100 kHz

-

20 dB or more

-

30 dBm or less

3.5 MHz

2450

2455

2460

2458.5

MHz

PC with SmartRF Studio installed

SmartRF Eval Board

and Eval Module

Spectrum Analyzer

www.ti.com

Transmission Tests

5.2

Power Spectral Density Mask

Purpose: To verify that the PSD of the DUT is able to conform to stated conformance limits.

Pass Condition: Refer to the respective standards document. Table 6 shows an example for the IEEE

802.15.4 standards requirements. Figure 4 illustrates the requirements.

Table 6. IEEE 802.15.4 Standards Requirements (Example)

Frequency

Relative Limit

Absolute Limit

|f

– f

–20 dB

–30 dBm

Figure 4. Power Spectral Density Mask Requirements

Test Environment: Figure 5 shows the test setup.

Figure 5. Power Spectral Density Mask Test Setup

Procedure:

Step 1.

Connect the instruments and test board as shown in Figure 5.

Step 2.

Set the EM to continuous TX mode through SmartRF Studio.

Step 3.

Verify that the PSD mask conforms to the given standard on the spectrum analyzer.

Table 7. Power Spectral Density Mask Test Results

Design Specification

PSD Relative Limit (%)

(%)

Pass/Fail?

Freq 1 (MHz)

Freq 2 (MHz)

Freq 3 (MHz)

xx

xx

Test Results:

13

SWRA370

– August 2011

Basic RF Testing of CCxxxx Devices

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