User`s guide

Agilent PXT Wireless Communications Test Set
User’s Guide
199
Measurement Setup
Access the Measurement Interval setting by selecting the Meas Setup front-panel key. This setting must
be specified first. This will occur at the delayed trigger event. Once the measurement interval is specified
the number of power samples to consider for the CCDF calculation can either be set directly using the
Count setting or indirectly using the Measurement Cycles setting. If the Count is set, the number of
measurement cycles required is calculated by dividing the count value by the internal sampling rate times
the length of the measurement interval. If the Measurement Cycle is set, the count is calculated by
multiplying the number of measurement cycles, the internal sampling rate and the measurement interval.
Changing the Measurement Interval will cause the count and the number of measurement cycles to be
recalculated.
Uplink LTE Measurements
Key Path:
Mode > SA > LTE
The uplink LTE measurements fall into two groups – those which require demodulation of the signal and
those that do not.
The uplink LTE measurements that do not require demodulation are:
• Channel Power Measurement
• Occupied Bandwidth Measurement (FDD/TDD)
• Power vs. Time (FDD/TDD)
• Spectrum Emission Mask (SEM) Measurement (FDD/TDD)
• Adjacent Channel Leakage Ratio (ACLR) Measurement (FDD/TDD)
The uplink LTE measurements that require demodulation are:
• Constellation Measurement
• Power Spectrum Measurement
• Received IQ Data Measurement
• Map Information Measurement
• Error Vector Measurement
• Decoding Information Measurement
• Spectrum Flatness Measurement
• Modulation Quality Summary
Making Measurements Not Requiring Demodulation
The general settings described above are sufficient to make measurements not requiring demodulation.
The following description assumes that the frequency, reference level, and system bandwidth have been
correctly set. It also assumes that the trigger source is Internal and that the trigger delay is 0 ms.