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

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

Test Environment: Figure 8-5 illustrates the interference test setup with a RF generator.

Figure 8-9 Interference Testing with a RF Generator Setup Diagram

Figure 8-10 Interference Testing with a RF Generator Bench Setup - Overview

Figure 8-11 Interference Testing with a RF Generator Bench Setup - Shielded Box

Figure 8-12 Interference Testing with a RF Generator Bench Setup - TX connections.

Procedure:

• Step 1: Connect the instruments as shown on Figure 8-9, Figure 8-10, Figure 8-11, and Figure 8-12.
• Step 2: The TX and RX boards must be set up for the sensitivity test.
• Step 3: The interference signal is set up by using a continuous, unmodulated signal where the frequency can be different from TX and RX unless testing for co-channel interference.
• Step 4: Set the output power of the TX such that the received power at the RX end is 10dB above the sensitivity threshold obtained from sensitivity testing. (Remove 10dB of attenuation from the attenuators after completing the sensitivity test.)
• Step 5: Initially, set the output power of the INT board to the lowesr output power setting possible and start transmitting.
• Step 6: Perform the sensitivity test between the RX and TX board and notate the PER. Continue to increase the output power of the INT until the PER, displayed on the RX side, is greater than 1%. The difference between the TX and INT power measured on the RX side indicates the ability of the CCxxxx device to overcome interference.