Atec Agilent-8563E - Manual (Page 78)

ESG Family Signal Generators Performance Tests
14. Custom I/Q RF Modulation Quality (Option UN8 only)
Calibration Guide 4-29
14. Custom I/Q RF Modulation Quality
(Option UN8 only)
This automated test verifies the RF modulation quality of the Option UN8 signal
generator’s internal real time I/Q baseband modulation. A vector signal analyzer is
connected to the signal generator’s RF output. The Option UN8 internal baseband
generator modulates the RF carrier in each of the TDMA digital modulation formats. The
parameters of the individual TDMA formats common to Options UN3, UN4 and UN8 are
tested elsewhere. The vector signal analyzer measures the appropriate error parameter for
the modulation generated:
• EVM for QPSK,
π
/4DQPSK, and QAM16
• Phase error for MSK
• Frequency Shift Error (%) for FSK2
Recommended Equipment
• MD/MDC-174 Mixer (0.001 to 2.8 GHz)
• HP/Agilent 8663A Signal Generator
• HP/Agilent 89441A Options AY9, AYA, AYH, UFG or UTH Vector Signal Analyzer
Equipment Setups
Figure 4-26 Custom I/Q RF Modulation Quality
≤
2000 MHz Test Setup