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Performance Tests

Custom I/Q RF Modulation Quality (Option 402 Only)

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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

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Agilent Technologies E4438C Guida di Installazione Pagina 77