitivity Test Setup

17

SWRA370

– August 2011

Basic RF Testing of CCxxxx Devices

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