WCDMA Adjacent Channel Power
(Option H99 Rev B Only)

Adjacent Channel Power Ratio (ACPR) is the ratio of the power in a specified bandwidth within an adjacent, offset channel to the average power level in the main channel.

Alternate Channel Leakage Ratio (ACLR) is the ratio of the power in a specified bandwidth within a channel that is two offsets away from the main channel to the average power level in the main channel.

This test measures the energy in both adjacent and alternate channels with respect to the main channel and compares the measured energy to the total energy in the main channel.

For this test, the ESG generates a [W-CDMA, 1 DPCH] or [Test Model 1, 64 DPCH] waveform, then the ACP and ACL are measured directly with an E444xA spectrum analyzer.

Instrument

Critical Specification for This Test

Recommended Model

Spectrum Analyzer

Noise Floor <= –91 dBm

E4440A, E4443A, E4445A, E4446A, E4448A

 

Connections and Setup Procedures

All test equipment requires a 30 minute warm-up period to ensure accurate performance.

In the following test setup, direct cable and adapter connections are designated as solid lines. Changeable cable and adapter connections are designated as dashed lines.

 

  1. Connect all test equipment as shown.

  2. Connect GPIB cables to all GPIB-controlled test equipment.

  3. While performing this test, follow all instructions on the controller display.