9 Appendix B: IS2083BM DUT Test Jig Tx Power Compensation

This chapter describes how to find the RF cable loss value on the RF meter window of the IS2083BM MPBT tool. The cable loss value compensates the RF path loss between test fixture RF test point and the tester’s RF port.

Perform the following steps for conductive RF power measurement:
  1. Prepare an IS2083BM DUT Board.
  2. Remove antenna and place a RF conductive SMA connector on RF test point.
  3. Set DUT in Test mode.
  4. Connect DUT Board to UART converter and Windows PC via USB cable.
  5. Connect SMA connector to RF tester, for example, Anritsu MT8852B.
    Figure 9-1. IS2083BM DUT RF Power Measurement Connection
  6. In the ISRT tool, set the following parameters:
    1. “Tx Modulation” as OFF (Continue Wave mode)
    2. “Channel” as CH38-2440 MHz
    3. “TX POWER TRIM Level” as PL0 and PL2 to measure the Tx power respectively.
  7. Click START and then measure the TX power on MT8852B.
    Figure 9-2. IS2083BM DUT TX Power Measure on ISRT Tool
  8. Record the measured power of PL0 and PL2 to TXPL0b and TXPL1b.
Perform the following steps for MPBT test fixture RF power measurement:
  1. Place IS2083BM DUT on MPBT test fixture, connect interface to PC and RF Tester.
    Figure 9-3. IS2083BM MPBT Test Fixture TX Power Measurement Connection
  2. Use the Labtest tool on PC to power on test fixture and set Test mode.
    1. In “Power Control”, select Victoria V2.5.
    2. Click Connect.
    3. Select the parameters as highlighted.
    Figure 9-4. Labtest Tool for IS2083BM MPBT Test Fixture
  3. In the ISRT tool, set the following parameters:
    1. “Tx Modulation” as OFF (Continue Wave mode)
    2. “Channel” as CH38-2440 MHz
    3. “TX POWER TRIM Level” as PL0 and PL2 to measure the Tx power respectively.
  4. Click START and then measure the TX power on MT8852B.
    Figure 9-5. IS2083BM DUT TX Power Measure on ISRT Tool
  5. Record the measured power of PL0 and PL2 TXPL0b and TXPL1b. For example, cable loss calculation of MPBT test fixture:
  • Cable loss value of PF0 = TXPL0a- TXPL0b
  • Cable loss value of PF2 = TXPL2a- TXPL2b