Atec Agilent-8563E - Manual (Page 76)

ESG Family Signal Generators Performance Tests
12. Digital Modulation Level Accuracy
Calibration Guide 4-27
12. Digital Modulation Level Accuracy
This automated test verifies the level accuracy of the signal generator’s I and Q
modulation inputs. Two arbitrary waveform generators provide the I and Q modulation
inputs to the signal generator. A power meter measures the RF output power with and
without QPSK modulation applied to the signal generator. The difference in power
measurements is the level accuracy. The QPSK modulation is loaded into the two arbitrary
waveform generators from a data file in the performance tests software. The vector signal
analyzer verifies the arbitrary waveform generator’s outputs are properly scaled and
synchronized before the relative power level accuracy is measured.
Recommended Equipment
• HP/Agilent 438A Power Meter
• HP/Agilent 8482A Power Sensor
• HP/Agilent 33120A Option 001 Arbitrary Waveform Generator (2)
• HP/Agilent 89441A Options AY7, AY9, AYA, UFG or UTH Vector Signal Analyzer
Equipment Setup
Figure 4-24 Digital Modulation Level Accuracy Test Setup