Agilent Technologies E4438C - Manual (Page 77)

Performance Tests
Custom I/Q RF Modulation Quality (Option 402 Only)
3- 29
Custom I/Q RF Modulation Quality
(Option 402 Only)
This automated test verifies the RF modulation quality of the Option 402 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 402 internal baseband generator modulates the RF carrier in each of the TDMA digital modulation
formats. The parameters of the individual TDMA formats common to Option 402 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 (1.0 to 2.8 GHz)
• Agilent 8662A/8663A high-performance RF signal generator
• Agilent 89441A vector signal analyzer with Options AYA, AYH, AY7, AY9, B7A, UFG or UTH
Equipment Setups
Figure 3-26 Custom I/Q RF Modulation Quality
(Option 402 Only)
≤
2000 MHz Setup